Package org.apache.calcite.sql

Class SqlMatchRecognize.SqlMatchRecognizeOperator

java.lang.Object

org.apache.calcite.sql.SqlOperator

org.apache.calcite.sql.SqlMatchRecognize.SqlMatchRecognizeOperator

Enclosing class:

SqlMatchRecognize

public static class SqlMatchRecognize.SqlMatchRecognizeOperator
extends SqlOperator

An operator describing a MATCH_RECOGNIZE specification.

Field Summary

Fields

Modifier and Type	Field	Description
static SqlMatchRecognize.SqlMatchRecognizeOperator	INSTANCE

Fields inherited from class org.apache.calcite.sql.SqlOperator

kind, MDX_PRECEDENCE, NL

Constructor Summary

Constructors

Modifier	Constructor	Description
private	SqlMatchRecognizeOperator()

Method Summary

Modifier and Type	Method	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.

Methods inherited from class org.apache.calcite.sql.SqlOperator

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

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

INSTANCE

public static final SqlMatchRecognize.SqlMatchRecognizeOperator INSTANCE

Constructor Detail

SqlMatchRecognizeOperator

private SqlMatchRecognizeOperator()

Method Detail

getSyntax

public SqlSyntax getSyntax()

Description copied from class: SqlOperator

Returns the syntactic type of this operator, never null.

Specified by:

getSyntax in class SqlOperator

createCall

public SqlCall createCall(SqlLiteral functionQualifier,
                          SqlParserPos pos,
                          SqlNode... operands)

Description copied from class: SqlOperator

Creates a call to this operand with an array of operands.

The position of the resulting call is the union of the pos and the positions of all of the operands.

Overrides:

createCall in class SqlOperator

Parameters:

functionQualifier - function qualifier (e.g. "DISTINCT"), may be

pos - parser position of the identifier of the call

operands - array of operands

acceptCall

public <R> void acceptCall(SqlVisitor<R> visitor,
                           SqlCall call,
                           boolean onlyExpressions,
                           SqlBasicVisitor.ArgHandler<R> argHandler)

Description copied from class: SqlOperator

Accepts a 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.

Overrides:

acceptCall in class SqlOperator

Parameters:

visitor - Visitor

call - Call to visit

onlyExpressions - If true, ignores operands which are not expressions. For example, in the call to the AS operator

argHandler - Called for each operand

validateCall

public void validateCall(SqlCall call,
                         SqlValidator validator,
                         SqlValidatorScope scope,
                         SqlValidatorScope operandScope)

Description copied from class: SqlOperator

Validates a call to this operator.

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.

Overrides:

validateCall in class SqlOperator

Parameters:

call - the call to this operator

validator - the active validator

scope - validator scope

operandScope - validator scope in which to validate operands to this call; usually equal to scope, but not always because some operators introduce new scopes

See Also:

SqlNode.validateExpr(SqlValidator, SqlValidatorScope), SqlOperator.deriveType(SqlValidator, SqlValidatorScope, SqlCall)

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 class SqlOperator