Predefined transformations for drop/create index?

Hi,
I want to add pre/postmap transformations for dropping/recreating indexes in the target table, for performance reasons.
I can't find any predefined transformations for this (such as WB_DISABLE/ENABLE_ALL_CONSTRAINTS for constraints). It seems I have to program this myself (dynamic PL/SQL for reuse with other tables seems the logical choice), but it seems such a dumb oversight - has Oracle really not supplied predefined transformations for this? It must be an extremely common need in ETL?
Regards,
Kai Quale
University of Oslo

On further thought, one needs more information than the table name to (re)create an index. (That's actually one of my pet peeves against Oracle - that you can't enable/disable indexes in the same way as constraints.)
Offhand, the only solution I see is to store index metainformation in a separate table, write custom procedures for disabling FKs/dropping indexes and enabling FKs/creating indexes, using the metatable.
It is a pretty common task in data warehousing - disable FK/drop index => run mapping => enable FK/create index. How do people do this in OWB?
Regards,
Kai

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there is a situation that I didnt understand.
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or
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sybrand_b,
when i run
Lock Table MyTable in exclusive mode;command, it succeeded. I can lock the table if you mean that or if you are saying even if that command runs very well, because of in doubt transaction, oracle will take the lock back, that could be. but as i said lock table command succeeded.
and there is an another situation here, there is no any other database ? I mean, how could an in doubt transaction happen. there are dblinks but they do not even query that table.
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Edited by: Mustafa KALAYCI on 17.Şub.2012 13:48

Performance issue with drop and re-create index

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Firstly the indexes are different index1 is only on the time column, where as index2 is a composite index consisting of 3 columns.
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3/31
Original
Elapsed: 00:01:02.17
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=6553 Card=9240 Bytes
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1 0 SORT (UNIQUE) (Cost=6553 Card=9240 Bytes=203280)
2 1 INDEX (FULL SCAN) OF 'EVENT_NA_TIME_ETYPE' (NON-UNIQ
UE) (Cost=15982 Card=2306303 Bytes=50738666)
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Elapsed: 00:00:11.91
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=7792 Card=9275 Bytes
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1 0 SORT (UNIQUE) (Cost=7792 Card=9275 Bytes=204050)
2 1 TABLE ACCESS (BY INDEX ROWID) OF 'EVENT' (Cost=2092
Card=2284254 Bytes=50253588)
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BEGIN
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end;
Elapsed: 00:00:05.14
Execution Plan
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4/3
Elapsed: 00:00:09.70
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=6596 Card=9316 Bytes
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1 0 SORT (UNIQUE) (Cost=6596 Card=9316 Bytes=204952)
2 1 INDEX (FULL SCAN) OF 'EVENT_NA_TIME_ETYPE' (NON-UNIQ
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0 recursive calls
0 db block gets
11933 consistent gets
9676 physical reads
724 redo size
467 bytes sent via SQL*Net to client
503 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
3 rows processed
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Elapsed: 00:00:17.99
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=6681 Card=9421 Bytes
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UE) (Cost=12110 Card=2433800 Bytes=53543600)
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0 recursive calls
0 db block gets
12279 consistent gets
9423 physical reads
2608 redo size
467 bytes sent via SQL*Net to client
503 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
1 sorts (memory)
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INDEX_NAME CLUSTERING_FACTOR BLEVEL LEAF_BLOCKS DISTINCT_KEYS
EVENT_NA_TIME_ETYPE 2393170 2 12108 2395545
EVENT_PK 32640 2 5313 2286158
EVENT_TIME_NDX 35673 2 7075 2394055

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System: Oracle Enterprise Edition 10g (10.1.0.4.0)
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user9198889 wrote:
my temp tablespace is 32GB and index estimated to be as big as 55GB , do i need more temp space? i.e at least 55GB? yes

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