ABAP Select data from SAP table COMPCMPB 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 COMPCMPB 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 COMPCMPB. 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 COMPCMPB 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_COMPCMPB TYPE STANDARD TABLE OF COMPCMPB,
      WA_COMPCMPB TYPE COMPCMPB,
      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: <COMPCMPB> TYPE COMPCMPB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COMPCMPB
*  INTO TABLE @DATA(IT_COMPCMPB2).
*--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_COMPCMPB INDEX 1 INTO DATA(WA_COMPCMPB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_COMPCMPB ASSIGNING <COMPCMPB>.
*To update a field value using a field symbol simply change the value via the field symbol pointer
<COMPCMPB>-MANDT = 1.
<COMPCMPB>-COMPNUM = 1.
<COMPCMPB>-COMPCNT = 1.
<COMPCMPB>-VSNMR1 = 1.
<COMPCMPB>-RSNUM1 = 1.
ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COMPCMPB-RSPOS1, sy-vline,
WA_COMPCMPB-RSART1, sy-vline,
WA_COMPCMPB-AUFPL1, sy-vline,
WA_COMPCMPB-APLZL1, sy-vline,
WA_COMPCMPB-DBSKZ1, sy-vline,
WA_COMPCMPB-VSNMR2, sy-vline.
ENDLOOP. *Add any further fields from structure WA_COMPCMPB 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_COMPCMPB 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_COMPCMPB INTO WA_COMPCMPB. *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.

*Conversion exit ALPHA, internal->external for field AENNR CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_COMPCMPB-AENNR IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_COMPCMPB-AENNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. *&---------------------------------------------------------------------* *& Form process_as_string_field_values *&---------------------------------------------------------------------* FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO. TYPES: BEGIN OF T_COMPCMPB_STR,
MANDT TYPE STRING,
COMPNUM TYPE STRING,
COMPCNT TYPE STRING,
VSNMR1 TYPE STRING,
RSNUM1 TYPE STRING,
RSPOS1 TYPE STRING,
RSART1 TYPE STRING,
AUFPL1 TYPE STRING,
APLZL1 TYPE STRING,
DBSKZ1 TYPE STRING,
VSNMR2 TYPE STRING,
RSNUM2 TYPE STRING,
RSPOS2 TYPE STRING,
RSART2 TYPE STRING,
AUFPL2 TYPE STRING,
APLZL2 TYPE STRING,
DBSKZ2 TYPE STRING,
RESULT TYPE STRING,
CONFTYP TYPE STRING,
STATUS TYPE STRING,
MOVED TYPE STRING,
EXKEY TYPE STRING,
AENNR TYPE STRING,
UPDIND TYPE STRING,END OF T_EKKO_STR. DATA: WA_COMPCMPB_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_COMPCMPB_STR-MANDT sy-vline
WA_COMPCMPB_STR-COMPNUM sy-vline
WA_COMPCMPB_STR-COMPCNT sy-vline
WA_COMPCMPB_STR-VSNMR1 sy-vline
WA_COMPCMPB_STR-RSNUM1 sy-vline
WA_COMPCMPB_STR-RSPOS1 sy-vline
WA_COMPCMPB_STR-RSART1 sy-vline
WA_COMPCMPB_STR-AUFPL1 sy-vline
WA_COMPCMPB_STR-APLZL1 sy-vline
WA_COMPCMPB_STR-DBSKZ1 sy-vline
WA_COMPCMPB_STR-VSNMR2 sy-vline
WA_COMPCMPB_STR-RSNUM2 sy-vline
WA_COMPCMPB_STR-RSPOS2 sy-vline
WA_COMPCMPB_STR-RSART2 sy-vline
WA_COMPCMPB_STR-AUFPL2 sy-vline
WA_COMPCMPB_STR-APLZL2 sy-vline
WA_COMPCMPB_STR-DBSKZ2 sy-vline
WA_COMPCMPB_STR-RESULT sy-vline
WA_COMPCMPB_STR-CONFTYP sy-vline
WA_COMPCMPB_STR-STATUS sy-vline
WA_COMPCMPB_STR-MOVED sy-vline
WA_COMPCMPB_STR-EXKEY sy-vline
WA_COMPCMPB_STR-AENNR sy-vline
WA_COMPCMPB_STR-UPDIND sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.