Hi,
Your current query actually process your 10K rows,
it is a bit of an overkill if only a few row contains the key you want to delete.
Depending on how big your json data is, this could be problematic.
Have you considered adding a where clause to your query ?
Also, maybe you could create an index on your jsonb column
to improve the identification of rows which
contains the key you want to delete ?
Le mer. 17 juil. 2019 à 16:31, Volkan Unsal <spocksplanet@xxxxxxxxx> a écrit :
I'm trying to remove a key from a jsonb column in a table with 10K rows, and the performance is abysmal. When the key is missing, it takes 5 minutes. When the key is present, it takes even longer.Test with non-existent key:>> update projects set misc = misc - 'foo';
Time: 324711.960 ms (05:24.712)What can I do to improve this?
