Package org.apache.calcite.sql

Class SqlSnapshot.SqlSnapshotOperator

java.lang.Object

org.apache.calcite.sql.SqlOperator

org.apache.calcite.sql.SqlSnapshot.SqlSnapshotOperator

Enclosing class:

SqlSnapshot

public static class SqlSnapshot.SqlSnapshotOperator
extends SqlOperator

An operator describing a FOR SYSTEM_TIME specification.

Field Summary

Fields

Modifier and Type	Field	Description
static final SqlSnapshot.SqlSnapshotOperator	INSTANCE

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

kind, MDX_PRECEDENCE, NL

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(@Nullable SqlLiteral functionQualifier, SqlParserPos pos, @Nullable SqlNode... operands)	Creates a call to this operator 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.

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

acceptCall, adjustType, allowsFraming, argumentMustBeScalar, checkOperandCount, checkOperandTypes, constructArgNameList, constructArgTypeList, constructOperandList, createCall, createCall, createCall, createCall, createCall, createCall, deriveOperandType, deriveType, equals, getAllowedSignatures, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, getMonotonicity, getName, getNameAsId, getOperandCountRange, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, getSignatureTemplate, getStrongPolicyInference, hashCode, inferReturnType, inferReturnType, isAggregator, isDeterministic, isDynamicFunction, isGroup, isGroupAuxiliary, isName, isSymmetrical, leftPrec, not, preValidateCall, requiresDecimalExpansion, requiresOrder, requiresOver, reverse, rewriteCall, rightPrec, toString, unparseListClause, unparseListClause, validateCall, validateOperands, validRexOperands

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final SqlSnapshot.SqlSnapshotOperator INSTANCE

Method Details

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(@Nullable SqlLiteral functionQualifier,
 SqlParserPos pos,
 @Nullable SqlNode... operands)

Description copied from class: SqlOperator

Creates a call to this operator 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"), or null

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

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