com.hazelcast.org.apache.calcite.adapter.jdbc.JdbcTableScan Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* See the License for the specific language governing permissions and
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package com.hazelcast.org.apache.calcite.adapter.jdbc;
import com.hazelcast.org.apache.calcite.plan.Convention;
import com.hazelcast.org.apache.calcite.plan.RelOptCluster;
import com.hazelcast.org.apache.calcite.plan.RelOptTable;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.core.TableScan;
import com.hazelcast.org.apache.calcite.rel.hint.RelHint;
import com.hazelcast.com.google.common.collect.ImmutableList;
import java.util.List;
import java.util.Objects;
import static com.hazelcast.org.apache.calcite.linq4j.Nullness.castNonNull;
import static java.util.Objects.requireNonNull;
/**
* Relational expression representing a scan of a table in a JDBC data source.
*/
public class JdbcTableScan extends TableScan implements JdbcRel {
public final JdbcTable jdbcTable;
protected JdbcTableScan(
RelOptCluster cluster,
List hints,
RelOptTable table,
JdbcTable jdbcTable,
JdbcConvention jdbcConvention) {
super(cluster, cluster.traitSetOf(jdbcConvention), hints, table);
this.jdbcTable = Objects.requireNonNull(jdbcTable, "jdbcTable");
}
@Override public RelNode copy(RelTraitSet traitSet, List inputs) {
assert inputs.isEmpty();
return new JdbcTableScan(
getCluster(), getHints(), table, jdbcTable, (JdbcConvention) castNonNull(getConvention()));
}
@Override public JdbcImplementor.Result implement(JdbcImplementor implementor) {
return implementor.result(jdbcTable.tableName(),
ImmutableList.of(JdbcImplementor.Clause.FROM), this, null);
}
@Override public RelNode withHints(List hintList) {
Convention convention = requireNonNull(getConvention(), "getConvention()");
return new JdbcTableScan(getCluster(), hintList, getTable(), jdbcTable,
(JdbcConvention) convention);
}
}
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