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72 lines
2.4 KiB
72 lines
2.4 KiB
/* |
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* Licensed to the Apache Software Foundation (ASF) under one or more |
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* contributor license agreements. See the NOTICE file distributed with |
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* this work for additional information regarding copyright ownership. |
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* The ASF licenses this file to You under the Apache License, Version 2.0 |
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* (the "License"); you may not use this file except in compliance with |
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* the License. You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.apache.dolphinscheduler.dao.plugin.postgresql.dialect; |
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import org.apache.dolphinscheduler.dao.plugin.api.dialect.DatabaseDialect; |
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import java.sql.Connection; |
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import java.sql.PreparedStatement; |
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import java.sql.ResultSet; |
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import java.sql.SQLException; |
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import javax.sql.DataSource; |
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import lombok.SneakyThrows; |
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public class PostgresqlDialect implements DatabaseDialect { |
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private final DataSource dataSource; |
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public PostgresqlDialect(DataSource dataSource) { |
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this.dataSource = dataSource; |
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} |
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@SneakyThrows |
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@Override |
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public boolean tableExists(String tableName) { |
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try ( |
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Connection conn = dataSource.getConnection(); |
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ResultSet rs = conn.getMetaData().getTables(conn.getCatalog(), getSchema(), tableName, null)) { |
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return rs.next(); |
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} |
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} |
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@SneakyThrows |
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@Override |
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public boolean columnExists(String tableName, String columnName) { |
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try ( |
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Connection conn = dataSource.getConnection(); |
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ResultSet rs = conn.getMetaData().getTables(conn.getCatalog(), getSchema(), tableName, null)) { |
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return rs.next(); |
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} |
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} |
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private String getSchema() throws SQLException { |
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try ( |
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Connection conn = dataSource.getConnection(); |
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PreparedStatement pstmt = conn.prepareStatement("select current_schema()"); |
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ResultSet resultSet = pstmt.executeQuery()) { |
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while (resultSet.next()) { |
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if (resultSet.isFirst()) { |
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return resultSet.getString(1); |
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} |
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} |
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} |
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return ""; |
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} |
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}
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