Package org.apache.calcite.sql.fun
Class SqlCursorConstructor
- 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.SqlCursorConstructor
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public class SqlCursorConstructor extends SqlSpecialOperator
SqlCursorConstructor defines the non-standard CURSOR(<query>) constructor.
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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 SqlCursorConstructor()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
argumentMustBeScalar(int ordinal)
Returns whether theordinal
th argument to this operator must be scalar (as opposed to a query).RelDataType
deriveType(SqlValidator validator, SqlValidatorScope scope, SqlCall call)
Derives the type of a call to this operator.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
getSyntax, reduceExpr
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Methods inherited from class org.apache.calcite.sql.SqlOperator
acceptCall, acceptCall, adjustType, allowsFraming, checkOperandCount, checkOperandTypes, constructArgNameList, constructArgTypeList, constructOperandList, createCall, createCall, createCall, createCall, equals, getAllowedSignatures, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, 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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deriveType
public RelDataType deriveType(SqlValidator validator, SqlValidatorScope scope, SqlCall call)
Description copied from class:SqlOperator
Derives the type of a call to this operator.This method is an intrinsic part of the validation process so, unlike
SqlOperator.inferReturnType(org.apache.calcite.sql.SqlOperatorBinding)
, specific operators would not typically override this method.- Overrides:
deriveType
in classSqlOperator
- Parameters:
validator
- Validatorscope
- Scope of validationcall
- Call to this operator- Returns:
- Type of call
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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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argumentMustBeScalar
public boolean argumentMustBeScalar(int ordinal)
Description copied from class:SqlOperator
Returns whether theordinal
th argument to this operator must be scalar (as opposed to a query).If true (the default), the validator will attempt to convert the argument into a scalar sub-query, which must have one column and return at most one row.
Operators such as
SELECT
andEXISTS
override this method.- Overrides:
argumentMustBeScalar
in classSqlOperator
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