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/*
*
*  Author     : Vishal Gupta
*  Purpose    : Display Statistics of a table (including part, sub-par, ind, ind-part, ind-subpart)
*  Parameters : 1 - OWNER               (% - wildcard, \ - escape char, default is '%')
*               2 - Table Name          (% - wildcard, \ - escape char, default is '%') 
*               3 - Column Name         (% - wildcard, \ - escape char, default is '%') 
*               4 - days                (% - wildcard, \ - escape char, default is '7') 
*
*  Revision History:
*  ===================
*  Date       Author        Description
*  ---------  ------------  -----------------------------------------
*  29-Dec-16  Vishal Gupta  Change order by clause
*  13-Feb-14  Vishal Gupta  Created
*
*
*/


/************************************
*  INPUT PARAMETERS
************************************/
UNDEFINE owner
UNDEFINE table_name
UNDEFINE column_name
UNDEFINE days

DEFINE owner="&&1"
DEFINE table_name="&&2"
DEFINE column_name="&&3"
DEFINE days="&&4"


COLUMN  _owner             NEW_VALUE owner             NOPRINT
COLUMN  _table_name        NEW_VALUE table_name        NOPRINT
COLUMN  _column_name       NEW_VALUE column_name       NOPRINT
COLUMN  _days              NEW_VALUE days              NOPRINT

set term off
SELECT CASE 
           WHEN INSTR('&&owner','.') != 0 THEN SUBSTR(UPPER('&&owner'),1,INSTR('&&owner','.')-1) 
           ELSE DECODE(UPPER('&&owner'),'','%',UPPER('&&owner')) 
       END                                                                 "_owner"
     , CASE 
           WHEN INSTR('&&owner','.') != 0 THEN SUBSTR(UPPER('&&owner'),INSTR('&&owner','.')+1) 
           ELSE DECODE(UPPER('&&table_name'),'','%',UPPER('&&table_name')) 
       END                                                                 "_table_name"
     , DECODE('&&column_name','','%',UPPER('&&column_name'))               "_column_name"
     , DECODE('&&days','','7',UPPER('&&days'))                             "_days"
FROM DUAL;
set term on


PROMPT
PROMPT ***********************************************************************
PROMPT *  C O L U M N     S T A T I S T I C S    H I S T O R Y
PROMPT *
PROMPT *  Input Parameters 
PROMPT *  - Table Owner       = '&&owner'
PROMPT *  - Table Name        = '&&table_name'
PROMPT *  - Column Name       = '&&column_name'
PROMPT *  - Days Ago          = '&&days'
PROMPT ***********************************************************************

COLUMN object_name             HEADING "TableName"                FORMAT a45
COLUMN Object_type             HEADING "Object|Type"              FORMAT a8
COLUMN column_name             HEADING "ColumnName"               FORMAT a25
COLUMN global_stats            HEADING "G|l|o|b|a|l"              FORMAT a1  TRUNCATE
COLUMN last_analyzed           HEADING "LastAnalyzed"             FORMAT a18
COLUMN avgcln                  HEADING "Avg|Col|Len"              FORMAT 99999
COLUMN distcnt                 HEADING "NumDistinct"              FORMAT 9,999,999,999
COLUMN null_cnt                HEADING "NumNulls"                 FORMAT 9,999,999,999
COLUMN density                 HEADING "Density"                  FORMAT 9.999999999999999
COLUMN lowval                  HEADING "Low Value"                FORMAT a16
COLUMN hival                   HEADING "High Value"               FORMAT a16

SELECT c.owner || '.' || c.table_name|| NVL2(o.subobject_name,':' ||o.subobject_name,'')  object_name
     , c.column_name
     , TO_CHAR(s.savtime,'DD-MON-YY HH24:Mi:SS') last_analyzed
     , s.avgcln
     , s.null_cnt
     , s.distcnt
     , s.density
     --, s.lowval
     --, s.hival
     --, s.minimum
     --, s.maximum
  FROM dba_tab_columns c
       JOIN dba_objects o ON c.owner = o.owner AND c.table_name = o.object_name 
       JOIN sys.wri$_optstat_histhead_history s ON s.obj# = o.object_id  AND s.intcol# = c.column_id
 WHERE c.owner                      LIKE '&&owner'       ESCAPE '\'
   AND c.table_name                 LIKE '&&table_name'  ESCAPE '\'
   AND c.column_name                LIKE '&&column_name' ESCAPE '\'
   AND s.savtime > sysdate - &&days
ORDER BY object_name
       , c.column_name
       , s.savtime desc nulls last
/




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