com.hazelcast.org.apache.calcite.schema.impl.AbstractTable 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.org.apache.calcite.schema.impl;
import com.hazelcast.org.apache.calcite.config.CalciteConnectionConfig;
import com.hazelcast.org.apache.calcite.schema.Schema;
import com.hazelcast.org.apache.calcite.schema.Statistic;
import com.hazelcast.org.apache.calcite.schema.Statistics;
import com.hazelcast.org.apache.calcite.schema.Table;
import com.hazelcast.org.apache.calcite.schema.Wrapper;
import com.hazelcast.org.apache.calcite.sql.SqlCall;
import com.hazelcast.org.apache.calcite.sql.SqlNode;
import com.hazelcast.org.checkerframework.checker.nullness.qual.Nullable;
/**
* Abstract base class for implementing {@link Table}.
*
* Sub-classes should override {@link #isRolledUp} and
* {@link Table#rolledUpColumnValidInsideAgg(String, SqlCall, SqlNode, CalciteConnectionConfig)}
* if their table can potentially contain rolled up values. This information is
* used by the validator to check for illegal uses of these columns.
*/
public abstract class AbstractTable implements Table, Wrapper {
protected AbstractTable() {
}
// Default implementation. Override if you have statistics.
@Override public Statistic getStatistic() {
return Statistics.UNKNOWN;
}
@Override public Schema.TableType getJdbcTableType() {
return Schema.TableType.TABLE;
}
@Override public @Nullable C unwrap(Class aClass) {
if (aClass.isInstance(this)) {
return aClass.cast(this);
}
return null;
}
@Override public boolean isRolledUp(String column) {
return false;
}
@Override public boolean rolledUpColumnValidInsideAgg(String column,
SqlCall call, @Nullable SqlNode parent, @Nullable CalciteConnectionConfig config) {
return true;
}
}