org.eigenbase.sql
Class SqlOrderByOperator

java.lang.Object
  org.eigenbase.sql.SqlOperator
      org.eigenbase.sql.SqlSpecialOperator
          org.eigenbase.sql.SqlOrderByOperator

public class SqlOrderByOperator
extends SqlSpecialOperator

SqlOrderByOperator is used to represent an ORDER BY on a query other than a SELECT (e.g. VALUES or UNION). It is a purely syntactic operator, and is eliminated by SqlValidator.performUnconditionalRewrites and replaced with the ORDER_OPERAND of SqlSelect.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/SqlOrderByOperator.java#14 $

Author:

John V. Sichi

Field Summary

static int	ORDER_OPERAND
static int	QUERY_OPERAND

Fields inherited from class org.eigenbase.sql.SqlOperator

MaxPrec, NL

Constructor Summary

SqlOrderByOperator()

Method Summary

SqlSyntax	getSyntax() Returns the syntactic type of this operator.
void	unparse(SqlWriter writer, SqlNode[] operands, 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.eigenbase.sql.SqlSpecialOperator

reduceExpr

Methods inherited from class org.eigenbase.sql.SqlOperator

acceptCall, acceptCall, adjustType, argumentMustBeScalar, checkOperandCount, checkOperandTypes, createCall, createCall, createCall, createCall, deriveType, equals, getAllowedSignatures, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, getName, getOperandCountRange, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, getSignatureTemplate, hashCode, inferReturnType, inferReturnType, isAggregator, isDeterministic, isDynamicFunction, isName, leftPrec, preValidateCall, requiresDecimalExpansion, rewriteCall, rightPrec, toString, unparseListClause, unparseListClause, validateCall, validateOperands

Methods inherited from class java.lang.Object

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

Field Detail

QUERY_OPERAND

public static final int QUERY_OPERAND

See Also:

Constant Field Values

ORDER_OPERAND

public static final int ORDER_OPERAND

See Also:

Constant Field Values

Constructor Detail

SqlOrderByOperator

public SqlOrderByOperator()

Method Detail

getSyntax

public SqlSyntax getSyntax()

Description copied from class: SqlOperator

Returns the syntactic type of this operator.

Overrides:

getSyntax in class SqlSpecialOperator

unparse

public void unparse(SqlWriter writer,
                    SqlNode[] operands,
                    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.eigenbase.sql.SqlWriter, org.eigenbase.sql.SqlOperator, org.eigenbase.sql.SqlNode[], int, int).

Overrides:

unparse in class SqlSpecialOperator