ABAP Select data from SAP table ISI_POD_HEAD_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISI_POD_HEAD_ITEM
*  INTO TABLE @DATA(IT_ISI_POD_HEAD_ITEM2).
*--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_ISI_POD_HEAD_ITEM INDEX 1 INTO DATA(WA_ISI_POD_HEAD_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISI_POD_HEAD_ITEM>-VBELN = 1.
<ISI_POD_HEAD_ITEM>-VERUR = 1.
<ISI_POD_HEAD_ITEM>-LIFNR = 1.
<ISI_POD_HEAD_ITEM>-BZIRK = 1.
<ISI_POD_HEAD_ITEM>-VSTEL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISI_POD_HEAD_ITEM-VKORG, sy-vline,
  WA_ISI_POD_HEAD_ITEM-LFART, sy-vline,
  WA_ISI_POD_HEAD_ITEM-AUTLF, sy-vline,
  WA_ISI_POD_HEAD_ITEM-KZAZU, sy-vline,
  WA_ISI_POD_HEAD_ITEM-WADAT, sy-vline,
  WA_ISI_POD_HEAD_ITEM-LDDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISI_POD_HEAD_ITEM 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_ISI_POD_HEAD_ITEM 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_ISI_POD_HEAD_ITEM INTO WA_ISI_POD_HEAD_ITEM.


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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field VGBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISI_POD_HEAD_ITEM-VGBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISI_POD_HEAD_ITEM-VGBEL.
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_ISI_POD_HEAD_ITEM_STR, 
VBELN TYPE STRING,
VERUR TYPE STRING,
LIFNR TYPE STRING,
BZIRK TYPE STRING,
VSTEL TYPE STRING,
VKORG TYPE STRING,
LFART TYPE STRING,
AUTLF TYPE STRING,
KZAZU TYPE STRING,
WADAT TYPE STRING,
LDDAT TYPE STRING,
TDDAT TYPE STRING,
LFDAT TYPE STRING,
KODAT TYPE STRING,
WADAT_IST TYPE STRING,
BORGR_GRP TYPE STRING,
WBSTK TYPE STRING,
PDSTK TYPE STRING,
POD_FLAG TYPE STRING,
PODVWK TYPE STRING,
PODVWK_TST TYPE STRING,
HANDLE TYPE STRING,
POSNR TYPE STRING,
PSTYV TYPE STRING,
GRKOR TYPE STRING,
ERNAM TYPE STRING,
ERZET TYPE STRING,
ERDAT TYPE STRING,
MATNR TYPE STRING,
MATWA TYPE STRING,
MATKL TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
LICHN TYPE STRING,
KDMAT TYPE STRING,
PRODH TYPE STRING,
LFIMG TYPE STRING,
MEINS TYPE STRING,
VRKME TYPE STRING,
UMVKZ TYPE STRING,
UMVKN TYPE STRING,
WBSTA TYPE STRING,
PDSTA TYPE STRING,
IDNLF TYPE STRING,
ORMNG TYPE STRING,
VGBEL TYPE STRING,
VGPOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISI_POD_HEAD_ITEM_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_ISI_POD_HEAD_ITEM_STR-VBELN sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-VERUR sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-LIFNR sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-BZIRK sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-VSTEL sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-VKORG sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-LFART sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-AUTLF sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-KZAZU sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-WADAT sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-LDDAT sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-TDDAT sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-LFDAT sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-KODAT sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-WADAT_IST sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-BORGR_GRP sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-WBSTK sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-PDSTK sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-POD_FLAG sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-PODVWK sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-PODVWK_TST sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-HANDLE sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-POSNR sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-PSTYV sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-GRKOR sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-ERNAM sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-ERZET sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-ERDAT sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-MATNR sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-MATWA sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-MATKL sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-WERKS sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-LGORT sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-CHARG sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-LICHN sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-KDMAT sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-PRODH sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-LFIMG sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-MEINS sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-VRKME sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-UMVKZ sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-UMVKN sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-WBSTA sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-PDSTA sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-IDNLF sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-ORMNG sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-VGBEL sy-vline 
WA_ISI_POD_HEAD_ITEM_STR-VGPOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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