Dynamic table

[former_member1230623]

Hi,

I have created a dynamic table and i have given SELECT * FROM … Up to 20 rows and i got the data of 20 rows of the selected table but i only want first five fields how can i get it.

Regards,

Prateex

[lenastodal]

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[Preetha33]

Hi prateex,

Select required fields which we want to fetch from table we will get required fields data from table.

 data: lt_mara type STANDARD TABLE OF mara,
       ls_mara type mara.

 select matnr
        mbrsh
        matkl
        mtart
   from mara into CORRESPONDING FIELDS OF table lt_mara UP TO 20 rows.

write: 'Material Number',
       'Industry Sector',
       'Material Group',
       'Material type'.

loop at lt_mara into ls_mara.
  write: / ls_mara-matnr,
           ls_mara-mbrsh,
           ls_mara-matkl,
           ls_mara-mtart.
endloop.

Now, we will get only required fields from table and 20rows of data.

Reward points if helpful,

Thanks & Regards,

Preetha

[former_member1230623]

hi preetha,

here the table is dynamic we don't know which table we will use to fetch data, we enter table name in selection screen .

so we don't know the field names then how can we write them in select query.

[FredericGirod]

check the FM RFC_READ_TABLE

[ThorstenHoefer]

Hi Shiva,

please try this:

DATA: lr_tab_ref TYPE REF TO data,
      lr_struct  TYPE REF TO cl_abap_structdescr.
FIELD-SYMBOLS: <lt_tab> type any table.

lr_struct ?= cl_abap_structdescr=>describe_by_name( 'SFLIGHTS' ).

DATA(lt_comp) = lr_struct->get_components( ).

delete lt_comp from 6.

lr_struct = cl_abap_structdescr=>create( p_components = lt_comp ).


DATA(lr_tab) = cl_abap_tabledescr=>create( p_line_type  = lr_struct ).
CREATE DATA lr_tab_ref TYPE HANDLE lr_tab.
ASSIGN LR_TAB_REF->* to <lt_tab>.
SELECT *
  FROM ('SFLIGHTS')
  INTO CORRESPONDING FIELDS OF table @<lt_tab>
  up to 20 rows.

[Sandra_Rossi]

With SELECT * and a dynamic table (FROM (tablename)), although there's "into corresponding fields", is the SELECT sent to the database really limited to only the components of the internal table?

[ThorstenHoefer]

Hi Sandra,

this is a working example.I have tried it.

Best Regards

Thorsten

[Sandra_Rossi]

I didn't doubt that your code works fine, I was asking whether the SAP Database Interface does optimize the SQL request sent to the database.

Just checked with 7.52 + kernel 753 + S/4HANA, it successfully selects only the 5 columns which are in the internal table:

SELECT
  /* FDA READ */
  "MANDT" , "CARRID" , "CARRNAME" , "CONNID" , "COUNTRYFR"
FROM
  "SFLIGHTS"
WHERE
  "MANDT" = ?
LIMIT  20
  WITH RANGE_RESTRICTION('CURRENT')