2026-03-12 20:23:15

tpt/trim_database.sql

@@ -0,0 +1,28 @@
+-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
+-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
+
+-- script	: trim_database.sql
+-- purpose	: print alter database commands for trimming database files
+-- author	: tanel poder 2006
+-- issues	: doesnt resize tablespaces with no extents in them at all
+
+with query as (
+    select /*+ NO_MERGE MATERIALIZE */ 
+        file_id, 
+        tablespace_name,
+        max(block_id + blocks) highblock
+    from 
+        dba_extents
+    group by 
+        file_id, tablespace_name
+)
+select 
+    'alter database datafile '|| q.file_id || ' resize ' || ceil ((q.highblock * t.block_size + t.block_size)/1024)  || 'K;' cmd
+from 
+    query q,
+    dba_tablespaces t
+where
+    q.tablespace_name = t.tablespace_name;
+
+
+