WebThere are several tools available that help you to test Hive queries. Some of them that you might want to look at HiveRunner, Hive_test, and Beetest. Sampling: Sampling allows users to take a subset of datasets and analyze it without analyzing the entire data set. WebJul 23, 2024 · HiveQL currently supports the analyze command to compute statistics on tables and partitions. HiveQL’s analyze command will be extended to trigger statistics computation on one or more column in a Hive table/partition. The necessary changes to HiveQL are as below, analyze table t [partition p] compute statistics for [columns c,...];
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WebFor example, the Hive connector does not currently provide statistics on data size. Displaying Table Statistics Table statistics can be displayed via the Presto CLI using the SHOW STATS command. There are two flavors of the command: SHOW STATS FOR will show statistics for the table layout representing all data in the table WebJan 18, 2014 · tblproperties will give the size of the table and can be used to grab just that value if needed. -- gives all properties show tblproperties yourTableName -- show just the raw data size show tblproperties yourTableName ("rawDataSize") Share. Improve this … how many f15s are there
How to List Hive High Volume Tables? - DWgeek.com
WebSHOW FILES Statement. The SHOW FILES statement displays the files that constitute a specified table, or a partition within a partitioned table. This syntax is available in CDH 5.4 / Impala 2.2 and higher only. The output includes the names of the files, the size of each file, and the applicable partition for a partitioned table. WebMar 21, 2024 · The describe extended command will show the detailed information of the table such as list of columns , data type of the columns,table type,location of the table,table size and so on. Syntax: 1 describe extended table_name; Example: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 hive> describe extended customer_Txn; OK account_id varchar(40) WebAug 13, 2024 · The common methods are to query the table with hive: -- gives all properties show tblproperties yourTableName -- show just the raw data size show tblproperties yourTableName ("rawDataSize") Or the most accurate is to look at the table location in HDFS: hdfs dfs -du -s -h /path/to/table how many f14 does us have