2026-03-12 20:23:15

vg/columns_diff.sql

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+@@header
+
+
+set term off
+/*
+*
+*  Author     : Vishal Gupta
+*  Purpose    : Display column differences between two tables
+*  Parameters : 1 - Source Object (In OWNER.OBJECT_NAME format)
+*               2 - Target Object (In OWNER.OBJECT_NAME format)
+*
+*  Revision History:
+*  ===================
+*  Date       Author        Description
+*  ---------  ------------  -----------------------------------------
+*  05-May-15  Vishal Gupta  Converted INNER JOIN to FULL OUTER JOIN
+*  21-Dec-12  Vishal Gupta  Created
+*
+*/
+set term on
+
+
+/************************************
+*  INPUT PARAMETERS
+************************************/
+
+UNDEFINE source
+UNDEFINE target
+
+DEFINE source="&&1"
+DEFINE target="&&2"
+
+UNDEFINE source_owner
+UNDEFINE source_object
+UNDEFINE target_owner
+UNDEFINE target_object
+
+set term off
+COLUMN  _source_owner      NEW_VALUE source_owner    NOPRINT
+COLUMN  _source_object     NEW_VALUE source_object   NOPRINT
+COLUMN  _target_owner      NEW_VALUE target_owner    NOPRINT
+COLUMN  _target_object     NEW_VALUE target_object   NOPRINT
+
+SELECT SUBSTR(UPPER('&&source'), 1 , INSTR('&&source','.') - 1 ) "_source_owner"
+     , SUBSTR(UPPER('&&source'), INSTR('&&source','.') + 1 )     "_source_object"
+     , SUBSTR(UPPER('&&target'), 1 , INSTR('&&target','.') - 1 ) "_target_owner"
+     , SUBSTR(UPPER('&&target'), INSTR('&&target','.') + 1 )     "_target_object"
+FROM DUAL;
+set term on
+
+PROMPT *****************************************************************
+PROMPT * COLUMNS DIFFERENCES
+PROMPT * 
+PROMPT * Input Parameters 
+PROMPT *  - Source      = '&&source_owner..&&source_object'
+PROMPT *  - Target      = '&&target_owner..&&target_object'
+PROMPT *****************************************************************
+
+
+COLUMN source_object       HEADING "SourceObject"       FORMAT a40
+COLUMN Target_object       HEADING "TargetObject"       FORMAT a40
+COLUMN Source_Type         HEADING "Source DataType"    FORMAT a20
+COLUMN Target_Type         HEADING "Target DataType"    FORMAT a20
+COLUMN source_nullable     HEADING "Source|Null?"       FORMAT a8
+COLUMN target_nullable     HEADING "Target|Null?"       FORMAT a8
+COLUMN source_column_id    HEADING "Source|Id"          FORMAT 99999
+COLUMN target_column_id    HEADING "Target|Id"          FORMAT 99999
+COLUMN source_column_name  HEADING "Source Column Name" FORMAT A30
+COLUMN target_column_name  HEADING "Target Column Name" FORMAT A30
+
+
+SELECT * FROM 
+(
+SELECT --a.owner  || '.' ||  a.table_name     source_object
+     --, b.owner  || '.' ||  b.table_name     target_object
+     --, 
+       a.column_id                          source_column_id
+     , a.column_name                        source_column_name
+     , DECODE(a.nullable,'N','NOT NULL','') source_nullable
+     , CASE 
+          WHEN a.data_type = 'NUMBER'  
+               THEN a.data_type || NVL2(a.data_precision,'(' || a.data_precision || ',' || a.data_scale || ')','')
+          WHEN a.data_type = 'FLOAT' 
+               THEN a.data_type || NVL2(a.data_precision,'(' || a.data_precision || ')','')
+          WHEN a.data_type = 'VARCHAR2' OR  a.data_type = 'CHAR' 
+               THEN a.data_type || '(' || a.char_length || ' ' ||  DECODE(a.char_used,'B','BYTE','CHAR') || ')'
+          WHEN a.data_type = 'NVARCHAR2' OR  a.data_type = 'NCHAR' 
+               THEN a.data_type || '(' || a.char_length ||  ')'
+          WHEN a.data_type = 'RAW' OR a.data_type = 'UROWID'
+               THEN a.data_type || '(' || a.data_length || ')' 
+          ELSE  a.data_type
+       END  source_Type 
+     , b.column_id                           target_column_id
+     , b.column_name                         target_column_name
+     , DECODE(b.nullable,'N','NOT NULL','')  target_nullable
+     , CASE 
+           WHEN b.data_type = 'NUMBER'  
+                THEN b.data_type || NVL2(b.data_precision,'(' || b.data_precision || ',' || b.data_scale || ')','')
+           WHEN b.data_type = 'FLOAT' 
+                THEN b.data_type || NVL2(b.data_precision,'(' || b.data_precision || ')','')
+           WHEN b.data_type = 'VARCHAR2' OR  b.data_type = 'CHAR' 
+                THEN b.data_type || '(' || b.char_length || ' ' ||  DECODE(b.char_used,'B','BYTE','CHAR') || ')'
+           WHEN b.data_type = 'NVARCHAR2' OR  b.data_type = 'NCHAR' 
+                THEN b.data_type || '(' || b.char_length ||  ')'
+           WHEN b.data_type = 'RAW' OR b.data_type = 'UROWID'
+                THEN b.data_type || '(' || b.data_length || ')' 
+           ELSE  b.data_type
+        END                                    target_type
+FROM             (SELECT * FROM dba_tab_columns WHERE owner= '&&source_owner' AND TABLE_NAME = '&&source_object')  a
+FULL OUTER JOIN  (SELECT * FROM dba_tab_columns WHERE owner= '&&target_owner' AND TABLE_NAME = '&&target_object')  B  
+     ON a.column_name = b.column_name 
+)
+WHERE NVL(source_Type,'x')     <> NVL(target_type,'x')
+   OR NVL(source_nullable,'x') <> NVL(target_nullable,'x')
+   OR source_column_id         <> target_column_id
+ORDER BY NVL(source_column_id,target_column_id)
+;
+
+@@footer