ABAP Select data from SAP table TDS_HDFLOWCOMV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_HDFLOWCOMV
*  INTO TABLE @DATA(IT_TDS_HDFLOWCOMV2).
*--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_TDS_HDFLOWCOMV INDEX 1 INTO DATA(WA_TDS_HDFLOWCOMV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_HDFLOWCOMV>-DOCTYPE = 1.
<TDS_HDFLOWCOMV>-DOCNUM = 1.
<TDS_HDFLOWCOMV>-PRE_DOCNUM = 1.
<TDS_HDFLOWCOMV>-HLEVEL = 1.
<TDS_HDFLOWCOMV>-DESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_HDFLOWCOMV-ERZET, sy-vline,
  WA_TDS_HDFLOWCOMV-ERDAT, sy-vline,
  WA_TDS_HDFLOWCOMV-RFWRT, sy-vline,
  WA_TDS_HDFLOWCOMV-WAERS, sy-vline,
  WA_TDS_HDFLOWCOMV-STATUS, sy-vline,
  WA_TDS_HDFLOWCOMV-VKORG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_HDFLOWCOMV 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_TDS_HDFLOWCOMV 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_TDS_HDFLOWCOMV INTO WA_TDS_HDFLOWCOMV.


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

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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TDS_HDFLOWCOMV-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_HDFLOWCOMV-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TDS_HDFLOWCOMV-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_HDFLOWCOMV-LOGSYS.
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_TDS_HDFLOWCOMV_STR, 
DOCTYPE TYPE STRING,
DOCNUM TYPE STRING,
PRE_DOCNUM TYPE STRING,
HLEVEL TYPE STRING,
DESCRIPTION TYPE STRING,
ERZET TYPE STRING,
ERDAT TYPE STRING,
RFWRT TYPE STRING,
WAERS TYPE STRING,
STATUS TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
LOGSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_HDFLOWCOMV_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_TDS_HDFLOWCOMV_STR-DOCTYPE sy-vline 
WA_TDS_HDFLOWCOMV_STR-DOCNUM sy-vline 
WA_TDS_HDFLOWCOMV_STR-PRE_DOCNUM sy-vline 
WA_TDS_HDFLOWCOMV_STR-HLEVEL sy-vline 
WA_TDS_HDFLOWCOMV_STR-DESCRIPTION sy-vline 
WA_TDS_HDFLOWCOMV_STR-ERZET sy-vline 
WA_TDS_HDFLOWCOMV_STR-ERDAT sy-vline 
WA_TDS_HDFLOWCOMV_STR-RFWRT sy-vline 
WA_TDS_HDFLOWCOMV_STR-WAERS sy-vline 
WA_TDS_HDFLOWCOMV_STR-STATUS sy-vline 
WA_TDS_HDFLOWCOMV_STR-VKORG sy-vline 
WA_TDS_HDFLOWCOMV_STR-VTWEG sy-vline 
WA_TDS_HDFLOWCOMV_STR-BUKRS sy-vline 
WA_TDS_HDFLOWCOMV_STR-GJAHR sy-vline 
WA_TDS_HDFLOWCOMV_STR-LOGSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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