Package org.apache.calcite.sql.type

Class SetopOperandTypeChecker

java.lang.Object

org.apache.calcite.sql.type.SetopOperandTypeChecker

All Implemented Interfaces:

SqlOperandTypeChecker

public class SetopOperandTypeChecker
extends Object
implements SqlOperandTypeChecker

Parameter type-checking strategy for a set operator (UNION, INTERSECT, EXCEPT).

Both arguments must be records with the same number of fields, and the fields must be union-compatible.

Nested Class Summary

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

SqlOperandTypeChecker.Consistency

Constructor Summary

Constructors

Constructor	Description
SetopOperandTypeChecker()

Method Summary

Modifier and Type	Method	Description
boolean	checkOperandTypes(SqlCallBinding callBinding, boolean throwOnFailure)	Checks the types of all operands to an operator call.
String	getAllowedSignatures(SqlOperator op, String opName)	Returns a string describing the allowed formal signatures of a call, e.g.
SqlOperandCountRange	getOperandCountRange()	Returns the range of operand counts allowed in a call.

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

and, getConsistency, isFixedParameters, isOptional, or, typeInference, withGenerator

Constructor Details

SetopOperandTypeChecker

public SetopOperandTypeChecker()

Method Details

checkOperandTypes

public boolean checkOperandTypes(SqlCallBinding callBinding,
 boolean throwOnFailure)

Description copied from interface: SqlOperandTypeChecker

Checks the types of all operands to an operator call.

Specified by:

checkOperandTypes in interface SqlOperandTypeChecker

Parameters:

callBinding - description of the call to be checked

throwOnFailure - whether to throw an exception if check fails (otherwise returns false in that case)

Returns:

whether check succeeded

getOperandCountRange

public SqlOperandCountRange getOperandCountRange()

Description copied from interface: SqlOperandTypeChecker

Returns the range of operand counts allowed in a call.

Specified by:

getOperandCountRange in interface SqlOperandTypeChecker

getAllowedSignatures

public String getAllowedSignatures(SqlOperator op,
 String opName)

Description copied from interface: SqlOperandTypeChecker

Returns a string describing the allowed formal signatures of a call, e.g. "SUBSTR(VARCHAR, INTEGER, INTEGER)".

Specified by:

getAllowedSignatures in interface SqlOperandTypeChecker

Parameters:

op - the operator being checked

opName - name to use for the operator in case of aliasing

Returns:

generated string