org.apache.flink.table.planner.sinks

Class DynamicSinkUtils

java.lang.Object

org.apache.flink.table.planner.sinks.DynamicSinkUtils

@Internal
public final class DynamicSinkUtils
extends Object

Utilities for dealing with DynamicTableSink.

Method Summary

Modifier and Type	Method and Description
static org.apache.calcite.rel.RelNode	toRel(org.apache.flink.table.planner.calcite.FlinkRelBuilder relBuilder, org.apache.calcite.rel.RelNode input, org.apache.flink.table.operations.CatalogSinkModifyOperation sinkOperation, org.apache.flink.table.connector.sink.DynamicTableSink sink, org.apache.flink.table.catalog.CatalogTable table) Similar to CatalogSourceTable.toRel(RelOptTable.ToRelContext), converts a given DynamicTableSink to a RelNode.
static org.apache.calcite.rel.RelNode	validateSchemaAndApplyImplicitCast(org.apache.calcite.rel.RelNode query, org.apache.flink.table.api.TableSchema sinkSchema, org.apache.flink.table.catalog.ObjectIdentifier sinkIdentifier, org.apache.flink.table.planner.calcite.FlinkTypeFactory typeFactory) Checks if the given query can be written into the given sink's table schema.

Methods inherited from class java.lang.Object

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

Method Detail

toRel

public static org.apache.calcite.rel.RelNode toRel(org.apache.flink.table.planner.calcite.FlinkRelBuilder relBuilder,
                                                   org.apache.calcite.rel.RelNode input,
                                                   org.apache.flink.table.operations.CatalogSinkModifyOperation sinkOperation,
                                                   org.apache.flink.table.connector.sink.DynamicTableSink sink,
                                                   org.apache.flink.table.catalog.CatalogTable table)

Similar to CatalogSourceTable.toRel(RelOptTable.ToRelContext), converts a given DynamicTableSink to a RelNode. It adds helper projections if necessary.

validateSchemaAndApplyImplicitCast

public static org.apache.calcite.rel.RelNode validateSchemaAndApplyImplicitCast(org.apache.calcite.rel.RelNode query,
                                                                                org.apache.flink.table.api.TableSchema sinkSchema,
                                                                                @Nullable
                                                                                org.apache.flink.table.catalog.ObjectIdentifier sinkIdentifier,
                                                                                org.apache.flink.table.planner.calcite.FlinkTypeFactory typeFactory)

Checks if the given query can be written into the given sink's table schema.

It checks whether field types are compatible (types should be equal including precisions). If types are not compatible, but can be implicitly cast, a cast projection will be applied. Otherwise, an exception will be thrown.