ABAP Select data from SAP table HUWM_INITIAL_LOAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HUWM_INITIAL_LOAD
*  INTO TABLE @DATA(IT_HUWM_INITIAL_LOAD2).
*--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_HUWM_INITIAL_LOAD INDEX 1 INTO DATA(WA_HUWM_INITIAL_LOAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HUWM_INITIAL_LOAD>-MANDT = 1.
<HUWM_INITIAL_LOAD>-TOP_IDENT = 1.
<HUWM_INITIAL_LOAD>-LINE = 1.
<HUWM_INITIAL_LOAD>-EXIDV = 1.
<HUWM_INITIAL_LOAD>-ITEM_TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HUWM_INITIAL_LOAD-EXIDA, sy-vline,
  WA_HUWM_INITIAL_LOAD-VHILM, sy-vline,
  WA_HUWM_INITIAL_LOAD-EXIDV2, sy-vline,
  WA_HUWM_INITIAL_LOAD-BWLVS, sy-vline,
  WA_HUWM_INITIAL_LOAD-SQUIT, sy-vline,
  WA_HUWM_INITIAL_LOAD-LGNUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HUWM_INITIAL_LOAD 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_HUWM_INITIAL_LOAD 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_HUWM_INITIAL_LOAD INTO WA_HUWM_INITIAL_LOAD.


