Re: Views With Unions

Stephan Szabo wrote:

>On Thu, 31 Jul 2003, Christopher Browne wrote:
>
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>>  select * from log_table where request_time between 'june 11 2003' and
>>                                                   'june 12 2003';
>>
>>returns a plan:
>>Subquery Scan log_table  (cost=0.00..10950.26 rows=177126 width=314)
>>  ->  Append  (cost=0.00..10950.26 rows=177126 width=314)
>>        ->  Subquery Scan *SELECT* 1  (cost=0.00..3089.07 rows=50307 width=71)
>>              ->  Seq Scan on log_table_1  (cost=0.00..3089.07 rows=50307 width=71)
>>        ->  Subquery Scan *SELECT* 2  (cost=0.00..602.92 rows=9892 width=314)
>>              ->  Seq Scan on log_table_2  (cost=0.00..602.92 rows=9892 width=314)
>>        ->  Subquery Scan *SELECT* 3  (cost=0.00..2390.09 rows=39209 width=314)
>>              ->  Seq Scan on log_table_3  (cost=0.00..2390.09 rows=39209 width=314)
>>
>>
>
>What version are you using?  In 7.3 and up it should be willing to
>consider moving the clause down, unless there's something like a type
>mismatch (because in that case it may not be equivalent without a bunch
>more work on the clause).
>
Dear Chris,

 I had the same problem(type mismatch)  and it was  solved finally.
check the list
"factoring problem ... "  subject only 2 weeks back .

regds
mallah.


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>
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>---------------------------(end of broadcast)---------------------------
>TIP 9: the planner will ignore your desire to choose an index scan if your
>      joining column's datatypes do not match
>
>