ABAP Select data from SAP table T022 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP T022 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 T022. 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 T022 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_T022 TYPE STANDARD TABLE OF T022,
      WA_T022 TYPE T022,
      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: <T022> TYPE T022.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T022.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T022
  INTO TABLE IT_T022.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T022
*  INTO TABLE @DATA(IT_T0222).
*--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_T022 INDEX 1 INTO DATA(WA_T0222).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T022 ASSIGNING <T022>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T022>-ACTIVITY = 1.
<T022>-TAB_1 = 1.
<T022>-TAB_2 = 1.
<T022>-TAB_3 = 1.
<T022>-TAB_4 = 1.

ENDLOOP.

LOOP AT IT_T022 INTO WA_T022.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T022-VORGTYP, sy-vline,
  WA_T022-SATZTYP, sy-vline,
  WA_T022-SHWERT, sy-vline,
  WA_T022-BUPER0, sy-vline,
  WA_T022-KZKWAER, sy-vline,
  WA_T022-ROLLUP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T022 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_T022 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_T022 INTO WA_T022.


*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_T022_STR, 
ACTIVITY TYPE STRING,
TAB_1 TYPE STRING,
TAB_2 TYPE STRING,
TAB_3 TYPE STRING,
TAB_4 TYPE STRING,
VORGTYP TYPE STRING,
SATZTYP TYPE STRING,
SHWERT TYPE STRING,
BUPER0 TYPE STRING,
KZKWAER TYPE STRING,
ROLLUP TYPE STRING,
MZEILE TYPE STRING,
PEROK TYPE STRING,
RKBEL TYPE STRING,
GFORMAT TYPE STRING,
APPL TYPE STRING,
SUBAPPL TYPE STRING,
KOMP TYPE STRING,
NOTUSED TYPE STRING,
ACTGROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T022_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_T022_STR-ACTIVITY sy-vline 
WA_T022_STR-TAB_1 sy-vline 
WA_T022_STR-TAB_2 sy-vline 
WA_T022_STR-TAB_3 sy-vline 
WA_T022_STR-TAB_4 sy-vline 
WA_T022_STR-VORGTYP sy-vline 
WA_T022_STR-SATZTYP sy-vline 
WA_T022_STR-SHWERT sy-vline 
WA_T022_STR-BUPER0 sy-vline 
WA_T022_STR-KZKWAER sy-vline 
WA_T022_STR-ROLLUP sy-vline 
WA_T022_STR-MZEILE sy-vline 
WA_T022_STR-PEROK sy-vline 
WA_T022_STR-RKBEL sy-vline 
WA_T022_STR-GFORMAT sy-vline 
WA_T022_STR-APPL sy-vline 
WA_T022_STR-SUBAPPL sy-vline 
WA_T022_STR-KOMP sy-vline 
WA_T022_STR-NOTUSED sy-vline 
WA_T022_STR-ACTGROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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