org.eigenbase.sql
Class SqlInfixOperator

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

Direct Known Subclasses:

SqlBetweenOperator

public class SqlInfixOperator
extends SqlSpecialOperator

A generalization of a binary operator to involve several (two or more) arguments, and keywords between each pair of arguments.

For example, the BETWEEN operator is ternary, and has syntax exp1 BETWEEN exp2 AND exp3.

Since:

Aug 8, 2004

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/SqlInfixOperator.java#11 $

Author:

jhyde

Field Summary

private String[]

names

Fields inherited from class org.eigenbase.sql.SqlOperator

MaxPrec, NL

Constructor Summary

protected

SqlInfixOperator(String[] names, SqlKind kind, int precedence, SqlReturnTypeInference returnTypeInference, SqlOperandTypeInference operandTypeInference, SqlOperandTypeChecker operandTypeChecker)

Method Summary

SqlSyntax	getSyntax() Returns the syntactic type of this operator.
(package private) boolean	needsSpace()
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

names

private final String[] names

Constructor Detail

SqlInfixOperator

protected SqlInfixOperator(String[] names,
                           SqlKind kind,
                           int precedence,
                           SqlReturnTypeInference returnTypeInference,
                           SqlOperandTypeInference operandTypeInference,
                           SqlOperandTypeChecker operandTypeChecker)

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

needsSpace

boolean needsSpace()