org.eigenbase.rex
Class RexCallBinding

java.lang.Object
  org.eigenbase.sql.SqlOperatorBinding
      org.eigenbase.rex.RexCallBinding

public class RexCallBinding
extends SqlOperatorBinding

RexCallBinding implements SqlOperatorBinding by referring to an underlying collection of RexNode operands.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/rex/RexCallBinding.java#11 $

Author:

Wael Chatila

Field Summary

private RexNode[]

operands

Fields inherited from class org.eigenbase.sql.SqlOperatorBinding

typeFactory

Constructor Summary

RexCallBinding(RelDataTypeFactory typeFactory, SqlOperator sqlOperator, RexNode[] operands)

Method Summary

int	getIntLiteralOperand(int ordinal) Gets the integer value of a numeric literal operand.
int	getOperandCount()
RelDataType	getOperandType(int ordinal) Gets the type of a bound operand.
String	getStringLiteralOperand(int ordinal) Gets the string value of a string literal operand.
boolean	isOperandNull(int ordinal, boolean allowCast) Determines whether a bound operand is NULL.
EigenbaseException	newError(SqlValidatorException e) Wraps a validation error with context appropriate to this operator call.

Methods inherited from class org.eigenbase.sql.SqlOperatorBinding

collectOperandTypes, getColumnListParamInfo, getCursorOperand, getOperator, getTypeFactory

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

operands

private final RexNode[] operands

Constructor Detail

RexCallBinding

public RexCallBinding(RelDataTypeFactory typeFactory,
                      SqlOperator sqlOperator,
                      RexNode[] operands)

Method Detail

getStringLiteralOperand

public String getStringLiteralOperand(int ordinal)

Description copied from class: SqlOperatorBinding

Gets the string value of a string literal operand.

Overrides:

getStringLiteralOperand in class SqlOperatorBinding

Parameters:

ordinal - zero-based ordinal of operand of interest

Returns:

string value

getIntLiteralOperand

public int getIntLiteralOperand(int ordinal)

Description copied from class: SqlOperatorBinding

Gets the integer value of a numeric literal operand.

Overrides:

getIntLiteralOperand in class SqlOperatorBinding

Parameters:

ordinal - zero-based ordinal of operand of interest

Returns:

integer value

isOperandNull

public boolean isOperandNull(int ordinal,
                             boolean allowCast)

Description copied from class: SqlOperatorBinding

Determines whether a bound operand is NULL.

This is only relevant for SQL validation.

Overrides:

isOperandNull in class SqlOperatorBinding

Parameters:

ordinal - zero-based ordinal of operand of interest

allowCast - whether to regard CAST(constant) as a constant

Returns:

whether operand is null; false for everything except SQL validation

getOperandCount

public int getOperandCount()

Specified by:

getOperandCount in class SqlOperatorBinding

Returns:

the number of bound operands

getOperandType

public RelDataType getOperandType(int ordinal)

Description copied from class: SqlOperatorBinding

Gets the type of a bound operand.

Specified by:

getOperandType in class SqlOperatorBinding

Parameters:

ordinal - zero-based ordinal of operand of interest

Returns:

bound operand type

newError

public EigenbaseException newError(SqlValidatorException e)

Description copied from class: SqlOperatorBinding

Wraps a validation error with context appropriate to this operator call.

Specified by:

newError in class SqlOperatorBinding

Parameters:

e - Validation error

Returns:

Error wrapped, if possible, with positional information