org.apache.calcite.sql.type

Interface SqlOperandTypeChecker

All Known Subinterfaces:

SqlSingleOperandTypeChecker

All Known Implementing Classes:

AssignableOperandTypeChecker, ComparableOperandTypeChecker, CompositeOperandTypeChecker, CompositeSingleOperandTypeChecker, FamilyOperandTypeChecker, LiteralOperandTypeChecker, MultisetOperandTypeChecker, SameOperandTypeChecker, SetopOperandTypeChecker

public interface SqlOperandTypeChecker

Strategy interface to check for allowed operand types of an operator call.

This interface is an example of the strategy pattern.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	SqlOperandTypeChecker.Consistency Strategy used to make arguments consistent.

Method Summary

Methods

Modifier and Type	Method and 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.
SqlOperandTypeChecker.Consistency	getConsistency() Returns the strategy for making the arguments have consistency types.
SqlOperandCountRange	getOperandCountRange()

Method Detail

checkOperandTypes

boolean checkOperandTypes(SqlCallBinding callBinding,
                        boolean throwOnFailure)

Checks the types of all operands to an operator call.

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

SqlOperandCountRange getOperandCountRange()

Returns:

range of operand counts allowed in a call

getAllowedSignatures

String getAllowedSignatures(SqlOperator op,
                          String opName)

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

Parameters:

op - the operator being checked

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

Returns:

generated string

getConsistency

SqlOperandTypeChecker.Consistency getConsistency()

Returns the strategy for making the arguments have consistency types.