Debezium Oracle Connector

Since Camel 3.17

Only consumer is supported

The Debezium oracle component is wrapper around Debezium using Debezium Engine, which enables Change Data Capture from oracle database using Debezium without the need for Kafka or Kafka Connect.

Note on handling failures: Per Debezium Embedded Engine documentation, the engines is actively recording source offsets and periodically flushes these offsets to a persistent storage, so when the application is restarted or crashed, the engine will resume from the last recorded offset. Thus, at normal operation, your downstream routes will receive each event exactly once, however in case of an application crash (not having a graceful shutdown), the application will resume from the last recorded offset, which may result in receiving duplicate events immediately after the restart. Therefore, your downstream routes should be tolerant enough of such case and deduplicate events if needed.

Maven users will need to add the following dependency to their pom.xml for this component.

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-debezium-oracle</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>

URI format

debezium-oracle:name[?options]

Configuring Options

Camel components are configured on two separate levels:

  • component level

  • endpoint level

Configuring Component Options

The component level is the highest level which holds general and common configurations that are inherited by the endpoints. For example a component may have security settings, credentials for authentication, urls for network connection and so forth.

Some components only have a few options, and others may have many. Because components typically have pre configured defaults that are commonly used, then you may often only need to configure a few options on a component; or none at all.

Configuring components can be done with the Component DSL, in a configuration file (application.properties|yaml), or directly with Java code.

Configuring Endpoint Options

Where you find yourself configuring the most is on endpoints, as endpoints often have many options, which allows you to configure what you need the endpoint to do. The options are also categorized into whether the endpoint is used as consumer (from) or as a producer (to), or used for both.

Configuring endpoints is most often done directly in the endpoint URI as path and query parameters. You can also use the Endpoint DSL and DataFormat DSL as a type safe way of configuring endpoints and data formats in Java.

A good practice when configuring options is to use Property Placeholders, which allows to not hardcode urls, port numbers, sensitive information, and other settings. In other words placeholders allows to externalize the configuration from your code, and gives more flexibility and reuse.

The following two sections lists all the options, firstly for the component followed by the endpoint.

Component Options

The Debezium Oracle Connector component supports 106 options, which are listed below.

Name Description Default Type

additionalProperties (common)

Additional properties for debezium components in case they can’t be set directly on the camel configurations (e.g: setting Kafka Connect properties needed by Debezium engine, for example setting KafkaOffsetBackingStore), the properties have to be prefixed with additionalProperties.. E.g: additionalProperties.transactional.id=12345&additionalProperties.schema.registry.url=http://localhost:8811/avro.

Map

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

configuration (consumer)

Allow pre-configured Configurations to be set.

OracleConnectorEmbeddedDebeziumConfiguration

internalKeyConverter (consumer)

The Converter class that should be used to serialize and deserialize key data for offsets. The default is JSON converter.

org.apache.kafka.connect.json.JsonConverter

String

internalValueConverter (consumer)

The Converter class that should be used to serialize and deserialize value data for offsets. The default is JSON converter.

org.apache.kafka.connect.json.JsonConverter

String

offsetCommitPolicy (consumer)

The name of the Java class of the commit policy. It defines when offsets commit has to be triggered based on the number of events processed and the time elapsed since the last commit. This class must implement the interface 'OffsetCommitPolicy'. The default is a periodic commit policy based upon time intervals.

String

offsetCommitTimeoutMs (consumer)

Maximum number of milliseconds to wait for records to flush and partition offset data to be committed to offset storage before cancelling the process and restoring the offset data to be committed in a future attempt. The default is 5 seconds.

5000

long

offsetFlushIntervalMs (consumer)

Interval at which to try committing offsets. The default is 1 minute.

60000

long

offsetStorage (consumer)

The name of the Java class that is responsible for persistence of connector offsets.

org.apache.kafka.connect.storage.FileOffsetBackingStore

String

offsetStorageFileName (consumer)

Path to file where offsets are to be stored. Required when offset.storage is set to the FileOffsetBackingStore.

String

offsetStoragePartitions (consumer)

The number of partitions used when creating the offset storage topic. Required when offset.storage is set to the 'KafkaOffsetBackingStore'.

int

offsetStorageReplicationFactor (consumer)

Replication factor used when creating the offset storage topic. Required when offset.storage is set to the KafkaOffsetBackingStore.

int

offsetStorageTopic (consumer)

The name of the Kafka topic where offsets are to be stored. Required when offset.storage is set to the KafkaOffsetBackingStore.

String

autowiredEnabled (advanced)

Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc.

true

boolean

binaryHandlingMode (oracle)

Specify how binary (blob, binary, etc.) columns should be represented in change events, including: 'bytes' represents binary data as byte array (default); 'base64' represents binary data as base64-encoded string; 'base64-url-safe' represents binary data as base64-url-safe-encoded string; 'hex' represents binary data as hex-encoded (base16) string.

bytes

String

columnExcludeList (oracle)

Regular expressions matching columns to exclude from change events.

String

columnIncludeList (oracle)

Regular expressions matching columns to include in change events.

String

columnPropagateSourceType (oracle)

A comma-separated list of regular expressions matching fully-qualified names of columns that adds the columns original type and original length as parameters to the corresponding field schemas in the emitted change records.

String

converters (oracle)

Optional list of custom converters that would be used instead of default ones. The converters are defined using '.type' config option and configured using options '.'.

String

databaseConnectionAdapter (oracle)

The adapter to use when capturing changes from the database. Options include: 'logminer': (the default) to capture changes using native Oracle LogMiner; 'xstream' to capture changes using Oracle XStreams.

LogMiner

String

databaseDbname (oracle)

The name of the database from which the connector should capture changes.

String

databaseHostname (oracle)

Resolvable hostname or IP address of the database server.

String

databaseOutServerName (oracle)

Name of the XStream Out server to connect to.

String

databasePassword (oracle)

Required Password of the database user to be used when connecting to the database.

String

databasePdbName (oracle)

Name of the pluggable database when working with a multi-tenant set-up. The CDB name must be given via database.dbname in this case.

String

databasePort (oracle)

Port of the database server.

1528

int

databaseUrl (oracle)

Complete JDBC URL as an alternative to specifying hostname, port and database provided as a way to support alternative connection scenarios.

String

databaseUser (oracle)

Name of the database user to be used when connecting to the database.

String

datatypePropagateSourceType (oracle)

A comma-separated list of regular expressions matching the database-specific data type names that adds the data type’s original type and original length as parameters to the corresponding field schemas in the emitted change records.

String

decimalHandlingMode (oracle)

Specify how DECIMAL and NUMERIC columns should be represented in change events, including: 'precise' (the default) uses java.math.BigDecimal to represent values, which are encoded in the change events using a binary representation and Kafka Connect’s 'org.apache.kafka.connect.data.Decimal' type; 'string' uses string to represent values; 'double' represents values using Java’s 'double', which may not offer the precision but will be far easier to use in consumers.

precise

String

errorsMaxRetries (oracle)

The maximum number of retries on connection errors before failing (-1 = no limit, 0 = disabled, 0 = num of retries).

-1

int

eventProcessingFailureHandlingMode (oracle)

Specify how failures during processing of events (i.e. when encountering a corrupted event) should be handled, including: 'fail' (the default) an exception indicating the problematic event and its position is raised, causing the connector to be stopped; 'warn' the problematic event and its position will be logged and the event will be skipped; 'ignore' the problematic event will be skipped.

fail

String

heartbeatActionQuery (oracle)

The query executed with every heartbeat.

String

heartbeatIntervalMs (oracle)

Length of an interval in milli-seconds in in which the connector periodically sends heartbeat messages to a heartbeat topic. Use 0 to disable heartbeat messages. Disabled by default.

0ms

int

heartbeatTopicsPrefix (oracle)

The prefix that is used to name heartbeat topics.Defaults to __debezium-heartbeat.

__debezium-heartbeat

String

includeSchemaChanges (oracle)

Whether the connector should publish changes in the database schema to a Kafka topic with the same name as the database server ID. Each schema change will be recorded using a key that contains the database name and whose value include logical description of the new schema and optionally the DDL statement(s). The default is 'true'. This is independent of how the connector internally records database schema history.

true

boolean

includeSchemaComments (oracle)

Whether the connector parse table and column’s comment to metadata object. Note: Enable this option will bring the implications on memory usage. The number and size of ColumnImpl objects is what largely impacts how much memory is consumed by the Debezium connectors, and adding a String to each of them can potentially be quite heavy. The default is 'false'.

false

boolean

intervalHandlingMode (oracle)

Specify how INTERVAL columns should be represented in change events, including: 'string' represents values as an exact ISO formatted string; 'numeric' (default) represents values using the inexact conversion into microseconds.

numeric

String

lobEnabled (oracle)

When set to 'false', the default, LOB fields will not be captured nor emitted. When set to 'true', the connector will capture LOB fields and emit changes for those fields like any other column type.

false

boolean

logMiningArchiveDestinationName (oracle)

Sets the specific archive log destination as the source for reading archive logs.When not set, the connector will automatically select the first LOCAL and VALID destination.

String

logMiningArchiveLogHours (oracle)

The number of hours in the past from SYSDATE to mine archive logs. Using 0 mines all available archive logs.

