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Extend CREATE DATABASE to allow selection of a template database to be

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cloned, rather than always cloning template1.  Modify initdb to generate
two identical databases rather than one, template0 and template1.
Connections to template0 are disallowed, so that it will always remain
in its virgin as-initdb'd state.  pg_dumpall now dumps databases with
restore commands that say CREATE DATABASE foo WITH TEMPLATE = template0.
This allows proper behavior when there is user-added data in template1.
initdb forced!
This commit is contained in:
Tom Lane
2000-11-14 18:37:49 +00:00
parent 8a9315ca92
commit 2cf48ca04b
23 changed files with 515 additions and 311 deletions
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15
src/backend/utils/misc/database.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/misc/Attic/database.c,v 1.40 2000/10/16 14:52:19 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/misc/Attic/database.c,v 1.41 2000/11/14 18:37:45 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -186,7 +186,7 @@ GetRawDatabaseInfo(const char *name, Oid *db_id, char *path)
max = PageGetMaxOffsetNumber(pg);
/* look at each tuple on the page */
for (i = 0; i <= max; i++)
for (i = 0; i < max; i++)
{
int offset;
@@ -221,8 +221,11 @@ GetRawDatabaseInfo(const char *name, Oid *db_id, char *path)
* database OID from a flat file, handled the same way we
* handle the password relation?
*/
if (TransactionIdIsValid((TransactionId) tup.t_data->t_xmax))
continue;
if (tup.t_data->t_infomask & HEAP_XMIN_INVALID)
continue; /* inserting xact known aborted */
if (TransactionIdIsValid((TransactionId) tup.t_data->t_xmax) &&
!(tup.t_data->t_infomask & HEAP_XMAX_INVALID))
continue; /* deleting xact happened, not known aborted */
/*
* Okay, see if this is the one we want.
@@ -241,6 +244,10 @@ GetRawDatabaseInfo(const char *name, Oid *db_id, char *path)
}
}
/* failed to find it... */
*db_id = InvalidOid;
*path = '\0';
done:
close(dbfd);
pfree(pg);