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[SPARK-33687][SQL] Support analyze all tables in a specific database #30648
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--- | ||
layout: global | ||
title: ANALYZE TABLES | ||
displayTitle: ANALYZE TABLES | ||
license: | | ||
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 | ||
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http://www.apache.org/licenses/LICENSE-2.0 | ||
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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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### Description | ||
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The `ANALYZE TABLES` statement collects statistics about all the tables in a specified database to be used by the query optimizer to find a better query execution plan. | ||
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### Syntax | ||
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```sql | ||
ANALYZE TABLES [ { FROM | IN } database_name ] COMPUTE STATISTICS [ NOSCAN ] | ||
``` | ||
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### Parameters | ||
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* **{ FROM `|` IN } database_name** | ||
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Specifies the name of the database to be analyzed. Without a database name, `ANALYZE` collects all tables in the current database that the current user has permission to analyze. | ||
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* **[ NOSCAN ]** | ||
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Collects only the table's size in bytes (which does not require scanning the entire table). | ||
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### Examples | ||
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```sql | ||
CREATE DATABASE school_db; | ||
USE school_db; | ||
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CREATE TABLE teachers (name STRING, teacher_id INT); | ||
INSERT INTO teachers VALUES ('Tom', 1), ('Jerry', 2); | ||
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CREATE TABLE students (name STRING, student_id INT, age SHORT); | ||
INSERT INTO students VALUES ('Mark', 111111, 10), ('John', 222222, 11); | ||
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ANALYZE TABLES IN school_db COMPUTE STATISTICS NOSCAN; | ||
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DESC EXTENDED teachers; | ||
+--------------------+--------------------+-------+ | ||
| col_name| data_type|comment| | ||
+--------------------+--------------------+-------+ | ||
| name| string| null| | ||
| teacher_id| int| null| | ||
| ...| ...| ...| | ||
| Provider| parquet| | | ||
| Statistics| 1382 bytes| | | ||
| ...| ...| ...| | ||
+--------------------+--------------------+-------+ | ||
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DESC EXTENDED students; | ||
+--------------------+--------------------+-------+ | ||
| col_name| data_type|comment| | ||
+--------------------+--------------------+-------+ | ||
| name| string| null| | ||
| student_id| int| null| | ||
| age| smallint| null| | ||
| ...| ...| ...| | ||
| Statistics| 1828 bytes| | | ||
| ...| ...| ...| | ||
+--------------------+--------------------+-------+ | ||
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ANALYZE TABLES COMPUTE STATISTICS; | ||
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DESC EXTENDED teachers; | ||
+--------------------+--------------------+-------+ | ||
| col_name| data_type|comment| | ||
+--------------------+--------------------+-------+ | ||
| name| string| null| | ||
| teacher_id| int| null| | ||
| ...| ...| ...| | ||
| Provider| parquet| | | ||
| Statistics| 1382 bytes, 2 rows| | | ||
| ...| ...| ...| | ||
+--------------------+--------------------+-------+ | ||
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DESC EXTENDED students; | ||
+--------------------+--------------------+-------+ | ||
| col_name| data_type|comment| | ||
+--------------------+--------------------+-------+ | ||
| name| string| null| | ||
| student_id| int| null| | ||
| age| smallint| null| | ||
| ...| ...| ...| | ||
| Provider| parquet| | | ||
| Statistics| 1828 bytes, 2 rows| | | ||
| ...| ...| ...| | ||
+--------------------+--------------------+-------+ | ||
``` | ||
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### Related Statements | ||
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* [ANALYZE TABLE](sql-ref-syntax-aux-analyze-table.html) |
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--- | ||
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* [ANALYZE TABLE statement](sql-ref-syntax-aux-analyze-table.html) | ||
* [ANALYZE TABLES statement](sql-ref-syntax-aux-analyze-tables.html) | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. plz update the index page, too. |
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(AS? query)? #replaceTable | ||
| ANALYZE TABLE multipartIdentifier partitionSpec? COMPUTE STATISTICS | ||
(identifier | FOR COLUMNS identifierSeq | FOR ALL COLUMNS)? #analyze | ||
| ANALYZE TABLES ((FROM | IN) multipartIdentifier)? COMPUTE STATISTICS | ||
(identifier)? #analyzeTables | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. If There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. analyze also uses this There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. sgtm |
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| ALTER TABLE multipartIdentifier | ||
ADD (COLUMN | COLUMNS) | ||
columns=qualifiedColTypeWithPositionList #addTableColumns | ||
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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.spark.sql.execution.command | ||
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import scala.util.control.NonFatal | ||
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import org.apache.spark.sql.{Row, SparkSession} | ||
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/** | ||
* Analyzes all tables in the given database to generate statistics. | ||
*/ | ||
case class AnalyzeTablesCommand( | ||
databaseName: Option[String], | ||
noScan: Boolean) extends RunnableCommand { | ||
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override def run(sparkSession: SparkSession): Seq[Row] = { | ||
val catalog = sparkSession.sessionState.catalog | ||
val db = databaseName.getOrElse(catalog.getCurrentDatabase) | ||
catalog.listTables(db).foreach { tbl => | ||
try { | ||
CommandUtils.analyzeTable(sparkSession, tbl, noScan) | ||
} catch { | ||
case NonFatal(e) => | ||
logWarning(s"Failed to analyze table ${tbl.table} in the " + | ||
s"database $db because of ${e.toString}", e) | ||
} | ||
} | ||
Seq.empty[Row] | ||
} | ||
} |
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