Package org.apache.calcite.rex

Class RexCallBinding

java.lang.Object

org.apache.calcite.sql.SqlOperatorBinding

org.apache.calcite.rex.RexCallBinding

Direct Known Subclasses:

RexCallBinding.RexCastCallBinding

public class RexCallBinding
extends SqlOperatorBinding

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

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	RexCallBinding.RexCastCallBinding	To be compatible with SqlCall, CAST needs to pretend that it has two arguments, the second of which is the target type.

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.List<RelCollation>	inputCollations
private java.util.List<RexNode>	operands

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

typeFactory

Constructor Summary

Constructors

Constructor	Description
RexCallBinding(RelDataTypeFactory typeFactory, SqlOperator sqlOperator, java.util.List<? extends RexNode> operands, java.util.List<RelCollation> inputCollations)

Method Summary

Modifier and Type	Method	Description
static RexCallBinding	create(RelDataTypeFactory typeFactory, RexCall call, java.util.List<RelCollation> inputCollations)	Creates a binding of the appropriate type.
int	getIntLiteralOperand(int ordinal)	Gets the integer value of a numeric literal operand.
int	getOperandCount()
<T> T	getOperandLiteralValue(int ordinal, java.lang.Class<T> clazz)	Gets the value of a literal operand.
SqlMonotonicity	getOperandMonotonicity(int ordinal)	Gets the monotonicity of a bound operand.
RelDataType	getOperandType(int ordinal)	Gets the type of a bound operand.
java.lang.String	getStringLiteralOperand(int ordinal)	Gets the string value of a string literal operand.
boolean	isOperandLiteral(int ordinal, boolean allowCast)	Determines whether an operand is a literal.
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, getOperandLiteralValue, getOperator, getTypeFactory, hasFilter

Methods inherited from class java.lang.Object

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

Field Detail

operands

private final java.util.List<RexNode> operands

inputCollations

private final java.util.List<RelCollation> inputCollations

Constructor Detail

RexCallBinding

public RexCallBinding(RelDataTypeFactory typeFactory,
                      SqlOperator sqlOperator,
                      java.util.List<? extends RexNode> operands,
                      java.util.List<RelCollation> inputCollations)

Method Detail

create

public static RexCallBinding create(RelDataTypeFactory typeFactory,
                                    RexCall call,
                                    java.util.List<RelCollation> inputCollations)

Creates a binding of the appropriate type.

getStringLiteralOperand

public java.lang.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

getOperandLiteralValue

public <T> T getOperandLiteralValue(int ordinal,
                                    java.lang.Class<T> clazz)

Description copied from class: SqlOperatorBinding

Gets the value of a literal operand.

Cases:

• If the operand is not a literal, the value is null.
• If the operand is a string literal, the value will be of type NlsString.
• If the operand is a numeric literal, the value will be of type BigDecimal.
• If the operand is an interval qualifier, the value will be of type SqlIntervalQualifier
• Otherwise the type is undefined, and the value may be null.

Overrides:

getOperandLiteralValue in class SqlOperatorBinding

Parameters:

ordinal - zero-based ordinal of operand of interest

clazz - Desired valued type

Returns:

value of operand

getOperandMonotonicity

public SqlMonotonicity getOperandMonotonicity(int ordinal)

Description copied from class: SqlOperatorBinding

Gets the monotonicity of a bound operand.

Overrides:

getOperandMonotonicity in class SqlOperatorBinding

Parameters:

ordinal - zero-based ordinal of operand of interest

Returns:

monotonicity of operand

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

isOperandLiteral

public boolean isOperandLiteral(int ordinal,
                                boolean allowCast)

Description copied from class: SqlOperatorBinding

Determines whether an operand is a literal.

Overrides:

isOperandLiteral in class SqlOperatorBinding

Parameters:

ordinal - zero-based ordinal of operand of interest

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

Returns:

whether operand is literal

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