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Daniel Becker updated IMPALA-11168: ----------------------------------- Fix Version/s: Not Applicable (was: Impala 4.2.0) > Add pseudo-columns for Impala > ----------------------------- > > Key: IMPALA-11168 > URL: https://issues.apache.org/jira/browse/IMPALA-11168 > Project: IMPALA > Issue Type: New Feature > Components: Backend, Frontend > Reporter: Zoltán Borók-Nagy > Priority: Major > Fix For: Not Applicable > > > Hive supports a few pseudo-columns (virtual column): > [https://cwiki.apache.org/confluence/display/hive/languagemanual+virtualcolumns] > It would be useful to add support for a few pseudo-columns for Impala as well. > E.g. to implement support for Iceberg position-based deletes we'd need the > file name and ordinal position for each row. > Hive has {{INPUT_\_FILE_\_NAME}} which returns full URI of the data file. > Unfortunately it doesn't have a pseudo-column for the ordinal position of > rows. So we need to introduce a new pseudo-column for that, probably with the > name {{ORDINAL_\_POSITION_\_INSIDE_\_FILE}}, or stg. like that. -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org