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Message Posted: Tue, 26 Sep 2006 @ 12:39:43 GMT


     
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Subj:   Re: Statistics expert needed
 
From:   Stubbs, Donald

Here's a macro I made from some of Dieter's sql. It takes all the stats from one database and generates the collect stats statements for the to database. I works great for me.

     REPLACE MACRO  gen_db_collstats
        ( ToDBName       (varchar(30), default ' '),
          FromDBName     (varchar(30), default ' ')
        )
     AS (


       /*  much thanks to Dieter Noth  */


     select trim(chartext) (title '')
       from (

     select  'collect statistics on '
                 || trim(:ToDBName) || '.' || trim(tablename)
                 || case when statstype = 'i' then ' index ('
                         else                      ' column ('
                    end
                 || trim(columnname) || ');'  (named chartext, char(2000))
       from (


       /*  much thanks to Dieter Noth  */


      SELECT DatabaseName      as databasename,
             TableName         as tablename,
             ColumnName        as columnname,

               /** Number of columns within MultiColumn or Index stats **/
             ColumnCount,

               /** stats collected on:
                  'C' --> Column
                  'I' --> Index
                  'M' --> Multiple columns (V2R5)
               **/
             StatsType         as statstype,

               /** collect stats date **/
             CollectDate       as collectdate,

               /** collect stats time **/
             CollectTime       as collecttime,

             CollectTimestamp  as collecttimestamp,

               /** Time needed to collect stats **/
               /*  CollectDuration,*/

               /** Version
                   1: pre-V2R5
                   2: V2R5
               **/
             StatsVersion      as statsversion,

               /** V2R5: sample size used for collect stats**/
             SampleSize        as samplesize,

               /** Row Count, Estimated when SampleSize < 100 **/
             NumRows           as numrows,

               /** Distinct Values, Estimated when SampleSize < 100 **/
             NumValues         as numvalues,

               /** Number of NULLs, Estimated when SampleSize < 100 **/
             NumNulls          as numnulls,

               /** Frequency of Mode / value, Estimated when SampleSize < 100 **/
             ModeFreq          as modefreq

        FROM
            (
             SELECT DatabaseName   as databasename,
                    TableName      as tablename,
                    ColumnName     as columnname,
                    ColumnCount    as columncount,
                    Stats          as stats,
                    StatsType      as statstype,

                    (
                      (HASHBUCKET
                        (SUBSTR(Stats, 2, 1) ||
                         SUBSTR(Stats, 1, 1) (BYTE(4))
                        )  - 1900
                      ) * 10000
                      +
                      (HASHBUCKET
                        ('00'xb || SUBSTR(Stats, 3, 1) (BYTE(4))
                        )
                      ) * 100
                      +
                      (HASHBUCKET
                        (
                         '00'xb || SUBSTR(Stats, 4, 1) (BYTE(4))
                        )
                      ) (DATE)
                    ) AS CollectDate,

                    (
                      (HASHBUCKET
                        (CAST('00'xb || SUBSTR(Stats, 5, 1) AS BYTE(4))
                        ) (FORMAT '99:')
                      ) ||
                      (HASHBUCKET
                        (CAST('00'xb || SUBSTR(Stats, 6, 1) AS BYTE(4))
                        ) (FORMAT '99:')
                      ) ||
                      (HASHBUCKET
                        (CAST('00'xb || SUBSTR(Stats, 7, 1) AS BYTE(4))
                        ) (FORMAT '99.')
                      ) ||
                      (HASHBUCKET
                        (CAST('00'xb || SUBSTR(Stats, 8, 1) AS BYTE(4))
                        ) (FORMAT '99')
                      ) (TIME(2))
                    ) AS CollectTime,

                    CAST(CollectDate AS TimeStamp(2))
                      + ((CollectTime - time '00:00:00') hour to second)
                    AS CollectTimestamp,

                    HASHBUCKET (SUBSTR(Stats, 9+1, 1)
                             || SUBSTR(Stats, 9+0, 1) (BYTE(4)))
                    AS StatsVersion,

                      /** V2R5: sample size used for collect stats**/
                    CASE WHEN HASHBUCKET ('00'xb || SUBSTR(Stats, 11, 1) (BYTE(4))) = 1
                         THEN HASHBUCKET ('00'xb || SUBSTR(Stats, 12, 1) (BYTE(4)))
                         ELSE 100
                    END AS SampleSize,

