Package io.debezium.connector.postgresql.snapshot

Class QueryingSnapshotter

java.lang.Object

io.debezium.connector.postgresql.snapshot.QueryingSnapshotter

All Implemented Interfaces:

Snapshotter

Direct Known Subclasses:

AlwaysSnapshotter, InitialOnlySnapshotter, InitialSnapshotter

public abstract class QueryingSnapshotter
extends Object
implements Snapshotter

Constructor Summary

Constructors

Constructor	Description
QueryingSnapshotter()

Method Summary

Modifier and Type	Method	Description
Optional<String>	buildSnapshotQuery(TableId tableId, List<String> snapshotSelectColumns)	Generate a valid postgres query string for the specified table, or an empty Optional to skip snapshotting this table (but that table will still be streamed from)
void	init(PostgresConnectorConfig config, OffsetState sourceInfo, SlotState slotState)
Optional<String>	snapshotTableLockingStatement(Duration lockTimeout, Set<TableId> tableIds)	Returns a SQL statement for locking the given tables during snapshotting, if required by the specific snapshotter implementation.
String	snapshotTransactionIsolationLevelStatement(SlotCreationResult newSlotInfo)	Return a new string that set up the transaction for snapshotting

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.debezium.connector.postgresql.spi.Snapshotter

shouldSnapshot, shouldStream, shouldStreamEventsStartingFromSnapshot, snapshotCompleted

Constructor Details

QueryingSnapshotter

public QueryingSnapshotter()

Method Details

init

public void init(PostgresConnectorConfig config,
 OffsetState sourceInfo,
 SlotState slotState)

Specified by:

init in interface Snapshotter

buildSnapshotQuery

public Optional<String> buildSnapshotQuery(TableId tableId,
 List<String> snapshotSelectColumns)

Description copied from interface: Snapshotter

Generate a valid postgres query string for the specified table, or an empty Optional to skip snapshotting this table (but that table will still be streamed from)

Specified by:

buildSnapshotQuery in interface Snapshotter

Parameters:

tableId - the table to generate a query for

snapshotSelectColumns - the columns to be used in the snapshot select based on the column include/exclude filters

Returns:

a valid query string, or none to skip snapshotting this table

snapshotTableLockingStatement

public Optional<String> snapshotTableLockingStatement(Duration lockTimeout,
 Set<TableId> tableIds)

Description copied from interface: Snapshotter

Returns a SQL statement for locking the given tables during snapshotting, if required by the specific snapshotter implementation.

Specified by:

snapshotTableLockingStatement in interface Snapshotter

snapshotTransactionIsolationLevelStatement

public String snapshotTransactionIsolationLevelStatement(SlotCreationResult newSlotInfo)

Description copied from interface: Snapshotter

Return a new string that set up the transaction for snapshotting

Specified by:

snapshotTransactionIsolationLevelStatement in interface Snapshotter

Parameters:

newSlotInfo - if a new slot was created for snapshotting, this contains information from the `create_replication_slot` command