com.hazelcast.jet.sql.impl.parse.SqlShowStatement Maven / Gradle / Ivy
/*
* 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.parse;
import com.hazelcast.org.apache.calcite.sql.SqlCall;
import com.hazelcast.org.apache.calcite.sql.SqlKind;
import com.hazelcast.org.apache.calcite.sql.SqlNode;
import com.hazelcast.org.apache.calcite.sql.SqlOperator;
import com.hazelcast.org.apache.calcite.sql.SqlSpecialOperator;
import com.hazelcast.org.apache.calcite.sql.SqlWriter;
import com.hazelcast.org.apache.calcite.sql.parser.SqlParserPos;
import javax.annotation.Nonnull;
import java.util.Collections;
import java.util.List;
public class SqlShowStatement extends SqlCall {
public static final SqlSpecialOperator SHOW_MAPPINGS = new SqlSpecialOperator("SHOW EXTERNAL MAPPINGS", SqlKind.OTHER);
public static final SqlSpecialOperator SHOW_VIEWS = new SqlSpecialOperator("SHOW VIEWS", SqlKind.OTHER);
public static final SqlSpecialOperator SHOW_JOBS = new SqlSpecialOperator("SHOW JOBS", SqlKind.OTHER);
public static final SqlSpecialOperator SHOW_TYPES = new SqlSpecialOperator("SHOW TYPES", SqlKind.OTHER);
private final ShowStatementTarget target;
public SqlShowStatement(SqlParserPos pos, ShowStatementTarget target) {
super(pos);
this.target = target;
}
public ShowStatementTarget getTarget() {
return target;
}
@Nonnull
@Override
public SqlOperator getOperator() {
return target.operator;
}
@Nonnull
@Override
public List getOperandList() {
return Collections.emptyList();
}
@Override
public void unparse(SqlWriter writer, int leftPrec, int rightPrec) {
writer.keyword(target.operator.getName());
}
/**
* The argument of the SHOW command (e.g. SHOW MAPPINGS, SHOW VIEWS, SHOW JOBS).
*/
public enum ShowStatementTarget {
MAPPINGS(SHOW_MAPPINGS),
VIEWS(SHOW_VIEWS),
JOBS(SHOW_JOBS),
TYPES(SHOW_TYPES);
private final SqlSpecialOperator operator;
ShowStatementTarget(SqlSpecialOperator operator) {
this.operator = operator;
}
}
}
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