Package org.apache.flink.table.planner.plan.type

Class FlinkReturnTypes

java.lang.Object

org.apache.flink.table.planner.plan.type.FlinkReturnTypes

public class FlinkReturnTypes
extends Object

Type inference in Flink.

Field Summary

Fields

Modifier and Type	Field	Description
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.
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).
static final org.apache.calcite.sql.type.SqlReturnTypeInference	ROUND_FUNCTION	ROUND(num [,len]) type inference.
static final org.apache.calcite.sql.type.SqlReturnTypeInference	ROUND_FUNCTION_NULLABLE
static final org.apache.calcite.sql.type.SqlReturnTypeInference	STR_MAP_NULLABLE
static final org.apache.calcite.sql.type.SqlReturnTypeInference	VARCHAR_FORCE_NULLABLE
static final org.apache.calcite.sql.type.SqlReturnTypeInference	VARCHAR_NOT_NULL

Constructor Summary

Constructors

Constructor	Description
FlinkReturnTypes()

Method Summary

Methods inherited from class java.lang.Object

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

Field Details

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.

STR_MAP_NULLABLE

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

Constructor Details

FlinkReturnTypes

public FlinkReturnTypes()