--- a/tablecopy.py	Thu Dec 13 17:15:10 2012 +0100
+++ b/tablecopy.py	Mon Dec 17 16:48:12 2012 +0100
@@ -2,6 +2,7 @@
 #
 # Copy data between tables with same table schema.
 #
+# Copies full table, target table must be empty.
 # Can copy multiple tables in one run.
 # Sorts the tables according to references.
 #
@@ -17,20 +18,20 @@
 class TableCopyTool(toolbase.SrcDstTablesTool):
     def __init__(self):
         toolbase.SrcDstTablesTool.__init__(self, name='tablecopy', desc='Table copy tool.')
-        
+
         self.parser.add_argument('-n', '--no-action', dest='noaction', action='store_true',
             help="Do nothing, just print tables to be copied. Useful in combination with --regex.")
         self.parser.add_argument('--no-sort', dest='nosort', action='store_true',
             help="Do not sort. By default, tables are sorted by foreign key references.")
-        
+
         self.init()
 
     def main(self):
         self.srcconn = self.pgm.get_conn('src')
         self.dstconn = self.pgm.get_conn('dst')
-        
+
         dc = pgdatacopy.PgDataCopy(self.srcconn, self.dstconn)
-        
+
         if self.args.nosort:
             for table in self.tables():
                 self.copy_table(dc, *table)
@@ -39,7 +40,7 @@
             details = dict()
             pending = set()
             references = dict()
-            
+
             # build list of all table to be copied (pending) and references map
             for table in self.tables():
                 srcschema, srctable, dstschema, dsttable = table
@@ -47,7 +48,7 @@
                 details[name] = table
                 pending.add(name)
                 references[name] = self.get_references(dstschema, dsttable)
-            
+
             # copy files with fulfilled references, repeat until all done
             while pending:
                 for name in list(pending):
@@ -69,32 +70,32 @@
         print('Copying [%s] %s.%s --> [%s] %s.%s' % (
             self.args.src, srcschema, srctable,
             self.args.dst, dstschema, dsttable))
-        
+
         if self.args.noaction:
             return
-        
+
         dc.set_source(srctable, srcschema)
         dc.set_destination(dsttable, dstschema)
-        
+
         try:
             dc.check()
         except pgdatacopy.TargetNotEmptyError as e:
             print(' - error:', str(e))
             return
-        
+
         print(' - read                           ')
         buf = io.BytesIO()
         wrapped = ProgressWrapper(buf)
         dc.read(wrapped)
         data = buf.getvalue()
         buf.close()
-        
+
         print(' - write                          ')
         buf = io.BytesIO(data)
         wrapped = ProgressWrapper(buf, len(data))
         dc.write(wrapped)
         buf.close()
-        
+
         print(' - analyze                        ')
         dc.analyze()