Using Lookup

Question

Post Author: jeff.p18
CA Forum: Data Integration
Hello (mother-tongue = french)
I'm a BODI beginner and I often have things lije this to code :
            SELECT gd.num_ecrou_ini, ae.dat_epreuve, ae.cod_diplome, u2018Ru2019, 2
            FROM gdet_det gd,
            atf_expertise ae,
            t_ods_w_diplome wde
            WHERE gd.num_ecro_cou = ae.num_ecro_cou
      AND gd.num_ecro_cou = (         SELECT max(gd2.num_ecro_cou)
                                                     FROM gdet_det gd2
                                                     WHERE gd2.num_ecro_ini = gd. num_ecro_ini   )
            AND gd.num_ecrou_ini not in (   SELECT wde2.num_ecrou_ini
                                   FROM t_ods_w_diplome wde2  )
            AND 2 < = (      SELECT min(hd2.priorite)
                                   FROM t_ods_h_diplome hd2
                                   WHERE hd2.num_ecrou_init = gd.num_ecrou_ini)
      AND gd.num_ecro_cou = (         SELECT max(ae2.dat_expertise)
                                                     FROM gdet_det ae2
                                                     WHERE ae2.num_ecro_cou = ae. num_ecro_cou  )
I wonder if it is recommended to use lookup to implement it in BODI.
Look at my where clause in BODI :
GDET_DET_1.NUM_ECRO_COU = ATF_EXPERTISE_1.NUM_ECRO_COU ANDlookup_ext(&#91;ds_ods_info_penit.SCOTT.T_ODS_W_DIPLOME,'PRE_LOAD_CACHE','MAX'&#93;,    &#91;NUM_ECRO_INI&#93;,&#91;0&#93;,&#91;NUM_ECRO_INI,'=',GDET_DET_1.NUM_ECRO_INI&#93;) = 0 ANDlookup_ext(&#91;ds_ods_info_penit.SCOTT.T_ODS_H_DIPLOME,'PRE_LOAD_CACHE','MIN'&#93;,    &#91;PRIORITE&#93;,&#91;9&#93;,&#91;NUM_ECROU_INIT,'=',GDET_DET_1.NUM_ECRO_INI&#93;) >= 2 ANDlookup_ext(&#91;ds_source_gide_source.dbo.GDET_DET,'PRE_LOAD_CACHE','MAX'&#93;,   &#91;NUM_ECRO_COU&#93;,&#91;NULL&#93;,&#91;NUM_ECRO_INI,'=',GDET_DET_1.NUM_ECRO_INI&#93;) = GDET_DET_1.NUM_ECRO_COU ANDlookup_ext(&#91;ds_source_gide_source.dbo.ATF_EXPERTISE,'PRE_LOAD_CACHE','MAX'&#93;,   &#91;DAT_EXPERTISE&#93;,&#91;NULL&#93;,&#91;NUM_ECRO_COU,'=',GDET_DET_1.NUM_ECRO_COU&#93;) = ATF_EXPERTISE_1.DAT_EXPERTISE
It is working but should i choose another way to do that ?
subsidiary question : does BODI use Oracle analytical function to perform that ?
Thanks in advance
+

Answer 1

Hi jimmy5495,
According to your description, it seems like you don’t know how to correctly use Lookup function. Based on my research, Lookup function is not supported to be used in a single textbox that means outside Data Grid with multiple datasets environment. Because
in a single textbox with multiple datasets environment, it only supports Aggregate functions when we want to use fields in it. While Aggregate functions are not allowed inside the Destination or Result expressions of a Lookup function.
We can add the expression in a table textbox in the design surface, then delete the other cells. While if we want to add this expression in page header, since page header can only contain static items, I think we could achieve this goal in current release
of Reporting Services.
References:
Aggregate Functions Reference (Report Builder and SSRS)
Page Headers and Footers (Report Builder and SSRS)
Regards,
Katherine Xiong
Katherine Xiong
TechNet Community Support