Ticket #11519: schema_dump_performance_improvements.diff

oracle_adapter.rb

@@ -299 +299 @@
-          select_one("select sys_context('userenv','db_name') db from dual")["db"]
-        end
-
+        # changed select from user_tables to all_tables - much faster in large data dictionaries
-        def tables(name = nil) #:nodoc:
-user_tables
+all_tables where owner = sys_context('userenv','session_user')
-            tabs << t.to_a.first.last
-          end
-        end
@@ -411 +412 @@
-        def pk_and_sequence_for(table_name)
-          (owner, table_name) = @connection.describe(table_name)
-
+          # changed select from all_constraints to user_constraints - much faster in large data dictionaries
-          pks = select_values(<<-SQL, 'Primary Key')
-            select cc.column_name
-all
+user
-             where c.owner = '#{owner}'
-               and c.table_name = '#{table_name}'
-               and c.constraint_type = 'P'
@@ -430 +432 @@
-            structure << "create sequence #{seq.to_a.first.last};\n\n"
-          end
-
-
+
+
-            ddl = "create table #{table.to_a.first.last} (\n "
-            cols = select_all(%Q{
-              select column_name, data_type, data_length, data_precision, data_scale, data_default, nullable
@@ -461 +464 @@
-            drop << "drop sequence #{seq.to_a.first.last};\n\n"
-          end
-
-
+
+
-            drop << "drop table #{table.to_a.first.last} cascade constraints;\n\n"
-          end
-        end