ABAP Select data from SAP table TDS_SLINECOMI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TDS_SLINECOMI 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_SLINECOMI. 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_SLINECOMI 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_SLINECOMI TYPE STANDARD TABLE OF TDS_SLINECOMI,
      WA_TDS_SLINECOMI TYPE TDS_SLINECOMI,
      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_SLINECOMI> TYPE TDS_SLINECOMI.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_SLINECOMI
*  INTO TABLE @DATA(IT_TDS_SLINECOMI2).
*--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_SLINECOMI INDEX 1 INTO DATA(WA_TDS_SLINECOMI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_SLINECOMI>-SELKZ = 1.
<TDS_SLINECOMI>-POSNR = 1.
<TDS_SLINECOMI>-ETENR = 1.
<TDS_SLINECOMI>-PRGBZ = 1.
<TDS_SLINECOMI>-ETDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_SLINECOMI-WMENG, sy-vline,
  WA_TDS_SLINECOMI-CMENG, sy-vline,
  WA_TDS_SLINECOMI-BMENG, sy-vline,
  WA_TDS_SLINECOMI-VRKME, sy-vline,
  WA_TDS_SLINECOMI-LIFSP, sy-vline,
  WA_TDS_SLINECOMI-VSMNG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_SLINECOMI 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_SLINECOMI 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_SLINECOMI INTO WA_TDS_SLINECOMI.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_TDS_SLINECOMI_STR, 
SELKZ TYPE STRING,
POSNR TYPE STRING,
ETENR TYPE STRING,
PRGBZ TYPE STRING,
ETDAT TYPE STRING,
WMENG TYPE STRING,
CMENG TYPE STRING,
BMENG TYPE STRING,
VRKME TYPE STRING,
LIFSP TYPE STRING,
VSMNG TYPE STRING,
ROMS1 TYPE STRING,
ETTYP TYPE STRING,
WADAT TYPE STRING,
LDDAT TYPE STRING,
MBDAT TYPE STRING,
TDDAT TYPE STRING,
EZEIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_SLINECOMI_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_SLINECOMI_STR-SELKZ sy-vline 
WA_TDS_SLINECOMI_STR-POSNR sy-vline 
WA_TDS_SLINECOMI_STR-ETENR sy-vline 
WA_TDS_SLINECOMI_STR-PRGBZ sy-vline 
WA_TDS_SLINECOMI_STR-ETDAT sy-vline 
WA_TDS_SLINECOMI_STR-WMENG sy-vline 
WA_TDS_SLINECOMI_STR-CMENG sy-vline 
WA_TDS_SLINECOMI_STR-BMENG sy-vline 
WA_TDS_SLINECOMI_STR-VRKME sy-vline 
WA_TDS_SLINECOMI_STR-LIFSP sy-vline 
WA_TDS_SLINECOMI_STR-VSMNG sy-vline 
WA_TDS_SLINECOMI_STR-ROMS1 sy-vline 
WA_TDS_SLINECOMI_STR-ETTYP sy-vline 
WA_TDS_SLINECOMI_STR-WADAT sy-vline 
WA_TDS_SLINECOMI_STR-LDDAT sy-vline 
WA_TDS_SLINECOMI_STR-MBDAT sy-vline 
WA_TDS_SLINECOMI_STR-TDDAT sy-vline 
WA_TDS_SLINECOMI_STR-EZEIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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