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https://issues.apache.org/jira/browse/HIVE-22747?focusedWorklogId=385408&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-385408
]
ASF GitHub Bot logged work on HIVE-22747:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 11/Feb/20 19:54
Start Date: 11/Feb/20 19:54
Worklog Time Spent: 10m
Work Description: miklosgergely commented on pull request #882:
HIVE-22747 Break up DDLSemanticAnalyzer - extract Table info and lock analyzers
URL: https://github.com/apache/hive/pull/882#discussion_r377863674
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/ddl/table/info/desc/DescTableAnalyzer.java
##########
@@ -0,0 +1,210 @@
+/*
+ * 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.hadoop.hive.ql.ddl.table.info.desc;
+
+import java.util.Map;
+
+import org.apache.hadoop.hive.common.TableName;
+import org.apache.hadoop.hive.ql.ErrorMsg;
+import org.apache.hadoop.hive.ql.QueryState;
+import org.apache.hadoop.hive.ql.ddl.DDLWork;
+import org.apache.hadoop.hive.ql.ddl.table.info.TableInfoUtils;
+import org.apache.hadoop.hive.ql.ddl.DDLSemanticAnalyzerFactory.DDLType;
+import org.apache.hadoop.hive.ql.ddl.DDLUtils;
+import org.apache.hadoop.hive.ql.exec.Task;
+import org.apache.hadoop.hive.ql.exec.TaskFactory;
+import org.apache.hadoop.hive.ql.hooks.ReadEntity;
+import org.apache.hadoop.hive.ql.metadata.Hive;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.metadata.InvalidTableException;
+import org.apache.hadoop.hive.ql.metadata.Partition;
+import org.apache.hadoop.hive.ql.metadata.Table;
+import org.apache.hadoop.hive.ql.parse.ASTNode;
+import org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer;
+import org.apache.hadoop.hive.ql.parse.HiveParser;
+import org.apache.hadoop.hive.ql.parse.HiveTableName;
+import org.apache.hadoop.hive.ql.parse.SemanticException;
+import org.apache.hadoop.hive.ql.session.SessionState;
+
+/**
+ * Analyzer for table describing commands.
+ *
+ * A query like this will generate a tree as follows
+ * "describe formatted default.maptable partition (b=100) id;"
+ * TOK_TABTYPE
+ * TOK_TABNAME --> root for tablename, 2 child nodes mean DB specified
+ * default
+ * maptable
+ * TOK_PARTSPEC --> root node for partition spec. else columnName
+ * TOK_PARTVAL
+ * b
+ * 100
+ * id --> root node for columnName
+ * formatted
+ */
+@DDLType(type=HiveParser.TOK_DESCTABLE)
+public class DescTableAnalyzer extends BaseSemanticAnalyzer {
+ public DescTableAnalyzer(QueryState queryState) throws SemanticException {
+ super(queryState);
+ }
+
+ @Override
+ public void analyzeInternal(ASTNode root) throws SemanticException {
+ ctx.setResFile(ctx.getLocalTmpPath());
+
+ ASTNode tableTypeExpr = (ASTNode) root.getChild(0);
+
+ TableName tableName = getTableName(tableTypeExpr);
+ Table table = getTable(tableName);
+
+ // process the second child,if exists, node to get partition spec(s)
+ Map<String, String> partitionSpec = getPartitionSpec(db, tableTypeExpr,
tableName);
+ TableInfoUtils.validateTable(db, table, partitionSpec);
+
+ // process the third child node,if exists, to get partition spec(s)
+ String columnPath = getColumnPath(db, tableTypeExpr, tableName,
partitionSpec);
+
+ boolean showColStats = false;
+ boolean isFormatted = false;
+ boolean isExt = false;
+ if (root.getChildCount() == 2) {
+ int descOptions = root.getChild(1).getType();
+ isFormatted = descOptions == HiveParser.KW_FORMATTED;
+ isExt = descOptions == HiveParser.KW_EXTENDED;
+ // in case of "DESCRIBE FORMATTED tablename column_name" statement,
colPath will contain tablename.column_name.
+ // If column_name is not specified colPath will be equal to tableName.
+ // This is how we can differentiate if we are describing a table or
column.
+ if (columnPath != null && isFormatted) {
+ showColStats = true;
+ }
+ }
+
+ inputs.add(new ReadEntity(table));
+
+ DescTableDesc desc = new DescTableDesc(ctx.getResFile(), tableName,
partitionSpec, columnPath, isExt, isFormatted);
+ Task<?> task = TaskFactory.get(new DDLWork(getInputs(), getOutputs(),
desc));
+ rootTasks.add(task);
+
+ task.setFetchSource(true);
+ String schema = showColStats ? DescTableDesc.COLUMN_STATISTICS_SCHEMA :
DescTableDesc.SCHEMA;
+ setFetchTask(createFetchTask(schema));
+ }
+
+ /** Process the first node to extract tablename, it is either TABLENAME or
DBNAME.TABLENAME if db is given. */
+ private TableName getTableName(ASTNode tableTypeExpr) throws
SemanticException {
Review comment:
Fixed.
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Issue Time Tracking
-------------------
Worklog Id: (was: 385408)
Time Spent: 2h (was: 1h 50m)
> Break up DDLSemanticAnalyzer - extract Table info and lock analyzers
> --------------------------------------------------------------------
>
> Key: HIVE-22747
> URL: https://issues.apache.org/jira/browse/HIVE-22747
> Project: Hive
> Issue Type: Sub-task
> Reporter: Miklos Gergely
> Assignee: Miklos Gergely
> Priority: Major
> Labels: pull-request-available, refactor-ddl
> Attachments: HIVE-22747.01.patch, HIVE-22747.02.patch,
> HIVE-22747.03.patch
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> DDLSemanticAnalyzer is a huge class, more than 4000 lines long. The goal is
> to refactor it in order to have everything cut into more handleable classes
> under the package org.apache.hadoop.hive.ql.exec.ddl:
> * have a separate class for each analyzers
> * have a package for each operation, containing an analyzer, a description,
> and an operation, so the amount of classes under a package is more manageable
> Step #13: extract the table info and lock related analyzers from
> DDLSemanticAnalyzer, and move them under the new package.
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