Package io.trino.plugin.jdbc.aggregation

Class ImplementCountDistinct

java.lang.Object

io.trino.plugin.jdbc.aggregation.ImplementCountDistinct

All Implemented Interfaces:

AggregateFunctionRule<JdbcExpression,ParameterizedExpression>

public class ImplementCountDistinct
extends Object
implements AggregateFunctionRule<JdbcExpression,ParameterizedExpression>

Implements count(DISTINCT x).

Nested Class Summary

Nested classes/interfaces inherited from interface io.trino.plugin.base.aggregation.AggregateFunctionRule

AggregateFunctionRule.RewriteContext<ExpressionResult extends Object>

Constructor Summary

Constructors

Constructor	Description
ImplementCountDistinct(JdbcTypeHandle bigintTypeHandle, boolean isRemoteCollationSensitive)

Method Summary

Modifier and Type	Method	Description
Pattern<AggregateFunction>	getPattern()
Optional<JdbcExpression>	rewrite(AggregateFunction aggregateFunction, Captures captures, AggregateFunctionRule.RewriteContext<ParameterizedExpression> context)

Methods inherited from class java.lang.Object

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

Constructor Details

ImplementCountDistinct

public ImplementCountDistinct(JdbcTypeHandle bigintTypeHandle,
 boolean isRemoteCollationSensitive)

Parameters:

bigintTypeHandle - A JdbcTypeHandle that will be mapped to BigintType by JdbcClient.toColumnMapping(io.trino.spi.connector.ConnectorSession, java.sql.Connection, io.trino.plugin.jdbc.JdbcTypeHandle).

Method Details

getPattern

public Pattern<AggregateFunction> getPattern()

Specified by:

getPattern in interface AggregateFunctionRule<JdbcExpression,ParameterizedExpression>

rewrite

public Optional<JdbcExpression> rewrite(AggregateFunction aggregateFunction,
 Captures captures,
 AggregateFunctionRule.RewriteContext<ParameterizedExpression> context)

Specified by:

rewrite in interface AggregateFunctionRule<JdbcExpression,ParameterizedExpression>