2026-03-12 20:23:15

timhall/monitoring/undo_segments.sql

@@ -0,0 +1,21 @@
+-- -----------------------------------------------------------------------------------
+-- File Name    : https://oracle-base.com/dba/monitoring/undo_segments.sql
+-- Author       : Tim Hall
+-- Description  : Displays information about undo segments.
+-- Requirements : Access to the DBA views.
+-- Call Syntax  : @undo_segments {name | all}
+-- Last Modified: 20-APR-2021
+-- -----------------------------------------------------------------------------------
+
+set verify off linesize 100
+column owner format a30
+column segment_name format a30
+column segment_type format a20
+
+select owner,
+       segment_name,
+       segment_type
+from   dba_segments
+where  segment_type in ('TYPE2 UNDO','ROLLBACK')
+and    lower(segment_name) like '%' || decode(lower('&1'), 'all', '', lower('&1')) || '%'
+order by 1, 2;