In situation when user uninstalls older version of utPLSQL table is not dropped. Then when new version is installed manually without user creation, this script failed as table already exists in the schema.

Peter Ocelka · Peter Ocelka · commit 9bb79ab0d371 · 2018-05-04T17:39:14.000+02:00
diff --git a/source/core/ut_dbms_output_cache.sql b/source/core/ut_dbms_output_cache.sql
@@ -1,23 +1,38 @@
-create global temporary table ut_dbms_output_cache(
-  /*
-  utPLSQL - Version 3
-  Copyright 2016 - 2017 utPLSQL Project
-  Licensed under the Apache License, Version 2.0 (the "License"):
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-      http://www.apache.org/licenses/LICENSE-2.0
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-  */
-  /*
-  * This table is not a global temporary table as it needs to allow cross-session data exchange
-  * It is used however as a temporary table with multiple writers.
-  * This is why it has very high initrans and has nologging
-  */
-  seq_no         number(20,0) not null,
-  text           varchar2(4000),
-  constraint ut_dbms_output_cache_pk primary key(seq_no)
-) on commit preserve rows;
+/*
+utPLSQL - Version 3
+Copyright 2016 - 2017 utPLSQL Project
+Licensed under the Apache License, Version 2.0 (the "License"):
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+   http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+/*
+* This table is not a global temporary table as it needs to allow cross-session data exchange
+* It is used however as a temporary table with multiple writers.
+* This is why it has very high initrans and has nologging
+*/
+declare
+  l_tab_exist number;
+begin
+  select count(*) into l_tab_exist from 
+  (select table_name from all_tables where table_name = 'UT_DBMS_OUTPUT_CACHE' and owner = sys_context('USERENV','CURRENT_SCHEMA')
+   union all
+   select synonym_name from all_synonyms where synonym_name = 'UT_DBMS_OUTPUT_CACHE' and owner = sys_context('USERENV','CURRENT_SCHEMA'));
+  if l_tab_exist = 0 then
+  
+    execute immediate q'[create global temporary table ut_dbms_output_cache
+                        (
+                           seq_no         number(20,0) not null,
+                           text           varchar2(4000),
+                           constraint ut_dbms_output_cache_pk primary key(seq_no)
+                        ) on commit preserve rows
+                       ]';
+
+  end if;
+end;
+/
