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fix pgsql index and foreign key drops

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This commit is contained in:
steffen123 2010-07-31 23:55:05 +02:00
parent b4ff46ec4f
commit ed239668c0
1 changed files with 4 additions and 0 deletions
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4
pyfpdb/Database.py
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@ -951,6 +951,7 @@ class Database:
# hmmm, tested by commenting out rollback in grapher. lock seems to work but
# then drop still hangs :-( does work in some tests though??
# will leave code here for now pending further tests/enhancement ...
c.execute("BEGIN TRANSACTION")
c.execute( "lock table %s in exclusive mode nowait" % (fk['fktab'],) )
#print "after lock, status:", c.statusmessage
#print "alter table %s drop constraint %s_%s_fkey" % (fk['fktab'], fk['fktab'], fk['fkcol'])
@ -961,6 +962,7 @@ class Database:
if "does not exist" not in str(sys.exc_value):
print "warning: drop pg fk %s_%s_fkey failed: %s, continuing ..." \
% (fk['fktab'], fk['fkcol'], str(sys.exc_value).rstrip('\n') )
c.execute("END TRANSACTION")
except:
print "warning: constraint %s_%s_fkey not dropped: %s, continuing ..." \
% (fk['fktab'],fk['fkcol'], str(sys.exc_value).rstrip('\n'))
@ -984,6 +986,7 @@ class Database:
print "dropping pg index ", idx['tab'], idx['col']
try:
# try to lock table to see if index drop will work:
c.execute("BEGIN TRANSACTION")
c.execute( "lock table %s in exclusive mode nowait" % (idx['tab'],) )
#print "after lock, status:", c.statusmessage
try:
@ -995,6 +998,7 @@ class Database:
if "does not exist" not in str(sys.exc_value):
print "warning: drop index %s_%s_idx failed: %s, continuing ..." \
% (idx['tab'],idx['col'], str(sys.exc_value).rstrip('\n'))
c.execute("END TRANSACTION")
except:
print "warning: index %s_%s_idx not dropped %s, continuing ..." \
% (idx['tab'],idx['col'], str(sys.exc_value).rstrip('\n'))