Database edit tables updates and fixes, remove all zero size index files

4dev/database/function/edit_log_partition_insert.sql

@@ -1,3 +1,10 @@
+-- AUTHOR: Clemens Schwaighofer
+-- DATE: 2018-07-17
+-- DESCRIPTION:
+-- partition the edit_log table by year
+-- auto creates table if missing, if failure writes to overflow table
+-- HISTORY:
+
 CREATE OR REPLACE FUNCTION edit_log_insert_trigger ()
 RETURNS TRIGGER AS
 $$
@@ -6,20 +13,38 @@ DECLARE
 	end_date DATE;
 	timeformat TEXT := 'YYYY';
 	selector TEXT := 'year';
+	base_table TEXT := 'edit_log_';
 	_interval INTERVAL;
+	_interval_next INTERVAL;
 	table_name TEXT;
 BEGIN
-	-- get year and month from edit_log date so we can build the target edit_log table
-
-	-- move interval
-	_interval := '1 ' || selector;
-	-- current table name
-	table_name := 'edit_log_' || to_char(NEW.event_date, timeformat);
-
 	-- we are in valid start time area
 	IF (NEW.event_date >= start_date) THEN
+		-- move interval
+		_interval := '1 ' || selector;
+		-- current table name
+		table_name := base_table || to_char(NEW.event_date, timeformat);
 		BEGIN
 			EXECUTE 'INSERT INTO ' || quote_ident(table_name) || ' SELECT ($1).*' USING NEW;
+			-- check if next month table exists
+			table_name := base_table || to_char((SELECT NEW.event_date + _interval)::DATE, timeformat);
+			-- RAISE NOTICE 'SEARCH NEXT: %', table_name;
+			IF  (SELECT to_regclass(table_name)) IS NULL THEN
+				-- move outer interval
+				_interval_next := '2 ' || selector;
+				-- move inner interval same
+				start_date := date_trunc(selector, NEW.event_date + _interval);
+				end_date := date_trunc(selector, NEW.event_date + _interval_next);
+				-- RAISE NOTICE 'CREATE NEXT: %', table_name;
+				-- create table
+				EXECUTE 'CREATE TABLE IF NOT EXISTS ' || quote_ident(table_name) || ' ( CHECK ( event_date >= ' || quote_literal(start_date) || ' AND event_date < ' || quote_literal(end_date) || ' ) ) INHERITS (edit_log)';
+				-- create all indexes and triggers
+				EXECUTE 'ALTER TABLE ' || quote_ident(table_name) || ' ADD PRIMARY KEY (edit_log_id)';
+				-- FK constraints
+				EXECUTE 'ALTER TABLE ' || quote_ident(table_name) || ' ADD CONSTRAINT fk_' || quote_ident(table_name) || '_euid_fkey FOREIGN KEY (euid) REFERENCES edit_user (edit_user_id) MATCH FULL ON UPDATE CASCADE ON DELETE CASCADE';
+				-- generic trigger
+				EXECUTE 'CREATE TRIGGER trg_' || quote_ident(table_name) || ' BEFORE INSERT OR UPDATE ON ' || quote_ident(table_name) || ' FOR EACH ROW EXECUTE PROCEDURE set_edit_generic()';
+			END IF;
 		-- if insert failed because of missing table, create new below
 		EXCEPTION
 		WHEN undefined_table THEN