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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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6
doc/src/sgml/spi.sgml
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@@ -846,7 +846,7 @@ int SPI_execute_extended(const char *<parameter>command</parameter>,
<synopsis>
int SPI_execute_with_args(const char *<parameter>command</parameter>,
int <parameter>nargs</parameter>, Oid *<parameter>argtypes</parameter>,
Datum *<parameter>values</parameter>, const char *<parameter>nulls</parameter>,
const Datum *<parameter>values</parameter>, const char *<parameter>nulls</parameter>,
bool <parameter>read_only</parameter>, long <parameter>count</parameter>)
</synopsis>
</refsynopsisdiv>
@@ -1671,7 +1671,7 @@ bool SPI_is_cursor_plan(SPIPlanPtr <parameter>plan</parameter>)
<refsynopsisdiv>
<synopsis>
int SPI_execute_plan(SPIPlanPtr <parameter>plan</parameter>, Datum * <parameter>values</parameter>, const char * <parameter>nulls</parameter>,
int SPI_execute_plan(SPIPlanPtr <parameter>plan</parameter>, const Datum * <parameter>values</parameter>, const char * <parameter>nulls</parameter>,
bool <parameter>read_only</parameter>, long <parameter>count</parameter>)
</synopsis>
</refsynopsisdiv>
@@ -2317,7 +2317,7 @@ Portal SPI_cursor_open(const char * <parameter>name</parameter>, SPIPlanPtr <par
Portal SPI_cursor_open_with_args(const char *<parameter>name</parameter>,
const char *<parameter>command</parameter>,
int <parameter>nargs</parameter>, Oid *<parameter>argtypes</parameter>,
Datum *<parameter>values</parameter>, const char *<parameter>nulls</parameter>,
const Datum *<parameter>values</parameter>, const char *<parameter>nulls</parameter>,
bool <parameter>read_only</parameter>, int <parameter>cursorOptions</parameter>)
</synopsis>
</refsynopsisdiv>