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Mark function arguments of type "Datum *" as "const Datum *" where possible

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Several functions in the codebase accept "Datum *" parameters but do
not modify the pointed-to data.  These have been updated to take
"const Datum *" instead, improving type safety and making the
interfaces clearer about their intent.  This change helps the compiler
catch accidental modifications and better documents immutability of
arguments.

Most of "Datum *" parameters have a pairing "bool *isnull" parameter,
they are constified as well.

No functional behavior is changed by this patch.

Author: Chao Li <lic@highgo.com>
Discussion: https://www.postgresql.org/message-id/flat/CAEoWx2msfT0knvzUa72ZBwu9LR_RLY4on85w2a9YpE-o2By5HQ@mail.gmail.com
This commit is contained in:
Peter Eisentraut
2025-10-31 10:45:02 +01:00
parent aa4535307e
commit 8a27d418f8
34 changed files with 145 additions and 145 deletions
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4
src/backend/statistics/attribute_stats.c
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@@ -115,7 +115,7 @@ static void set_stats_slot(Datum *values, bool *nulls, bool *replaces,
Datum stanumbers, bool stanumbers_isnull,
Datum stavalues, bool stavalues_isnull);
static void upsert_pg_statistic(Relation starel, HeapTuple oldtup,
Datum *values, bool *nulls, bool *replaces);
const Datum *values, const bool *nulls, const bool *replaces);
static bool delete_pg_statistic(Oid reloid, AttrNumber attnum, bool stainherit);
static void init_empty_stats_tuple(Oid reloid, int16 attnum, bool inherited,
Datum *values, bool *nulls, bool *replaces);
@@ -819,7 +819,7 @@ set_stats_slot(Datum *values, bool *nulls, bool *replaces,
*/
static void
upsert_pg_statistic(Relation starel, HeapTuple oldtup,
Datum *values, bool *nulls, bool *replaces)
const Datum *values, const bool *nulls, const bool *replaces)
{
HeapTuple newtup;