0

long

logMiningArchiveLogOnlyMode (oracle)

When set to 'false', the default, the connector will mine both archive log and redo logs to emit change events. When set to 'true', the connector will only mine archive logs. There are circumstances where its advantageous to only mine archive logs and accept latency in event emission due to frequent revolving redo logs.

false

boolean

logMiningArchiveLogOnlyScnPollIntervalMs (oracle)

The interval in milliseconds to wait between polls checking to see if the SCN is in the archive logs.

10s

long

logMiningBatchSizeDefault (oracle)

The starting SCN interval size that the connector will use for reading data from redo/archive logs.

20000

long

logMiningBatchSizeMax (oracle)

The maximum SCN interval size that this connector will use when reading from redo/archive logs.

100000

long

logMiningBatchSizeMin (oracle)

The minimum SCN interval size that this connector will try to read from redo/archive logs. Active batch size will be also increased/decreased by this amount for tuning connector throughput when needed.

1000

long

logMiningBufferDropOnStop (oracle)

When set to true the underlying buffer cache is not retained when the connector is stopped. When set to false (the default), the buffer cache is retained across restarts.

false

boolean

logMiningBufferInfinispanCacheEvents (oracle)

Specifies the XML configuration for the Infinispan 'events' cache.

String

logMiningBufferInfinispanCacheProcessedTransactions (oracle)

Specifies the XML configuration for the Infinispan 'processed-transactions' cache.

String

logMiningBufferInfinispanCacheSchemaChanges (oracle)

Specifies the XML configuration for the Infinispan 'schema-changes' cache.

String

logMiningBufferInfinispanCacheTransactions (oracle)

Specifies the XML configuration for the Infinispan 'transactions' cache.

String

logMiningBufferTransactionEventsThreshold (oracle)

The number of events a transaction can include before the transaction is discarded. This is useful for managing buffer memory and/or space when dealing with very large transactions. Defaults to 0, meaning that no threshold is applied and transactions can have unlimited events.

0

long

logMiningBufferType (oracle)

The buffer type controls how the connector manages buffering transaction data. memory - Uses the JVM process' heap to buffer all transaction data. infinispan_embedded - This option uses an embedded Infinispan cache to buffer transaction data and persist it to disk. infinispan_remote - This option uses a remote Infinispan cluster to buffer transaction data and persist it to disk.

memory

String

logMiningFlushTableName (oracle)

The name of the flush table used by the connector, defaults to LOG_MINING_FLUSH.

LOG_MINING_FLUSH

String

logMiningQueryFilterMode (oracle)

Specifies how the filter configuration is applied to the LogMiner database query. none - The query does not apply any schema or table filters, all filtering is at runtime by the connector. in - The query uses SQL in-clause expressions to specify the schema or table filters. regex - The query uses Oracle REGEXP_LIKE expressions to specify the schema or table filters.

none

String

logMiningRestartConnection (oracle)

Debezium opens a database connection and keeps that connection open throughout the entire streaming phase. In some situations, this can lead to excessive SGA memory usage. By setting this option to 'true' (the default is 'false'), the connector will close and re-open a database connection after every detected log switch or if the log.mining.session.max.ms has been reached.

false

boolean

logMiningScnGapDetectionGapSizeMin (oracle)

Used for SCN gap detection, if the difference between current SCN and previous end SCN is bigger than this value, and the time difference of current SCN and previous end SCN is smaller than log.mining.scn.gap.detection.time.interval.max.ms, consider it a SCN gap.

1000000

long

logMiningScnGapDetectionTimeIntervalMaxMs (oracle)

Used for SCN gap detection, if the difference between current SCN and previous end SCN is bigger than log.mining.scn.gap.detection.gap.size.min, and the time difference of current SCN and previous end SCN is smaller than this value, consider it a SCN gap.

20s

long

logMiningSessionMaxMs (oracle)

The maximum number of milliseconds that a LogMiner session lives for before being restarted. Defaults to 0 (indefinite until a log switch occurs).

0ms

long

logMiningSleepTimeDefaultMs (oracle)

The amount of time that the connector will sleep after reading data from redo/archive logs and before starting reading data again. Value is in milliseconds.

1s

long

logMiningSleepTimeIncrementMs (oracle)

The maximum amount of time that the connector will use to tune the optimal sleep time when reading data from LogMiner. Value is in milliseconds.

200ms

long

logMiningSleepTimeMaxMs (oracle)

The maximum amount of time that the connector will sleep after reading data from redo/archive logs and before starting reading data again. Value is in milliseconds.

3s

long

logMiningSleepTimeMinMs (oracle)

The minimum amount of time that the connector will sleep after reading data from redo/archive logs and before starting reading data again. Value is in milliseconds.

0ms

long

logMiningStrategy (oracle)

There are strategies: Online catalog with faster mining but no captured DDL. Another - with data dictionary loaded into REDO LOG files.

redo_log_catalog

String

logMiningTransactionRetentionMs (oracle)

Duration in milliseconds to keep long running transactions in transaction buffer between log mining sessions. By default, all transactions are retained.

0ms

long

logMiningUsernameExcludeList (oracle)

Comma separated list of usernames to exclude from LogMiner query.

String

logMiningUsernameIncludeList (oracle)

Comma separated list of usernames to include from LogMiner query.

String

maxBatchSize (oracle)

Maximum size of each batch of source records. Defaults to 2048.

2048

int

maxQueueSize (oracle)

Maximum size of the queue for change events read from the database log but not yet recorded or forwarded. Defaults to 8192, and should always be larger than the maximum batch size.

8192

int

maxQueueSizeInBytes (oracle)

Maximum size of the queue in bytes for change events read from the database log but not yet recorded or forwarded. Defaults to 0. Mean the feature is not enabled.

0

long

messageKeyColumns (oracle)

A semicolon-separated list of expressions that match fully-qualified tables and column(s) to be used as message key. Each expression must match the pattern ':', where the table names could be defined as (DB_NAME.TABLE_NAME) or (SCHEMA_NAME.TABLE_NAME), depending on the specific connector, and the key columns are a comma-separated list of columns representing the custom key. For any table without an explicit key configuration the table’s primary key column(s) will be used as message key. Example: dbserver1.inventory.orderlines:orderId,orderLineId;dbserver1.inventory.orders:id.

String

notificationEnabledChannels (oracle)

List of notification channels names that are enabled.

String

notificationSinkTopicName (oracle)

The name of the topic for the notifications. This is required in case 'sink' is in the list of enabled channels.

String

pollIntervalMs (oracle)

Time to wait for new change events to appear after receiving no events, given in milliseconds. Defaults to 500 ms.

500ms

long

provideTransactionMetadata (oracle)

Enables transaction metadata extraction together with event counting.

false

boolean

queryFetchSize (oracle)

The maximum number of records that should be loaded into memory while streaming. A value of '0' uses the default JDBC fetch size, defaults to '2000'.

10000

int

racNodes (oracle)

A comma-separated list of RAC node hostnames or ip addresses.

String

retriableRestartConnectorWaitMs (oracle)

Time to wait before restarting connector after retriable exception occurs. Defaults to 10000ms.

10s

long

schemaHistoryInternal (oracle)

The name of the SchemaHistory class that should be used to store and recover database schema changes. The configuration properties for the history are prefixed with the 'schema.history.internal.' string.

io.debezium.storage.kafka.history.KafkaSchemaHistory

String

schemaHistoryInternalFileFilename (oracle)

The path to the file that will be used to record the database schema history.

String

schemaHistoryInternalSkipUnparseableDdl (oracle)

Controls the action Debezium will take when it meets a DDL statement in binlog, that it cannot parse.By default the connector will stop operating but by changing the setting it can ignore the statements which it cannot parse. If skipping is enabled then Debezium can miss metadata changes.

false

boolean

schemaHistoryInternalStoreOnlyCapturedDatabasesDdl (oracle)

Controls what DDL will Debezium store in database schema history. By default (true) only DDL that manipulates a table from captured schema/database will be stored. If set to false, then Debezium will store all incoming DDL statements.

false

boolean

schemaHistoryInternalStoreOnlyCapturedTablesDdl (oracle)

Controls what DDL will Debezium store in database schema history. By default (false) Debezium will store all incoming DDL statements. If set to true, then only DDL that manipulates a captured table will be stored.

false

boolean

schemaNameAdjustmentMode (oracle)

Specify how schema names should be adjusted for compatibility with the message converter used by the connector, including: 'avro' replaces the characters that cannot be used in the Avro type name with underscore; 'avro_unicode' replaces the underscore or characters that cannot be used in the Avro type name with corresponding unicode like _uxxxx. Note: _ is an escape sequence like backslash in Java;'none' does not apply any adjustment (default).

none

String

signalDataCollection (oracle)

The name of the data collection that is used to send signals/commands to Debezium. Signaling is disabled when not set.

String

signalEnabledChannels (oracle)

List of channels names that are enabled. Source channel is enabled by default.

source

String

signalPollIntervalMs (oracle)

Interval for looking for new signals in registered channels, given in milliseconds. Defaults to 5 seconds.

5s

long

skippedOperations (oracle)

The comma-separated list of operations to skip during streaming, defined as: 'c' for inserts/create; 'u' for updates; 'd' for deletes, 't' for truncates, and 'none' to indicate nothing skipped. By default, only truncate operations will be skipped.

t

String

snapshotDelayMs (oracle)

A delay period before a snapshot will begin, given in milliseconds. Defaults to 0 ms.

