org.eigenbase.sql
Class ExplicitOperatorBinding

java.lang.Object
  org.eigenbase.sql.SqlOperatorBinding
      org.eigenbase.sql.ExplicitOperatorBinding

public class ExplicitOperatorBinding
extends SqlOperatorBinding

ExplicitOperatorBinding implements SqlOperatorBinding via an underlying array of known operand types.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/ExplicitOperatorBinding.java#12 $

Author:

Wael Chatila

Field Summary

private SqlOperatorBinding	delegate
private RelDataType[]	types

Fields inherited from class org.eigenbase.sql.SqlOperatorBinding

typeFactory

Constructor Summary

	ExplicitOperatorBinding(RelDataTypeFactory typeFactory, SqlOperator operator, RelDataType[] types)
	ExplicitOperatorBinding(SqlOperatorBinding delegate, RelDataType[] types)
private	ExplicitOperatorBinding(SqlOperatorBinding delegate, RelDataTypeFactory typeFactory, SqlOperator operator, RelDataType[] types)

Method Summary

int	getOperandCount()
RelDataType	getOperandType(int ordinal) Gets the type of a bound 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, getIntLiteralOperand, getOperator, getStringLiteralOperand, getTypeFactory

Methods inherited from class java.lang.Object

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

Field Detail

types

private final RelDataType[] types

delegate

private final SqlOperatorBinding delegate

Constructor Detail

ExplicitOperatorBinding

public ExplicitOperatorBinding(SqlOperatorBinding delegate,
                               RelDataType[] types)

ExplicitOperatorBinding

public ExplicitOperatorBinding(RelDataTypeFactory typeFactory,
                               SqlOperator operator,
                               RelDataType[] types)

ExplicitOperatorBinding

private ExplicitOperatorBinding(SqlOperatorBinding delegate,
                                RelDataTypeFactory typeFactory,
                                SqlOperator operator,
                                RelDataType[] types)

Method Detail

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

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