Package org.apache.calcite.sql.fun
Class SqlMultisetQueryConstructor
- java.lang.Object
-
- org.apache.calcite.sql.SqlOperator
-
- org.apache.calcite.sql.SqlSpecialOperator
-
- org.apache.calcite.sql.fun.SqlMultisetQueryConstructor
-
- Direct Known Subclasses:
SqlArrayQueryConstructor
,SqlMapQueryConstructor
public class SqlMultisetQueryConstructor extends SqlSpecialOperator
Definition of the SQL:2003 standard MULTISET query constructor,MULTISET (<query>)
.- See Also:
SqlMultisetValueConstructor
-
-
Nested Class Summary
-
Nested classes/interfaces inherited from class org.apache.calcite.sql.SqlSpecialOperator
SqlSpecialOperator.ReduceResult, SqlSpecialOperator.TokenSequence
-
-
Field Summary
-
Fields inherited from class org.apache.calcite.sql.SqlOperator
kind, MDX_PRECEDENCE, NL
-
-
Constructor Summary
Constructors Modifier Constructor Description SqlMultisetQueryConstructor()
protected
SqlMultisetQueryConstructor(java.lang.String name, SqlKind kind)
-
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).boolean
checkOperandTypes(SqlCallBinding callBinding, boolean throwOnFailure)
Checks that the operand values in aSqlCall
to this operator are valid.RelDataType
deriveType(SqlValidator validator, SqlValidatorScope scope, SqlCall call)
Derives the type of a call to this operator.private RelDataType
getComponentType(RelDataTypeFactory typeFactory, java.util.List<RelDataType> argTypes)
RelDataType
inferReturnType(SqlOperatorBinding opBinding)
Infers the return type of an invocation of this operator; only called after the number and types of operands have already been validated.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
-
Methods inherited from class org.apache.calcite.sql.SqlOperator
acceptCall, acceptCall, adjustType, allowsFraming, checkOperandCount, constructArgNameList, constructArgTypeList, constructOperandList, createCall, createCall, createCall, createCall, equals, getAllowedSignatures, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, getMonotonicity, getName, getNameAsId, getOperandCountRange, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, getSignatureTemplate, hashCode, inferReturnType, isAggregator, isDeterministic, isDynamicFunction, isGroup, isGroupAuxiliary, isName, leftPrec, preValidateCall, requiresDecimalExpansion, requiresOrder, requiresOver, rewriteCall, rightPrec, toString, unparseListClause, unparseListClause, validateCall, validateOperands, validRexOperands
-
-
-
-
Constructor Detail
-
SqlMultisetQueryConstructor
public SqlMultisetQueryConstructor()
-
SqlMultisetQueryConstructor
protected SqlMultisetQueryConstructor(java.lang.String name, SqlKind kind)
-
-
Method Detail
-
inferReturnType
public RelDataType inferReturnType(SqlOperatorBinding opBinding)
Description copied from class:SqlOperator
Infers the return type of an invocation of this operator; only called after the number and types of operands have already been validated. Subclasses must either override this method or supply an instance ofSqlReturnTypeInference
to the constructor.- Overrides:
inferReturnType
in classSqlOperator
- Parameters:
opBinding
- description of invocation (not necessarily aSqlCall
)- Returns:
- inferred return type
-
getComponentType
private RelDataType getComponentType(RelDataTypeFactory typeFactory, java.util.List<RelDataType> argTypes)
-
checkOperandTypes
public boolean checkOperandTypes(SqlCallBinding callBinding, boolean throwOnFailure)
Description copied from class:SqlOperator
Checks that the operand values in aSqlCall
to this operator are valid. Subclasses must either override this method or supply an instance ofSqlOperandTypeChecker
to the constructor.- Overrides:
checkOperandTypes
in classSqlOperator
- Parameters:
callBinding
- description of callthrowOnFailure
- whether to throw an exception if check fails (otherwise returns false in that case)- Returns:
- whether check succeeded
-
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
-
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
-
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
-
-