0ms

long

snapshotEnhancePredicateScn (oracle)

A token to replace on snapshot predicate template.

String

snapshotFetchSize (oracle)

The maximum number of records that should be loaded into memory while performing a snapshot.

int

snapshotIncludeCollectionList (oracle)

This setting must be set to specify a list of tables/collections whose snapshot must be taken on creating or restarting the connector.

String

snapshotLockingMode (oracle)

Controls how the connector holds locks on tables while performing the schema snapshot. The default is 'shared', which means the connector will hold a table lock that prevents exclusive table access for just the initial portion of the snapshot while the database schemas and other metadata are being read. The remaining work in a snapshot involves selecting all rows from each table, and this is done using a flashback query that requires no locks. However, in some cases it may be desirable to avoid locks entirely which can be done by specifying 'none'. This mode is only safe to use if no schema changes are happening while the snapshot is taken.

shared

String

snapshotLockTimeoutMs (oracle)

The maximum number of millis to wait for table locks at the beginning of a snapshot. If locks cannot be acquired in this time frame, the snapshot will be aborted. Defaults to 10 seconds.

10s

long

snapshotMaxThreads (oracle)

The maximum number of threads used to perform the snapshot. Defaults to 1.

1

int

snapshotMode (oracle)

The criteria for running a snapshot upon startup of the connector. Select one of the following snapshot options: 'always': The connector runs a snapshot every time that it starts. After the snapshot completes, the connector begins to stream changes from the redo logs.; 'initial' (default): If the connector does not detect any offsets for the logical server name, it runs a snapshot that captures the current full state of the configured tables. After the snapshot completes, the connector begins to stream changes from the redo logs. 'initial_only': The connector performs a snapshot as it does for the 'initial' option, but after the connector completes the snapshot, it stops, and does not stream changes from the redo logs.; 'schema_only': If the connector does not detect any offsets for the logical server name, it runs a snapshot that captures only the schema (table structures), but not any table data. After the snapshot completes, the connector begins to stream changes from the redo logs.; 'schema_only_recovery': The connector performs a snapshot that captures only the database schema history. The connector then transitions to streaming from the redo logs. Use this setting to restore a corrupted or lost database schema history topic. Do not use if the database schema was modified after the connector stopped.

initial

String

snapshotSelectStatementOverrides (oracle)

This property contains a comma-separated list of fully-qualified tables (DB_NAME.TABLE_NAME) or (SCHEMA_NAME.TABLE_NAME), depending on the specific connectors. Select statements for the individual tables are specified in further configuration properties, one for each table, identified by the id 'snapshot.select.statement.overrides.DB_NAME.TABLE_NAME' or 'snapshot.select.statement.overrides.SCHEMA_NAME.TABLE_NAME', respectively. The value of those properties is the select statement to use when retrieving data from the specific table during snapshotting. A possible use case for large append-only tables is setting a specific point where to start (resume) snapshotting, in case a previous snapshotting was interrupted.

String

snapshotTablesOrderByRowCount (oracle)

Controls the order in which tables are processed in the initial snapshot. A descending value will order the tables by row count descending. A ascending value will order the tables by row count ascending. A value of disabled (the default) will disable ordering by row count.

disabled

String

sourceinfoStructMaker (oracle)

The name of the SourceInfoStructMaker class that returns SourceInfo schema and struct.

io.debezium.connector.oracle.OracleSourceInfoStructMaker

String

tableExcludeList (oracle)

A comma-separated list of regular expressions that match the fully-qualified names of tables to be excluded from monitoring.

String

tableIncludeList (oracle)

The tables for which changes are to be captured.

String

timePrecisionMode (oracle)

Time, date, and timestamps can be represented with different kinds of precisions, including: 'adaptive' (the default) bases the precision of time, date, and timestamp values on the database column’s precision; 'adaptive_time_microseconds' like 'adaptive' mode, but TIME fields always use microseconds precision; 'connect' always represents time, date, and timestamp values using Kafka Connect’s built-in representations for Time, Date, and Timestamp, which uses millisecond precision regardless of the database columns' precision.

adaptive

String

tombstonesOnDelete (oracle)

Whether delete operations should be represented by a delete event and a subsequent tombstone event (true) or only by a delete event (false). Emitting the tombstone event (the default behavior) allows Kafka to completely delete all events pertaining to the given key once the source record got deleted.

false

boolean

topicNamingStrategy (oracle)

The name of the TopicNamingStrategy class that should be used to determine the topic name for data change, schema change, transaction, heartbeat event etc.

io.debezium.schema.SchemaTopicNamingStrategy

String

topicPrefix (oracle)

Required Topic prefix that identifies and provides a namespace for the particular database server/cluster is capturing changes. The topic prefix should be unique across all other connectors, since it is used as a prefix for all Kafka topic names that receive events emitted by this connector. Only alphanumeric characters, hyphens, dots and underscores must be accepted.

String

unavailableValuePlaceholder (oracle)

Specify the constant that will be provided by Debezium to indicate that the original value is unavailable and not provided by the database.

__debezium_unavailable_value

String

Endpoint Options

The Debezium Oracle Connector endpoint is configured using URI syntax:

debezium-oracle:name

with the following path and query parameters:

Path Parameters (1 parameters)

Name Description Default Type

name (consumer)

Required Unique name for the connector. Attempting to register again with the same name will fail.

String

Query Parameters (106 parameters)

Name Description Default Type

additionalProperties (common)

Additional properties for debezium components in case they can’t be set directly on the camel configurations (e.g: setting Kafka Connect properties needed by Debezium engine, for example setting KafkaOffsetBackingStore), the properties have to be prefixed with additionalProperties.. E.g: additionalProperties.transactional.id=12345&additionalProperties.schema.registry.url=http://localhost:8811/avro.

Map

internalKeyConverter (consumer)

The Converter class that should be used to serialize and deserialize key data for offsets. The default is JSON converter.

org.apache.kafka.connect.json.JsonConverter

String

internalValueConverter (consumer)

The Converter class that should be used to serialize and deserialize value data for offsets. The default is JSON converter.

org.apache.kafka.connect.json.JsonConverter

String

offsetCommitPolicy (consumer)

The name of the Java class of the commit policy. It defines when offsets commit has to be triggered based on the number of events processed and the time elapsed since the last commit. This class must implement the interface 'OffsetCommitPolicy'. The default is a periodic commit policy based upon time intervals.

String

offsetCommitTimeoutMs (consumer)

Maximum number of milliseconds to wait for records to flush and partition offset data to be committed to offset storage before cancelling the process and restoring the offset data to be committed in a future attempt. The default is 5 seconds.

5000

long

offsetFlushIntervalMs (consumer)

Interval at which to try committing offsets. The default is 1 minute.

60000

long

offsetStorage (consumer)

The name of the Java class that is responsible for persistence of connector offsets.

org.apache.kafka.connect.storage.FileOffsetBackingStore

String

offsetStorageFileName (consumer)

Path to file where offsets are to be stored. Required when offset.storage is set to the FileOffsetBackingStore.

String

offsetStoragePartitions (consumer)

The number of partitions used when creating the offset storage topic. Required when offset.storage is set to the 'KafkaOffsetBackingStore'.

int

offsetStorageReplicationFactor (consumer)

Replication factor used when creating the offset storage topic. Required when offset.storage is set to the KafkaOffsetBackingStore.

int

offsetStorageTopic (consumer)

The name of the Kafka topic where offsets are to be stored. Required when offset.storage is set to the KafkaOffsetBackingStore.

String

bridgeErrorHandler (consumer (advanced))

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

exceptionHandler (consumer (advanced))

To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored.

ExceptionHandler

exchangePattern (consumer (advanced))

Sets the exchange pattern when the consumer creates an exchange.

Enum values:

  • InOnly

  • InOut

ExchangePattern

binaryHandlingMode (oracle)

Specify how binary (blob, binary, etc.) columns should be represented in change events, including: 'bytes' represents binary data as byte array (default); 'base64' represents binary data as base64-encoded string; 'base64-url-safe' represents binary data as base64-url-safe-encoded string; 'hex' represents binary data as hex-encoded (base16) string.

bytes

String

columnExcludeList (oracle)

Regular expressions matching columns to exclude from change events.

String

columnIncludeList (oracle)

Regular expressions matching columns to include in change events.

String

columnPropagateSourceType (oracle)

A comma-separated list of regular expressions matching fully-qualified names of columns that adds the columns original type and original length as parameters to the corresponding field schemas in the emitted change records.

String

converters (oracle)

Optional list of custom converters that would be used instead of default ones. The converters are defined using '.type' config option and configured using options '.'.

String

databaseConnectionAdapter (oracle)

The adapter to use when capturing changes from the database. Options include: 'logminer': (the default) to capture changes using native Oracle LogMiner; 'xstream' to capture changes using Oracle XStreams.

LogMiner

String

databaseDbname (oracle)

The name of the database from which the connector should capture changes.

String

databaseHostname (oracle)

Resolvable hostname or IP address of the database server.

String

databaseOutServerName (oracle)

Name of the XStream Out server to connect to.

