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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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8
src/include/executor/spi.h
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@ -111,7 +111,7 @@ extern int SPI_finish(void);
extern int SPI_execute(const char *src, bool read_only, long tcount);
extern int SPI_execute_extended(const char *src,
const SPIExecuteOptions *options);
extern int SPI_execute_plan(SPIPlanPtr plan, Datum *Values, const char *Nulls,
extern int SPI_execute_plan(SPIPlanPtr plan, const Datum *Values, const char *Nulls,
bool read_only, long tcount);
extern int SPI_execute_plan_extended(SPIPlanPtr plan,
const SPIExecuteOptions *options);
@ -122,13 +122,13 @@ extern int SPI_exec(const char *src, long tcount);
extern int SPI_execp(SPIPlanPtr plan, Datum *Values, const char *Nulls,
long tcount);
extern int SPI_execute_snapshot(SPIPlanPtr plan,
Datum *Values, const char *Nulls,
const Datum *Values, const char *Nulls,
Snapshot snapshot,
Snapshot crosscheck_snapshot,
bool read_only, bool fire_triggers, long tcount);
extern int SPI_execute_with_args(const char *src,
int nargs, Oid *argtypes,
Datum *Values, const char *Nulls,
const Datum *Values, const char *Nulls,
bool read_only, long tcount);
extern SPIPlanPtr SPI_prepare(const char *src, int nargs, Oid *argtypes);
extern SPIPlanPtr SPI_prepare_cursor(const char *src, int nargs, Oid *argtypes,
@ -172,7 +172,7 @@ extern void SPI_freetuple(HeapTuple tuple);
extern void SPI_freetuptable(SPITupleTable *tuptable);
extern Portal SPI_cursor_open(const char *name, SPIPlanPtr plan,
Datum *Values, const char *Nulls, bool read_only);
const Datum *Values, const char *Nulls, bool read_only);
extern Portal SPI_cursor_open_with_args(const char *name,
const char *src,
int nargs, Oid *argtypes,