                    HASHBUCKET(SUBSTR(Stats, 13+7, 1)
                            || SUBSTR(Stats, 13+6, 1) (BYTE(4))) AS NumNullsw1,
                    HASHBUCKET(SUBSTR(Stats, 13+5, 1)
                            || SUBSTR(Stats, 13+4, 1) (BYTE(4))) AS NumNullsw2,
                    HASHBUCKET(SUBSTR(Stats, 13+3, 1)
                            || SUBSTR(Stats, 13+2, 1) (BYTE(4))) AS NumNullsw3,
                    HASHBUCKET(SUBSTR(Stats, 13+1, 1)
                            || SUBSTR(Stats, 13+0, 1) (BYTE(4))) AS NumNullsw4,

                    (-1**(NumNullsw1 / 32768))
                    * (2**((NumNullsw1/16 MOD 2048) - 1023))
                    * (1 + ((NumNullsw1 MOD 16) * 2**-4) + (NumNullsw2 * 2**-20)
                         + (NumNullsw3 * 2**-36) + (NumNullsw4 * 2**-52)) (DECIMAL(18,0))    AS NumNulls,

                      /** Numbers are stored AS Floats after the data and data may be 16 or 32 BYTEs **/
                      /** depending on BYTE[23]**/
                    CASE WHEN SUBSTR(Stats, 23, 1) = '00'XB THEN 16 ELSE 0 END               AS Offset,

                    HASHBUCKET(SUBSTR(Stats, 41+Offset+7, 1)
                            || SUBSTR(Stats, 41+Offset+6, 1) (BYTE(4))) AS ModeFreqw1,
                    HASHBUCKET(SUBSTR(Stats, 41+Offset+5, 1)
                            || SUBSTR(Stats, 41+Offset+4, 1) (BYTE(4))) AS ModeFreqw2,
                    HASHBUCKET(SUBSTR(Stats, 41+Offset+3, 1)
                            || SUBSTR(Stats, 41+Offset+2, 1) (BYTE(4))) AS ModeFreqw3,
                    HASHBUCKET(SUBSTR(Stats, 41+Offset+1, 1)
                            || SUBSTR(Stats, 41+Offset+0, 1) (BYTE(4))) AS ModeFreqw4,

                    (-1**(ModeFreqw1 / 32768))
                    * (2**((ModeFreqw1/16 MOD 2048) - 1023))
                    * (1 + ((ModeFreqw1 MOD 16) * 2**-4) + (ModeFreqw2 * 2**-20)
                         + (ModeFreqw3 * 2**-36) + (ModeFreqw4 * 2**-52)) (DECIMAL(18,0))    AS ModeFreq,

                    HASHBUCKET(SUBSTR(Stats, 49+Offset+7, 1)
                            || SUBSTR(Stats, 49+Offset+6, 1) (BYTE(4))) AS NumValuesw1,
                    HASHBUCKET(SUBSTR(Stats, 49+Offset+5, 1)
                            || SUBSTR(Stats, 49+Offset+4, 1) (BYTE(4))) AS NumValuesw2,
                    HASHBUCKET(SUBSTR(Stats, 49+Offset+3, 1)
                            || SUBSTR(Stats, 49+Offset+2, 1) (BYTE(4))) AS NumValuesw3,
                    HASHBUCKET(SUBSTR(Stats, 49+Offset+1, 1)
                            || SUBSTR(Stats, 49+Offset+0, 1) (BYTE(4))) AS NumValuesw4,

                    (-1**(NumValuesw1 / 32768))
                    * (2**((NumValuesw1/16 MOD 2048) - 1023))
                    * (1 + ((NumValuesw1 MOD 16) * 2**-4) + (NumValuesw2 * 2**-20)
                         + (NumValuesw3 * 2**-36) + (NumValuesw4 * 2**-52))(DECIMAL(18,0))     AS NumValues,

                    HASHBUCKET(SUBSTR(Stats, 57+Offset+7, 1)
                            || SUBSTR(Stats, 57+Offset+6, 1) (BYTE(4))) AS NumRowsw1,
                    HASHBUCKET(SUBSTR(Stats, 57+Offset+5, 1)
                            || SUBSTR(Stats, 57+Offset+4, 1) (BYTE(4))) AS NumRowsw2,
                    HASHBUCKET(SUBSTR(Stats, 57+Offset+3, 1)
                            || SUBSTR(Stats, 57+Offset+2, 1) (BYTE(4))) AS NumRowsw3,
                    HASHBUCKET(SUBSTR(Stats, 57+Offset+1, 1)
                            || SUBSTR(Stats, 57+Offset+0, 1) (BYTE(4))) AS NumRowsw4,

                    (-1**(NumRowsw1 / 32768))
                    * (2**((NumRowsw1/16 MOD 2048) - 1023))
                    * (1 + ((NumRowsw1 MOD 16) * 2**-4) + (NumRowsw2 * 2**-20)
                         + (NumRowsw3 * 2**-36) + (NumRowsw4 * 2**-52)) (DECIMAL(18,0))     AS NumRows

