Package org.apache.calcite.adapter.enumerable

Class RexImpTable

java.lang.Object

org.apache.calcite.adapter.enumerable.RexImpTable

public class RexImpTable
extends Object

Contains implementations of Rex operators as Java code.

Immutable.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	RexImpTable.LagImplementor	Implementor for the LAG windowed aggregate function.
static class	RexImpTable.LeadImplementor	Implementor for the LEAD windowed aggregate function.
static enum	RexImpTable.NullAs	Strategy what an operator should return if one of its arguments is null.
static interface	RexImpTable.RexCallImplementor	Null-safe implementor of RexCalls.
static class	RexImpTable.UserDefinedAggReflectiveImplementor	Implementor for user-defined aggregate functions.

Field Summary

Fields

Modifier and Type	Field	Description
static final MemberExpression	BOXED_FALSE_EXPR
static final MemberExpression	BOXED_TRUE_EXPR
static final ConstantExpression	COLON_EXPR
static final ConstantExpression	COMMA_EXPR
static final ConstantExpression	FALSE_EXPR
static final RexImpTable	INSTANCE	The singleton instance.
static final ConstantExpression	NULL_EXPR
static final ConstantExpression	TRUE_EXPR

Method Summary

Modifier and Type	Method	Description
static CallImplementor	createImplementor(NotNullImplementor implementor, NullPolicy nullPolicy, boolean harmonize)
@Nullable AggImplementor	get(SqlAggFunction aggregation, boolean forWindowAggregate)
MatchImplementor	get(SqlMatchFunction function)
@Nullable RexImpTable.RexCallImplementor	get(SqlOperator operator)
TableFunctionCallImplementor	get(SqlWindowTableFunction operator)
static Expression	multiplyDivide(Expression e, BigDecimal multiplier, BigDecimal divider)	Multiplies an expression by a constant and divides by another constant, optimizing appropriately.

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final RexImpTable INSTANCE

The singleton instance.

NULL_EXPR

public static final ConstantExpression NULL_EXPR

FALSE_EXPR

public static final ConstantExpression FALSE_EXPR

TRUE_EXPR

public static final ConstantExpression TRUE_EXPR

COMMA_EXPR

public static final ConstantExpression COMMA_EXPR

COLON_EXPR

public static final ConstantExpression COLON_EXPR

BOXED_FALSE_EXPR

public static final MemberExpression BOXED_FALSE_EXPR

BOXED_TRUE_EXPR

public static final MemberExpression BOXED_TRUE_EXPR

Method Details

createImplementor

public static CallImplementor createImplementor(NotNullImplementor implementor,
 NullPolicy nullPolicy,
 boolean harmonize)

get

public @Nullable RexImpTable.RexCallImplementor get(SqlOperator operator)

get

public @Nullable AggImplementor get(SqlAggFunction aggregation,
 boolean forWindowAggregate)

get

public MatchImplementor get(SqlMatchFunction function)

get

public TableFunctionCallImplementor get(SqlWindowTableFunction operator)

multiplyDivide

public static Expression multiplyDivide(Expression e,
 BigDecimal multiplier,
 BigDecimal divider)

Multiplies an expression by a constant and divides by another constant, optimizing appropriately.

For example, multiplyDivide(e, 10, 1000) returns e / 100.