ABAP Select data from SAP table BWE_QMEL_2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BWE_QMEL_2 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 BWE_QMEL_2. 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 BWE_QMEL_2 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_BWE_QMEL_2 TYPE STANDARD TABLE OF BWE_QMEL_2,
      WA_BWE_QMEL_2 TYPE BWE_QMEL_2,
      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: <BWE_QMEL_2> TYPE BWE_QMEL_2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BWE_QMEL_2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BWE_QMEL_2
  INTO TABLE IT_BWE_QMEL_2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BWE_QMEL_2
*  INTO TABLE @DATA(IT_BWE_QMEL_22).
*--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_BWE_QMEL_2 INDEX 1 INTO DATA(WA_BWE_QMEL_22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BWE_QMEL_2 ASSIGNING <BWE_QMEL_2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BWE_QMEL_2>-QMNUM = 1.
<BWE_QMEL_2>-ERDAT = 1.
<BWE_QMEL_2>-AEDAT = 1.
<BWE_QMEL_2>-QMDAT = 1.
<BWE_QMEL_2>-HERKZ = 1.

ENDLOOP.

LOOP AT IT_BWE_QMEL_2 INTO WA_BWE_QMEL_2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BWE_QMEL_2-QMART, sy-vline,
  WA_BWE_QMEL_2-QMKAT, sy-vline,
  WA_BWE_QMEL_2-QMGRP, sy-vline,
  WA_BWE_QMEL_2-QMCOD, sy-vline,
  WA_BWE_QMEL_2-PRIOK, sy-vline,
  WA_BWE_QMEL_2-MAWERK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BWE_QMEL_2 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_BWE_QMEL_2 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_BWE_QMEL_2 INTO WA_BWE_QMEL_2.


*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 QMNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_QMEL_2-QMNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_QMEL_2-QMNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_BWE_QMEL_2-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_QMEL_2-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_QMEL_2-LIFNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_QMEL_2-LIFNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_QMEL_2-KUNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_QMEL_2-KUNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_QMEL_2-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_QMEL_2-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_BWE_QMEL_2-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_QMEL_2-TPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_QMEL_2-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_QMEL_2-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field BAUTL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_BWE_QMEL_2-BAUTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_QMEL_2-BAUTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRUEFLOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_QMEL_2-PRUEFLOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_QMEL_2-PRUEFLOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COAUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_QMEL_2-COAUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_QMEL_2-COAUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_QMEL_2-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_QMEL_2-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WARPL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_QMEL_2-WARPL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_QMEL_2-WARPL.
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_BWE_QMEL_2_STR, 
QMNUM TYPE STRING,
ERDAT TYPE STRING,
AEDAT TYPE STRING,
QMDAT TYPE STRING,
HERKZ TYPE STRING,
QMART TYPE STRING,
QMKAT TYPE STRING,
QMGRP TYPE STRING,
QMCOD TYPE STRING,
PRIOK TYPE STRING,
MAWERK TYPE STRING,
MATNR TYPE STRING,
CHARG TYPE STRING,
EKORG TYPE STRING,
LIFNUM TYPE STRING,
KUNUM TYPE STRING,
KDAUF TYPE STRING,
TPLNR TYPE STRING,
EQUNR TYPE STRING,
BAUTL TYPE STRING,
IWERK TYPE STRING,
INGRP TYPE STRING,
MSAUS TYPE STRING,
SWERK TYPE STRING,
STORT TYPE STRING,
BEBER TYPE STRING,
MSGRP TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
PRUEFLOS TYPE STRING,
COAUFNR TYPE STRING,
AUFNR TYPE STRING,
OBJNR TYPE STRING,
BWSTNTF1 TYPE STRING,
BWSTNTF2 TYPE STRING,
BWSTNTF3 TYPE STRING,
STADT TYPE STRING,
LRMDT TYPE STRING,
NPLDA TYPE STRING,
WARPL TYPE STRING,
STRAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BWE_QMEL_2_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_BWE_QMEL_2_STR-QMNUM sy-vline 
WA_BWE_QMEL_2_STR-ERDAT sy-vline 
WA_BWE_QMEL_2_STR-AEDAT sy-vline 
WA_BWE_QMEL_2_STR-QMDAT sy-vline 
WA_BWE_QMEL_2_STR-HERKZ sy-vline 
WA_BWE_QMEL_2_STR-QMART sy-vline 
WA_BWE_QMEL_2_STR-QMKAT sy-vline 
WA_BWE_QMEL_2_STR-QMGRP sy-vline 
WA_BWE_QMEL_2_STR-QMCOD sy-vline 
WA_BWE_QMEL_2_STR-PRIOK sy-vline 
WA_BWE_QMEL_2_STR-MAWERK sy-vline 
WA_BWE_QMEL_2_STR-MATNR sy-vline 
WA_BWE_QMEL_2_STR-CHARG sy-vline 
WA_BWE_QMEL_2_STR-EKORG sy-vline 
WA_BWE_QMEL_2_STR-LIFNUM sy-vline 
WA_BWE_QMEL_2_STR-KUNUM sy-vline 
WA_BWE_QMEL_2_STR-KDAUF sy-vline 
WA_BWE_QMEL_2_STR-TPLNR sy-vline 
WA_BWE_QMEL_2_STR-EQUNR sy-vline 
WA_BWE_QMEL_2_STR-BAUTL sy-vline 
WA_BWE_QMEL_2_STR-IWERK sy-vline 
WA_BWE_QMEL_2_STR-INGRP sy-vline 
WA_BWE_QMEL_2_STR-MSAUS sy-vline 
WA_BWE_QMEL_2_STR-SWERK sy-vline 
WA_BWE_QMEL_2_STR-STORT sy-vline 
WA_BWE_QMEL_2_STR-BEBER sy-vline 
WA_BWE_QMEL_2_STR-MSGRP sy-vline 
WA_BWE_QMEL_2_STR-VKORG sy-vline 
WA_BWE_QMEL_2_STR-VTWEG sy-vline 
WA_BWE_QMEL_2_STR-SPART sy-vline 
WA_BWE_QMEL_2_STR-PRUEFLOS sy-vline 
WA_BWE_QMEL_2_STR-COAUFNR sy-vline 
WA_BWE_QMEL_2_STR-AUFNR sy-vline 
WA_BWE_QMEL_2_STR-OBJNR sy-vline 
WA_BWE_QMEL_2_STR-BWSTNTF1 sy-vline 
WA_BWE_QMEL_2_STR-BWSTNTF2 sy-vline 
WA_BWE_QMEL_2_STR-BWSTNTF3 sy-vline 
WA_BWE_QMEL_2_STR-STADT sy-vline 
WA_BWE_QMEL_2_STR-LRMDT sy-vline 
WA_BWE_QMEL_2_STR-NPLDA sy-vline 
WA_BWE_QMEL_2_STR-WARPL sy-vline 
WA_BWE_QMEL_2_STR-STRAT sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.