ABAP Select data from SAP table U_12300 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_12300 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 U_12300. 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 U_12300 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_U_12300 TYPE STANDARD TABLE OF U_12300,
      WA_U_12300 TYPE U_12300,
      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: <U_12300> TYPE U_12300.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_12300.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_12300
  INTO TABLE IT_U_12300.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_12300
*  INTO TABLE @DATA(IT_U_123002).
*--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_U_12300 INDEX 1 INTO DATA(WA_U_123002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_12300 ASSIGNING <U_12300>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_12300>-MANDT = 1.
<U_12300>-ANWND = 1.
<U_12300>-ABSND = 1.
<U_12300>-AZIDT = 1.
<U_12300>-EMKEY = 1.

ENDLOOP.

LOOP AT IT_U_12300 INTO WA_U_12300.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_12300-KUKEY, sy-vline,
  WA_U_12300-ASTAT, sy-vline,
  WA_U_12300-DSTAT, sy-vline,
  WA_U_12300-VB1OK, sy-vline,
  WA_U_12300-VB2OK, sy-vline,
  WA_U_12300-KIPRE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_12300 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_U_12300 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_U_12300 INTO WA_U_12300.


*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 HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_12300-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12300-HKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU172, internal->external for field SSBTR
CALL FUNCTION 'CONVERSION_EXIT_AU172_OUTPUT'
  EXPORTING
    input =                      WA_U_12300-SSBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12300-SSBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU172, internal->external for field SUMSO
CALL FUNCTION 'CONVERSION_EXIT_AU172_OUTPUT'
  EXPORTING
    input =                      WA_U_12300-SUMSO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12300-SUMSO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU172, internal->external for field SUMHA
CALL FUNCTION 'CONVERSION_EXIT_AU172_OUTPUT'
  EXPORTING
    input =                      WA_U_12300-SUMHA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12300-SUMHA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU172, internal->external for field ESBTR
CALL FUNCTION 'CONVERSION_EXIT_AU172_OUTPUT'
  EXPORTING
    input =                      WA_U_12300-ESBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12300-ESBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU172, internal->external for field ESDMB
CALL FUNCTION 'CONVERSION_EXIT_AU172_OUTPUT'
  EXPORTING
    input =                      WA_U_12300-ESDMB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12300-ESDMB.
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_U_12300_STR, 
MANDT TYPE STRING,
ANWND TYPE STRING,
ABSND TYPE STRING,
AZIDT TYPE STRING,
EMKEY TYPE STRING,
KUKEY TYPE STRING,
ASTAT TYPE STRING,
DSTAT TYPE STRING,
VB1OK TYPE STRING,
VB2OK TYPE STRING,
KIPRE TYPE STRING,
VFDAT TYPE STRING,
GRP01 TYPE STRING,
XKEP1 TYPE STRING,
GRP02 TYPE STRING,
XKEP2 TYPE STRING,
WVDAT TYPE STRING,
WVTIM TYPE STRING,
WVART TYPE STRING,
HKONT TYPE STRING,
KTONR TYPE STRING,
KTOIH TYPE STRING,
KTOSB TYPE STRING,
AZNUM TYPE STRING,
AZSNR TYPE STRING,
AZDAT TYPE STRING,
BUKRS TYPE STRING,
KTOPL TYPE STRING,
WAERS TYPE STRING,
SSTYP TYPE STRING,
SSVOZ TYPE STRING,
SSBTR TYPE STRING,
SUMSO TYPE STRING,
SUMHA TYPE STRING,
ESTYP TYPE STRING,
ESVOZ TYPE STRING,
ESBTR TYPE STRING,
ESDMB TYPE STRING,
BLAUF TYPE STRING,
ELAUF TYPE STRING,
HZINS TYPE STRING,
TEILN TYPE STRING,
BKTOA TYPE STRING,
ANZES TYPE STRING,
VGTYP TYPE STRING,
EFART TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
EUSER TYPE STRING,
EDATE TYPE STRING,
ETIME TYPE STRING,
BKREF TYPE STRING,
XFDIS TYPE STRING,
DSART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_12300_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_U_12300_STR-MANDT sy-vline 
WA_U_12300_STR-ANWND sy-vline 
WA_U_12300_STR-ABSND sy-vline 
WA_U_12300_STR-AZIDT sy-vline 
WA_U_12300_STR-EMKEY sy-vline 
WA_U_12300_STR-KUKEY sy-vline 
WA_U_12300_STR-ASTAT sy-vline 
WA_U_12300_STR-DSTAT sy-vline 
WA_U_12300_STR-VB1OK sy-vline 
WA_U_12300_STR-VB2OK sy-vline 
WA_U_12300_STR-KIPRE sy-vline 
WA_U_12300_STR-VFDAT sy-vline 
WA_U_12300_STR-GRP01 sy-vline 
WA_U_12300_STR-XKEP1 sy-vline 
WA_U_12300_STR-GRP02 sy-vline 
WA_U_12300_STR-XKEP2 sy-vline 
WA_U_12300_STR-WVDAT sy-vline 
WA_U_12300_STR-WVTIM sy-vline 
WA_U_12300_STR-WVART sy-vline 
WA_U_12300_STR-HKONT sy-vline 
WA_U_12300_STR-KTONR sy-vline 
WA_U_12300_STR-KTOIH sy-vline 
WA_U_12300_STR-KTOSB sy-vline 
WA_U_12300_STR-AZNUM sy-vline 
WA_U_12300_STR-AZSNR sy-vline 
WA_U_12300_STR-AZDAT sy-vline 
WA_U_12300_STR-BUKRS sy-vline 
WA_U_12300_STR-KTOPL sy-vline 
WA_U_12300_STR-WAERS sy-vline 
WA_U_12300_STR-SSTYP sy-vline 
WA_U_12300_STR-SSVOZ sy-vline 
WA_U_12300_STR-SSBTR sy-vline 
WA_U_12300_STR-SUMSO sy-vline 
WA_U_12300_STR-SUMHA sy-vline 
WA_U_12300_STR-ESTYP sy-vline 
WA_U_12300_STR-ESVOZ sy-vline 
WA_U_12300_STR-ESBTR sy-vline 
WA_U_12300_STR-ESDMB sy-vline 
WA_U_12300_STR-BLAUF sy-vline 
WA_U_12300_STR-ELAUF sy-vline 
WA_U_12300_STR-HZINS sy-vline 
WA_U_12300_STR-TEILN sy-vline 
WA_U_12300_STR-BKTOA sy-vline 
WA_U_12300_STR-ANZES sy-vline 
WA_U_12300_STR-VGTYP sy-vline 
WA_U_12300_STR-EFART sy-vline 
WA_U_12300_STR-HBKID sy-vline 
WA_U_12300_STR-HKTID sy-vline 
WA_U_12300_STR-EUSER sy-vline 
WA_U_12300_STR-EDATE sy-vline 
WA_U_12300_STR-ETIME sy-vline 
WA_U_12300_STR-BKREF sy-vline 
WA_U_12300_STR-XFDIS sy-vline 
WA_U_12300_STR-DSART sy-vline      INTO ld_text SEPARATED BY SPACE.

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