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This module bridges Table/SQL API and runtime. It contains
all resources that are required during pre-flight and runtime
phase. The content of this module is work-in-progress. It will
replace flink-table-planner once it is stable. See FLINK-11439
and FLIP-32 for more details.
/*
* 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 org.apache.flink.table.planner.catalog;
import org.apache.calcite.rel.type.RelProtoDataType;
import org.apache.calcite.schema.Function;
import org.apache.calcite.schema.Schema;
import org.apache.calcite.schema.SchemaVersion;
import java.util.Collection;
import java.util.Collections;
import java.util.Set;
/** Base class for flink {@link Schema}, which provides some default implementations. */
public abstract class FlinkSchema implements Schema {
@Override
public RelProtoDataType getType(String name) {
return null;
}
@Override
public Set getTypeNames() {
return Collections.emptySet();
}
@Override
public Collection getFunctions(String name) {
return Collections.emptyList();
}
@Override
public Set getFunctionNames() {
return Collections.emptySet();
}
@Override
public Schema snapshot(SchemaVersion version) {
return this;
}
}