Tunning - Select

Question

I have a applicaation that generate the SQL:
SELECT U_.OBJECTID, t.globalid FROM SDE_UUID_TEMP$ t LEFT OUTER JOIN (SELECT b.OBJECTID, b.GLOBALID FROM GIS_USER.FE_TRECHO b UNION SELECT a.OBJECTID, a.GLOBALID FROM GIS_USER.A132 a) U_ ON t.globalid = U_.GLOBALID WHERE t.registration_id = 132
This query execution is so long and I am having problem with this. The field GLOBALID is indexed and I don´t know how I can improve the performance!
Thanks!
Damata

Answer 1

The field GLOBALID is a CHAR(38 BYTE) and the application use this field as unique key. This field is used in all join tables. It was created two weeks ago and after that my process is to long time. Before create the field GLOBALID, the application used a OBJECID NUMBER(*,0) field and I didn´t have problem with perfomance.
I can´t change the globalid, so I need to improve the performance, but I don´t konw what I must do!
The plan execution is bellow:
SELECT STATEMENT     11          79116          
     HASH JOIN OUTER     10     5057977     711,278.016     79116     1108     14644183170     78455
TABLE ACCESS FULL      SDE_UUID_TEMP$     TABLE (TEMP)     1     100     8.887     2     1     31743     2
VIEW     9     5057977     261,789.825     79090     1108     14127254467     78453
SORT UNIQUE     8     5057977     222,274.380     79090     1108     13979454200     75907
UNION-ALL 7
TABLE ACCESS FULL     GIS_USER.FE_TRECHO     TABLE     2     5000956     219,768.574     40897     573     8039825842     40534
VIEW     GIS_USER.index$_join$_004     VIEW     6     57021     2,505.806     2143     31     74699774     2140
HASH JOIN 5          
INDEX FAST FULL SCAN     GIS_USER.A132_PK     INDEX (UNIQUE)     3     57021     2,505.806     242     4     16605720     241
INDEX FAST FULL SCAN     GIS_USER.UUID_132_A     INDEX     4     57021     2,505.806     1900     27     32754543     1899