public class SqlOverOperator extends SqlBinaryOperator
Operands are as follows:
SqlCall
)SqlLiteral
) or
window in-line specification (SqlWindow
)kind, MDX_PRECEDENCE, NL
Constructor and Description |
---|
SqlOverOperator() |
Modifier and Type | Method and Description |
---|---|
<R> void |
acceptCall(SqlVisitor<R> visitor,
SqlCall call,
boolean onlyExpressions,
SqlBasicVisitor.ArgHandler<R> argHandler)
Accepts a
SqlVisitor , and tells it to visit each child. |
RelDataType |
deriveType(SqlValidator validator,
SqlValidatorScope scope,
SqlCall call)
Derives the type of a call to this operator.
|
void |
validateCall(SqlCall call,
SqlValidator validator,
SqlValidatorScope scope,
SqlValidatorScope operandScope)
Validates a call to this operator.
|
adjustType, getMonotonicity, getSignatureTemplate, getSyntax, needsSpace, validRexOperands
acceptCall, allowsFraming, argumentMustBeScalar, checkOperandCount, checkOperandTypes, constructArgNameList, constructArgTypeList, constructOperandList, createCall, createCall, createCall, createCall, equals, getAllowedSignatures, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, getName, getNameAsId, getOperandCountRange, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, hashCode, inferReturnType, inferReturnType, isAggregator, isDeterministic, isDynamicFunction, isGroup, isGroupAuxiliary, isName, leftPrec, preValidateCall, requiresDecimalExpansion, requiresOrder, requiresOver, rewriteCall, rightPrec, toString, unparse, unparseListClause, unparseListClause, validateOperands
public void validateCall(SqlCall call, SqlValidator validator, SqlValidatorScope scope, SqlValidatorScope operandScope)
SqlOperator
This method should not perform type-derivation or perform validation
related related to types. That is done later, by
SqlOperator.deriveType(SqlValidator, SqlValidatorScope, SqlCall)
. This method
should focus on structural validation.
A typical implementation of this method first validates the operands, then performs some operator-specific logic. The default implementation just validates the operands.
This method is the default implementation of SqlCall.validate(org.apache.calcite.sql.validate.SqlValidator, org.apache.calcite.sql.validate.SqlValidatorScope)
;
but note that some sub-classes of SqlCall
never call this method.
validateCall
in class SqlOperator
call
- the call to this operatorvalidator
- the active validatorscope
- validator scopeoperandScope
- validator scope in which to validate operands to this
call; usually equal to scope, but not always because
some operators introduce new scopesSqlNode.validateExpr(SqlValidator, SqlValidatorScope)
,
SqlOperator.deriveType(SqlValidator, SqlValidatorScope, SqlCall)
public RelDataType deriveType(SqlValidator validator, SqlValidatorScope scope, SqlCall call)
SqlOperator
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.
deriveType
in class SqlBinaryOperator
validator
- Validatorscope
- Scope of validationcall
- Call to this operatorpublic <R> void acceptCall(SqlVisitor<R> visitor, SqlCall call, boolean onlyExpressions, SqlBasicVisitor.ArgHandler<R> argHandler)
SqlVisitor
, and tells it to visit each child.acceptCall
in class SqlOperator
visitor
- Visitorcall
- Call to visitonlyExpressions
- If true, ignores operands which are not
expressions. For example, in the call to the
AS
operatorargHandler
- Called for each operandCopyright © 2012–2019 The Apache Software Foundation. All rights reserved.