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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
35 lines
737 B
C
35 lines
737 B
C
/*-------------------------------------------------------------------------
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*
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* isn.h
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* PostgreSQL type definitions for ISNs (ISBN, ISMN, ISSN, EAN13, UPC)
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*
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* Author: German Mendez Bravo (Kronuz)
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* Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* contrib/isn/isn.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef ISN_H
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#define ISN_H
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#include "fmgr.h"
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#undef ISN_DEBUG
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/*
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* uint64 is the internal storage format for ISNs.
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*/
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typedef uint64 ean13;
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#define EAN13_FORMAT UINT64_FORMAT
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#define PG_GETARG_EAN13(n) PG_GETARG_INT64(n)
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#define PG_RETURN_EAN13(x) PG_RETURN_INT64(x)
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extern void initialize(void);
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#endif /* ISN_H */
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