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DESCRIBE DETAIL TABLE output:

name

type

description

name

String

catalog.database.tableName

log.kafka.bootstrap.servers

Map

Kafka brokers

log.retention

Duration

how long changes log will be kept

file.path

String

File path

log.kafka.topic

String

topic of Kafka

watermark

Timestamp

Watermark of the latest written data (If table defines watermark)

file.format

String

format for file

bucket

Integer

bucket number

change-tracking

Boolean

does this table tracking changes

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We put necessary configurations in the global configuration to avoid the need for users to configure each individual table.

If users need to configure a table separately, users can also configure it through options.

Key

Default

Type

Description

table-storage.log.systemkafkaStringLog system.

table-storage.log.kafka.bootstrap.servers

(none)

Map

Kafka brokers. eg: localhost:9092

table-storage.log.retention

(none)

Duration

It means how long changes log will be kept. The default value is from the log system cluster.

table-storage.log.scanfullString

Specifies the scan startup mode for log consumer.

  • full: Performs a snapshot on the table upon first startup, and continue to read the latest changes. (Using HybridSource, the switching between snapshot and changes is exactly-once consistency because we store the offset of the corresponding log to snapshot when writing data)
  • latest: Start from the latest.
  • from-timestamp: Start from user-supplied timestamp.
table-storage.log.pk.consistencytransactionalString

Specifies the log consistency mode for table with primary key.

  • transactional: only the data after the checkpoint can be seen by readers, the latency depends on checkpoint interval
  • eventual: Immediate data visibility, you may see some intermediate states, but eventually the right results will be produced
table-storage.log.pk.changelog-modeupsertString

Specifies the log changelog mode for table with primary key.

  • upsert: the log system does not store the UPDATE_BEFORE changes, the log consumed job will automatically add the normalized node, relying on the state to generate the required update_before.
  • all: the log system stores all changes including UPDATE_BEFORE
table-storage.log.pk.key-formatjsonStringSpecifies the key message format of log system with primary key.
table-storage.log.formatdebezium-jsonStringSpecifies the message format of log system.

table-storage.file.root-path

(none)

String

Root file path.

table-storage.file.format

parquet

String

Format name for file.

table-storage.bucket

1

Integer

Bucket number for file and Partition number for Kafka.

table-storage.change-trackingtrueBooleanIf users do not need to consume changes from the table, they can disable Change Tracking. This can reduce resource consumption.

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