org.apache.phoenix.parse.ShowSchemasStatement Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of phoenix-mapreduce-byo-shaded-hbase-hbase-2.6

Phoenix Mapreduce JAR for use with the "hbase mapredcp" classpath

The newest version!

/*
 * 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.phoenix.parse;

import org.apache.phoenix.thirdparty.com.google.common.base.Preconditions;
import org.apache.phoenix.compile.ColumnResolver;

import javax.annotation.Nullable;
import java.util.Objects;

/**
 * ParseNode implementation for SHOW SCHEMAS sql.
 */
public class ShowSchemasStatement extends ShowStatement {
    @Nullable
    private final String schemaPattern;

    public ShowSchemasStatement(String pattern) {
        schemaPattern = pattern;
    };

    @Nullable
    protected String getSchemaPattern() {
        return schemaPattern;
    }

    public void toSQL(ColumnResolver resolver, StringBuilder buf) {
        Preconditions.checkNotNull(buf);
        buf.append("SHOW SCHEMAS");
        if (schemaPattern != null) {
            buf.append(" LIKE ");
            buf.append("'").append(schemaPattern).append("'");
        }
    }

    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder();
        toSQL(null, buf);
        return buf.toString();
    }

    @Override
    public boolean equals(Object other) {
        if (!(other instanceof ShowSchemasStatement)) return false;
        ShowSchemasStatement stmt = (ShowSchemasStatement) other;
        return Objects.equals(schemaPattern, stmt.getSchemaPattern());
    }

    @Override
    public int hashCode() {
      return Objects.hashCode(schemaPattern);
    }
}