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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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2
src/test/modules/spgist_name_ops/spgist_name_ops.c
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@@ -94,7 +94,7 @@ commonPrefix(const char *a, const char *b, int lena, int lenb)
* On success, *i gets the match location; on failure, it gets where to insert
*/
static bool
searchChar(Datum *nodeLabels, int nNodes, int16 c, int *i)
searchChar(const Datum *nodeLabels, int nNodes, int16 c, int *i)
{
int StopLow = 0,
StopHigh = nNodes;