String

databasePassword (oracle)

Required Password of the database user to be used when connecting to the database.

String

databasePdbName (oracle)

Name of the pluggable database when working with a multi-tenant set-up. The CDB name must be given via database.dbname in this case.

String

databasePort (oracle)

Port of the database server.

1528

int

databaseUrl (oracle)

Complete JDBC URL as an alternative to specifying hostname, port and database provided as a way to support alternative connection scenarios.

String

databaseUser (oracle)

Name of the database user to be used when connecting to the database.

String

datatypePropagateSourceType (oracle)

A comma-separated list of regular expressions matching the database-specific data type names that adds the data type’s original type and original length as parameters to the corresponding field schemas in the emitted change records.

String

decimalHandlingMode (oracle)

Specify how DECIMAL and NUMERIC columns should be represented in change events, including: 'precise' (the default) uses java.math.BigDecimal to represent values, which are encoded in the change events using a binary representation and Kafka Connect’s 'org.apache.kafka.connect.data.Decimal' type; 'string' uses string to represent values; 'double' represents values using Java’s 'double', which may not offer the precision but will be far easier to use in consumers.

precise

String

errorsMaxRetries (oracle)

The maximum number of retries on connection errors before failing (-1 = no limit, 0 = disabled, 0 = num of retries).

-1

int

eventProcessingFailureHandlingMode (oracle)

Specify how failures during processing of events (i.e. when encountering a corrupted event) should be handled, including: 'fail' (the default) an exception indicating the problematic event and its position is raised, causing the connector to be stopped; 'warn' the problematic event and its position will be logged and the event will be skipped; 'ignore' the problematic event will be skipped.

fail

String

heartbeatActionQuery (oracle)

The query executed with every heartbeat.

String

heartbeatIntervalMs (oracle)

Length of an interval in milli-seconds in in which the connector periodically sends heartbeat messages to a heartbeat topic. Use 0 to disable heartbeat messages. Disabled by default.

0ms

int

heartbeatTopicsPrefix (oracle)

The prefix that is used to name heartbeat topics.Defaults to __debezium-heartbeat.

__debezium-heartbeat

String

includeSchemaChanges (oracle)

Whether the connector should publish changes in the database schema to a Kafka topic with the same name as the database server ID. Each schema change will be recorded using a key that contains the database name and whose value include logical description of the new schema and optionally the DDL statement(s). The default is 'true'. This is independent of how the connector internally records database schema history.

true

boolean

includeSchemaComments (oracle)

Whether the connector parse table and column’s comment to metadata object. Note: Enable this option will bring the implications on memory usage. The number and size of ColumnImpl objects is what largely impacts how much memory is consumed by the Debezium connectors, and adding a String to each of them can potentially be quite heavy. The default is 'false'.

false

boolean

intervalHandlingMode (oracle)

Specify how INTERVAL columns should be represented in change events, including: 'string' represents values as an exact ISO formatted string; 'numeric' (default) represents values using the inexact conversion into microseconds.

numeric

String

lobEnabled (oracle)

When set to 'false', the default, LOB fields will not be captured nor emitted. When set to 'true', the connector will capture LOB fields and emit changes for those fields like any other column type.

false

boolean

logMiningArchiveDestinationName (oracle)

Sets the specific archive log destination as the source for reading archive logs.When not set, the connector will automatically select the first LOCAL and VALID destination.

String

logMiningArchiveLogHours (oracle)

The number of hours in the past from SYSDATE to mine archive logs. Using 0 mines all available archive logs.

0

long

logMiningArchiveLogOnlyMode (oracle)

When set to 'false', the default, the connector will mine both archive log and redo logs to emit change events. When set to 'true', the connector will only mine archive logs. There are circumstances where its advantageous to only mine archive logs and accept latency in event emission due to frequent revolving redo logs.

false

boolean

logMiningArchiveLogOnlyScnPollIntervalMs (oracle)

The interval in milliseconds to wait between polls checking to see if the SCN is in the archive logs.

10s

long

logMiningBatchSizeDefault (oracle)

The starting SCN interval size that the connector will use for reading data from redo/archive logs.

20000

long

logMiningBatchSizeMax (oracle)

The maximum SCN interval size that this connector will use when reading from redo/archive logs.

100000

long

logMiningBatchSizeMin (oracle)

The minimum SCN interval size that this connector will try to read from redo/archive logs. Active batch size will be also increased/decreased by this amount for tuning connector throughput when needed.

1000

long

logMiningBufferDropOnStop (oracle)

When set to true the underlying buffer cache is not retained when the connector is stopped. When set to false (the default), the buffer cache is retained across restarts.

false

boolean

logMiningBufferInfinispanCacheEvents (oracle)

Specifies the XML configuration for the Infinispan 'events' cache.

String

logMiningBufferInfinispanCacheProcessedTransactions (oracle)

Specifies the XML configuration for the Infinispan 'processed-transactions' cache.

String

logMiningBufferInfinispanCacheSchemaChanges (oracle)

Specifies the XML configuration for the Infinispan 'schema-changes' cache.

String

logMiningBufferInfinispanCacheTransactions (oracle)

Specifies the XML configuration for the Infinispan 'transactions' cache.

String

logMiningBufferTransactionEventsThreshold (oracle)

The number of events a transaction can include before the transaction is discarded. This is useful for managing buffer memory and/or space when dealing with very large transactions. Defaults to 0, meaning that no threshold is applied and transactions can have unlimited events.

0

long

logMiningBufferType (oracle)

The buffer type controls how the connector manages buffering transaction data. memory - Uses the JVM process' heap to buffer all transaction data. infinispan_embedded - This option uses an embedded Infinispan cache to buffer transaction data and persist it to disk. infinispan_remote - This option uses a remote Infinispan cluster to buffer transaction data and persist it to disk.

memory

String

logMiningFlushTableName (oracle)

The name of the flush table used by the connector, defaults to LOG_MINING_FLUSH.

LOG_MINING_FLUSH

String

logMiningQueryFilterMode (oracle)

Specifies how the filter configuration is applied to the LogMiner database query. none - The query does not apply any schema or table filters, all filtering is at runtime by the connector. in - The query uses SQL in-clause expressions to specify the schema or table filters. regex - The query uses Oracle REGEXP_LIKE expressions to specify the schema or table filters.

none

String

logMiningRestartConnection (oracle)

Debezium opens a database connection and keeps that connection open throughout the entire streaming phase. In some situations, this can lead to excessive SGA memory usage. By setting this option to 'true' (the default is 'false'), the connector will close and re-open a database connection after every detected log switch or if the log.mining.session.max.ms has been reached.

false

boolean

logMiningScnGapDetectionGapSizeMin (oracle)

Used for SCN gap detection, if the difference between current SCN and previous end SCN is bigger than this value, and the time difference of current SCN and previous end SCN is smaller than log.mining.scn.gap.detection.time.interval.max.ms, consider it a SCN gap.

1000000

long

logMiningScnGapDetectionTimeIntervalMaxMs (oracle)

Used for SCN gap detection, if the difference between current SCN and previous end SCN is bigger than log.mining.scn.gap.detection.gap.size.min, and the time difference of current SCN and previous end SCN is smaller than this value, consider it a SCN gap.

20s

long

logMiningSessionMaxMs (oracle)

The maximum number of milliseconds that a LogMiner session lives for before being restarted. Defaults to 0 (indefinite until a log switch occurs).

0ms

long

logMiningSleepTimeDefaultMs (oracle)

The amount of time that the connector will sleep after reading data from redo/archive logs and before starting reading data again. Value is in milliseconds.

1s

long

logMiningSleepTimeIncrementMs (oracle)

The maximum amount of time that the connector will use to tune the optimal sleep time when reading data from LogMiner. Value is in milliseconds.

200ms

long

logMiningSleepTimeMaxMs (oracle)

The maximum amount of time that the connector will sleep after reading data from redo/archive logs and before starting reading data again. Value is in milliseconds.

3s

long

logMiningSleepTimeMinMs (oracle)

The minimum amount of time that the connector will sleep after reading data from redo/archive logs and before starting reading data again. Value is in milliseconds.

0ms

long

logMiningStrategy (oracle)

There are strategies: Online catalog with faster mining but no captured DDL. Another - with data dictionary loaded into REDO LOG files.

redo_log_catalog

String

logMiningTransactionRetentionMs (oracle)

Duration in milliseconds to keep long running transactions in transaction buffer between log mining sessions. By default, all transactions are retained.

0ms

long

logMiningUsernameExcludeList (oracle)

Comma separated list of usernames to exclude from LogMiner query.

String

logMiningUsernameIncludeList (oracle)

Comma separated list of usernames to include from LogMiner query.

String

maxBatchSize (oracle)

Maximum size of each batch of source records. Defaults to 2048.

2048

int

maxQueueSize (oracle)

Maximum size of the queue for change events read from the database log but not yet recorded or forwarded. Defaults to 8192, and should always be larger than the maximum batch size.

8192

int

maxQueueSizeInBytes (oracle)

Maximum size of the queue in bytes for change events read from the database log but not yet recorded or forwarded. Defaults to 0. Mean the feature is not enabled.

