public class SqlSubstringFunction extends SqlFunction
kind, MDX_PRECEDENCE, NL
Constructor and Description |
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SqlSubstringFunction()
Creates the SqlSubstringFunction.
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Modifier and Type | Method and Description |
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boolean |
checkOperandTypes(SqlCallBinding callBinding,
boolean throwOnFailure)
Checks that the operand values in a
SqlCall to this operator are
valid. |
java.lang.String |
getAllowedSignatures(java.lang.String opName)
Returns a string describing the expected operand types of a call, e.g.
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SqlMonotonicity |
getMonotonicity(SqlOperatorBinding call)
Returns whether a call to this operator is monotonic.
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SqlOperandCountRange |
getOperandCountRange()
Returns a constraint on the number of operands expected by this operator.
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java.lang.String |
getSignatureTemplate(int operandsCount)
Returns a template describing how the operator signature is to be built.
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void |
unparse(SqlWriter writer,
SqlCall call,
int leftPrec,
int rightPrec)
Writes a SQL representation of a call to this operator to a writer,
including parentheses if the operators on either side are of greater
precedence.
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deriveType, getFunctionType, getNameAsId, getParamNames, getParamTypes, getSqlIdentifier, getSyntax, isQuantifierAllowed, validateCall, validateQuantifier
acceptCall, acceptCall, adjustType, allowsFraming, argumentMustBeScalar, checkOperandCount, constructArgNameList, constructArgTypeList, constructOperandList, createCall, createCall, createCall, createCall, equals, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, getName, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, hashCode, inferReturnType, inferReturnType, isAggregator, isDeterministic, isDynamicFunction, isGroup, isGroupAuxiliary, isName, leftPrec, preValidateCall, requiresDecimalExpansion, requiresOrder, requiresOver, rewriteCall, rightPrec, toString, unparseListClause, unparseListClause, validateOperands, validRexOperands
public java.lang.String getSignatureTemplate(int operandsCount)
SqlOperator
getSignatureTemplate
in class SqlOperator
operandsCount
- is used with functions that can take a variable
number of operandspublic java.lang.String getAllowedSignatures(java.lang.String opName)
SqlOperator
getAllowedSignatures
in class SqlOperator
public boolean checkOperandTypes(SqlCallBinding callBinding, boolean throwOnFailure)
SqlOperator
SqlCall
to this operator are
valid. Subclasses must either override this method or supply an instance
of SqlOperandTypeChecker
to the constructor.checkOperandTypes
in class SqlOperator
callBinding
- description of callthrowOnFailure
- whether to throw an exception if check fails
(otherwise returns false in that case)public SqlOperandCountRange getOperandCountRange()
SqlOperator
SqlOperandTypeChecker
associated with this
operator.getOperandCountRange
in class SqlOperator
public void unparse(SqlWriter writer, SqlCall call, int leftPrec, int rightPrec)
SqlOperator
The default implementation of this method delegates to
SqlSyntax.unparse(org.apache.calcite.sql.SqlWriter, org.apache.calcite.sql.SqlOperator, org.apache.calcite.sql.SqlCall, int, int)
.
unparse
in class SqlFunction
public SqlMonotonicity getMonotonicity(SqlOperatorBinding call)
SqlOperator
Default implementation returns SqlMonotonicity.NOT_MONOTONIC
.
getMonotonicity
in class SqlOperator
call
- Call to this operator with particular arguments and information
about the monotonicity of the argumentsCopyright © 2012–2019 The Apache Software Foundation. All rights reserved.