Do "the laws" mentioned in the U.S. Oath of Allegiance have to be constitutional? I want to run query like find file name where there is a user "abc". How can I find a particular column name within all tables in Hive.? A table in Hive is a set of data that uses a schema to sort the data by given identifiers. Why don't beryllium and magnesium dissolve in ammonia? But of course the data doesn't includes file name inside. Or you can try below command if you are using Beeline, Note: It will work with Beeline only (JDBC client based), More about beeline: http://blog.cloudera.com/blog/2014/02/migrating-from-hive-cli-to-beeline-a-primer/. By running the following command on HIVE metastore db, we can easily find all the database and tables. First issue the USE command to identify the schema for which you want to viewtables or views. If you want to get the file names corresponding to a hive table, the below query will help you. Let foo is the table name to search. Hide the source code for an Automator quick action / service, How to initialize a qubit with a custom state in Qiskit Composer. Thanks for contributing an answer to Stack Overflow! hadoop fs -ls -R -C /apps/hive/warehouse/ 2>/dev/null | grep '/apps/hive/warehouse/ [^/]\ {1,\}/foo$'. Asking for help, clarification, or responding to other answers. 1- show all tables: SHOW TABLES; get the list and run this query on all tables: DESCRIBE FORMATTED tableX; Then you can get the results and extract the owner, if it's the desired one, drop the table. This chapter explains how to create a table and how to insert data into it. Do I have to relinquish my sign on and passwords for websites pertaining to work (ie: access to insurance companies and medicare)? That's an extention of Mantej Singh's answer: you can use pyspark to find tables across all Hive databases (not just one): The way to do this is to iterate through the databases searching for table with a specified name. Join Stack Overflow to learn, share knowledge, and build your career. /tmp/databases) hive -e "show databases;" >> /tmp/databases . Reference How to get/generate the create statement for an existing hive table? Metastore schema can be found at: link: https://issues.apache.org/jira/secure/attachment/12471108/HiveMetaStore.pdf. For column comments, you can simply run the hive command 'DESCRIBE tablename;', and you should see a comment column in the results. If women are paid less for the same work, why don't employers hire just women? rev 2021.3.12.38768, Stack Overflow works best with JavaScript enabled, Where developers & technologists share private knowledge with coworkers, Programming & related technical career opportunities, Recruit tech talent & build your employer brand, Reach developers & technologists worldwide. When you drop an internal table, it drops the data and also drops the metadata of the table. Can someone explain me SN10 landing failure in layman's term? Tables can also be given an alias, this is particularly common in join queries involving multiple tables where there is a need to distinguish between columns with the same name in different tables. Is there a cyclic list manipulate function? Could we carve a large radio dish in the Antarctic ice? How to code arrows that go from one line to another, I don't understand why it is necessary to use a trigger on an oscilloscope for data acquisition. Step 1: Get the list of all the databases, commands for that is and redirect the output to any temporary file (e.g. How long would it take for inbreeding issues to arise for a family that practiced inbreeding? how to get input file name as column within hive query, https://cwiki.apache.org/confluence/display/Hive/LanguageManual+VirtualColumns, State of the Stack: a new quarterly update on community and product, Podcast 320: Covid vaccine websites are frustrating. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Postdoc in China. How did James Potter get his Invisibility Cloak? This developer built a…. Yes, you can retrieve the file the record was found in using the virtual column named INPUT__FILE__NAME, for example: If necessary, use the provided string functions to trim the host and directories from the uri. I want know the row number for this value. @hisi's answer is elegant. ]table_name (col_name data_type [COMMENT 'col_comment'],, ...) [COMMENT 'table_comment'] [ROW FORMAT row_format] [FIELDS TERMINATED BY char] [STORED AS file_format]; Create Table Statement. This feature is available from Hive versions above 0.8. select db_name, table_name, column_name from ( SELECT d.NAME as db_name, t.TBL_NAME as table_name, c.COLUMN_NAME as column_name, c.INTEGER_IDX as idx FROM DBS d JOIN TBLS t on t.DB_ID = d.DB_ID JOIN SDS s on t.SD_ID = s.SD_ID JOIN COLUMNS_V2 c on c.CD_ID = s.CD_ID WHERE d.NAME = :dbName union SELECT d.NAME as db_name, t.TBL_NAME as table_name, k.PKEY_NAME as column_name… In this post, we will check Apache Hive table statistics – Hive ANALYZE TABLE command and some examples. The following queries rename the column name and column data type using the above data: When creating an external table in Hive, you need to provide the following information: Name of the table – The create external table command creates the table. For Internal tables, Hive by default stores the files at the data warehouse location which is located at /user/hive/warehouse. Hive provides us the functionality to perform Alteration on the Tables and Databases.ALTER TABLE command can be used to perform alterations on the tables. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. How worried should I be about this cough? The easiest way would be using Apache Atlas, if you have Atlas installed, you should be able to see all the table/column metadata, including comments in the … If one does not remember exact name of table but only substring bar in table name, then command is. You can use SQL like to search a table. In Hive, how do we search a table by name in all databases? Use DROP TABLE to drop a table, like any other RDBMS, dropping a table in hive drops the table description from Hive Metastore and it’s data from the Hive warehouse store(For internal tables). To avoid this, add if not exists to the statement. I am a Teradata user. Looking on advice about culture shock and pursuing a career in industry. How does the strong force increase in attraction as particles move farther away? For example, the following USE statement tells Drill that youonly want information from the dfs.myviewsschema: In this example, “myviews” is a workspace created within thedfsstorage plugin configuration. hive> show databases; (this command will list all databases in your hive) hive> use test_db; (this command will select test_db hive database) hive> show tables; (this command will list all tables within test_db database) You can create a for loop in bash shell to iterate through each hive database and get all the table names per database using hive CLI. To learn more, see our tips on writing great answers. This will give us the file name corresponding to each record. Especially, if we search something out of huge number of log files created as external hive table, we will get to know the matching file names to get further insights. When you use a particular schema and then issue the SHOW TABLES command, Drillreturns the tables and views within that schema. Thanks a lot!. Show Create Table which generates and shows the Create table statement for the given table. You can find the connection properties within hive-site.xml, Within the metastore you can use a query similar to the following. Join Stack Overflow to learn, share knowledge, and build your career. I don't see such a path you have mentioned above, This path is not in the OS file system but is in the HDFS file system, you should run hdfs dfs -ls /apps/hive/warehouse/, you should also check the access permission if you are able to read this path, http://blog.cloudera.com/blog/2014/02/migrating-from-hive-cli-to-beeline-a-primer/, https://issues.apache.org/jira/secure/attachment/12471108/HiveMetaStore.pdf, State of the Stack: a new quarterly update on community and product, Podcast 320: Covid vaccine websites are frustrating. This developer built a…, Using awk to include file name with format in column, Getting the file name in Hadoop mapper using Hadoop Pipes. Inclusion of an idecomposable module in the direct sum of two copies always split? you can also use hdfs to find a table in all databases: Hive stores all its metadata information in Metastore. They are. select INPUT__FILE__NAME, name from customer_data; This will give us the file name corresponding to each record. How to copy all hive table from one Database to other Database, hive search 2 columns are present in a single column in second table, Restrict a user from creating table in a database in hive. Viewing Hive Schema and Table Metadata. Is a comment aligned with the element being commented a good practice? We can use the INPUT__FILE__NAME column. 2- Connect with your hive metastore DB and get the table list of the owner you want. The conventions of creating a table in HIVE is quite similar to creating a table using SQL. Suppose if we want to find the name of the file corresponding to each record in a file. The following table contains the fields of employeetable and it shows the fields to be changed (in bold). How worried should I be about this cough? Why are the changes needed? site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. bin/beeline -u jdbc:hive2://127.0.0.1:10000 scott tiger -e 'show partitions zipcodes;' > partitions.txt #Use below, If you are using HiverServer1 and using Hive CLI hive -e 'show partitions zipcodes;' > partitions.txt
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