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Message Posted: Tue, 29 Jul 2008 @ 10:41:59 GMT


     
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Subj:   Rows not found during join
 
From:   Rose, Benjamin

I am trying to update a table (Table1) using a join on the PI. I have created a temp table (Table2) with the same PI, using data from the original table.

     UPDATE t1
     FROM
          Table1 t1,
          Table2 t2

     SET
          t1.consumer_count = t2.consumer_count

     WHERE
          T1.table1_id = t2.table1_id;

Table1 has about 70k rows.

Table2 has about 64k rows.

Every record in Table2 has a corresponding table1_id in table1, and the id is unique on both tables.

All data types match, and column stats on both PIs are current.

I expect the update statement to update 64k rows, but it only updates 2,910 rows.

I have also tried making a copy of table1 (table1_alt) in case there was a row locking issue, but got the same result when I tried to update the alternate table.

Does anyone know what could be causing this, or how I can update the expected number of rows?


Thanks,

Ben



     
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