ABAP Select data from SAP table ITAGCYDOCTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ITAGCYDOCTR
*  INTO TABLE @DATA(IT_ITAGCYDOCTR2).
*--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_ITAGCYDOCTR INDEX 1 INTO DATA(WA_ITAGCYDOCTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ITAGCYDOCTR>-MANDT = 1.
<ITAGCYDOCTR>-OPBEL = 1.
<ITAGCYDOCTR>-OPUPW = 1.
<ITAGCYDOCTR>-OPUPK = 1.
<ITAGCYDOCTR>-OPUPZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ITAGCYDOCTR-GPART, sy-vline,
  WA_ITAGCYDOCTR-VKONT, sy-vline,
  WA_ITAGCYDOCTR-VTREF, sy-vline,
  WA_ITAGCYDOCTR-WAERS, sy-vline,
  WA_ITAGCYDOCTR-XBLNR, sy-vline,
  WA_ITAGCYDOCTR-AUGST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ITAGCYDOCTR 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_ITAGCYDOCTR 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_ITAGCYDOCTR INTO WA_ITAGCYDOCTR.


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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field VTREF_ORIG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ITAGCYDOCTR-VTREF_ORIG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ITAGCYDOCTR-VTREF_ORIG.
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_ITAGCYDOCTR_STR, 
MANDT TYPE STRING,
OPBEL TYPE STRING,
OPUPW TYPE STRING,
OPUPK TYPE STRING,
OPUPZ TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
WAERS TYPE STRING,
XBLNR TYPE STRING,
AUGST TYPE STRING,
DOCTYPE TYPE STRING,
OPBEL_ORIG TYPE STRING,
OPUPW_ORIG TYPE STRING,
OPUPK_ORIG TYPE STRING,
OPUPZ_ORIG TYPE STRING,
GPART_ORIG TYPE STRING,
VKONT_ORIG TYPE STRING,
VTREF_ORIG TYPE STRING,
WAERS_ORIG TYPE STRING,
CRDATE TYPE STRING,
CRNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ITAGCYDOCTR_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_ITAGCYDOCTR_STR-MANDT sy-vline 
WA_ITAGCYDOCTR_STR-OPBEL sy-vline 
WA_ITAGCYDOCTR_STR-OPUPW sy-vline 
WA_ITAGCYDOCTR_STR-OPUPK sy-vline 
WA_ITAGCYDOCTR_STR-OPUPZ sy-vline 
WA_ITAGCYDOCTR_STR-GPART sy-vline 
WA_ITAGCYDOCTR_STR-VKONT sy-vline 
WA_ITAGCYDOCTR_STR-VTREF sy-vline 
WA_ITAGCYDOCTR_STR-WAERS sy-vline 
WA_ITAGCYDOCTR_STR-XBLNR sy-vline 
WA_ITAGCYDOCTR_STR-AUGST sy-vline 
WA_ITAGCYDOCTR_STR-DOCTYPE sy-vline 
WA_ITAGCYDOCTR_STR-OPBEL_ORIG sy-vline 
WA_ITAGCYDOCTR_STR-OPUPW_ORIG sy-vline 
WA_ITAGCYDOCTR_STR-OPUPK_ORIG sy-vline 
WA_ITAGCYDOCTR_STR-OPUPZ_ORIG sy-vline 
WA_ITAGCYDOCTR_STR-GPART_ORIG sy-vline 
WA_ITAGCYDOCTR_STR-VKONT_ORIG sy-vline 
WA_ITAGCYDOCTR_STR-VTREF_ORIG sy-vline 
WA_ITAGCYDOCTR_STR-WAERS_ORIG sy-vline 
WA_ITAGCYDOCTR_STR-CRDATE sy-vline 
WA_ITAGCYDOCTR_STR-CRNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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