public class SameOperandTypeChecker extends java.lang.Object implements SqlSingleOperandTypeChecker
SqlOperandTypeChecker.Consistency
Modifier and Type | Field and Description |
---|---|
protected int |
nOperands |
Constructor and Description |
---|
SameOperandTypeChecker(int nOperands) |
Modifier and Type | Method and Description |
---|---|
boolean |
checkOperandTypes(SqlCallBinding callBinding,
boolean throwOnFailure)
Checks the types of all operands to an operator call.
|
boolean |
checkOperandTypes(SqlOperatorBinding operatorBinding)
Similar functionality to
checkOperandTypes(SqlCallBinding, boolean) , but not part of the
interface, and cannot throw an error. |
protected boolean |
checkOperandTypesImpl(SqlOperatorBinding operatorBinding,
boolean throwOnFailure,
SqlCallBinding callBinding) |
boolean |
checkSingleOperandType(SqlCallBinding callBinding,
SqlNode operand,
int iFormalOperand,
boolean throwOnFailure)
Checks the type of a single operand against a particular ordinal position
within a formal operator signature.
|
java.lang.String |
getAllowedSignatures(SqlOperator op,
java.lang.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() |
protected java.util.List<java.lang.Integer> |
getOperandList(int operandCount) |
protected java.lang.String |
getTypeName()
Override to change the behavior of
getAllowedSignatures(SqlOperator, String) . |
boolean |
isOptional(int i)
Returns whether the
i th operand is optional. |
public SqlOperandTypeChecker.Consistency getConsistency()
SqlOperandTypeChecker
getConsistency
in interface SqlOperandTypeChecker
public boolean isOptional(int i)
SqlOperandTypeChecker
i
th operand is optional.isOptional
in interface SqlOperandTypeChecker
public boolean checkOperandTypes(SqlCallBinding callBinding, boolean throwOnFailure)
SqlOperandTypeChecker
checkOperandTypes
in interface SqlOperandTypeChecker
callBinding
- description of the call to be checkedthrowOnFailure
- whether to throw an exception if check fails
(otherwise returns false in that case)protected java.util.List<java.lang.Integer> getOperandList(int operandCount)
protected boolean checkOperandTypesImpl(SqlOperatorBinding operatorBinding, boolean throwOnFailure, SqlCallBinding callBinding)
public boolean checkOperandTypes(SqlOperatorBinding operatorBinding)
checkOperandTypes(SqlCallBinding, boolean)
, but not part of the
interface, and cannot throw an error.public SqlOperandCountRange getOperandCountRange()
getOperandCountRange
in interface SqlOperandTypeChecker
public java.lang.String getAllowedSignatures(SqlOperator op, java.lang.String opName)
SqlOperandTypeChecker
getAllowedSignatures
in interface SqlOperandTypeChecker
op
- the operator being checkedopName
- name to use for the operator in case of aliasingprotected java.lang.String getTypeName()
getAllowedSignatures(SqlOperator, String)
.public boolean checkSingleOperandType(SqlCallBinding callBinding, SqlNode operand, int iFormalOperand, boolean throwOnFailure)
SqlSingleOperandTypeChecker
For example, when validating the actual call
C(X, Y, Z)
the strategy for validating the operand Z might involve checking its
type against the formal signature OP(W). In this case,
iFormalOperand
would be zero, even though the position of Z
within call C is two.
checkSingleOperandType
in interface SqlSingleOperandTypeChecker
callBinding
- description of the call being checked; this is only
provided for context when throwing an exception; the
implementation should NOT examine the
operands of the call as part of the checkoperand
- the actual operand to be checkediFormalOperand
- the 0-based formal operand ordinalthrowOnFailure
- whether to throw an exception if check fails
(otherwise returns false in that case)Copyright © 2012–2019 The Apache Software Foundation. All rights reserved.