IF (SELECT EXISTS(SELECT * FROM pg_catalog.pg_table_defĪ few more failed attempts: CREATE OR REPLACE PROCEDURE alter_my_table()ĬASE WHEN COUNT(*) THEN 'warning: column exists already. The ALTER TABLE docs don't mention any way to do it, but that doesn't prove there isn't a workaround of some sort, particularly in Redshift, which uses a 'column-oriented' storage model. When refreshing or connecting to Amazon Redshift in Tableau Online.
These are some of my attempts: IF (SELECT EXISTS(SELECT * FROM pg_catalog.pg_table_def When Tableau Desktop connects to Oracle, some tables are unable to create an extract. Accessing Amazon Redshift clusters and databases. Amazon Redshift displays an error message that the column cant be dropped because another object depends on it. You can also refer to the following resources for more detailed information. I am also a bit new to redshift, so I would appreciate a response! These suggestions give you a starting point for troubleshooting.
#Redshift alter table hangs how to
But I don't know how to ALTER the table to add or remove one. Easy integration with Athena, Glue, Redshift, Timestream, OpenSearch. I am able to get a TRUE or FALSE for columns that I want to check. As part of this change, weve moved the library from AWS Labs to the main AWS. such as CONNECT BY LEVEL > 0, will cause the query to hang unless NOCYCLE is used. I have come across these posts in stackoverflow, however couldn't find a proper solution from them: Use the SELECT statement to retrieve data from tables or views. I am trying to replicate a functionality from SQL Server into redshift where I have to ignore column if the column exists, otherwise add it into the table.
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