ABAP Select data from SAP table MEPO1320_TECH into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MEPO1320_TECH 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 MEPO1320_TECH. 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 MEPO1320_TECH 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_MEPO1320_TECH TYPE STANDARD TABLE OF MEPO1320_TECH,
      WA_MEPO1320_TECH TYPE MEPO1320_TECH,
      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: <MEPO1320_TECH> TYPE MEPO1320_TECH.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MEPO1320_TECH.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MEPO1320_TECH
  INTO TABLE IT_MEPO1320_TECH.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MEPO1320_TECH
*  INTO TABLE @DATA(IT_MEPO1320_TECH2).
*--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_MEPO1320_TECH INDEX 1 INTO DATA(WA_MEPO1320_TECH2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MEPO1320_TECH ASSIGNING <MEPO1320_TECH>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MEPO1320_TECH>-TCSELFLAG = 1.
<MEPO1320_TECH>-STATUSICON = 1.
<MEPO1320_TECH>-SELFLAG = 1.
<MEPO1320_TECH>-CHANGED = 1.
<MEPO1320_TECH>-LOEKZ = 1.

ENDLOOP.

LOOP AT IT_MEPO1320_TECH INTO WA_MEPO1320_TECH.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MEPO1320_TECH-EBELN, sy-vline,
  WA_MEPO1320_TECH-EBELP, sy-vline,
  WA_MEPO1320_TECH-LPEIN, sy-vline,
  WA_MEPO1320_TECH-EINDT, sy-vline,
  WA_MEPO1320_TECH-MEINS, sy-vline,
  WA_MEPO1320_TECH-HANDLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MEPO1320_TECH 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_MEPO1320_TECH 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_MEPO1320_TECH INTO WA_MEPO1320_TECH.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEPO1320_TECH-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEPO1320_TECH-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MEPO1320_TECH-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEPO1320_TECH-MEINS.
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_MEPO1320_TECH_STR, 
TCSELFLAG TYPE STRING,
STATUSICON TYPE STRING,
SELFLAG TYPE STRING,
CHANGED TYPE STRING,
LOEKZ TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
LPEIN TYPE STRING,
EINDT TYPE STRING,
MEINS TYPE STRING,
HANDLE TYPE STRING,
REQ_CLOSED TYPE STRING,
SN_BUTTON_TOGG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MEPO1320_TECH_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_MEPO1320_TECH_STR-TCSELFLAG sy-vline 
WA_MEPO1320_TECH_STR-STATUSICON sy-vline 
WA_MEPO1320_TECH_STR-SELFLAG sy-vline 
WA_MEPO1320_TECH_STR-CHANGED sy-vline 
WA_MEPO1320_TECH_STR-LOEKZ sy-vline 
WA_MEPO1320_TECH_STR-EBELN sy-vline 
WA_MEPO1320_TECH_STR-EBELP sy-vline 
WA_MEPO1320_TECH_STR-LPEIN sy-vline 
WA_MEPO1320_TECH_STR-EINDT sy-vline 
WA_MEPO1320_TECH_STR-MEINS sy-vline 
WA_MEPO1320_TECH_STR-HANDLE sy-vline 
WA_MEPO1320_TECH_STR-REQ_CLOSED sy-vline 
WA_MEPO1320_TECH_STR-SN_BUTTON_TOGG sy-vline      INTO ld_text SEPARATED BY SPACE.

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