ABAP Select data from SAP table QINF_CHG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QINF_CHG
*  INTO TABLE @DATA(IT_QINF_CHG2).
*--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_QINF_CHG INDEX 1 INTO DATA(WA_QINF_CHG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QINF_CHG>-MATNR = 1.
<QINF_CHG>-ZAEHL = 1.
<QINF_CHG>-LIEFERANT = 1.
<QINF_CHG>-WERK = 1.
<QINF_CHG>-FREI_DAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QINF_CHG-FREI_MGKZ, sy-vline,
  WA_QINF_CHG-FREI_MNG, sy-vline,
  WA_QINF_CHG-SPERRGRUND, sy-vline,
  WA_QINF_CHG-SPERRFKT, sy-vline,
  WA_QINF_CHG-NOINSP, sy-vline,
  WA_QINF_CHG-QSSYSFAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QINF_CHG 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_QINF_CHG 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_QINF_CHG INTO WA_QINF_CHG.


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

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

*Conversion exit NUMCV, internal->external for field REVLV
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_QINF_CHG-REVLV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QINF_CHG-REVLV.
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_QINF_CHG_STR, 
MATNR TYPE STRING,
ZAEHL TYPE STRING,
LIEFERANT TYPE STRING,
WERK TYPE STRING,
FREI_DAT TYPE STRING,
FREI_MGKZ TYPE STRING,
FREI_MNG TYPE STRING,
SPERRGRUND TYPE STRING,
SPERRFKT TYPE STRING,
NOINSP TYPE STRING,
QSSYSFAM TYPE STRING,
QSSYSDAT TYPE STRING,
VARIABNAHM TYPE STRING,
PPAP_IS_REQUIRED TYPE STRING,
PPAP_LEVEL TYPE STRING,
PPAP_STATUS TYPE STRING,
PPAP_ID TYPE STRING,
STSMA TYPE STRING,
NOINSPABN TYPE STRING,
VORLABN TYPE STRING,
REVLV TYPE STRING,
CERTCONTROL TYPE STRING,
DUMMY_QINF_INCL_EEW_PS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QINF_CHG_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_QINF_CHG_STR-MATNR sy-vline 
WA_QINF_CHG_STR-ZAEHL sy-vline 
WA_QINF_CHG_STR-LIEFERANT sy-vline 
WA_QINF_CHG_STR-WERK sy-vline 
WA_QINF_CHG_STR-FREI_DAT sy-vline 
WA_QINF_CHG_STR-FREI_MGKZ sy-vline 
WA_QINF_CHG_STR-FREI_MNG sy-vline 
WA_QINF_CHG_STR-SPERRGRUND sy-vline 
WA_QINF_CHG_STR-SPERRFKT sy-vline 
WA_QINF_CHG_STR-NOINSP sy-vline 
WA_QINF_CHG_STR-QSSYSFAM sy-vline 
WA_QINF_CHG_STR-QSSYSDAT sy-vline 
WA_QINF_CHG_STR-VARIABNAHM sy-vline 
WA_QINF_CHG_STR-PPAP_IS_REQUIRED sy-vline 
WA_QINF_CHG_STR-PPAP_LEVEL sy-vline 
WA_QINF_CHG_STR-PPAP_STATUS sy-vline 
WA_QINF_CHG_STR-PPAP_ID sy-vline 
WA_QINF_CHG_STR-STSMA sy-vline 
WA_QINF_CHG_STR-NOINSPABN sy-vline 
WA_QINF_CHG_STR-VORLABN sy-vline 
WA_QINF_CHG_STR-REVLV sy-vline 
WA_QINF_CHG_STR-CERTCONTROL sy-vline 
WA_QINF_CHG_STR-DUMMY_QINF_INCL_EEW_PS sy-vline      INTO ld_text SEPARATED BY SPACE.

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