Tom Lane wrote:
I'm not sure what the most convenient user API would be for an on-demand
hard-read-only mode, but we can't use SET TRANSACTION READ ONLY for it.
It'd have to be some other syntax. Maybe just use a GUC variable
instead of bespoke syntax? SET TRANSACTION is really just syntactic
sugar for GUC SET operations anyway ...
We could reuse the transaction_read_only GUC, adding "strict" as a 3rd
allowed value beside "on" and "off". And maybe make "ansi" an alias for
"on" to emphasize that one behavior is what the standard wants, and the
other is a postgres extension.
regards, Florian Pflug
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