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Change Adjust_lo_type() so that it doesn't cause an error

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even when cast functions are allowed to be volatile.
This commit is contained in:
Hiroshi Inoue 2003-01-13 04:28:55 +00:00
parent 9e66243c35
commit de432ce39e
1 changed files with 71 additions and 54 deletions
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125
src/bin/pg_dump/pg_backup_archiver.c
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@ -15,7 +15,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_backup_archiver.c,v 1.64 2003/01/03 18:05:02 inoue Exp $
* $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_backup_archiver.c,v 1.65 2003/01/13 04:28:55 inoue Exp $
*
*-------------------------------------------------------------------------
*/
@ -123,82 +123,99 @@ CloseArchive(Archive *AHX)
}
/*
* Adjust lo type in contrib for 7.3 or later.
* There must be a cast between lo and oid.
* This function repairs a slip when upgrading PG cast
* mechanism from 7.2 or earlier to 7.3 or later.
* The casts between lo and oid are needed when retrieving
* lo type data in FixupBlobRefs and so adjust lo type in
* contrib before processing FixupBlobRefs.
*/
static void
Adjust_lo_type(ArchiveHandle *AH)
{
PGresult *res;
int nTuples;
/*
* The cast function lo(oid) should be immutable.
* If it's volatile it should be changed to
* be immutable and the cast (oid as lo)
* should be created.
* First check the existence of the cast oid as lo.
*/
res = PQexec(AH->blobConnection, "begin;"
"update pg_proc set provolatile = 'i'"
res = PQexec(AH->blobConnection, "select 1 from pg_cast where"
" castsource in (select oid from pg_type where typname = 'oid')"
" and casttarget in (select oid from pg_type where typname = 'lo')");
if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
die_horribly(AH, modulename, "error while checking the cast oid as lo\n");
nTuples = PQntuples(res);
PQclear(res);
if (nTuples == 0)
{
/*
* Check the existence of the cast function lo(oid)
* and change it to be IMMUTABLE.
*/
res = PQexec(AH->blobConnection, "update pg_proc set provolatile = 'i'"
" where proname = 'lo'"
" and pronargs = 1"
" and provolatile = 'v'"
" and prorettype in (select oid from pg_type where typname = 'lo')"
" and proargtypes[0] in (select oid from pg_type where typname = 'oid')");
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
die_horribly(AH, modulename, "could not adjust lo(oid) function");
if (strcmp(PQcmdTuples(res), "1") == 0)
{
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
die_horribly(AH, modulename, "could not adjust lo(oid) function\n");
nTuples = atoi(PQcmdTuples(res));
PQclear(res);
/* create cast */
res = PQexec(AH->blobConnection, "create cast"
" (oid as lo) with function lo(oid) as implicit;commit");
if (!res)
die_horribly(AH, modulename, "couldn't create cast (oid as lo)");
if (nTuples == 1)
{
/*
* The cast function lo(oid) exists and
* then create the correspoding cast.
*/
res = PQexec(AH->blobConnection, "create cast"
" (oid as lo) with function lo(oid) as implicit");
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
die_horribly(AH, modulename, "couldn't create cast (oid as lo)\n");
PQclear(res);
}
}
else
{
PQclear(res);
/* The change is needless */
res = PQexec(AH->blobConnection, "rollback");
if (!res)
die_horribly(AH, modulename, "rollback error");
}
PQclear(res);
/*
* The cast function oid(lo) should be immutable.
* If it's volatile it should be changed to
* be immutable and the cast (lo as oid)
* should be created.
/*
* Also check the existence of the cast lo as oid.
*/
res = PQexec(AH->blobConnection, "begin;"
"update pg_proc set provolatile = 'i'"
res = PQexec(AH->blobConnection, "select 1 from pg_cast where"
" castsource in (select oid from pg_type where typname = 'lo')"
" and casttarget in (select oid from pg_type where typname = 'oid')");
if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
die_horribly(AH, modulename, "error while checking the cast lo as oid\n");
nTuples = PQntuples(res);
PQclear(res);
if (nTuples == 0)
{
/*
* Check the existence of the cast function oid(lo)
* and change it to be IMMUTABLE.
*/
res = PQexec(AH->blobConnection, "update pg_proc set provolatile = 'i'"
" where proname = 'oid'"
" and provolatile = 'v'"
" and pronargs = 1"
" and prorettype in (select oid from pg_type where typname = 'oid')"
" and proargtypes[0] in (select oid from pg_type where typname = 'lo')");
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
die_horribly(AH, modulename, "could not adjust oid(lo) function");
if (strcmp(PQcmdTuples(res), "1") == 0)
{
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
die_horribly(AH, modulename, "could not adjust oid(lo) function\n");
nTuples = atoi(PQcmdTuples(res));
PQclear(res);
/* create cast */
res = PQexec(AH->blobConnection, "create cast"
" (lo as oid) with function oid(lo) as implicit;commit");
if (!res)
die_horribly(AH, modulename, "couldn't create cast (lo as oid)");
if (nTuples == 1)
{
/*
* The cast function oid(lo) exists and
* then create the correspoding cast.
*/
res = PQexec(AH->blobConnection, "create cast"
" (lo as oid) with function oid(lo) as implicit");
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
die_horribly(AH, modulename, "couldn't create cast (lo as oid)\n");
PQclear(res);
}
}
else
{
PQclear(res);
/* the change is needless */
res = PQexec(AH->blobConnection, "rollback");
if (!res)
die_horribly(AH, modulename, "rollback error");
}
PQclear(res);
}
/* Public */