org.apache.calcite.sql

Class ExplicitOperatorBinding

java.lang.Object

org.apache.calcite.sql.SqlOperatorBinding

org.apache.calcite.sql.ExplicitOperatorBinding

public class ExplicitOperatorBinding
extends SqlOperatorBinding

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

Field Summary

Fields inherited from class org.apache.calcite.sql.SqlOperatorBinding

typeFactory

Constructor Summary

Constructors

Constructor and Description
ExplicitOperatorBinding(RelDataTypeFactory typeFactory, SqlOperator operator, List<RelDataType> types)
ExplicitOperatorBinding(SqlOperatorBinding delegate, List<RelDataType> types)

Method Summary

Methods

Modifier and Type	Method and Description
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.
CalciteException	newError(Resources.ExInst<SqlValidatorException> e) Wraps a validation error with context appropriate to this operator call.

Methods inherited from class org.apache.calcite.sql.SqlOperatorBinding

collectOperandTypes, getColumnListParamInfo, getCursorOperand, getGroupCount, getIntLiteralOperand, getOperator, getStringLiteralOperand, getTypeFactory

Methods inherited from class java.lang.Object

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

Constructor Detail

ExplicitOperatorBinding

public ExplicitOperatorBinding(SqlOperatorBinding delegate,
                       List<RelDataType> types)

ExplicitOperatorBinding

public ExplicitOperatorBinding(RelDataTypeFactory typeFactory,
                       SqlOperator operator,
                       List<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 CalciteException newError(Resources.ExInst<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, not null

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