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Generalize concept of temporary relations to "relation persistence".

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This commit replaces pg_class.relistemp with pg_class.relpersistence;
and also modifies the RangeVar node type to carry relpersistence rather
than istemp.  It also removes removes rd_istemp from RelationData and
instead performs the correct computation based on relpersistence.

For clarity, we add three new macros: RelationNeedsWAL(),
RelationUsesLocalBuffers(), and RelationUsesTempNamespace(), so that we
can clarify the purpose of each check that previous depended on
rd_istemp.

This is intended as infrastructure for the upcoming unlogged tables
patch, as well as for future possible work on global temporary tables.
This commit is contained in:
Robert Haas
2010-12-13 12:34:26 -05:00
parent 0c90442355
commit 5f7b58fad8
48 changed files with 334 additions and 230 deletions
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2
src/backend/nodes/copyfuncs.c
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@ -958,7 +958,7 @@ _copyRangeVar(RangeVar *from)
COPY_STRING_FIELD(schemaname);
COPY_STRING_FIELD(relname);
COPY_SCALAR_FIELD(inhOpt);
COPY_SCALAR_FIELD(istemp);
COPY_SCALAR_FIELD(relpersistence);
COPY_NODE_FIELD(alias);
COPY_LOCATION_FIELD(location);

2
src/backend/nodes/equalfuncs.c
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@ -104,7 +104,7 @@ _equalRangeVar(RangeVar *a, RangeVar *b)
COMPARE_STRING_FIELD(schemaname);
COMPARE_STRING_FIELD(relname);
COMPARE_SCALAR_FIELD(inhOpt);
COMPARE_SCALAR_FIELD(istemp);
COMPARE_SCALAR_FIELD(relpersistence);
COMPARE_NODE_FIELD(alias);
COMPARE_LOCATION_FIELD(location);

3
src/backend/nodes/makefuncs.c
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@ -15,6 +15,7 @@
*/
#include "postgres.h"
#include "catalog/pg_class.h"
#include "catalog/pg_type.h"
#include "nodes/makefuncs.h"
#include "nodes/nodeFuncs.h"
@ -378,7 +379,7 @@ makeRangeVar(char *schemaname, char *relname, int location)
r->schemaname = schemaname;
r->relname = relname;
r->inhOpt = INH_DEFAULT;
r->istemp = false;
r->relpersistence = RELPERSISTENCE_PERMANENT;
r->alias = NULL;
r->location = location;

2
src/backend/nodes/outfuncs.c
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@ -841,7 +841,7 @@ _outRangeVar(StringInfo str, RangeVar *node)
WRITE_STRING_FIELD(schemaname);
WRITE_STRING_FIELD(relname);
WRITE_ENUM_FIELD(inhOpt, InhOption);
WRITE_BOOL_FIELD(istemp);
WRITE_CHAR_FIELD(relpersistence);
WRITE_NODE_FIELD(alias);
WRITE_LOCATION_FIELD(location);
}

2
src/backend/nodes/readfuncs.c
View File

@ -373,7 +373,7 @@ _readRangeVar(void)
READ_STRING_FIELD(schemaname);
READ_STRING_FIELD(relname);
READ_ENUM_FIELD(inhOpt, InhOption);
READ_BOOL_FIELD(istemp);
READ_CHAR_FIELD(relpersistence);
READ_NODE_FIELD(alias);
READ_LOCATION_FIELD(location);