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

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

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

*Conversion exit ALPHA, internal->external for field EXIDV2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_HUWM_INITIAL_LOAD-EXIDV2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HUWM_INITIAL_LOAD-EXIDV2.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit VHUPI, internal->external for field PACKVORSCH
CALL FUNCTION 'CONVERSION_EXIT_VHUPI_OUTPUT'
  EXPORTING
    input =                      WA_HUWM_INITIAL_LOAD-PACKVORSCH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HUWM_INITIAL_LOAD-PACKVORSCH.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit GERNR, internal->external for field SERNR
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_HUWM_INITIAL_LOAD-SERNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HUWM_INITIAL_LOAD-SERNR.
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_HUWM_INITIAL_LOAD_STR, 
MANDT TYPE STRING,
TOP_IDENT TYPE STRING,
LINE TYPE STRING,
EXIDV TYPE STRING,
ITEM_TYPE TYPE STRING,
EXIDA TYPE STRING,
VHILM TYPE STRING,
EXIDV2 TYPE STRING,
BWLVS TYPE STRING,
SQUIT TYPE STRING,
LGNUM TYPE STRING,
TARAG TYPE STRING,
GEWEI TYPE STRING,
MAGEW TYPE STRING,
NTGEW TYPE STRING,
BRGEW TYPE STRING,
GEWEI_MAX TYPE STRING,
GEWTO TYPE STRING,
TAVOL TYPE STRING,
VOLEH TYPE STRING,
MAVOL TYPE STRING,
NTVOL TYPE STRING,
BTVOL TYPE STRING,
VOLEH_MAX TYPE STRING,
GEWFX TYPE STRING,
LAENG TYPE STRING,
BREIT TYPE STRING,
HOEHE TYPE STRING,
MEABM TYPE STRING,
LETYP TYPE STRING,
NLTYP TYPE STRING,
NLBER TYPE STRING,
NLPLA TYPE STRING,
INHALT TYPE STRING,
ERLKZ TYPE STRING,
SORTL TYPE STRING,
VEGR1 TYPE STRING,
VEGR2 TYPE STRING,
VEGR3 TYPE STRING,
VEGR4 TYPE STRING,
VEGR5 TYPE STRING,
PACKVORSCH TYPE STRING,
PACKVORSCHR_ST TYPE STRING,
LABELTYP TYPE STRING,
ZUL_AUFL TYPE STRING,
SUB_HU_EXIDV TYPE STRING,
QUANTITY TYPE STRING,
ALTME TYPE STRING,
MATNR TYPE STRING,
CHARG TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
WDATU TYPE STRING,
VFDAT TYPE STRING,
ZEUGN TYPE STRING,
KZBEI TYPE STRING,
ANZSN TYPE STRING,
BWART TYPE STRING,
ITEM_ZEILE TYPE STRING,
HSDAT TYPE STRING,
/CWM/QUANTITY TYPE STRING,
/CWM/ALTME TYPE STRING,
ZEILE TYPE STRING,
SERNR TYPE STRING,
UII TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HUWM_INITIAL_LOAD_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_HUWM_INITIAL_LOAD_STR-MANDT sy-vline 
WA_HUWM_INITIAL_LOAD_STR-TOP_IDENT sy-vline 
WA_HUWM_INITIAL_LOAD_STR-LINE sy-vline 
WA_HUWM_INITIAL_LOAD_STR-EXIDV sy-vline 
WA_HUWM_INITIAL_LOAD_STR-ITEM_TYPE sy-vline 
WA_HUWM_INITIAL_LOAD_STR-EXIDA sy-vline 
WA_HUWM_INITIAL_LOAD_STR-VHILM sy-vline 
WA_HUWM_INITIAL_LOAD_STR-EXIDV2 sy-vline 
WA_HUWM_INITIAL_LOAD_STR-BWLVS sy-vline 
WA_HUWM_INITIAL_LOAD_STR-SQUIT sy-vline 
WA_HUWM_INITIAL_LOAD_STR-LGNUM sy-vline 
WA_HUWM_INITIAL_LOAD_STR-TARAG sy-vline 
WA_HUWM_INITIAL_LOAD_STR-GEWEI sy-vline 
WA_HUWM_INITIAL_LOAD_STR-MAGEW sy-vline 
WA_HUWM_INITIAL_LOAD_STR-NTGEW sy-vline 
WA_HUWM_INITIAL_LOAD_STR-BRGEW sy-vline 
WA_HUWM_INITIAL_LOAD_STR-GEWEI_MAX sy-vline 
WA_HUWM_INITIAL_LOAD_STR-GEWTO sy-vline 
WA_HUWM_INITIAL_LOAD_STR-TAVOL sy-vline 
WA_HUWM_INITIAL_LOAD_STR-VOLEH sy-vline 
WA_HUWM_INITIAL_LOAD_STR-MAVOL sy-vline 
WA_HUWM_INITIAL_LOAD_STR-NTVOL sy-vline 
WA_HUWM_INITIAL_LOAD_STR-BTVOL sy-vline 
WA_HUWM_INITIAL_LOAD_STR-VOLEH_MAX sy-vline 
WA_HUWM_INITIAL_LOAD_STR-GEWFX sy-vline 
WA_HUWM_INITIAL_LOAD_STR-LAENG sy-vline 
WA_HUWM_INITIAL_LOAD_STR-BREIT sy-vline 
WA_HUWM_INITIAL_LOAD_STR-HOEHE sy-vline 
WA_HUWM_INITIAL_LOAD_STR-MEABM sy-vline 
WA_HUWM_INITIAL_LOAD_STR-LETYP sy-vline 
WA_HUWM_INITIAL_LOAD_STR-NLTYP sy-vline 
WA_HUWM_INITIAL_LOAD_STR-NLBER sy-vline 
WA_HUWM_INITIAL_LOAD_STR-NLPLA sy-vline 
WA_HUWM_INITIAL_LOAD_STR-INHALT sy-vline 
WA_HUWM_INITIAL_LOAD_STR-ERLKZ sy-vline 
WA_HUWM_INITIAL_LOAD_STR-SORTL sy-vline 
WA_HUWM_INITIAL_LOAD_STR-VEGR1 sy-vline 
WA_HUWM_INITIAL_LOAD_STR-VEGR2 sy-vline 
WA_HUWM_INITIAL_LOAD_STR-VEGR3 sy-vline 
WA_HUWM_INITIAL_LOAD_STR-VEGR4 sy-vline 
WA_HUWM_INITIAL_LOAD_STR-VEGR5 sy-vline 
WA_HUWM_INITIAL_LOAD_STR-PACKVORSCH sy-vline 
WA_HUWM_INITIAL_LOAD_STR-PACKVORSCHR_ST sy-vline 
WA_HUWM_INITIAL_LOAD_STR-LABELTYP sy-vline 
WA_HUWM_INITIAL_LOAD_STR-ZUL_AUFL sy-vline 
WA_HUWM_INITIAL_LOAD_STR-SUB_HU_EXIDV sy-vline 
WA_HUWM_INITIAL_LOAD_STR-QUANTITY sy-vline 
WA_HUWM_INITIAL_LOAD_STR-ALTME sy-vline 
WA_HUWM_INITIAL_LOAD_STR-MATNR sy-vline 
WA_HUWM_INITIAL_LOAD_STR-CHARG sy-vline 
WA_HUWM_INITIAL_LOAD_STR-WERKS sy-vline 
WA_HUWM_INITIAL_LOAD_STR-LGORT sy-vline 
WA_HUWM_INITIAL_LOAD_STR-BESTQ sy-vline 
WA_HUWM_INITIAL_LOAD_STR-SOBKZ sy-vline 
WA_HUWM_INITIAL_LOAD_STR-SONUM sy-vline 
WA_HUWM_INITIAL_LOAD_STR-WDATU sy-vline 
WA_HUWM_INITIAL_LOAD_STR-VFDAT sy-vline 
WA_HUWM_INITIAL_LOAD_STR-ZEUGN sy-vline 
WA_HUWM_INITIAL_LOAD_STR-KZBEI sy-vline 
WA_HUWM_INITIAL_LOAD_STR-ANZSN sy-vline 
WA_HUWM_INITIAL_LOAD_STR-BWART sy-vline 
WA_HUWM_INITIAL_LOAD_STR-ITEM_ZEILE sy-vline 
WA_HUWM_INITIAL_LOAD_STR-HSDAT sy-vline 
WA_HUWM_INITIAL_LOAD_STR-/CWM/QUANTITY sy-vline 
WA_HUWM_INITIAL_LOAD_STR-/CWM/ALTME sy-vline 
WA_HUWM_INITIAL_LOAD_STR-ZEILE sy-vline 
WA_HUWM_INITIAL_LOAD_STR-SERNR sy-vline 
WA_HUWM_INITIAL_LOAD_STR-UII sy-vline      INTO ld_text SEPARATED BY SPACE.

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