public static class SqlMatchRecognize.SqlMatchRecognizeOperator extends SqlOperator
Modifier and Type | Field and Description |
---|---|
static SqlMatchRecognize.SqlMatchRecognizeOperator |
INSTANCE |
kind, MDX_PRECEDENCE, NL
Modifier | Constructor and Description |
---|---|
private |
SqlMatchRecognizeOperator() |
Modifier and Type | Method and Description |
---|---|
<R> void |
acceptCall(SqlVisitor<R> visitor,
SqlCall call,
boolean onlyExpressions,
SqlBasicVisitor.ArgHandler<R> argHandler)
Accepts a
SqlVisitor , directing an
SqlBasicVisitor.ArgHandler
to visit an operand of a call. |
SqlCall |
createCall(SqlLiteral functionQualifier,
SqlParserPos pos,
SqlNode... operands)
Creates a call to this operand with an array of operands.
|
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.
|
void |
validateCall(SqlCall call,
SqlValidator validator,
SqlValidatorScope scope,
SqlValidatorScope operandScope)
Validates a call to this operator.
|
acceptCall, adjustType, allowsFraming, argumentMustBeScalar, checkOperandCount, checkOperandTypes, constructArgNameList, constructArgTypeList, constructOperandList, createCall, createCall, createCall, deriveType, 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, needsSpace, preValidateCall, requiresDecimalExpansion, requiresOrder, requiresOver, rewriteCall, rightPrec, toString, unparseListClause, unparseListClause, validateOperands, validRexOperands
public static final SqlMatchRecognize.SqlMatchRecognizeOperator INSTANCE
public SqlSyntax getSyntax()
SqlOperator
getSyntax
in class SqlOperator
public SqlCall createCall(SqlLiteral functionQualifier, SqlParserPos pos, SqlNode... operands)
SqlOperator
The position of the resulting call is the union of the
pos
and the positions of all of the operands.
createCall
in class SqlOperator
functionQualifier
- function qualifier (e.g. "DISTINCT"), may bepos
- parser position of the identifier of the calloperands
- array of operandspublic <R> void acceptCall(SqlVisitor<R> visitor, SqlCall call, boolean onlyExpressions, SqlBasicVisitor.ArgHandler<R> argHandler)
SqlOperator
SqlVisitor
, directing an
SqlBasicVisitor.ArgHandler
to visit an operand of a call.
The argument handler allows fine control about how the operands are visited, and how the results are combined.
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 operandpublic 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 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 SqlOperator
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