ABAP Select data from SAP table Q3321 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q3321 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 Q3321. 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 Q3321 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_Q3321 TYPE STANDARD TABLE OF Q3321,
      WA_Q3321 TYPE Q3321,
      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: <Q3321> TYPE Q3321.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q3321.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q3321
  INTO TABLE IT_Q3321.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q3321
*  INTO TABLE @DATA(IT_Q33212).
*--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_Q3321 INDEX 1 INTO DATA(WA_Q33212).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q3321 ASSIGNING <Q3321>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q3321>-DEPTT = 1.
<Q3321>-SLAND = 1.
<Q3321>-CITYC = 1.
<Q3321>-REGIO = 1.
<Q3321>-LANDX = 1.

ENDLOOP.

LOOP AT IT_Q3321 INTO WA_Q3321.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q3321-BEZEC, sy-vline,
  WA_Q3321-BEZER, sy-vline,
  WA_Q3321-SCLTT, sy-vline,
  WA_Q3321-SCDTT, sy-vline,
  WA_Q3321-SCCTT, sy-vline,
  WA_Q3321-SLTXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q3321 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_Q3321 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_Q3321 INTO WA_Q3321.


*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_Q3321_STR, 
DEPTT TYPE STRING,
SLAND TYPE STRING,
CITYC TYPE STRING,
REGIO TYPE STRING,
LANDX TYPE STRING,
BEZEC TYPE STRING,
BEZER TYPE STRING,
SCLTT TYPE STRING,
SCDTT TYPE STRING,
SCCTT TYPE STRING,
SLTXT TYPE STRING,
EMTXT TYPE STRING,
ENMIN TYPE STRING,
ENMAP TYPE STRING,
DARBL TYPE STRING,
RWAER TYPE STRING,
RDATM TYPE STRING,
STDUR TYPE STRING,
RTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q3321_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_Q3321_STR-DEPTT sy-vline 
WA_Q3321_STR-SLAND sy-vline 
WA_Q3321_STR-CITYC sy-vline 
WA_Q3321_STR-REGIO sy-vline 
WA_Q3321_STR-LANDX sy-vline 
WA_Q3321_STR-BEZEC sy-vline 
WA_Q3321_STR-BEZER sy-vline 
WA_Q3321_STR-SCLTT sy-vline 
WA_Q3321_STR-SCDTT sy-vline 
WA_Q3321_STR-SCCTT sy-vline 
WA_Q3321_STR-SLTXT sy-vline 
WA_Q3321_STR-EMTXT sy-vline 
WA_Q3321_STR-ENMIN sy-vline 
WA_Q3321_STR-ENMAP sy-vline 
WA_Q3321_STR-DARBL sy-vline 
WA_Q3321_STR-RWAER sy-vline 
WA_Q3321_STR-RDATM sy-vline 
WA_Q3321_STR-STDUR sy-vline 
WA_Q3321_STR-RTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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