ABAP Select data from SAP table QMCOA_01C1_01_A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP QMCOA_01C1_01_A 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 QMCOA_01C1_01_A. 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 QMCOA_01C1_01_A 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_QMCOA_01C1_01_A TYPE STANDARD TABLE OF QMCOA_01C1_01_A,
      WA_QMCOA_01C1_01_A TYPE QMCOA_01C1_01_A,
      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: <QMCOA_01C1_01_A> TYPE QMCOA_01C1_01_A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_QMCOA_01C1_01_A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM QMCOA_01C1_01_A
  INTO TABLE IT_QMCOA_01C1_01_A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QMCOA_01C1_01_A
*  INTO TABLE @DATA(IT_QMCOA_01C1_01_A2).
*--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_QMCOA_01C1_01_A INDEX 1 INTO DATA(WA_QMCOA_01C1_01_A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_QMCOA_01C1_01_A ASSIGNING <QMCOA_01C1_01_A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QMCOA_01C1_01_A>-MANDT = 1.
<QMCOA_01C1_01_A>-ZGTYP = 1.
<QMCOA_01C1_01_A>-WEPRF = 1.
<QMCOA_01C1_01_A>-ZGLIEF = 1.
<QMCOA_01C1_01_A>-MSGART = 1.

ENDLOOP.

LOOP AT IT_QMCOA_01C1_01_A INTO WA_QMCOA_01C1_01_A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QMCOA_01C1_01_A-QCPRACT, sy-vline,
  WA_QMCOA_01C1_01_A-QGRPOP, sy-vline,
  WA_QMCOA_01C1_01_A-QREMIND, sy-vline,
  WA_QMCOA_01C1_01_A-QESCAL, sy-vline,
  WA_QMCOA_01C1_01_A-SPRACHE, sy-vline,
  WA_QMCOA_01C1_01_A-KURZTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QMCOA_01C1_01_A 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_QMCOA_01C1_01_A 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_QMCOA_01C1_01_A INTO WA_QMCOA_01C1_01_A.


*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 ISOLA, internal->external for field SPRACHE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_QMCOA_01C1_01_A-SPRACHE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QMCOA_01C1_01_A-SPRACHE.
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_QMCOA_01C1_01_A_STR, 
MANDT TYPE STRING,
ZGTYP TYPE STRING,
WEPRF TYPE STRING,
ZGLIEF TYPE STRING,
MSGART TYPE STRING,
QCPRACT TYPE STRING,
QGRPOP TYPE STRING,
QREMIND TYPE STRING,
QESCAL TYPE STRING,
SPRACHE TYPE STRING,
KURZTEXT TYPE STRING,
ZGPRUEF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QMCOA_01C1_01_A_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_QMCOA_01C1_01_A_STR-MANDT sy-vline 
WA_QMCOA_01C1_01_A_STR-ZGTYP sy-vline 
WA_QMCOA_01C1_01_A_STR-WEPRF sy-vline 
WA_QMCOA_01C1_01_A_STR-ZGLIEF sy-vline 
WA_QMCOA_01C1_01_A_STR-MSGART sy-vline 
WA_QMCOA_01C1_01_A_STR-QCPRACT sy-vline 
WA_QMCOA_01C1_01_A_STR-QGRPOP sy-vline 
WA_QMCOA_01C1_01_A_STR-QREMIND sy-vline 
WA_QMCOA_01C1_01_A_STR-QESCAL sy-vline 
WA_QMCOA_01C1_01_A_STR-SPRACHE sy-vline 
WA_QMCOA_01C1_01_A_STR-KURZTEXT sy-vline 
WA_QMCOA_01C1_01_A_STR-ZGPRUEF sy-vline      INTO ld_text SEPARATED BY SPACE.

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