ABAP Select data from SAP table MERE_OUTTAB_MEKA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MERE_OUTTAB_MEKA
*  INTO TABLE @DATA(IT_MERE_OUTTAB_MEKA2).
*--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_MERE_OUTTAB_MEKA INDEX 1 INTO DATA(WA_MERE_OUTTAB_MEKA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MERE_OUTTAB_MEKA>-LIFNR = 1.
<MERE_OUTTAB_MEKA>-MATNR = 1.
<MERE_OUTTAB_MEKA>-MATKL = 1.
<MERE_OUTTAB_MEKA>-INFNR = 1.
<MERE_OUTTAB_MEKA>-EKORG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MERE_OUTTAB_MEKA-ESOKZ, sy-vline,
  WA_MERE_OUTTAB_MEKA-PTEXT, sy-vline,
  WA_MERE_OUTTAB_MEKA-WERKS, sy-vline,
  WA_MERE_OUTTAB_MEKA-EVRTN, sy-vline,
  WA_MERE_OUTTAB_MEKA-EVRTP, sy-vline,
  WA_MERE_OUTTAB_MEKA-EKKOL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MERE_OUTTAB_MEKA 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_MERE_OUTTAB_MEKA 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_MERE_OUTTAB_MEKA INTO WA_MERE_OUTTAB_MEKA.


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

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

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

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

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

*Conversion exit CUNIT, internal->external for field BSTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MERE_OUTTAB_MEKA-BSTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MERE_OUTTAB_MEKA-BSTME.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit KOTAB, internal->external for field KOTABNR
CALL FUNCTION 'CONVERSION_EXIT_KOTAB_OUTPUT'
  EXPORTING
    input =                      WA_MERE_OUTTAB_MEKA-KOTABNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MERE_OUTTAB_MEKA-KOTABNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field KMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MERE_OUTTAB_MEKA-KMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MERE_OUTTAB_MEKA-KMEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field KONMS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MERE_OUTTAB_MEKA-KONMS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MERE_OUTTAB_MEKA-KONMS.
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_MERE_OUTTAB_MEKA_STR, 
LIFNR TYPE STRING,
MATNR TYPE STRING,
MATKL TYPE STRING,
INFNR TYPE STRING,
EKORG TYPE STRING,
ESOKZ TYPE STRING,
PTEXT TYPE STRING,
WERKS TYPE STRING,
EVRTN TYPE STRING,
EVRTP TYPE STRING,
EKKOL TYPE STRING,
EKKOA TYPE STRING,
MTART TYPE STRING,
LIFRE TYPE STRING,
BSTME TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
RESWK TYPE STRING,
LTSNR TYPE STRING,
KOLIF TYPE STRING,
VARCOND TYPE STRING,
KSCHL TYPE STRING,
KTEXT TYPE STRING,
KOTABNR TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
KBETR TYPE STRING,
KONWA TYPE STRING,
KPEIN TYPE STRING,
KMEIN TYPE STRING,
STFTXT TYPE STRING,
KSTBW TYPE STRING,
KONWS TYPE STRING,
KSTBM TYPE STRING,
KONMS TYPE STRING,
STFKZ TYPE STRING,
KPOSN TYPE STRING,
KLFN1 TYPE STRING,
KNUMH TYPE STRING,
KOPOS TYPE STRING,
AZPOS TYPE STRING,
FLAG8 TYPE STRING,
ZTEXT TYPE STRING,
XTEXT TYPE STRING,
STSKNZ TYPE STRING,
STSTXT TYPE STRING,
ZUSTAND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MERE_OUTTAB_MEKA_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_MERE_OUTTAB_MEKA_STR-LIFNR sy-vline 
WA_MERE_OUTTAB_MEKA_STR-MATNR sy-vline 
WA_MERE_OUTTAB_MEKA_STR-MATKL sy-vline 
WA_MERE_OUTTAB_MEKA_STR-INFNR sy-vline 
WA_MERE_OUTTAB_MEKA_STR-EKORG sy-vline 
WA_MERE_OUTTAB_MEKA_STR-ESOKZ sy-vline 
WA_MERE_OUTTAB_MEKA_STR-PTEXT sy-vline 
WA_MERE_OUTTAB_MEKA_STR-WERKS sy-vline 
WA_MERE_OUTTAB_MEKA_STR-EVRTN sy-vline 
WA_MERE_OUTTAB_MEKA_STR-EVRTP sy-vline 
WA_MERE_OUTTAB_MEKA_STR-EKKOL sy-vline 
WA_MERE_OUTTAB_MEKA_STR-EKKOA sy-vline 
WA_MERE_OUTTAB_MEKA_STR-MTART sy-vline 
WA_MERE_OUTTAB_MEKA_STR-LIFRE sy-vline 
WA_MERE_OUTTAB_MEKA_STR-BSTME sy-vline 
WA_MERE_OUTTAB_MEKA_STR-INCO1 sy-vline 
WA_MERE_OUTTAB_MEKA_STR-INCO2 sy-vline 
WA_MERE_OUTTAB_MEKA_STR-RESWK sy-vline 
WA_MERE_OUTTAB_MEKA_STR-LTSNR sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KOLIF sy-vline 
WA_MERE_OUTTAB_MEKA_STR-VARCOND sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KSCHL sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KTEXT sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KOTABNR sy-vline 
WA_MERE_OUTTAB_MEKA_STR-DATAB sy-vline 
WA_MERE_OUTTAB_MEKA_STR-DATBI sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KBETR sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KONWA sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KPEIN sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KMEIN sy-vline 
WA_MERE_OUTTAB_MEKA_STR-STFTXT sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KSTBW sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KONWS sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KSTBM sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KONMS sy-vline 
WA_MERE_OUTTAB_MEKA_STR-STFKZ sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KPOSN sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KLFN1 sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KNUMH sy-vline 
WA_MERE_OUTTAB_MEKA_STR-KOPOS sy-vline 
WA_MERE_OUTTAB_MEKA_STR-AZPOS sy-vline 
WA_MERE_OUTTAB_MEKA_STR-FLAG8 sy-vline 
WA_MERE_OUTTAB_MEKA_STR-ZTEXT sy-vline 
WA_MERE_OUTTAB_MEKA_STR-XTEXT sy-vline 
WA_MERE_OUTTAB_MEKA_STR-STSKNZ sy-vline 
WA_MERE_OUTTAB_MEKA_STR-STSTXT sy-vline 
WA_MERE_OUTTAB_MEKA_STR-ZUSTAND sy-vline      INTO ld_text SEPARATED BY SPACE.

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