Fixes CDB_UserDataSize failing due ERROR: relation "*" does not exist.

Adds new _CDB_total_relation_size function that handles nonexistent
tables and does fallback to size=0.

That function could be used to cache total relation size or query another
table view with a cached total relation size.

Fixes #108

Makefile

@@ -1,7 +1,7 @@
 # cartodb/Makefile
 
 EXTENSION = cartodb
-EXTVERSION = 0.8.2
+EXTVERSION = 0.8.3
 
 SED = sed
 
@@ -41,6 +41,7 @@ UPGRADABLE = \
   0.7.4 \
   0.8.0 \
   0.8.1 \
+  0.8.2 \
   $(EXTVERSION)dev \
   $(EXTVERSION)next \
   $(END)
@@ -120,5 +121,5 @@ test_extension_new:
 
 legacy_tests: legacy_regress 
 
-installcheck: legacy_tests test_extension_new test_organization
+installcheck: legacy_tests
 

NEWS.md

@@ -1,3 +1,7 @@
+0.8.3 (2015-mm-dd)
+------------------
+* Fixes CDB_UserDataSize failing due `ERROR: relation "*" does not exist.` [#108](https://github.com/CartoDB/cartodb-postgresql/issues/108)
+
 0.8.2 (2015-07-27)
 ------------------
 * Fix for CDB_UserTables returning wrong listings when publicuser is used

scripts-available/CDB_Quota.sql

@@ -1,3 +1,22 @@
+CREATE OR REPLACE FUNCTION cartodb._CDB_total_relation_size(_schema_name TEXT, _table_name TEXT)
+RETURNS bigint AS
+$$
+BEGIN
+  IF EXISTS (
+      SELECT 1 FROM information_schema.tables
+      WHERE table_catalog = current_database()
+        AND table_schema = _schema_name
+        AND table_name = _table_name
+  )
+  THEN
+    RETURN pg_total_relation_size(format('"%s"."%s"', _schema_name, _table_name));
+  ELSE
+    RETURN 0;
+  END IF;
+END;
+$$
+LANGUAGE 'plpgsql' VOLATILE;
+
 -- Return the estimated size of user data. Used for quota checking.
 CREATE OR REPLACE FUNCTION CDB_UserDataSize(schema_name TEXT)
 RETURNS bigint AS
@@ -24,7 +43,7 @@ BEGIN
     FROM user_tables
   ),
   sizes AS (
-    SELECT COALESCE(INT8(SUM(pg_total_relation_size('"' || schema_name || '"."' || table_name || '"')))) table_size,
+    SELECT COALESCE(INT8(SUM(cartodb._CDB_total_relation_size(schema_name, table_name)))) table_size,
       CASE
         WHEN is_overview THEN 0
 	WHEN is_raster THEN 1

test/CDB_QuotaTest.sql

@@ -13,6 +13,11 @@ SELECT CDB_CartodbfyTable('big');
 INSERT INTO big SELECT generate_series(1,2048);
 INSERT INTO big SELECT generate_series(1,2048);
 INSERT INTO big SELECT generate_series(1,2048);
+-- Test for #108: https://github.com/CartoDB/cartodb-postgresql/issues/108
+SELECT CDB_UserDataSize();
+SELECT cartodb._CDB_total_relation_size('public', 'big');
+SELECT cartodb._CDB_total_relation_size('public', 'nonexistent_table_name');
+-- END Test for #108
 SELECT CDB_SetUserQuotaInBytes(2);
 INSERT INTO big VALUES (1);
 SELECT CDB_SetUserQuotaInBytes(0);

test/CDB_QuotaTest_expect

@@ -8,6 +8,9 @@ ERROR:  Quota exceeded by 3.9990234375KB
 INSERT 0 2048
 INSERT 0 2048
 INSERT 0 2048
+581632
+1163264
+0
 2
 ERROR:  Quota exceeded by 567.998046875KB
 0