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Tom Lane 4489044239 contrib/isn: Make weak mode a GUC setting, and fix related functions. ... isn's weak mode used to be a simple static variable, settable only via the isn_weak(boolean) function. This wasn't optimal, as this means it doesn't respect transactions nor respond to RESET ALL. This patch makes isn.weak a GUC parameter instead, so that it acts like any other user-settable parameter. The isn_weak() functions are retained for backwards compatibility. But we must fix their volatility markings: they were marked IMMUTABLE which is surely incorrect, and PARALLEL RESTRICTED which isn't right for GUC-related functions either. Mark isn_weak(boolean) as VOLATILE and PARALLEL UNSAFE, matching set_config(). Mark isn_weak() as STABLE and PARALLEL SAFE, matching current_setting(). Reported-by: Viktor Holmberg <v@viktorh.net> Diagnosed-by: Daniel Gustafsson <daniel@yesql.se> Author: Viktor Holmberg <v@viktorh.net> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/790bc1f9-74dc-4b50-94d2-8147315b1556@Spark		6 months ago
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isn.out	contrib/isn: Make weak mode a GUC setting, and fix related functions.	6 months ago