org.apache.flink.cdc.runtime.parser.metadata

Class TransformSqlReturnTypes

java.lang.Object

org.apache.flink.cdc.runtime.parser.metadata.TransformSqlReturnTypes

public class TransformSqlReturnTypes
extends Object

This is the return type definition of the call in the Transform expression, which references the class of FlinkReturnTypes in the Flink. In addition, its difference is that it is specifically referenced for FlinkCDC's Transform, and there may be new extensions here in the future.

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.calcite.sql.type.SqlReturnTypeInference	ARG0_VARCHAR_FORCE_NULLABLE Type-inference strategy whereby the result type of a call is the type of the operand #0 (0-based), with nulls always allowed.
static org.apache.calcite.sql.type.SqlReturnTypeInference	IF_NULLABLE Determine the return type of IF functions with arguments that has the least restrictive (eg: numeric, character, binary).
static org.apache.calcite.sql.type.SqlReturnTypeInference	NUMERIC_FROM_ARG1_DEFAULT1
static org.apache.calcite.sql.type.SqlReturnTypeInference	NUMERIC_FROM_ARG1_DEFAULT1_NULLABLE
static org.apache.calcite.sql.type.SqlReturnTypeInference	ROUND_FUNCTION ROUND(num [,len]) type inference.
static org.apache.calcite.sql.type.SqlReturnTypeInference	ROUND_FUNCTION_NULLABLE
static org.apache.calcite.sql.type.SqlReturnTypeInference	VARCHAR_FORCE_NULLABLE
static org.apache.calcite.sql.type.SqlReturnTypeInference	VARCHAR_NOT_NULL

Constructor Summary

Constructors

Constructor and Description
TransformSqlReturnTypes()

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

ROUND_FUNCTION

public static final org.apache.calcite.sql.type.SqlReturnTypeInference ROUND_FUNCTION

ROUND(num [,len]) type inference.

ARG0_VARCHAR_FORCE_NULLABLE

public static final org.apache.calcite.sql.type.SqlReturnTypeInference ARG0_VARCHAR_FORCE_NULLABLE

Type-inference strategy whereby the result type of a call is the type of the operand #0 (0-based), with nulls always allowed.

VARCHAR_FORCE_NULLABLE

public static final org.apache.calcite.sql.type.SqlReturnTypeInference VARCHAR_FORCE_NULLABLE

VARCHAR_NOT_NULL

public static final org.apache.calcite.sql.type.SqlReturnTypeInference VARCHAR_NOT_NULL

ROUND_FUNCTION_NULLABLE

public static final org.apache.calcite.sql.type.SqlReturnTypeInference ROUND_FUNCTION_NULLABLE

IF_NULLABLE

public static final org.apache.calcite.sql.type.SqlReturnTypeInference IF_NULLABLE

Determine the return type of IF functions with arguments that has the least restrictive (eg: numeric, character, binary). The return type is the type of the argument with the largest range. We start to consider the arguments from the first one. If one of the arguments is not of the type that has the least restrictive (eg: numeric, character, binary), we return the type of the first argument instead.

NUMERIC_FROM_ARG1_DEFAULT1

public static final org.apache.calcite.sql.type.SqlReturnTypeInference NUMERIC_FROM_ARG1_DEFAULT1

NUMERIC_FROM_ARG1_DEFAULT1_NULLABLE

public static final org.apache.calcite.sql.type.SqlReturnTypeInference NUMERIC_FROM_ARG1_DEFAULT1_NULLABLE

Constructor Detail

TransformSqlReturnTypes

public TransformSqlReturnTypes()