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KYLIN-3552 Data Source SDK to ingest data from different JDBC sources
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43 changes: 43 additions & 0 deletions
43
core-metadata/src/main/java/org/apache/kylin/source/adhocquery/AbstractPushdownRunner.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.kylin.source.adhocquery; | ||
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| import org.apache.kylin.common.KylinConfig; | ||
| import org.apache.kylin.common.util.ClassUtil; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
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| public abstract class AbstractPushdownRunner implements IPushDownRunner { | ||
| public static final Logger logger = LoggerFactory.getLogger(AbstractPushdownRunner.class); | ||
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| @Override | ||
| public String convertSql(KylinConfig kylinConfig, String sql, String project, String defaultSchema, | ||
| boolean isPrepare) { | ||
| String converted = sql; | ||
| for (String converterName : kylinConfig.getPushDownConverterClassNames()) { | ||
| IPushDownConverter converter = (IPushDownConverter) ClassUtil.newInstance(converterName); | ||
| String tmp = converter.convert(converted, project, defaultSchema, isPrepare); | ||
| if (!converted.equals(tmp)) { | ||
| logger.info("the query is converted to {} after applying converter {}", tmp, converterName); | ||
| } | ||
| converted = tmp; | ||
| } | ||
| return converted; | ||
| } | ||
| } |
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185 changes: 185 additions & 0 deletions
185
core-metadata/src/test/java/org/apache/kylin/source/H2Database.java
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.kylin.source; | ||
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| import com.google.common.collect.Lists; | ||
| import org.apache.commons.io.IOUtils; | ||
| import org.apache.kylin.common.KylinConfig; | ||
| import org.apache.kylin.metadata.TableMetadataManager; | ||
| import org.apache.kylin.metadata.model.ColumnDesc; | ||
| import org.apache.kylin.metadata.model.TableDesc; | ||
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| import java.io.File; | ||
| import java.io.FileOutputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.sql.Connection; | ||
| import java.sql.SQLException; | ||
| import java.sql.Statement; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Locale; | ||
| import java.util.Map; | ||
|
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| public class H2Database { | ||
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| private static final String[] ALL_TABLES = new String[] { // | ||
| "edw.test_cal_dt", // | ||
| "default.test_category_groupings", // | ||
| "default.test_kylin_fact", // | ||
| "default.test_order", // | ||
| "edw.test_seller_type_dim", // | ||
| "edw.test_sites", // | ||
| "default.test_account", // | ||
| "default.test_country", // | ||
| "default.streaming_table" | ||
| }; | ||
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| private static final Map<String, String> javaToH2DataTypeMapping = new HashMap<String, String>(); | ||
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| static { | ||
| javaToH2DataTypeMapping.put("short", "smallint"); | ||
| javaToH2DataTypeMapping.put("long", "bigint"); | ||
| javaToH2DataTypeMapping.put("byte", "tinyint"); | ||
| javaToH2DataTypeMapping.put("string", "varchar"); | ||
| } | ||
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| private final Connection h2Connection; | ||
| private final KylinConfig config; | ||
| private final String project; | ||
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| public H2Database(Connection h2Connection, KylinConfig config, String prj) { | ||
| this.h2Connection = h2Connection; | ||
| this.config = config; | ||
| this.project = prj; | ||
| } | ||
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| public void loadAllTables() throws SQLException { | ||
| for (String tableName : ALL_TABLES) { | ||
| loadH2Table(tableName); | ||
| } | ||
| } | ||
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| public void dropAll() throws SQLException { | ||
| try (Statement stmt = h2Connection.createStatement()) { | ||
| StringBuilder sqlBuilder = new StringBuilder(); | ||
| for (String tblName : ALL_TABLES) | ||
| sqlBuilder.append("DROP TABLE ").append(tblName).append(";\n"); | ||
| sqlBuilder.append("DROP SCHEMA DEFAULT;\nDROP SCHEMA EDW;\n"); | ||