0

long

messageKeyColumns (oracle)

A semicolon-separated list of expressions that match fully-qualified tables and column(s) to be used as message key. Each expression must match the pattern ':', where the table names could be defined as (DB_NAME.TABLE_NAME) or (SCHEMA_NAME.TABLE_NAME), depending on the specific connector, and the key columns are a comma-separated list of columns representing the custom key. For any table without an explicit key configuration the table’s primary key column(s) will be used as message key. Example: dbserver1.inventory.orderlines:orderId,orderLineId;dbserver1.inventory.orders:id.

String

notificationEnabledChannels (oracle)

List of notification channels names that are enabled.

String

notificationSinkTopicName (oracle)

The name of the topic for the notifications. This is required in case 'sink' is in the list of enabled channels.

String

pollIntervalMs (oracle)

Time to wait for new change events to appear after receiving no events, given in milliseconds. Defaults to 500 ms.

500ms

long

provideTransactionMetadata (oracle)

Enables transaction metadata extraction together with event counting.

false

boolean

queryFetchSize (oracle)

The maximum number of records that should be loaded into memory while streaming. A value of '0' uses the default JDBC fetch size, defaults to '2000'.

10000

int

racNodes (oracle)

A comma-separated list of RAC node hostnames or ip addresses.

String

retriableRestartConnectorWaitMs (oracle)

Time to wait before restarting connector after retriable exception occurs. Defaults to 10000ms.

10s

long

schemaHistoryInternal (oracle)

The name of the SchemaHistory class that should be used to store and recover database schema changes. The configuration properties for the history are prefixed with the 'schema.history.internal.' string.

io.debezium.storage.kafka.history.KafkaSchemaHistory

String

schemaHistoryInternalFileFilename (oracle)

The path to the file that will be used to record the database schema history.

String

schemaHistoryInternalSkipUnparseableDdl (oracle)

Controls the action Debezium will take when it meets a DDL statement in binlog, that it cannot parse.By default the connector will stop operating but by changing the setting it can ignore the statements which it cannot parse. If skipping is enabled then Debezium can miss metadata changes.

false

boolean

schemaHistoryInternalStoreOnlyCapturedDatabasesDdl (oracle)

Controls what DDL will Debezium store in database schema history. By default (true) only DDL that manipulates a table from captured schema/database will be stored. If set to false, then Debezium will store all incoming DDL statements.

false

boolean

schemaHistoryInternalStoreOnlyCapturedTablesDdl (oracle)

Controls what DDL will Debezium store in database schema history. By default (false) Debezium will store all incoming DDL statements. If set to true, then only DDL that manipulates a captured table will be stored.

false

boolean

schemaNameAdjustmentMode (oracle)

Specify how schema names should be adjusted for compatibility with the message converter used by the connector, including: 'avro' replaces the characters that cannot be used in the Avro type name with underscore; 'avro_unicode' replaces the underscore or characters that cannot be used in the Avro type name with corresponding unicode like _uxxxx. Note: _ is an escape sequence like backslash in Java;'none' does not apply any adjustment (default).

none

String

signalDataCollection (oracle)

The name of the data collection that is used to send signals/commands to Debezium. Signaling is disabled when not set.

String

signalEnabledChannels (oracle)

List of channels names that are enabled. Source channel is enabled by default.

source

String

signalPollIntervalMs (oracle)

Interval for looking for new signals in registered channels, given in milliseconds. Defaults to 5 seconds.

5s

long

skippedOperations (oracle)

The comma-separated list of operations to skip during streaming, defined as: 'c' for inserts/create; 'u' for updates; 'd' for deletes, 't' for truncates, and 'none' to indicate nothing skipped. By default, only truncate operations will be skipped.

t

String

snapshotDelayMs (oracle)

A delay period before a snapshot will begin, given in milliseconds. Defaults to 0 ms.

0ms

long

snapshotEnhancePredicateScn (oracle)

A token to replace on snapshot predicate template.

String

snapshotFetchSize (oracle)

The maximum number of records that should be loaded into memory while performing a snapshot.

int

snapshotIncludeCollectionList (oracle)

This setting must be set to specify a list of tables/collections whose snapshot must be taken on creating or restarting the connector.

String

snapshotLockingMode (oracle)

Controls how the connector holds locks on tables while performing the schema snapshot. The default is 'shared', which means the connector will hold a table lock that prevents exclusive table access for just the initial portion of the snapshot while the database schemas and other metadata are being read. The remaining work in a snapshot involves selecting all rows from each table, and this is done using a flashback query that requires no locks. However, in some cases it may be desirable to avoid locks entirely which can be done by specifying 'none'. This mode is only safe to use if no schema changes are happening while the snapshot is taken.

shared

String

snapshotLockTimeoutMs (oracle)

The maximum number of millis to wait for table locks at the beginning of a snapshot. If locks cannot be acquired in this time frame, the snapshot will be aborted. Defaults to 10 seconds.

10s

long

snapshotMaxThreads (oracle)

The maximum number of threads used to perform the snapshot. Defaults to 1.

1

int

snapshotMode (oracle)

The criteria for running a snapshot upon startup of the connector. Select one of the following snapshot options: 'always': The connector runs a snapshot every time that it starts. After the snapshot completes, the connector begins to stream changes from the redo logs.; 'initial' (default): If the connector does not detect any offsets for the logical server name, it runs a snapshot that captures the current full state of the configured tables. After the snapshot completes, the connector begins to stream changes from the redo logs. 'initial_only': The connector performs a snapshot as it does for the 'initial' option, but after the connector completes the snapshot, it stops, and does not stream changes from the redo logs.; 'schema_only': If the connector does not detect any offsets for the logical server name, it runs a snapshot that captures only the schema (table structures), but not any table data. After the snapshot completes, the connector begins to stream changes from the redo logs.; 'schema_only_recovery': The connector performs a snapshot that captures only the database schema history. The connector then transitions to streaming from the redo logs. Use this setting to restore a corrupted or lost database schema history topic. Do not use if the database schema was modified after the connector stopped.

initial

String

snapshotSelectStatementOverrides (oracle)

This property contains a comma-separated list of fully-qualified tables (DB_NAME.TABLE_NAME) or (SCHEMA_NAME.TABLE_NAME), depending on the specific connectors. Select statements for the individual tables are specified in further configuration properties, one for each table, identified by the id 'snapshot.select.statement.overrides.DB_NAME.TABLE_NAME' or 'snapshot.select.statement.overrides.SCHEMA_NAME.TABLE_NAME', respectively. The value of those properties is the select statement to use when retrieving data from the specific table during snapshotting. A possible use case for large append-only tables is setting a specific point where to start (resume) snapshotting, in case a previous snapshotting was interrupted.

String

snapshotTablesOrderByRowCount (oracle)

Controls the order in which tables are processed in the initial snapshot. A descending value will order the tables by row count descending. A ascending value will order the tables by row count ascending. A value of disabled (the default) will disable ordering by row count.

disabled

String

sourceinfoStructMaker (oracle)

The name of the SourceInfoStructMaker class that returns SourceInfo schema and struct.

io.debezium.connector.oracle.OracleSourceInfoStructMaker

String

tableExcludeList (oracle)

A comma-separated list of regular expressions that match the fully-qualified names of tables to be excluded from monitoring.

String

tableIncludeList (oracle)

The tables for which changes are to be captured.

String

timePrecisionMode (oracle)

Time, date, and timestamps can be represented with different kinds of precisions, including: 'adaptive' (the default) bases the precision of time, date, and timestamp values on the database column’s precision; 'adaptive_time_microseconds' like 'adaptive' mode, but TIME fields always use microseconds precision; 'connect' always represents time, date, and timestamp values using Kafka Connect’s built-in representations for Time, Date, and Timestamp, which uses millisecond precision regardless of the database columns' precision.

adaptive

String

tombstonesOnDelete (oracle)

Whether delete operations should be represented by a delete event and a subsequent tombstone event (true) or only by a delete event (false). Emitting the tombstone event (the default behavior) allows Kafka to completely delete all events pertaining to the given key once the source record got deleted.

false

boolean

topicNamingStrategy (oracle)

The name of the TopicNamingStrategy class that should be used to determine the topic name for data change, schema change, transaction, heartbeat event etc.

io.debezium.schema.SchemaTopicNamingStrategy

String

topicPrefix (oracle)

Required Topic prefix that identifies and provides a namespace for the particular database server/cluster is capturing changes. The topic prefix should be unique across all other connectors, since it is used as a prefix for all Kafka topic names that receive events emitted by this connector. Only alphanumeric characters, hyphens, dots and underscores must be accepted.

String

unavailableValuePlaceholder (oracle)

Specify the constant that will be provided by Debezium to indicate that the original value is unavailable and not provided by the database.

__debezium_unavailable_value

String

For more information about configuration: https://debezium.io/documentation/reference/0.10/operations/embedded.html#engine-properties https://debezium.io/documentation/reference/0.10/connectors/oracleql.html#connector-properties

Message Headers

The Debezium Oracle Connector component supports 7 message header(s), which is/are listed below:

Name Description Default Type

CamelDebeziumSourceMetadata (consumer)

Constant: HEADER_SOURCE_METADATA

The metadata about the source event, for example table name, database name, log position, etc, please refer to the Debezium documentation for more info.

