ABAP Select data from SAP table MYLAUFIT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MYLAUFIT
*  INTO TABLE @DATA(IT_MYLAUFIT2).
*--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_MYLAUFIT INDEX 1 INTO DATA(WA_MYLAUFIT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MYLAUFIT>-MANDT = 1.
<MYLAUFIT>-LAUFKEY = 1.
<MYLAUFIT>-BELNR = 1.
<MYLAUFIT>-GSBER = 1.
<MYLAUFIT>-SEGMT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MYLAUFIT-PRCTR, sy-vline,
  WA_MYLAUFIT-MATNR, sy-vline,
  WA_MYLAUFIT-BWTAR, sy-vline,
  WA_MYLAUFIT-BWKEY, sy-vline,
  WA_MYLAUFIT-BKLAS, sy-vline,
  WA_MYLAUFIT-VALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MYLAUFIT 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_MYLAUFIT 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_MYLAUFIT INTO WA_MYLAUFIT.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field STBLG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MYLAUFIT-STBLG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYLAUFIT-STBLG.
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_MYLAUFIT_STR, 
MANDT TYPE STRING,
LAUFKEY TYPE STRING,
BELNR TYPE STRING,
GSBER TYPE STRING,
SEGMT TYPE STRING,
PRCTR TYPE STRING,
MATNR TYPE STRING,
BWTAR TYPE STRING,
BWKEY TYPE STRING,
BKLAS TYPE STRING,
VALUE TYPE STRING,
KONTO TYPE STRING,
OFFSET_ACC_H TYPE STRING,
STFLG TYPE STRING,
STBLG TYPE STRING,
STDATUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MYLAUFIT_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_MYLAUFIT_STR-MANDT sy-vline 
WA_MYLAUFIT_STR-LAUFKEY sy-vline 
WA_MYLAUFIT_STR-BELNR sy-vline 
WA_MYLAUFIT_STR-GSBER sy-vline 
WA_MYLAUFIT_STR-SEGMT sy-vline 
WA_MYLAUFIT_STR-PRCTR sy-vline 
WA_MYLAUFIT_STR-MATNR sy-vline 
WA_MYLAUFIT_STR-BWTAR sy-vline 
WA_MYLAUFIT_STR-BWKEY sy-vline 
WA_MYLAUFIT_STR-BKLAS sy-vline 
WA_MYLAUFIT_STR-VALUE sy-vline 
WA_MYLAUFIT_STR-KONTO sy-vline 
WA_MYLAUFIT_STR-OFFSET_ACC_H sy-vline 
WA_MYLAUFIT_STR-STFLG sy-vline 
WA_MYLAUFIT_STR-STBLG sy-vline 
WA_MYLAUFIT_STR-STDATUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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