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| stmt.executeUpdate(sqlBuilder.toString()); | ||
| } | ||
| } | ||
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| private void loadH2Table(String tableName) throws SQLException { | ||
| TableMetadataManager metaMgr = TableMetadataManager.getInstance(config); | ||
| TableDesc tableDesc = metaMgr.getTableDesc(tableName.toUpperCase(Locale.ROOT), project); | ||
| File tempFile = null; | ||
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| try { | ||
| tempFile = File.createTempFile("tmp_h2", ".csv"); | ||
| FileOutputStream tempFileStream = new FileOutputStream(tempFile); | ||
| String path = path(tableDesc); | ||
| InputStream csvStream = metaMgr.getStore().getResource(path).inputStream; | ||
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| IOUtils.copy(csvStream, tempFileStream); | ||
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| csvStream.close(); | ||
| tempFileStream.close(); | ||
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| } catch (IOException e) { | ||
| e.printStackTrace(); | ||
| } | ||
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| String cvsFilePath = tempFile.getPath(); | ||
| try (Statement stmt = h2Connection.createStatement()) { | ||
| String createDBSql = "CREATE SCHEMA IF NOT EXISTS DEFAULT;\nCREATE SCHEMA IF NOT EXISTS EDW;\nSET SCHEMA DEFAULT;\n"; | ||
| stmt.executeUpdate(createDBSql); | ||
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| String sql = generateCreateH2TableSql(tableDesc, cvsFilePath); | ||
| stmt.executeUpdate(sql); | ||
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| List<String> createIndexStatements = generateCreateH2IndexSql(tableDesc); | ||
| for (String indexSql : createIndexStatements) { | ||
| stmt.executeUpdate(indexSql); | ||
| } | ||
| } | ||
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| tempFile.delete(); | ||
| } | ||
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| private String path(TableDesc tableDesc) { | ||
| if ("EDW.TEST_SELLER_TYPE_DIM".equals(tableDesc.getIdentity())) // it is a view of table below | ||
| return "/data/" + "EDW.TEST_SELLER_TYPE_DIM_TABLE" + ".csv"; | ||
| else | ||
| return "/data/" + tableDesc.getIdentity() + ".csv"; | ||
| } | ||
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| private String generateCreateH2TableSql(TableDesc tableDesc, String csvFilePath) { | ||
| StringBuilder ddl = new StringBuilder(); | ||
| StringBuilder csvColumns = new StringBuilder(); | ||
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| ddl.append("CREATE TABLE " + tableDesc.getIdentity() + "\n"); | ||
| ddl.append("(" + "\n"); | ||
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| for (int i = 0; i < tableDesc.getColumns().length; i++) { | ||
| ColumnDesc col = tableDesc.getColumns()[i]; | ||
| if (col.isComputedColumn()) { | ||
| continue; | ||
| } | ||
| if (i > 0) { | ||
| ddl.append(","); | ||
| csvColumns.append(","); | ||
| } | ||
| ddl.append(col.getName() + " " + getH2DataType((col.getDatatype())) + "\n"); | ||
| csvColumns.append(col.getName()); | ||
| } | ||
| ddl.append(")" + "\n"); | ||
| ddl.append("AS SELECT * FROM CSVREAD('" + csvFilePath + "', '" + csvColumns | ||
| + "', 'charset=UTF-8 fieldSeparator=,');"); | ||
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| return ddl.toString(); | ||
| } | ||
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| private List<String> generateCreateH2IndexSql(TableDesc tableDesc) { | ||
| List<String> result = Lists.newArrayList(); | ||
| int x = 0; | ||
| for (ColumnDesc col : tableDesc.getColumns()) { | ||
| if ("T".equalsIgnoreCase(col.getIndex())) { | ||
| StringBuilder ddl = new StringBuilder(); | ||
| ddl.append("CREATE INDEX IDX_" + tableDesc.getName() + "_" + x + " ON " + tableDesc.getIdentity() + "(" | ||
| + col.getName() + ")"); | ||
| ddl.append("\n"); | ||
| result.add(ddl.toString()); | ||
| x++; | ||
| } | ||
| } | ||
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| return result; | ||
| } | ||
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| private static String getH2DataType(String javaDataType) { | ||
| String hiveDataType = javaToH2DataTypeMapping.get(javaDataType.toLowerCase(Locale.ROOT)); | ||
| if (hiveDataType == null) { | ||
| hiveDataType = javaDataType; | ||
| } | ||
| return hiveDataType.toLowerCase(Locale.ROOT); | ||
| } | ||
|
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| } |
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