Map

CamelDebeziumIdentifier (consumer)

Constant: HEADER_IDENTIFIER

The identifier of the connector, normally is this format {server-name}.{database-name}.{table-name}.

String

CamelDebeziumKey (consumer)

Constant: HEADER_KEY

The key of the event, normally is the table Primary Key.

Struct

CamelDebeziumOperation (consumer)

Constant: HEADER_OPERATION

If presents, the type of event operation. Values for the connector are c for create (or insert), u for update, d for delete or r for read (in the case of a initial sync) or in case of a snapshot event.

String

CamelDebeziumTimestamp (consumer)

Constant: HEADER_TIMESTAMP

If presents, the time (using the system clock in the JVM) at which the connector processed the event.

Long

CamelDebeziumBefore (consumer)

Constant: HEADER_BEFORE

If presents, contains the state of the row before the event occurred.

Struct

CamelDebeziumDdlSQL (consumer)

Constant: HEADER_DDL_SQL

If presents, the ddl sql text of the event.

String

Message body

The message body if is not null (in case of tombstones), it contains the state of the row after the event occurred as Struct format or Map format if you use the included Type Converter from Struct to Map (please look below for more explanation).

Samples

Consuming events

Here is a very simple route that you can use in order to listen to Debezium events from oracle connector.

from("debezium-oracle:dbz-test-1?offsetStorageFileName=/usr/offset-file-1.dat&databaseHostname=localhost&databaseUser=debezium&databasePassword=dbz&databaseServerName=my-app-connector&databaseHistoryFileFilename=/usr/history-file-1.dat")
    .log("Event received from Debezium : ${body}")
    .log("    with this identifier ${headers.CamelDebeziumIdentifier}")
    .log("    with these source metadata ${headers.CamelDebeziumSourceMetadata}")
    .log("    the event occurred upon this operation '${headers.CamelDebeziumSourceOperation}'")
    .log("    on this database '${headers.CamelDebeziumSourceMetadata[db]}' and this table '${headers.CamelDebeziumSourceMetadata[table]}'")
    .log("    with the key ${headers.CamelDebeziumKey}")
    .log("    the previous value is ${headers.CamelDebeziumBefore}")

By default, the component will emit the events in the body and CamelDebeziumBefore header as Struct data type, the reasoning behind this, is to perceive the schema information in case is needed. However, the component as well contains a Type Converter that converts from default output type of Struct to Map in order to leverage Camel’s rich Data Format types which many of them work out of box with Map data type. To use it, you can either add Map.class type when you access the message e.g: exchange.getIn().getBody(Map.class), or you can convert the body always to Map from the route builder by adding .convertBodyTo(Map.class) to your Camel Route DSL after from statement.

We mentioned above about the schema, which can be used in case you need to perform advance data transformation and the schema is needed for that. If you choose not to convert your body to Map, you can obtain the schema information as Schema type from Struct like this:

from("debezium-oracle:[name]?[options]])
    .process(exchange -> {
        final Struct bodyValue = exchange.getIn().getBody(Struct.class);
        final Schema schemaValue = bodyValue.schema();

        log.info("Body value is : {}", bodyValue);
        log.info("With Schema : {}", schemaValue);
        log.info("And fields of : {}", schemaValue.fields());
        log.info("Field name has `{}` type", schemaValue.field("name").schema());
    });

Important Note: This component is a thin wrapper around Debezium Engine as mentioned, therefore before using this component in production, you need to understand how Debezium works and how configurations can reflect the expected behavior, especially in regards to handling failures.

Spring Boot Auto-Configuration

When using debezium-oracle with Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

<dependency>
  <groupId>org.apache.camel.springboot</groupId>
  <artifactId>camel-debezium-oracle-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 107 options, which are listed below.

Name Description Default Type

camel.component.debezium-oracle.additional-properties

Additional properties for debezium components in case they can’t be set directly on the camel configurations (e.g: setting Kafka Connect properties needed by Debezium engine, for example setting KafkaOffsetBackingStore), the properties have to be prefixed with additionalProperties.. E.g: additionalProperties.transactional.id=12345&additionalProperties.schema.registry.url=http://localhost:8811/avro.

Map

camel.component.debezium-oracle.autowired-enabled

Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc.

true

Boolean

camel.component.debezium-oracle.binary-handling-mode

Specify how binary (blob, binary, etc.) columns should be represented in change events, including: 'bytes' represents binary data as byte array (default); 'base64' represents binary data as base64-encoded string; 'base64-url-safe' represents binary data as base64-url-safe-encoded string; 'hex' represents binary data as hex-encoded (base16) string.

bytes

String

camel.component.debezium-oracle.bridge-error-handler

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

Boolean

camel.component.debezium-oracle.column-exclude-list

Regular expressions matching columns to exclude from change events.

String

camel.component.debezium-oracle.column-include-list

Regular expressions matching columns to include in change events.

String

camel.component.debezium-oracle.column-propagate-source-type

A comma-separated list of regular expressions matching fully-qualified names of columns that adds the columns original type and original length as parameters to the corresponding field schemas in the emitted change records.

String

camel.component.debezium-oracle.configuration

Allow pre-configured Configurations to be set. The option is a org.apache.camel.component.debezium.configuration.OracleConnectorEmbeddedDebeziumConfiguration type.

OracleConnectorEmbeddedDebeziumConfiguration

camel.component.debezium-oracle.converters

Optional list of custom converters that would be used instead of default ones. The converters are defined using '.type' config option and configured using options '.'.

String

camel.component.debezium-oracle.database-connection-adapter

The adapter to use when capturing changes from the database. Options include: 'logminer': (the default) to capture changes using native Oracle LogMiner; 'xstream' to capture changes using Oracle XStreams.

LogMiner

String

camel.component.debezium-oracle.database-dbname

The name of the database from which the connector should capture changes.

String

camel.component.debezium-oracle.database-hostname

Resolvable hostname or IP address of the database server.

String

camel.component.debezium-oracle.database-out-server-name

Name of the XStream Out server to connect to.

String

camel.component.debezium-oracle.database-password

Password of the database user to be used when connecting to the database.

String

camel.component.debezium-oracle.database-pdb-name

Name of the pluggable database when working with a multi-tenant set-up. The CDB name must be given via database.dbname in this case.

String

camel.component.debezium-oracle.database-port

Port of the database server.

1528

Integer

camel.component.debezium-oracle.database-url

Complete JDBC URL as an alternative to specifying hostname, port and database provided as a way to support alternative connection scenarios.

String

camel.component.debezium-oracle.database-user

Name of the database user to be used when connecting to the database.

String

camel.component.debezium-oracle.datatype-propagate-source-type

A comma-separated list of regular expressions matching the database-specific data type names that adds the data type’s original type and original length as parameters to the corresponding field schemas in the emitted change records.

String

camel.component.debezium-oracle.decimal-handling-mode

Specify how DECIMAL and NUMERIC columns should be represented in change events, including: 'precise' (the default) uses java.math.BigDecimal to represent values, which are encoded in the change events using a binary representation and Kafka Connect’s 'org.apache.kafka.connect.data.Decimal' type; 'string' uses string to represent values; 'double' represents values using Java’s 'double', which may not offer the precision but will be far easier to use in consumers.

precise

String

camel.component.debezium-oracle.enabled

Whether to enable auto configuration of the debezium-oracle component. This is enabled by default.

Boolean

camel.component.debezium-oracle.errors-max-retries

The maximum number of retries on connection errors before failing (-1 = no limit, 0 = disabled, 0 = num of retries).

-1

Integer

camel.component.debezium-oracle.event-processing-failure-handling-mode

Specify how failures during processing of events (i.e. when encountering a corrupted event) should be handled, including: 'fail' (the default) an exception indicating the problematic event and its position is raised, causing the connector to be stopped; 'warn' the problematic event and its position will be logged and the event will be skipped; 'ignore' the problematic event will be skipped.

fail

String

camel.component.debezium-oracle.heartbeat-action-query

The query executed with every heartbeat.

String

camel.component.debezium-oracle.heartbeat-interval-ms

Length of an interval in milli-seconds in in which the connector periodically sends heartbeat messages to a heartbeat topic. Use 0 to disable heartbeat messages. Disabled by default. The option is a int type.

0

Integer

camel.component.debezium-oracle.heartbeat-topics-prefix

The prefix that is used to name heartbeat topics.Defaults to __debezium-heartbeat.

__debezium-heartbeat

String

camel.component.debezium-oracle.include-schema-changes

Whether the connector should publish changes in the database schema to a Kafka topic with the same name as the database server ID. Each schema change will be recorded using a key that contains the database name and whose value include logical description of the new schema and optionally the DDL statement(s). The default is 'true'. This is independent of how the connector internally records database schema history.

true

Boolean

camel.component.debezium-oracle.include-schema-comments

Whether the connector parse table and column’s comment to metadata object. Note: Enable this option will bring the implications on memory usage. The number and size of ColumnImpl objects is what largely impacts how much memory is consumed by the Debezium connectors, and adding a String to each of them can potentially be quite heavy. The default is 'false'.

false

Boolean

camel.component.debezium-oracle.internal-key-converter

The Converter class that should be used to serialize and deserialize key data for offsets. The default is JSON converter.

org.apache.kafka.connect.json.JsonConverter

String

camel.component.debezium-oracle.internal-value-converter

The Converter class that should be used to serialize and deserialize value data for offsets. The default is JSON converter.

org.apache.kafka.connect.json.JsonConverter

String

camel.component.debezium-oracle.interval-handling-mode

Specify how INTERVAL columns should be represented in change events, including: 'string' represents values as an exact ISO formatted string; 'numeric' (default) represents values using the inexact conversion into microseconds.

numeric

String

camel.component.debezium-oracle.lob-enabled

When set to 'false', the default, LOB fields will not be captured nor emitted. When set to 'true', the connector will capture LOB fields and emit changes for those fields like any other column type.

false

Boolean

camel.component.debezium-oracle.log-mining-archive-destination-name

Sets the specific archive log destination as the source for reading archive logs.When not set, the connector will automatically select the first LOCAL and VALID destination.

