org.apache.calcite.sql.type

Class OperandMetadataImpl

java.lang.Object

org.apache.calcite.sql.type.FamilyOperandTypeChecker

org.apache.calcite.sql.type.OperandMetadataImpl

All Implemented Interfaces:

ImplicitCastOperandTypeChecker, SqlOperandMetadata, SqlOperandTypeChecker, SqlSingleOperandTypeChecker

public class OperandMetadataImpl
extends FamilyOperandTypeChecker
implements SqlOperandMetadata

Operand type-checking strategy user-defined functions (including user-defined aggregate functions, table functions, and table macros).

UDFs have a fixed number of parameters is fixed. Per SqlOperandMetadata, this interface provides the name and types of each parameter.

See Also:

OperandTypes.operandMetadata(java.util.List<org.apache.calcite.sql.type.SqlTypeFamily>, java.util.function.Function<org.apache.calcite.rel.type.RelDataTypeFactory, java.util.List<org.apache.calcite.rel.type.RelDataType>>, java.util.function.IntFunction<java.lang.String>, java.util.function.Predicate<java.lang.Integer>)

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.calcite.sql.type.SqlOperandTypeChecker

SqlOperandTypeChecker.Consistency

Field Summary

Fields inherited from class org.apache.calcite.sql.type.FamilyOperandTypeChecker

families, optional

Method Summary

Modifier and Type	Method and Description
boolean	isFixedParameters() Returns whether the list of parameters is fixed-length.
List<String>	paramNames() Returns the names of the parameters.
List<RelDataType>	paramTypes(RelDataTypeFactory typeFactory) Returns the types of the parameters.

Methods inherited from class org.apache.calcite.sql.type.FamilyOperandTypeChecker

checkOperandTypes, checkOperandTypesWithoutTypeCoercion, checkSingleOperandType, getAllowedSignatures, getConsistency, getOperandCountRange, getOperandSqlTypeFamily, isOptional

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.sql.type.SqlOperandTypeChecker

checkOperandTypes, getAllowedSignatures, getConsistency, getOperandCountRange, isOptional, typeInference

Method Detail

isFixedParameters

public boolean isFixedParameters()

Description copied from interface: SqlOperandTypeChecker

Returns whether the list of parameters is fixed-length. In standard SQL, user-defined functions are fixed-length.

If true, the validator should expand calls, supplying a DEFAULT value for each parameter for which an argument is not supplied.

Specified by:

isFixedParameters in interface SqlOperandTypeChecker

paramTypes

public List<RelDataType> paramTypes(RelDataTypeFactory typeFactory)

Description copied from interface: SqlOperandMetadata

Returns the types of the parameters.

Specified by:

paramTypes in interface SqlOperandMetadata

paramNames

public List<String> paramNames()

Description copied from interface: SqlOperandMetadata

Returns the names of the parameters.

Specified by:

paramNames in interface SqlOperandMetadata