2026-03-12 20:23:15

tpt/hinth.sql

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+-- 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.
+
+--------------------------------------------------------------------------------
+--
+-- File name:   hinth.sql (Hint Hierarchy)
+--
+-- Purpose:     Display the areas / features in Oracle kernel that a hint affects
+--              (displayed as a feature/module hierarchy)
+--
+-- Author:      Tanel Poder
+-- Copyright:   (c) http://www.tanelpoder.com
+--              
+-- Usage:       @hinth <hint_name>
+--              @hinth MERGE
+--          
+-- Other:       Requires Oracle 11g+
+--
+--------------------------------------------------------------------------------
+
+COL sqlfh_feature HEAD SQL_FEATURE FOR A55
+COL hinth_path HEAD PATH FOR A150
+COL hinth_name HEAD NAME FOR A35
+
+PROMPT Display Hint feature hierarchy for hints like &1
+
+WITH feature_hierarchy AS (
+SELECT 
+    f.sql_feature
+  , SYS_CONNECT_BY_PATH(REPLACE(f.sql_feature, 'QKSFM_', ''), ' -> ') path
+FROM 
+    v$sql_feature f
+  , v$sql_feature_hierarchy fh 
+WHERE 
+    f.sql_feature = fh.sql_feature 
+CONNECT BY fh.parent_id = PRIOR f.sql_Feature 
+START WITH fh.sql_feature = 'QKSFM_ALL'
+)
+SELECT
+    hi.name hinth_name
+  , REGEXP_REPLACE(fh.path, '^ -> ', '') hinth_path
+  , DECODE(BITAND(target_level,1),1,'STATEMENT ')    ||
+    DECODE(BITAND(target_level,2),2,'QBLOCK ')  ||
+    DECODE(BITAND(target_level,4),4,'OBJECT ')  ||
+    DECODE(BITAND(target_level,8),8,'JOIN ') hint_scope
+FROM
+    v$sql_hint hi
+  , feature_hierarchy fh
+WHERE
+    hi.sql_feature = fh.sql_feature
+--    hi.sql_feature = REGEXP_REPLACE(fh.sql_feature, '_[[:digit:]]+$')
+AND UPPER(hi.name) LIKE UPPER('%&1%')
+ORDER BY
+    path
+  --name
+/
+