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Add support for REFRESH MATERIALIZED VIEW CONCURRENTLY.

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This allows reads to continue without any blocking while a REFRESH
runs.  The new data appears atomically as part of transaction
commit.

Review questioned the Assert that a matview was not a system
relation.  This will be addressed separately.

Reviewed by Hitoshi Harada, Robert Haas, Andres Freund.
Merged after review with security patch f3ab5d4.
This commit is contained in:
Kevin Grittner
2013-07-16 12:55:44 -05:00
parent 7f7485a0cd
commit cc1965a99b
16 changed files with 644 additions and 57 deletions
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10
src/backend/executor/execMain.c
View File

@ -42,6 +42,7 @@
#include "access/transam.h"
#include "access/xact.h"
#include "catalog/namespace.h"
#include "commands/matview.h"
#include "commands/trigger.h"
#include "executor/execdebug.h"
#include "foreign/fdwapi.h"
@ -999,10 +1000,11 @@ CheckValidResultRel(Relation resultRel, CmdType operation)
}
break;
case RELKIND_MATVIEW:
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("cannot change materialized view \"%s\"",
RelationGetRelationName(resultRel))));
if (!MatViewIncrementalMaintenanceIsEnabled())
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("cannot change materialized view \"%s\"",
RelationGetRelationName(resultRel))));
break;
case RELKIND_FOREIGN_TABLE:
/* Okay only if the FDW supports it */