String

camel.component.debezium-oracle.log-mining-archive-log-hours

The number of hours in the past from SYSDATE to mine archive logs. Using 0 mines all available archive logs.

0

Long

camel.component.debezium-oracle.log-mining-archive-log-only-mode

When set to 'false', the default, the connector will mine both archive log and redo logs to emit change events. When set to 'true', the connector will only mine archive logs. There are circumstances where its advantageous to only mine archive logs and accept latency in event emission due to frequent revolving redo logs.

false

Boolean

camel.component.debezium-oracle.log-mining-archive-log-only-scn-poll-interval-ms

The interval in milliseconds to wait between polls checking to see if the SCN is in the archive logs. The option is a long type.

10000

Long

camel.component.debezium-oracle.log-mining-batch-size-default

The starting SCN interval size that the connector will use for reading data from redo/archive logs.

20000

Long

camel.component.debezium-oracle.log-mining-batch-size-max

The maximum SCN interval size that this connector will use when reading from redo/archive logs.

100000

Long

camel.component.debezium-oracle.log-mining-batch-size-min

The minimum SCN interval size that this connector will try to read from redo/archive logs. Active batch size will be also increased/decreased by this amount for tuning connector throughput when needed.

1000

Long

camel.component.debezium-oracle.log-mining-buffer-drop-on-stop

When set to true the underlying buffer cache is not retained when the connector is stopped. When set to false (the default), the buffer cache is retained across restarts.

false

Boolean

camel.component.debezium-oracle.log-mining-buffer-infinispan-cache-events

Specifies the XML configuration for the Infinispan 'events' cache.

String

camel.component.debezium-oracle.log-mining-buffer-infinispan-cache-processed-transactions

Specifies the XML configuration for the Infinispan 'processed-transactions' cache.

String

camel.component.debezium-oracle.log-mining-buffer-infinispan-cache-schema-changes

Specifies the XML configuration for the Infinispan 'schema-changes' cache.

String

camel.component.debezium-oracle.log-mining-buffer-infinispan-cache-transactions

Specifies the XML configuration for the Infinispan 'transactions' cache.

String

camel.component.debezium-oracle.log-mining-buffer-transaction-events-threshold

The number of events a transaction can include before the transaction is discarded. This is useful for managing buffer memory and/or space when dealing with very large transactions. Defaults to 0, meaning that no threshold is applied and transactions can have unlimited events.

0

Long

camel.component.debezium-oracle.log-mining-buffer-type

The buffer type controls how the connector manages buffering transaction data. memory - Uses the JVM process' heap to buffer all transaction data. infinispan_embedded - This option uses an embedded Infinispan cache to buffer transaction data and persist it to disk. infinispan_remote - This option uses a remote Infinispan cluster to buffer transaction data and persist it to disk.

memory

String

camel.component.debezium-oracle.log-mining-flush-table-name

The name of the flush table used by the connector, defaults to LOG_MINING_FLUSH.

LOG_MINING_FLUSH

String

camel.component.debezium-oracle.log-mining-query-filter-mode

Specifies how the filter configuration is applied to the LogMiner database query. none - The query does not apply any schema or table filters, all filtering is at runtime by the connector. in - The query uses SQL in-clause expressions to specify the schema or table filters. regex - The query uses Oracle REGEXP_LIKE expressions to specify the schema or table filters.

none

String

camel.component.debezium-oracle.log-mining-restart-connection

Debezium opens a database connection and keeps that connection open throughout the entire streaming phase. In some situations, this can lead to excessive SGA memory usage. By setting this option to 'true' (the default is 'false'), the connector will close and re-open a database connection after every detected log switch or if the log.mining.session.max.ms has been reached.

false

Boolean

camel.component.debezium-oracle.log-mining-scn-gap-detection-gap-size-min

Used for SCN gap detection, if the difference between current SCN and previous end SCN is bigger than this value, and the time difference of current SCN and previous end SCN is smaller than log.mining.scn.gap.detection.time.interval.max.ms, consider it a SCN gap.

1000000

Long

camel.component.debezium-oracle.log-mining-scn-gap-detection-time-interval-max-ms

Used for SCN gap detection, if the difference between current SCN and previous end SCN is bigger than log.mining.scn.gap.detection.gap.size.min, and the time difference of current SCN and previous end SCN is smaller than this value, consider it a SCN gap. The option is a long type.

20000

Long

camel.component.debezium-oracle.log-mining-session-max-ms

The maximum number of milliseconds that a LogMiner session lives for before being restarted. Defaults to 0 (indefinite until a log switch occurs). The option is a long type.

0

Long

camel.component.debezium-oracle.log-mining-sleep-time-default-ms

The amount of time that the connector will sleep after reading data from redo/archive logs and before starting reading data again. Value is in milliseconds. The option is a long type.

1000

Long

camel.component.debezium-oracle.log-mining-sleep-time-increment-ms

The maximum amount of time that the connector will use to tune the optimal sleep time when reading data from LogMiner. Value is in milliseconds. The option is a long type.

200

Long

camel.component.debezium-oracle.log-mining-sleep-time-max-ms

The maximum amount of time that the connector will sleep after reading data from redo/archive logs and before starting reading data again. Value is in milliseconds. The option is a long type.

3000

Long

camel.component.debezium-oracle.log-mining-sleep-time-min-ms

The minimum amount of time that the connector will sleep after reading data from redo/archive logs and before starting reading data again. Value is in milliseconds. The option is a long type.

0

Long

camel.component.debezium-oracle.log-mining-strategy

There are strategies: Online catalog with faster mining but no captured DDL. Another - with data dictionary loaded into REDO LOG files.

redo_log_catalog

String

camel.component.debezium-oracle.log-mining-transaction-retention-ms

Duration in milliseconds to keep long running transactions in transaction buffer between log mining sessions. By default, all transactions are retained. The option is a long type.

0

Long

camel.component.debezium-oracle.log-mining-username-exclude-list

Comma separated list of usernames to exclude from LogMiner query.

String

camel.component.debezium-oracle.log-mining-username-include-list

Comma separated list of usernames to include from LogMiner query.

String

camel.component.debezium-oracle.max-batch-size

Maximum size of each batch of source records. Defaults to 2048.

2048

Integer

camel.component.debezium-oracle.max-queue-size

Maximum size of the queue for change events read from the database log but not yet recorded or forwarded. Defaults to 8192, and should always be larger than the maximum batch size.

8192

Integer

camel.component.debezium-oracle.max-queue-size-in-bytes

Maximum size of the queue in bytes for change events read from the database log but not yet recorded or forwarded. Defaults to 0. Mean the feature is not enabled.

0

Long

camel.component.debezium-oracle.message-key-columns

A semicolon-separated list of expressions that match fully-qualified tables and column(s) to be used as message key. Each expression must match the pattern ':', where the table names could be defined as (DB_NAME.TABLE_NAME) or (SCHEMA_NAME.TABLE_NAME), depending on the specific connector, and the key columns are a comma-separated list of columns representing the custom key. For any table without an explicit key configuration the table’s primary key column(s) will be used as message key. Example: dbserver1.inventory.orderlines:orderId,orderLineId;dbserver1.inventory.orders:id.

String

camel.component.debezium-oracle.notification-enabled-channels

List of notification channels names that are enabled.

String

camel.component.debezium-oracle.notification-sink-topic-name

The name of the topic for the notifications. This is required in case 'sink' is in the list of enabled channels.

String

camel.component.debezium-oracle.offset-commit-policy

The name of the Java class of the commit policy. It defines when offsets commit has to be triggered based on the number of events processed and the time elapsed since the last commit. This class must implement the interface 'OffsetCommitPolicy'. The default is a periodic commit policy based upon time intervals.

String

camel.component.debezium-oracle.offset-commit-timeout-ms

Maximum number of milliseconds to wait for records to flush and partition offset data to be committed to offset storage before cancelling the process and restoring the offset data to be committed in a future attempt. The default is 5 seconds. The option is a long type.

5000

Long

camel.component.debezium-oracle.offset-flush-interval-ms

Interval at which to try committing offsets. The default is 1 minute. The option is a long type.

60000

Long

camel.component.debezium-oracle.offset-storage

The name of the Java class that is responsible for persistence of connector offsets.

org.apache.kafka.connect.storage.FileOffsetBackingStore

String

camel.component.debezium-oracle.offset-storage-file-name

Path to file where offsets are to be stored. Required when offset.storage is set to the FileOffsetBackingStore.

