com.hazelcast.org.apache.calcite.jdbc.ContextSqlValidator Maven / Gradle / Ivy
/*
* 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.jdbc;
import com.hazelcast.org.apache.calcite.config.CalciteConnectionConfig;
import com.hazelcast.org.apache.calcite.prepare.CalciteCatalogReader;
import com.hazelcast.org.apache.calcite.sql.fun.SqlStdOperatorTable;
import com.hazelcast.org.apache.calcite.sql.validate.SqlValidatorImpl;
import com.hazelcast.com.google.common.collect.ImmutableList;
/**
* A SqlValidator with schema and type factory of the given
* {@link com.hazelcast.org.apache.calcite.jdbc.CalcitePrepare.Context}.
*
* This class is only used to derive data type for DDL sql node.
* Usually we deduce query sql node data type(i.e. the {@code SqlSelect})
* during the validation phrase. DDL nodes don't have validation,
* they can be executed directly through
* {@link com.hazelcast.org.apache.calcite.server.DdlExecutor}.
*
*
During the execution, {@link com.hazelcast.org.apache.calcite.sql.SqlDataTypeSpec} uses
* this validator to derive its type.
*/
public class ContextSqlValidator extends SqlValidatorImpl {
/**
* Create a {@code ContextSqlValidator}.
* @param context Prepare context.
* @param mutable Whether to get the mutable schema.
*/
public ContextSqlValidator(CalcitePrepare.Context context, boolean mutable) {
super(SqlStdOperatorTable.instance(), getCatalogReader(context, mutable),
context.getTypeFactory(), Config.DEFAULT);
}
private static CalciteCatalogReader getCatalogReader(
CalcitePrepare.Context context, boolean mutable) {
return new CalciteCatalogReader(
mutable ? context.getMutableRootSchema() : context.getRootSchema(),
ImmutableList.of(),
context.getTypeFactory(),
CalciteConnectionConfig.DEFAULT);
}
}