ABAP Select data from SAP table MDLB 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 MDLB 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 MDLB. 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 MDLB 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_MDLB TYPE STANDARD TABLE OF MDLB,
      WA_MDLB TYPE MDLB,
      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: <MDLB> TYPE MDLB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDLB
*  INTO TABLE @DATA(IT_MDLB2).
*--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_MDLB INDEX 1 INTO DATA(WA_MDLB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MDLB ASSIGNING <MDLB>.
*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDLB>-EBELN = 1.
<MDLB>-EBELP = 1.
<MDLB>-EBELE = 1.
<MDLB>-BANFN = 1.
<MDLB>-BNFPO = 1.
ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDLB-PLNUM, sy-vline,
WA_MDLB-KNTTP, sy-vline,
WA_MDLB-SOBKZ, sy-vline,
WA_MDLB-KZVBR, sy-vline,
WA_MDLB-KZBWS, sy-vline,
WA_MDLB-BESKZ, sy-vline.
ENDLOOP. *Add any further fields from structure WA_MDLB 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_MDLB 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_MDLB INTO WA_MDLB. *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 EBELN CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_MDLB-EBELN IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_MDLB-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BANFN CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_MDLB-BANFN IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_MDLB-BANFN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNUM CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_MDLB-PLNUM IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_MDLB-PLNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_MDLB-KDAUF IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_MDLB-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPEL CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT' EXPORTING input = WA_MDLB-PSPEL IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_MDLB-PSPEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_MDLB-LIFNR IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_MDLB-LIFNR.
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_MDLB_STR,
EBELN TYPE STRING,
EBELP TYPE STRING,
EBELE TYPE STRING,
BANFN TYPE STRING,
BNFPO TYPE STRING,
PLNUM TYPE STRING,
KNTTP TYPE STRING,
SOBKZ TYPE STRING,
KZVBR TYPE STRING,
KZBWS TYPE STRING,
BESKZ TYPE STRING,
SOBES TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KDEIN TYPE STRING,
PSPEL TYPE STRING,
WAMNG TYPE STRING,
WAWRT TYPE STRING,
KZEAR TYPE STRING,
LIFNR TYPE STRING,
AUFPL_ORD TYPE STRING,
APLZL_ORD TYPE STRING,END OF T_EKKO_STR. DATA: WA_MDLB_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_MDLB_STR-EBELN sy-vline
WA_MDLB_STR-EBELP sy-vline
WA_MDLB_STR-EBELE sy-vline
WA_MDLB_STR-BANFN sy-vline
WA_MDLB_STR-BNFPO sy-vline
WA_MDLB_STR-PLNUM sy-vline
WA_MDLB_STR-KNTTP sy-vline
WA_MDLB_STR-SOBKZ sy-vline
WA_MDLB_STR-KZVBR sy-vline
WA_MDLB_STR-KZBWS sy-vline
WA_MDLB_STR-BESKZ sy-vline
WA_MDLB_STR-SOBES sy-vline
WA_MDLB_STR-KDAUF sy-vline
WA_MDLB_STR-KDPOS sy-vline
WA_MDLB_STR-KDEIN sy-vline
WA_MDLB_STR-PSPEL sy-vline
WA_MDLB_STR-WAMNG sy-vline
WA_MDLB_STR-WAWRT sy-vline
WA_MDLB_STR-KZEAR sy-vline
WA_MDLB_STR-LIFNR sy-vline
WA_MDLB_STR-AUFPL_ORD sy-vline
WA_MDLB_STR-APLZL_ORD sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.