String

camel.component.debezium-oracle.offset-storage-partitions

The number of partitions used when creating the offset storage topic. Required when offset.storage is set to the 'KafkaOffsetBackingStore'.

Integer

camel.component.debezium-oracle.offset-storage-replication-factor

Replication factor used when creating the offset storage topic. Required when offset.storage is set to the KafkaOffsetBackingStore.

Integer

camel.component.debezium-oracle.offset-storage-topic

The name of the Kafka topic where offsets are to be stored. Required when offset.storage is set to the KafkaOffsetBackingStore.

String

camel.component.debezium-oracle.poll-interval-ms

Time to wait for new change events to appear after receiving no events, given in milliseconds. Defaults to 500 ms. The option is a long type.

500

Long

camel.component.debezium-oracle.provide-transaction-metadata

Enables transaction metadata extraction together with event counting.

false

Boolean

camel.component.debezium-oracle.query-fetch-size

The maximum number of records that should be loaded into memory while streaming. A value of '0' uses the default JDBC fetch size, defaults to '2000'.

10000

Integer

camel.component.debezium-oracle.rac-nodes

A comma-separated list of RAC node hostnames or ip addresses.

String

camel.component.debezium-oracle.retriable-restart-connector-wait-ms

Time to wait before restarting connector after retriable exception occurs. Defaults to 10000ms. The option is a long type.

10000

Long

camel.component.debezium-oracle.schema-history-internal

The name of the SchemaHistory class that should be used to store and recover database schema changes. The configuration properties for the history are prefixed with the 'schema.history.internal.' string.

io.debezium.storage.kafka.history.KafkaSchemaHistory

String

camel.component.debezium-oracle.schema-history-internal-file-filename

The path to the file that will be used to record the database schema history.

String

camel.component.debezium-oracle.schema-history-internal-skip-unparseable-ddl

Controls the action Debezium will take when it meets a DDL statement in binlog, that it cannot parse.By default the connector will stop operating but by changing the setting it can ignore the statements which it cannot parse. If skipping is enabled then Debezium can miss metadata changes.

false

Boolean

camel.component.debezium-oracle.schema-history-internal-store-only-captured-databases-ddl

Controls what DDL will Debezium store in database schema history. By default (true) only DDL that manipulates a table from captured schema/database will be stored. If set to false, then Debezium will store all incoming DDL statements.

false

Boolean

camel.component.debezium-oracle.schema-history-internal-store-only-captured-tables-ddl

Controls what DDL will Debezium store in database schema history. By default (false) Debezium will store all incoming DDL statements. If set to true, then only DDL that manipulates a captured table will be stored.

false

Boolean

camel.component.debezium-oracle.schema-name-adjustment-mode

Specify how schema names should be adjusted for compatibility with the message converter used by the connector, including: 'avro' replaces the characters that cannot be used in the Avro type name with underscore; 'avro_unicode' replaces the underscore or characters that cannot be used in the Avro type name with corresponding unicode like _uxxxx. Note: _ is an escape sequence like backslash in Java;'none' does not apply any adjustment (default).

none

String

camel.component.debezium-oracle.signal-data-collection

The name of the data collection that is used to send signals/commands to Debezium. Signaling is disabled when not set.

String

camel.component.debezium-oracle.signal-enabled-channels

List of channels names that are enabled. Source channel is enabled by default.

source

String

camel.component.debezium-oracle.signal-poll-interval-ms

Interval for looking for new signals in registered channels, given in milliseconds. Defaults to 5 seconds. The option is a long type.

5000

Long

camel.component.debezium-oracle.skipped-operations

The comma-separated list of operations to skip during streaming, defined as: 'c' for inserts/create; 'u' for updates; 'd' for deletes, 't' for truncates, and 'none' to indicate nothing skipped. By default, only truncate operations will be skipped.

t

String

camel.component.debezium-oracle.snapshot-delay-ms

A delay period before a snapshot will begin, given in milliseconds. Defaults to 0 ms. The option is a long type.

0

Long

camel.component.debezium-oracle.snapshot-enhance-predicate-scn

A token to replace on snapshot predicate template.

String

camel.component.debezium-oracle.snapshot-fetch-size

The maximum number of records that should be loaded into memory while performing a snapshot.

Integer

camel.component.debezium-oracle.snapshot-include-collection-list

This setting must be set to specify a list of tables/collections whose snapshot must be taken on creating or restarting the connector.

String

camel.component.debezium-oracle.snapshot-lock-timeout-ms

The maximum number of millis to wait for table locks at the beginning of a snapshot. If locks cannot be acquired in this time frame, the snapshot will be aborted. Defaults to 10 seconds. The option is a long type.

10000

Long

camel.component.debezium-oracle.snapshot-locking-mode

Controls how the connector holds locks on tables while performing the schema snapshot. The default is 'shared', which means the connector will hold a table lock that prevents exclusive table access for just the initial portion of the snapshot while the database schemas and other metadata are being read. The remaining work in a snapshot involves selecting all rows from each table, and this is done using a flashback query that requires no locks. However, in some cases it may be desirable to avoid locks entirely which can be done by specifying 'none'. This mode is only safe to use if no schema changes are happening while the snapshot is taken.

shared

String

camel.component.debezium-oracle.snapshot-max-threads

The maximum number of threads used to perform the snapshot. Defaults to 1.

1

Integer

camel.component.debezium-oracle.snapshot-mode

The criteria for running a snapshot upon startup of the connector. Select one of the following snapshot options: 'always': The connector runs a snapshot every time that it starts. After the snapshot completes, the connector begins to stream changes from the redo logs.; 'initial' (default): If the connector does not detect any offsets for the logical server name, it runs a snapshot that captures the current full state of the configured tables. After the snapshot completes, the connector begins to stream changes from the redo logs. 'initial_only': The connector performs a snapshot as it does for the 'initial' option, but after the connector completes the snapshot, it stops, and does not stream changes from the redo logs.; 'schema_only': If the connector does not detect any offsets for the logical server name, it runs a snapshot that captures only the schema (table structures), but not any table data. After the snapshot completes, the connector begins to stream changes from the redo logs.; 'schema_only_recovery': The connector performs a snapshot that captures only the database schema history. The connector then transitions to streaming from the redo logs. Use this setting to restore a corrupted or lost database schema history topic. Do not use if the database schema was modified after the connector stopped.

initial

String

camel.component.debezium-oracle.snapshot-select-statement-overrides

This property contains a comma-separated list of fully-qualified tables (DB_NAME.TABLE_NAME) or (SCHEMA_NAME.TABLE_NAME), depending on the specific connectors. Select statements for the individual tables are specified in further configuration properties, one for each table, identified by the id 'snapshot.select.statement.overrides.DB_NAME.TABLE_NAME' or 'snapshot.select.statement.overrides.SCHEMA_NAME.TABLE_NAME', respectively. The value of those properties is the select statement to use when retrieving data from the specific table during snapshotting. A possible use case for large append-only tables is setting a specific point where to start (resume) snapshotting, in case a previous snapshotting was interrupted.

String

camel.component.debezium-oracle.snapshot-tables-order-by-row-count

Controls the order in which tables are processed in the initial snapshot. A descending value will order the tables by row count descending. A ascending value will order the tables by row count ascending. A value of disabled (the default) will disable ordering by row count.

disabled

String

camel.component.debezium-oracle.sourceinfo-struct-maker

The name of the SourceInfoStructMaker class that returns SourceInfo schema and struct.

io.debezium.connector.oracle.OracleSourceInfoStructMaker

String

camel.component.debezium-oracle.table-exclude-list

A comma-separated list of regular expressions that match the fully-qualified names of tables to be excluded from monitoring.

String

camel.component.debezium-oracle.table-include-list

The tables for which changes are to be captured.

String

camel.component.debezium-oracle.time-precision-mode

Time, date, and timestamps can be represented with different kinds of precisions, including: 'adaptive' (the default) bases the precision of time, date, and timestamp values on the database column’s precision; 'adaptive_time_microseconds' like 'adaptive' mode, but TIME fields always use microseconds precision; 'connect' always represents time, date, and timestamp values using Kafka Connect’s built-in representations for Time, Date, and Timestamp, which uses millisecond precision regardless of the database columns' precision.

adaptive

String

camel.component.debezium-oracle.tombstones-on-delete

Whether delete operations should be represented by a delete event and a subsequent tombstone event (true) or only by a delete event (false). Emitting the tombstone event (the default behavior) allows Kafka to completely delete all events pertaining to the given key once the source record got deleted.

false

Boolean

camel.component.debezium-oracle.topic-naming-strategy

The name of the TopicNamingStrategy class that should be used to determine the topic name for data change, schema change, transaction, heartbeat event etc.

io.debezium.schema.SchemaTopicNamingStrategy

String

camel.component.debezium-oracle.topic-prefix

Topic prefix that identifies and provides a namespace for the particular database server/cluster is capturing changes. The topic prefix should be unique across all other connectors, since it is used as a prefix for all Kafka topic names that receive events emitted by this connector. Only alphanumeric characters, hyphens, dots and underscores must be accepted.

String

camel.component.debezium-oracle.unavailable-value-placeholder

Specify the constant that will be provided by Debezium to indicate that the original value is unavailable and not provided by the database.

__debezium_unavailable_value

String
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