ABAP Select data from SAP table MDEL into internal table

Get Example source ABAP code based on a different SAP table
  

Below is a number of ABAP code snippets to demonstrate how to select data from SAP MDEL table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to MDEL. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the MDEL table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_MDEL TYPE STANDARD TABLE OF MDEL,
      WA_MDEL TYPE MDEL,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <MDEL> TYPE MDEL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MDEL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MDEL
  INTO TABLE IT_MDEL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDEL
*  INTO TABLE @DATA(IT_MDEL2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_MDEL INDEX 1 INTO DATA(WA_MDEL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MDEL ASSIGNING <MDEL>.
*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDEL>-DELIN = 1.
<MDEL>-DAT00 = 1.
<MDEL>-PGHIX = 1.
<MDEL>-SIMUL = 1.
<MDEL>-PLAAB = 1.
ENDLOOP.

LOOP AT IT_MDEL INTO WA_MDEL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDEL-PLANR, sy-vline,
WA_MDEL-WRK02, sy-vline,
WA_MDEL-INTERN, sy-vline,
WA_MDEL-MNG01, sy-vline,
WA_MDEL-DELNR, sy-vline,
WA_MDEL-DELPS, sy-vline.
ENDLOOP. *Add any further fields from structure WA_MDEL you want to display... WRITE:/ sy-uline. * Aternatively use generic code to Write field values (and NAME) to screen report DO. ASSIGN COMPONENT sy-index OF STRUCTURE wa_MDEL TO <field>. IF sy-subrc <> 0. EXIT. ENDIF. WRITE:/ 'Field Value', <field>, sy-vline. gd_str = <field> . lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ). lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ). WRITE:/ 'Field Name', lv_fieldname. ENDDO. *Redo loop but convert all fields from internal to out value LOOP AT IT_MDEL INTO WA_MDEL. *Write horizonal line to screen report. WRITE:/ sy-uline. *Convert all fields to display/output versions using conversion routines PERFORM convert_all_field_values CHANGING wa_EKKO. ENDLOOP. *&---------------------------------------------------------------------* *& Form convert_all_field_values *&---------------------------------------------------------------------* FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO. DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. *&---------------------------------------------------------------------* *& Form process_as_string_field_values *&---------------------------------------------------------------------* FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO. TYPES: BEGIN OF T_MDEL_STR,
DELIN TYPE STRING,
DAT00 TYPE STRING,
PGHIX TYPE STRING,
SIMUL TYPE STRING,
PLAAB TYPE STRING,
PLANR TYPE STRING,
WRK02 TYPE STRING,
INTERN TYPE STRING,
MNG01 TYPE STRING,
DELNR TYPE STRING,
DELPS TYPE STRING,
DELET TYPE STRING,
AUSSL TYPE STRING,
OLDSL TYPE STRING,
BAART TYPE STRING,
VERSB TYPE STRING,
INDEX TYPE STRING,
LEAF_ TYPE STRING,
EXTRA TYPE STRING,END OF T_EKKO_STR. DATA: WA_MDEL_STR type T_EKKO_STR. DATA: ld_text TYPE string. LOOP AT IT_EKKO INTO WA_EKKO. MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR. CONCATENATE: sy-vline
WA_MDEL_STR-DELIN sy-vline
WA_MDEL_STR-DAT00 sy-vline
WA_MDEL_STR-PGHIX sy-vline
WA_MDEL_STR-SIMUL sy-vline
WA_MDEL_STR-PLAAB sy-vline
WA_MDEL_STR-PLANR sy-vline
WA_MDEL_STR-WRK02 sy-vline
WA_MDEL_STR-INTERN sy-vline
WA_MDEL_STR-MNG01 sy-vline
WA_MDEL_STR-DELNR sy-vline
WA_MDEL_STR-DELPS sy-vline
WA_MDEL_STR-DELET sy-vline
WA_MDEL_STR-AUSSL sy-vline
WA_MDEL_STR-OLDSL sy-vline
WA_MDEL_STR-BAART sy-vline
WA_MDEL_STR-VERSB sy-vline
WA_MDEL_STR-INDEX sy-vline
WA_MDEL_STR-LEAF_ sy-vline
WA_MDEL_STR-EXTRA sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.