Package io.debezium.connector.postgresql.transforms.timescaledb

Class QueryInformationSchemaMetadata

java.lang.Object

io.debezium.connector.postgresql.transforms.timescaledb.AbstractTimescaleDbMetadata

io.debezium.connector.postgresql.transforms.timescaledb.QueryInformationSchemaMetadata

All Implemented Interfaces:

TimescaleDbMetadata, Closeable, AutoCloseable

public class QueryInformationSchemaMetadata
extends AbstractTimescaleDbMetadata

TimescaleDB metadata registry that performs out-of-band queries of TimescaleDB catalog to get the mappings between chunks, hypertables and aggregates.

Author:

Jiri Pechanec

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	CATALOG_SCHEMA
private final Map<TableId,TableId>	chunkToHypertable
private final PostgresConnection	connection
private final Map<TableId,TableId>	hypertableToAggregate
private static final org.slf4j.Logger	LOGGER
private static final String	QUERY_CHUNK_TO_HYPERTABLE
private static final String	QUERY_HYPERTABLE_TO_AGGREGATE

Constructor Summary

Constructors

Constructor	Description
QueryInformationSchemaMetadata(Configuration config)

Method Summary

Modifier and Type	Method	Description
Optional<TableId>	aggregateId(TableId hypertableId)	Returns the TableId that represents continuous aggregate view for which the hypertable is backend.
void	close()
Optional<TableId>	hypertableId(TableId chunkId)	Returns the TableId to which given chunk belong.
private void	loadTimescaleMetadata()

Methods inherited from class io.debezium.connector.postgresql.transforms.timescaledb.AbstractTimescaleDbMetadata

isTimescaleDbSchema

Methods inherited from class java.lang.Object

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

Field Details

CATALOG_SCHEMA

private static final String CATALOG_SCHEMA

See Also:

• Constant Field Values

QUERY_HYPERTABLE_TO_AGGREGATE

private static final String QUERY_HYPERTABLE_TO_AGGREGATE

QUERY_CHUNK_TO_HYPERTABLE

private static final String QUERY_CHUNK_TO_HYPERTABLE

LOGGER

private static final org.slf4j.Logger LOGGER

connection

private final PostgresConnection connection

chunkToHypertable

private final Map<TableId,TableId> chunkToHypertable

hypertableToAggregate

private final Map<TableId,TableId> hypertableToAggregate

Constructor Details

QueryInformationSchemaMetadata

public QueryInformationSchemaMetadata(Configuration config)

Method Details

hypertableId

public Optional<TableId> hypertableId(TableId chunkId)

Description copied from interface: TimescaleDbMetadata

Returns the TableId to which given chunk belong. Empty if this is not TimescaleDB chunk identifier. Resolution if the identifier is chunk or not is based on a preconfigured list of schemas.

aggregateId

public Optional<TableId> aggregateId(TableId hypertableId)

Description copied from interface: TimescaleDbMetadata

Returns the TableId that represents continuous aggregate view for which the hypertable is backend. Empty if hypertable is not associated with a continuous aggregate view.

close

public void close()
           throws IOException

Throws:

IOException

loadTimescaleMetadata

private void loadTimescaleMetadata()