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I'm running into the same issue as well. Did you find a solution?

<@!527749046954360852>  <@!909200533372416040> 
If I understand the question you want an int8 column to show up in js as a string because js won't handle the int8 if large number.   You can cast a column in .select('col::text')  part of supabase js call.

can we cast strings as int8/bigint on `.insert` as well?

I  personally have not tried it, but one would think so.  This is all pretty much postgrest.org stuff.   There are some limits on filters if I recall.

<@!909200533372416040>   I did a quick test and I could not get any sort of ::cast to work with the javascript object on an update, BUT just doing .update({number:'5020888899833'}) was converted into an int8 column correctly.