ABAP Select data from SAP table TQ30 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TQ30 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 TQ30. 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 TQ30 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_TQ30 TYPE STANDARD TABLE OF TQ30,
      WA_TQ30 TYPE TQ30,
      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: <TQ30> TYPE TQ30.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TQ30.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TQ30
  INTO TABLE IT_TQ30.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TQ30
*  INTO TABLE @DATA(IT_TQ302).
*--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_TQ30 INDEX 1 INTO DATA(WA_TQ302).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TQ30 ASSIGNING <TQ30>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TQ30>-MANDT = 1.
<TQ30>-ART = 1.
<TQ30>-PPLVERW = 1.
<TQ30>-BILDS = 1.
<TQ30>-VEMENGE = 1.

ENDLOOP.

LOOP AT IT_TQ30 INTO WA_TQ30.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TQ30-VEVERSION, sy-vline,
  WA_TQ30-VEDATUM, sy-vline,
  WA_TQ30-KZVEWERKS, sy-vline,
  WA_TQ30-KZPZDR, sy-vline,
  WA_TQ30-KZPADR, sy-vline,
  WA_TQ30-KZMESSAGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TQ30 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_TQ30 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_TQ30 INTO WA_TQ30.


*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 VEVERSION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TQ30-VEVERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TQ30-VEVERSION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_TQ30-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TQ30-VORNR.
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_TQ30_STR, 
MANDT TYPE STRING,
ART TYPE STRING,
PPLVERW TYPE STRING,
BILDS TYPE STRING,
VEMENGE TYPE STRING,
VEVERSION TYPE STRING,
VEDATUM TYPE STRING,
KZVEWERKS TYPE STRING,
KZPZDR TYPE STRING,
KZPADR TYPE STRING,
KZMESSAGE TYPE STRING,
STSMA TYPE STRING,
ERFSICHT TYPE STRING,
STEUS TYPE STRING,
QMART TYPE STRING,
VORNR TYPE STRING,
PRART TYPE STRING,
EINEMELD TYPE STRING,
AUART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TQ30_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_TQ30_STR-MANDT sy-vline 
WA_TQ30_STR-ART sy-vline 
WA_TQ30_STR-PPLVERW sy-vline 
WA_TQ30_STR-BILDS sy-vline 
WA_TQ30_STR-VEMENGE sy-vline 
WA_TQ30_STR-VEVERSION sy-vline 
WA_TQ30_STR-VEDATUM sy-vline 
WA_TQ30_STR-KZVEWERKS sy-vline 
WA_TQ30_STR-KZPZDR sy-vline 
WA_TQ30_STR-KZPADR sy-vline 
WA_TQ30_STR-KZMESSAGE sy-vline 
WA_TQ30_STR-STSMA sy-vline 
WA_TQ30_STR-ERFSICHT sy-vline 
WA_TQ30_STR-STEUS sy-vline 
WA_TQ30_STR-QMART sy-vline 
WA_TQ30_STR-VORNR sy-vline 
WA_TQ30_STR-PRART sy-vline 
WA_TQ30_STR-EINEMELD sy-vline 
WA_TQ30_STR-AUART sy-vline      INTO ld_text SEPARATED BY SPACE.

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