ABAP Select data from SAP table QAERR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QAERR
*  INTO TABLE @DATA(IT_QAERR2).
*--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_QAERR INDEX 1 INTO DATA(WA_QAERR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QAERR>-AKTION = 1.
<QAERR>-VORNR = 1.
<QAERR>-MERKNR = 1.
<QAERR>-KURZTEXT = 1.
<QAERR>-PROBENR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QAERR-KZUMFS, sy-vline,
  WA_QAERR-SOLLSTPUMF, sy-vline,
  WA_QAERR-SATZSTATUS, sy-vline,
  WA_QAERR-DUMMY1, sy-vline,
  WA_QAERR-DUMMY2, sy-vline,
  WA_QAERR-DUMMY3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QAERR 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_QAERR 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_QAERR INTO WA_QAERR.


*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 NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_QAERR-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QAERR-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PROBEMGEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_QAERR-PROBEMGEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QAERR-PROBEMGEH.
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_QAERR_STR, 
AKTION TYPE STRING,
VORNR TYPE STRING,
MERKNR TYPE STRING,
KURZTEXT TYPE STRING,
PROBENR TYPE STRING,
KZUMFS TYPE STRING,
SOLLSTPUMF TYPE STRING,
SATZSTATUS TYPE STRING,
DUMMY1 TYPE STRING,
DUMMY2 TYPE STRING,
DUMMY3 TYPE STRING,
MSGNR TYPE STRING,
TEXT TYPE STRING,
PROBMGFAK TYPE STRING,
PROBEMGEH TYPE STRING,
ANNAHMEZ TYPE STRING,
RUECKWEZ TYPE STRING,
KFAKTORNI TYPE STRING,
KFAKTOR TYPE STRING,
PRSTUFE TYPE STRING,
QDYNREGEL TYPE STRING,
FBNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QAERR_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_QAERR_STR-AKTION sy-vline 
WA_QAERR_STR-VORNR sy-vline 
WA_QAERR_STR-MERKNR sy-vline 
WA_QAERR_STR-KURZTEXT sy-vline 
WA_QAERR_STR-PROBENR sy-vline 
WA_QAERR_STR-KZUMFS sy-vline 
WA_QAERR_STR-SOLLSTPUMF sy-vline 
WA_QAERR_STR-SATZSTATUS sy-vline 
WA_QAERR_STR-DUMMY1 sy-vline 
WA_QAERR_STR-DUMMY2 sy-vline 
WA_QAERR_STR-DUMMY3 sy-vline 
WA_QAERR_STR-MSGNR sy-vline 
WA_QAERR_STR-TEXT sy-vline 
WA_QAERR_STR-PROBMGFAK sy-vline 
WA_QAERR_STR-PROBEMGEH sy-vline 
WA_QAERR_STR-ANNAHMEZ sy-vline 
WA_QAERR_STR-RUECKWEZ sy-vline 
WA_QAERR_STR-KFAKTORNI sy-vline 
WA_QAERR_STR-KFAKTOR sy-vline 
WA_QAERR_STR-PRSTUFE sy-vline 
WA_QAERR_STR-QDYNREGEL sy-vline 
WA_QAERR_STR-FBNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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