org.eigenbase.rel
Class AggregateRelBase.AggCallBinding

java.lang.Object
  org.eigenbase.sql.SqlOperatorBinding
      org.eigenbase.rel.AggregateRelBase.AggCallBinding

Enclosing class:

AggregateRelBase

public static class AggregateRelBase.AggCallBinding
extends SqlOperatorBinding

Implementation of the SqlOperatorBinding interface for an aggregate call applied to a set of operands in the context of a AggregateRel.

Field Summary

private AggregateRelBase	aggregateRel
private List<Integer>	operands

Fields inherited from class org.eigenbase.sql.SqlOperatorBinding

typeFactory

Constructor Summary

AggregateRelBase.AggCallBinding(RelDataTypeFactory typeFactory, SqlAggFunction aggFunction, AggregateRelBase aggregateRel, List<Integer> operands)
Creates an AggCallBinding

Method Summary

int	getOperandCount()
RelDataType	getOperandType(int ordinal) Gets the type of a bound operand.
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, isOperandNull

Methods inherited from class java.lang.Object

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

Field Detail

aggregateRel

private final AggregateRelBase aggregateRel

operands

private final List<Integer> operands

Constructor Detail

AggregateRelBase.AggCallBinding

AggregateRelBase.AggCallBinding(RelDataTypeFactory typeFactory,
                                SqlAggFunction aggFunction,
                                AggregateRelBase aggregateRel,
                                List<Integer> operands)

Creates an AggCallBinding

Parameters:

typeFactory - Type factory

aggFunction - Aggregation function

aggregateRel - Relational expression which is context

operands - Operand ordinals

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