               FROM
                    (
                     SELECT DatabaseName    as databasename,
                            TableName       as tablename,

                      /** Concat up to 16 columnnames into a comma delimited list **/
                            MAX(CASE WHEN ColumnPosition = 1  THEN        '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 2  THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 3  THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 4  THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 5  THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 6  THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 7  THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 8  THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 9  THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 10 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 11 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 12 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 13 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 14 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 15 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 16 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 17 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 18 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 19 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 20 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 21 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 22 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 23 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 24 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 25 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 26 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 27 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 28 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 29 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 30 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 31 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 32 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 33 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 34 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 35 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 36 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 37 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 38 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 39 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 40 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 41 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 42 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 43 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 44 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 45 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 46 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 47 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 48 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 49 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 50 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 51 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 52 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 53 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 54 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 55 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 56 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 57 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 58 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 59 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 60 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 61 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 62 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 63 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 64 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition > 64 THEN ',...' ELSE '' END)
                            AS ColumnName,

                            COUNT(*) AS ColumnCount,

                            'I' AS StatsType,

                              /** Floats are stored after the data and data may be 16 or 32 bytes **/
                              /** depending on byte[23]**/
                            MAX(CASE WHEN SUBSTR(IndexStatistics, 23, 1) = '00'XB THEN 16 ELSE 0 END) AS Offset,

                            MAX(SUBSTR(IndexStatistics, 1, 80)) AS Stats

                       FROM dbc.IndexStats
                      where indextype in ('p','q','s','n','k','v','h','o')
                        and databasename in (:FromDBName)
                      GROUP BY DatabaseName,
                               TableName,
                               StatsType,
                               IndexNumber

               /*  include statement below to find indexes with existing statistics   */
               /*
                     HAVING Stats IS NOT NULL
               */
                     UNION ALL

                       /*Remove for pre-V2R5 --> **/
                     SELECT DatabaseName  as databasename,
                            TableName     as tablename,

                      /** Concat up to 16 columnnames into a comma delimited list **/
                            MAX(CASE WHEN ColumnPosition = 1 THEN         '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 2 THEN ','  || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 3 THEN ','  || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 4 THEN ','  || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 5 THEN ','  || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 6 THEN ','  || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 7 THEN ','  || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 8 THEN ','  || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 9 THEN ','  || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 10 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 11 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 12 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 13 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 14 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 15 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 16 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 17 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 18 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 19 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 20 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 21 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 22 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 23 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 24 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 25 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 26 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 27 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 28 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 29 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 30 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 31 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 32 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 33 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 34 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 35 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 36 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 37 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 38 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 39 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 40 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 41 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 42 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 43 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 44 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 45 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 46 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 47 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 48 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 49 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 50 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 51 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 52 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 53 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 54 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 55 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 56 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 57 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 58 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 59 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 60 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 61 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 62 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 63 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition = 64 THEN ',' || '"' || TRIM(ColumnName) || '"'  ELSE '' END) ||
                            MAX(CASE WHEN ColumnPosition > 64  THEN ',...' ELSE '' END)
                            AS ColumnName,

                            COUNT(*) AS ColumnCount,

                            'M' AS StatsType,

                              /** Floats are stored after the data and data may be 16 or 32 bytes **/
                              /** depending on byte[23]**/
                            MAX(CASE WHEN SUBSTR(ColumnsStatistics, 23, 1) = '00'XB THEN 16 ELSE 0 END) AS Offset,

                            MAX(SUBSTR(ColumnsStatistics, 1, 80)) AS Stats

                       FROM dbc.MultiColumnStats
                      where databasename in (:FromDBName)
                      GROUP BY DatabaseName,
                               TableName,
                               StatsType,
                               StatisticsID
                     HAVING Stats IS NOT NULL

                     UNION ALL
                       /*  * <-- Remove for pre-V2R5 **/

                     SELECT DatabaseName                     as databasename,
                            TableName                        as tablename,
                            '"' || TRIM(ColumnName) || '"'   as columnname,
                            1                                AS ColumnCount,
                            'C'                              AS StatsType,

                              /** Floats are stored after the data and data may be 16 or 32 bytes **/
                              /** depending on byte[23]**/
                            CASE WHEN SUBSTR(fieldStatistics, 23, 1) = '00'XB THEN 16 ELSE 0 END AS Offset,

                            SUBSTR(fieldstatistics, 1, 80)   AS Stats

                       FROM dbc.ColumnStats
                      where databasename in (:FromDBName)
                        and Stats IS NOT NULL
                     ) dt
              ) dt




           )pds1
           )pds2
        ORDER BY 1
     ;

      );

Don Stubbs



     
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