All Downloads are FREE. Search and download functionalities are using the official Maven repository.

com.hazelcast.jet.sql.impl.opt.physical.index.IndexComponentCandidate Maven / Gradle / Ivy

There is a newer version: 5.5.0
Show newest version
/*
 * Copyright 2021 Hazelcast Inc.
 *
 * Licensed under the Hazelcast Community License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://hazelcast.com/hazelcast-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.jet.sql.impl.opt.physical.index;

import com.hazelcast.sql.impl.exec.scan.index.IndexFilter;
import com.hazelcast.org.apache.calcite.rex.RexNode;

/**
 * A candidate expression that could potentially be used to form a filter on some index component.
 * 

* Consider the query {@code SELECT * FROM person WHERE name=? AND age=?}. After analysis two candidates would be * created: one for the {@code name=?} expression, and another for the {@code age=?} expression. If there is an index * on any of those columns, the engine will attempt to apply the candidate to the index to form an {@link IndexComponentFilter}. */ class IndexComponentCandidate { /** Original Calcite expression that formed this candidate. */ private final RexNode expression; /** Ordinal of the column in the owning table. */ private final int columnIndex; /** Index filter created from the Calcite expression. */ private final IndexFilter filter; IndexComponentCandidate( RexNode expression, int columnIndex, IndexFilter filter ) { this.expression = expression; this.columnIndex = columnIndex; this.filter = filter; } RexNode getExpression() { return expression; } int getColumnIndex() { return columnIndex; } IndexFilter getFilter() { return filter; } @Override public String toString() { return "IndexComponentCandidate {expression=" + expression + ", columnIndex=" + columnIndex + ", filter=" + filter + '}'; } }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy