Impala add column to existing table

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August undefined, 2024

WitrynaImpala can create tables containing complex type columns, with any supported file format. Because currently Impala can only query complex type columns in Parquet … Witryna13 cze 2024 · 1 Answer Sorted by: 0 LongType is dataframe datatype not spark SQL datatype which if you scroll down in your error message you will see So in spark sql use below query spark.sql ("ALTER TABLE deltatable ADD COLUMNS (abc Long, dea Long AFTER ttt)") Share Improve this answer Follow answered Jun 13, 2024 at 20:08 …

How to create partitions from one impala table to another

Witryna5 wrz 2024 · Is there any way to : 1.add new columns in my table (for new data) 2.keep the old data (just mark the last two columns as 'NULL') ? hadoop external-tables Share Improve this question Follow asked Sep 5, 2024 at 9:34 emhlbmc 238 3 15 Possible duplicate of Add a column in a table in HIVE QL – philantrovert Sep 5, 2024 at 13:15 2 Witryna15 sie 2024 · 1 Answer Sorted by: 5 If you don't mind to replicate the column information at record level, you can do this CREATE TABLE new_table PARTITIONED BY (id_partition) STORED AS PARQUET AS SELECT *, id as id_partition FROM old_table You will not be able to do it in a different way in Impala. chiropractor brackla bridgend

cloudera - Impala add column to existing VIEW - Stack Overflow

Witryna28 sty 2024 · I am trying to count the number of columns in a table in Impala. ... Add a column with a default value to an existing table in SQL Server. 2354. How to concatenate text from multiple rows into a single text string in SQL Server. 849. Witryna28 lut 2024 · Insert columns into a table with Table Designer In Object Explorer, right-click the table to which you want to add columns and choose Design. Select the first blank cell in the Column Name column. Type the column name in the cell. The column name is a required value. graphics card recognized as pci device

I want to add two columns names to an existing table in …

Using the Parquet File Format with Impala Tables

Witryna21 gru 2024 · You do not modify columns. You read, change, then re-write. One way to complete the above concept in hive query language: select parquet into a non parquet table, do your work to modify the new table, update the new column, etc, then select back into a new parquet table with the new schema. You can also do some of the … Witryna12 kwi 2024 · Incremental integer ID in Impala. I am using Impala for querying parquet -tables and cannot find a solution to increment an integer -column ranging from 1..n. … chiropractor brace road cherry hillWitrynaThe syntax CREATE EXTERNAL TABLE sets up an Impala table that points at existing data files, potentially in HDFS locations outside the normal Impala data directories.. This operation saves the expense of importing the data into a new table when you already have the data files in a known location in HDFS, in the desired file format. chiropractor bradford

"Witryna1 lis 2012 · You cannot add a column with a default value in Hive. You have the right syntax for adding the column ALTER TABLE test1 ADD COLUMNS (access_count1 int);, you just need to get rid of default sum (max_count). No changes to that files backing your table will happen as a result of adding the column. " - Impala add column to existing table

Impala add column to existing table

Impala create parquet table with partition from existing Kudu table ...

WitrynaImpala can create tables containing complex type columns, with any supported file format. Because currently Impala can only query complex type columns in Parquet tables, creating tables with complex type columns and other file formats such as … WitrynaThe ALTER TABLE statement is used to add, delete, or modify columns in an existing table. The ALTER TABLE statement is also used to add and drop various constraints …

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WitrynaCurrently, Impala can only insert data into tables that use the text and Parquet formats. For other file formats, insert the data using Hive and use Impala to query it. As an … Witryna15 lis 2024 · In Impala, is there a way to check which tables in the database contain a specific column name? Something like: select tablename, columnname from …

Witryna19 maj 2016 · CREATE TABLE blah_copy LIKE blah INSERT INTO TABLE blah_copy SELECT * FROM blah. It looks to create the table for me when I run because they … Witryna28 lip 2024 · 1. I went through the Cloudera docs. It doesn't mention how to add a column to an existing view. Is it because there is no way to achieve that? If I use …

Witryna8 lut 2016 · CREATE TABLE NEWPARTITIONING ( COLUMNS ... ) PARTITON ON ( MONTHS INT, DAY INT ) as SELECT * from tablewitholdpartitioning. Loading a large number of partitions at a time can result in bad loading patterns so be careful and follow the guidelines in my doc: http://www.slideshare.net/BenjaminLeonhardi/hive-loading … Witryna11 sty 2024 · Show 2 more comments. 1. Hive doesn't support updates (or deletes), but it supports INSERT INTO, so it is possible to add new rows to an existing table. > insert overwrite table table_name > select *, case when [condition] then 1 else flag_col end as flag_col, from table_name //If you want to use you can add where// > where id <> 1; …

Witryna10 gru 2015 · After a lot of mistakes, in addition to above explanations, I would add simpler answers. Case 1: Add new column named new_column. ALTER TABLE schema.table_name ADD new_column INT COMMENT 'new number column'); Case 2: Rename a column new_column to no_of_days.

Witryna1 lip 2024 · After adding new columns in Kudu tables from impala, I had some issues computing stats for this table. Everything works fine until the Compute Stats … chiropractor bramptonWitryna28 sty 2024 · I am trying to count the number of columns in a table in Impala. ... Add a column with a default value to an existing table in SQL Server. 2354. How to … graphics card razerWitryna15 lut 2024 · CREATE TABLE TABLE_3 AS WITH TABLE_1 AS ( SELECT * FROM SOMEWHERE_1 ), TABLE_2 AS ( SELECT * FROM SOMEWHERE_2 ) SELECT … graphics card recordingWitrynaCurrently, Impala can only insert data into tables that use the text and Parquet formats. For other file formats, insert the data using Hive and use Impala to query it. As an alternative to the INSERT statement, if you have existing data files elsewhere in HDFS, the LOAD DATA statement can move those files into a table. chiropractor bradford paWitryna25 mar 2015 · My point is that without modifying the Impala and Hive metastore code, there is no way to create columns with brackets in the name. It is not supported and there is no workaround, unfortunately. – Matt Mar 26, 2015 at 15:48 Yes, I understand that. Unfortunately this is a no-go for the use-cases that I have. Your response saved … graphics card recyclingWitryna20 lip 2024 · INSERT OVERWRITE TABLE db_name.parquet_table PARTITION (year = 0, month = 0, day = 0) SELECT field1,..., fieldn --do not include partitioned columns … chiropractor bradford woods paWitryna2 paź 2024 · To reorganize columns for a table: You can add multiple columns at a time using the ALTER TABLE statement. If you specify the IF NOT EXISTS clause, Impala silently ignores the ADD request and does not return an error if a column with … Note: In the impala-shell interpreter, a semicolon at the end of each statement … graphics card rattling noise