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Provide a parenthesized-options syntax for VACUUM, analogous to that recently

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adopted for EXPLAIN.  This will allow additional options to be implemented
in future without having to make them fully-reserved keywords.  The old syntax
remains available for existing options, however.

Itagaki Takahiro
This commit is contained in:
Tom Lane
2009-11-16 21:32:07 +00:00
parent 49ed392cd8
commit 5e66a51c2e
13 changed files with 146 additions and 74 deletions
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41
src/backend/commands/vacuum.c
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@@ -13,7 +13,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.395 2009/11/10 18:00:06 alvherre Exp $
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.396 2009/11/16 21:32:06 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -289,14 +289,22 @@ void
vacuum(VacuumStmt *vacstmt, Oid relid, bool do_toast,
BufferAccessStrategy bstrategy, bool for_wraparound, bool isTopLevel)
{
const char *stmttype = vacstmt->vacuum ? "VACUUM" : "ANALYZE";
const char *stmttype;
volatile MemoryContext anl_context = NULL;
volatile bool all_rels,
in_outer_xact,
use_own_xacts;
List *relations;
if (vacstmt->verbose)
/* sanity checks on options */
Assert(vacstmt->options & (VACOPT_VACUUM | VACOPT_ANALYZE));
Assert((vacstmt->options & VACOPT_VACUUM) ||
!(vacstmt->options & (VACOPT_FULL | VACOPT_FREEZE)));
Assert((vacstmt->options & VACOPT_ANALYZE) || vacstmt->va_cols == NIL);
stmttype = (vacstmt->options & VACOPT_VACUUM) ? "VACUUM" : "ANALYZE";
if (vacstmt->options & VACOPT_VERBOSE)
elevel = INFO;
else
elevel = DEBUG2;
@@ -315,7 +323,7 @@ vacuum(VacuumStmt *vacstmt, Oid relid, bool do_toast,
*
* ANALYZE (without VACUUM) can run either way.
*/
if (vacstmt->vacuum)
if (vacstmt->options & VACOPT_VACUUM)
{
PreventTransactionChain(isTopLevel, stmttype);
in_outer_xact = false;
@@ -327,7 +335,7 @@ vacuum(VacuumStmt *vacstmt, Oid relid, bool do_toast,
* Send info about dead objects to the statistics collector, unless we are
* in autovacuum --- autovacuum.c does this for itself.
*/
if (vacstmt->vacuum && !IsAutoVacuumWorkerProcess())
if ((vacstmt->options & VACOPT_VACUUM) && !IsAutoVacuumWorkerProcess())
pgstat_vacuum_stat();
/*
@@ -378,11 +386,11 @@ vacuum(VacuumStmt *vacstmt, Oid relid, bool do_toast,
* transaction block, and also in an autovacuum worker, use own
* transactions so we can release locks sooner.
*/
if (vacstmt->vacuum)
if (vacstmt->options & VACOPT_VACUUM)
use_own_xacts = true;
else
{
Assert(vacstmt->analyze);
Assert(vacstmt->options & VACOPT_ANALYZE);
if (IsAutoVacuumWorkerProcess())
use_own_xacts = true;
else if (in_outer_xact)
@@ -438,11 +446,11 @@ vacuum(VacuumStmt *vacstmt, Oid relid, bool do_toast,
Oid relid = lfirst_oid(cur);
bool scanned_all = false;
if (vacstmt->vacuum)
if (vacstmt->options & VACOPT_VACUUM)
vacuum_rel(relid, vacstmt, do_toast, for_wraparound,
&scanned_all);
if (vacstmt->analyze)
if (vacstmt->options & VACOPT_ANALYZE)
{
MemoryContext old_context = NULL;
@@ -502,7 +510,7 @@ vacuum(VacuumStmt *vacstmt, Oid relid, bool do_toast,
StartTransactionCommand();
}
if (vacstmt->vacuum && !IsAutoVacuumWorkerProcess())
if ((vacstmt->options & VACOPT_VACUUM) && !IsAutoVacuumWorkerProcess())
{
/*
* Update pg_database.datfrozenxid, and truncate pg_clog if possible.
@@ -1034,7 +1042,7 @@ vacuum_rel(Oid relid, VacuumStmt *vacstmt, bool do_toast, bool for_wraparound,
*/
PushActiveSnapshot(GetTransactionSnapshot());
if (!vacstmt->full)
if (!(vacstmt->options & VACOPT_FULL))
{
/*
* In lazy vacuum, we can set the PROC_IN_VACUUM flag, which lets
@@ -1074,7 +1082,7 @@ vacuum_rel(Oid relid, VacuumStmt *vacstmt, bool do_toast, bool for_wraparound,
* vacuum, but just ShareUpdateExclusiveLock for concurrent vacuum. Either
* way, we can be sure that no other backend is vacuuming the same table.
*/
lmode = vacstmt->full ? AccessExclusiveLock : ShareUpdateExclusiveLock;
lmode = (vacstmt->options & VACOPT_FULL) ? AccessExclusiveLock : ShareUpdateExclusiveLock;
/*
* Open the relation and get the appropriate lock on it.
@@ -1186,7 +1194,7 @@ vacuum_rel(Oid relid, VacuumStmt *vacstmt, bool do_toast, bool for_wraparound,
/*
* Do the actual work --- either FULL or "lazy" vacuum
*/
if (vacstmt->full)
if (vacstmt->options & VACOPT_FULL)
heldoff = full_vacuum_rel(onerel, vacstmt);
else
heldoff = lazy_vacuum_rel(onerel, vacstmt, vac_strategy, scanned_all);
@@ -1331,8 +1339,11 @@ full_vacuum_rel(Relation onerel, VacuumStmt *vacstmt)
vacrelstats->hasindex, FreezeLimit);
/* report results to the stats collector, too */
pgstat_report_vacuum(RelationGetRelid(onerel), onerel->rd_rel->relisshared,
true, vacstmt->analyze, vacrelstats->rel_tuples);
pgstat_report_vacuum(RelationGetRelid(onerel),
onerel->rd_rel->relisshared,
true,
(vacstmt->options & VACOPT_ANALYZE) != 0,
vacrelstats->rel_tuples);
return heldoff;
}