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Rationalize handling of VacuumParams

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This commit refactors the vacuum routines that rely on VacuumParams,
adding const markers where necessary to force a new policy in the code.
This structure should not use a pointer as it may be used across
multiple relations, and its contents should never be updated.
vacuum_rel() stands as an exception as it touches the "index_cleanup"
and "truncate" options.

VacuumParams has been introduced in 0d83138974, and 661643deda has
fixed a bug impacting VACUUM operating on multiple relations.  The
changes done in tableam.h break ABI compatibility, so this commit can
only happen on HEAD.

Author: Shihao Zhong <zhong950419@gmail.com>
Co-authored-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Reviewed-by: Junwang Zhao <zhjwpku@gmail.com>
Discussion: https://postgr.es/m/CAGRkXqTo+aK=GTy5pSc-9cy8H2F2TJvcrZ-zXEiNJj93np1UUw@mail.gmail.com
This commit is contained in:
Michael Paquier
2025-06-30 15:42:50 +09:00
parent 5ba00e175a
commit 2252fcd427
8 changed files with 98 additions and 110 deletions
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6
src/include/commands/vacuum.h
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@@ -336,7 +336,7 @@ extern PGDLLIMPORT int64 parallel_vacuum_worker_delay_ns;
/* in commands/vacuum.c */
extern void ExecVacuum(ParseState *pstate, VacuumStmt *vacstmt, bool isTopLevel);
extern void vacuum(List *relations, VacuumParams *params,
extern void vacuum(List *relations, const VacuumParams params,
BufferAccessStrategy bstrategy, MemoryContext vac_context,
bool isTopLevel);
extern void vac_open_indexes(Relation relation, LOCKMODE lockmode,
@@ -357,7 +357,7 @@ extern void vac_update_relstats(Relation relation,
bool *frozenxid_updated,
bool *minmulti_updated,
bool in_outer_xact);
extern bool vacuum_get_cutoffs(Relation rel, const VacuumParams *params,
extern bool vacuum_get_cutoffs(Relation rel, const VacuumParams params,
struct VacuumCutoffs *cutoffs);
extern bool vacuum_xid_failsafe_check(const struct VacuumCutoffs *cutoffs);
extern void vac_update_datfrozenxid(void);
@@ -398,7 +398,7 @@ extern void parallel_vacuum_main(dsm_segment *seg, shm_toc *toc);
/* in commands/analyze.c */
extern void analyze_rel(Oid relid, RangeVar *relation,
VacuumParams *params, List *va_cols, bool in_outer_xact,
const VacuumParams params, List *va_cols, bool in_outer_xact,
BufferAccessStrategy bstrategy);
extern bool std_typanalyze(VacAttrStats *stats);