#106559 follow-up by Josh Waihi: Fix typo preventing Drupal from installing on PostgreSQL.

modules/system/system.install

@@ -340,7 +340,7 @@ function system_install() {
       LANGUAGE \'sql\''
     );
 
-    db_query('CREATE OR REPLACE FUNCTION "substr_index"(text, text, integer) RETURNS text AS
+    db_query('CREATE OR REPLACE FUNCTION "substring_index"(text, text, integer) RETURNS text AS
       \'SELECT array_to_string((string_to_array($1, $2)) [1:$3], $2);\'
       LANGUAGE \'sql\''
     );
@@ -3516,7 +3516,7 @@ function system_update_7024() {
   $ret = array();
 
   if (db_driver() == 'pgsql') {
-    $ret[] = update_sql('CREATE OR REPLACE FUNCTION "substr_index"(text, text, integer) RETURNS text AS
+    $ret[] = update_sql('CREATE OR REPLACE FUNCTION "substring_index"(text, text, integer) RETURNS text AS
       \'SELECT array_to_string((string_to_array($1, $2)) [1:$3], $2);\'
       LANGUAGE \'sql\''
     );