Defensive coding in update SQL, drop indexes before trying to create …

…them.

administrator/components/com_fabrik/sql/updates/mysql/3.4.sql

@@ -1,21 +1,37 @@
+DROP INDEX IF EXISTS showinsummary ON `#__fabrik_elements`;
+DROP INDEX IF EXISTS plugin ON `#__fabrik_elements`;
+DROP INDEX IF EXISTS join_checked_out ON `#__fabrik_elements`;
+DROP INDEX IF EXISTS join_group_id ON `#__fabrik_elements`;
+DROP INDEX IF EXISTS parent_id ON `#__fabrik_elements`;
 CREATE INDEX showinsummary ON `#__fabrik_elements` (show_in_list_summary);
 CREATE INDEX plugin ON `#__fabrik_elements` (plugin(10));
 CREATE INDEX join_checked_out ON `#__fabrik_elements` (checked_out);
 CREATE INDEX join_group_id ON `#__fabrik_elements` (group_id);
 CREATE INDEX parent_id ON `#__fabrik_elements` (parent_id);
 
+DROP INDEX IF EXISTS join_group_id ON `#__fabrik_formgroup`;
+DROP INDEX IF EXISTS join_form_id ON `#__fabrik_formgroup`;
+DROP INDEX IF EXISTS ordering ON `#__fabrik_formgroup`;
 CREATE INDEX join_group_id ON `#__fabrik_formgroup` (group_id);
 CREATE INDEX join_form_id ON `#__fabrik_formgroup` (form_id);
 CREATE INDEX ordering ON `#__fabrik_formgroup` (ordering);
 
+DROP INDEX IF EXISTS published ON `#__fabrik_groups`;
 CREATE INDEX published ON `#__fabrik_groups` (published);
 
+DROP INDEX IF EXISTS list_id ON `#__fabrik_joins`;
+DROP INDEX IF EXISTS element_id ON `#__fabrik_joins`;
+DROP INDEX IF EXISTS group_id ON `#__fabrik_joins`;
+DROP INDEX IF EXISTS table_join ON `#__fabrik_joins`;
 CREATE INDEX list_id ON `#__fabrik_joins` (list_id);
 CREATE INDEX element_id ON `#__fabrik_joins` (element_id);
 CREATE INDEX group_id ON `#__fabrik_joins` (group_id);
 CREATE INDEX table_join ON `#__fabrik_joins` (table_join(100));
 
+DROP INDEX IF EXISTS published ON `#__fabrik_forms`;
+DROP INDEX IF EXISTS form_id ON `#__fabrik_lists`;
 CREATE INDEX published ON `#__fabrik_forms` (published);
 CREATE INDEX form_id ON `#__fabrik_lists` (form_id);
 
+DROP INDEX IF EXISTS element_id ON `#__fabrik_jsactions`;
 CREATE INDEX element_id ON `#__fabrik_jsactions` (element_id);