ABAP Select data from SAP table T606G into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T606G 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 T606G. 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 T606G 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_T606G TYPE STANDARD TABLE OF T606G,
      WA_T606G TYPE T606G,
      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: <T606G> TYPE T606G.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T606G.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T606G
  INTO TABLE IT_T606G.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T606G
*  INTO TABLE @DATA(IT_T606G2).
*--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_T606G INDEX 1 INTO DATA(WA_T606G2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T606G ASSIGNING <T606G>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T606G>-MANDT = 1.
<T606G>-GEGRU = 1.
<T606G>-PMAST = 1.
<T606G>-LGDET = 1.
<T606G>-INDEI = 1.

ENDLOOP.

LOOP AT IT_T606G INTO WA_T606G.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T606G-DISZC, sy-vline,
  WA_T606G-DCOCO, sy-vline,
  WA_T606G-BOMAC, sy-vline,
  WA_T606G-GGLND, sy-vline,
  WA_T606G-DEMIN, sy-vline,
  WA_T606G-GGREU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T606G 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_T606G 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_T606G INTO WA_T606G.


*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_T606G_STR, 
MANDT TYPE STRING,
GEGRU TYPE STRING,
PMAST TYPE STRING,
LGDET TYPE STRING,
INDEI TYPE STRING,
DISZC TYPE STRING,
DCOCO TYPE STRING,
BOMAC TYPE STRING,
GGLND TYPE STRING,
DEMIN TYPE STRING,
GGREU TYPE STRING,
ADCHK TYPE STRING,
KUEOR TYPE STRING,
SLCHK TYPE STRING,
GGAUD TYPE STRING,
LDXDT TYPE STRING,
ARTRE TYPE STRING,
SHCCO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T606G_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_T606G_STR-MANDT sy-vline 
WA_T606G_STR-GEGRU sy-vline 
WA_T606G_STR-PMAST sy-vline 
WA_T606G_STR-LGDET sy-vline 
WA_T606G_STR-INDEI sy-vline 
WA_T606G_STR-DISZC sy-vline 
WA_T606G_STR-DCOCO sy-vline 
WA_T606G_STR-BOMAC sy-vline 
WA_T606G_STR-GGLND sy-vline 
WA_T606G_STR-DEMIN sy-vline 
WA_T606G_STR-GGREU sy-vline 
WA_T606G_STR-ADCHK sy-vline 
WA_T606G_STR-KUEOR sy-vline 
WA_T606G_STR-SLCHK sy-vline 
WA_T606G_STR-GGAUD sy-vline 
WA_T606G_STR-LDXDT sy-vline 
WA_T606G_STR-ARTRE sy-vline 
WA_T606G_STR-SHCCO sy-vline      INTO ld_text SEPARATED BY SPACE.

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