Package org.apache.calcite.sql.fun
Class SqlDatetimeSubtractionOperator
- java.lang.Object
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- org.apache.calcite.sql.SqlOperator
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- org.apache.calcite.sql.SqlSpecialOperator
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- org.apache.calcite.sql.fun.SqlDatetimeSubtractionOperator
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public class SqlDatetimeSubtractionOperator extends SqlSpecialOperator
A special operator for the subtraction of two DATETIMEs. The format of DATETIME subtraction is:"(" <datetime> "-" <datetime> ")" <interval qualifier>
This operator is special since it needs to hold the additional interval qualifier specification, when in
SqlCall
form. InRexNode
form, it has only two parameters, and the return type describes the desired type of interval.
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.calcite.sql.SqlSpecialOperator
SqlSpecialOperator.ReduceResult, SqlSpecialOperator.TokenSequence
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Field Summary
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Fields inherited from class org.apache.calcite.sql.SqlOperator
kind, MDX_PRECEDENCE, NL
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Constructor Summary
Constructors Constructor Description SqlDatetimeSubtractionOperator()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description SqlMonotonicity
getMonotonicity(SqlOperatorBinding call)
Returns whether a call to this operator is monotonic.SqlSyntax
getSyntax()
Returns the syntactic type of this operator, never null.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.-
Methods inherited from class org.apache.calcite.sql.SqlSpecialOperator
reduceExpr
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Methods inherited from class org.apache.calcite.sql.SqlOperator
acceptCall, acceptCall, adjustType, allowsFraming, argumentMustBeScalar, checkOperandCount, checkOperandTypes, constructArgNameList, constructArgTypeList, constructOperandList, createCall, createCall, createCall, createCall, deriveType, equals, getAllowedSignatures, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, getName, getNameAsId, getOperandCountRange, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, getSignatureTemplate, hashCode, inferReturnType, inferReturnType, isAggregator, isDeterministic, isDynamicFunction, isGroup, isGroupAuxiliary, isName, leftPrec, preValidateCall, requiresDecimalExpansion, requiresOrder, requiresOver, rewriteCall, rightPrec, toString, unparseListClause, unparseListClause, validateCall, validateOperands, validRexOperands
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Method Detail
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getSyntax
public SqlSyntax getSyntax()
Description copied from class:SqlOperator
Returns the syntactic type of this operator, never null.- Overrides:
getSyntax
in classSqlSpecialOperator
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unparse
public void unparse(SqlWriter writer, SqlCall call, int leftPrec, int rightPrec)
Description copied from class:SqlOperator
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.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)
.- Overrides:
unparse
in classSqlOperator
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getMonotonicity
public SqlMonotonicity getMonotonicity(SqlOperatorBinding call)
Description copied from class:SqlOperator
Returns whether a call to this operator is monotonic.Default implementation returns
SqlMonotonicity.NOT_MONOTONIC
.- Overrides:
getMonotonicity
in classSqlOperator
- Parameters:
call
- Call to this operator with particular arguments and information about the monotonicity of the arguments
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