ABAP Select data from SAP table CDRED_OUTTAB_MEQ4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CDRED_OUTTAB_MEQ4 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 CDRED_OUTTAB_MEQ4. 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 CDRED_OUTTAB_MEQ4 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_CDRED_OUTTAB_MEQ4 TYPE STANDARD TABLE OF CDRED_OUTTAB_MEQ4,
      WA_CDRED_OUTTAB_MEQ4 TYPE CDRED_OUTTAB_MEQ4,
      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: <CDRED_OUTTAB_MEQ4> TYPE CDRED_OUTTAB_MEQ4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CDRED_OUTTAB_MEQ4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CDRED_OUTTAB_MEQ4
  INTO TABLE IT_CDRED_OUTTAB_MEQ4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDRED_OUTTAB_MEQ4
*  INTO TABLE @DATA(IT_CDRED_OUTTAB_MEQ42).
*--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_CDRED_OUTTAB_MEQ4 INDEX 1 INTO DATA(WA_CDRED_OUTTAB_MEQ42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CDRED_OUTTAB_MEQ4 ASSIGNING <CDRED_OUTTAB_MEQ4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDRED_OUTTAB_MEQ4>-MATNR = 1.
<CDRED_OUTTAB_MEQ4>-WERKS = 1.
<CDRED_OUTTAB_MEQ4>-USERNAME = 1.
<CDRED_OUTTAB_MEQ4>-UDATE = 1.
<CDRED_OUTTAB_MEQ4>-UTIME = 1.

ENDLOOP.

LOOP AT IT_CDRED_OUTTAB_MEQ4 INTO WA_CDRED_OUTTAB_MEQ4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDRED_OUTTAB_MEQ4-TCODE, sy-vline,
  WA_CDRED_OUTTAB_MEQ4-CHANGENR, sy-vline,
  WA_CDRED_OUTTAB_MEQ4-QUNUM, sy-vline,
  WA_CDRED_OUTTAB_MEQ4-VDATU, sy-vline,
  WA_CDRED_OUTTAB_MEQ4-BDATU, sy-vline,
  WA_CDRED_OUTTAB_MEQ4-QUPOS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CDRED_OUTTAB_MEQ4 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_CDRED_OUTTAB_MEQ4 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_CDRED_OUTTAB_MEQ4 INTO WA_CDRED_OUTTAB_MEQ4.


*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_CDRED_OUTTAB_MEQ4-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDRED_OUTTAB_MEQ4-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CHANGENR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CDRED_OUTTAB_MEQ4-CHANGENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDRED_OUTTAB_MEQ4-CHANGENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field QUNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CDRED_OUTTAB_MEQ4-QUNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDRED_OUTTAB_MEQ4-QUNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRACHE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CDRED_OUTTAB_MEQ4-SPRACHE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDRED_OUTTAB_MEQ4-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_CDRED_OUTTAB_MEQ4_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
USERNAME TYPE STRING,
UDATE TYPE STRING,
UTIME TYPE STRING,
TCODE TYPE STRING,
CHANGENR TYPE STRING,
QUNUM TYPE STRING,
VDATU TYPE STRING,
BDATU TYPE STRING,
QUPOS TYPE STRING,
CHNGIND TYPE STRING,
INDTEXT TYPE STRING,
FNAME TYPE STRING,
FTEXT TYPE STRING,
F_OLD TYPE STRING,
F_NEW TYPE STRING,
TEXTART TYPE STRING,
SPRACHE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDRED_OUTTAB_MEQ4_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_CDRED_OUTTAB_MEQ4_STR-MATNR sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-WERKS sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-USERNAME sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-UDATE sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-UTIME sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-TCODE sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-CHANGENR sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-QUNUM sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-VDATU sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-BDATU sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-QUPOS sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-CHNGIND sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-INDTEXT sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-FNAME sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-FTEXT sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-F_OLD sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-F_NEW sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-TEXTART sy-vline 
WA_CDRED_OUTTAB_MEQ4_STR-SPRACHE sy-vline      INTO ld_text SEPARATED BY SPACE.

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