r20119 - gnucash/trunk/src/backend/dbi - Provide for safely overwriting a sql database by moving the existing

[John Ralls]

Author: jralls
Date: 2011-01-17 19:36:08 -0500 (Mon, 17 Jan 2011)
New Revision: 20119
Trac: http://svn.gnucash.org/trac/changeset/20119

Modified:
   gnucash/trunk/src/backend/dbi/gnc-backend-dbi-priv.h
   gnucash/trunk/src/backend/dbi/gnc-backend-dbi.c
   gnucash/trunk/src/backend/dbi/test/test-dbi-basic.c
   gnucash/trunk/src/backend/dbi/test/test-dbi-stuff.c
   gnucash/trunk/src/backend/dbi/test/test-dbi-stuff.h
Log:
Provide for safely overwriting a sql database by moving the existing 
tables out of the way, writing new tables, and then dropping the old 
tables once everything has been saved.