ABAP Select data from SAP table TQ34 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TQ34 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 TQ34. 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 TQ34 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_TQ34 TYPE STANDARD TABLE OF TQ34,
      WA_TQ34 TYPE TQ34,
      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: <TQ34> TYPE TQ34.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TQ34.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TQ34
  INTO TABLE IT_TQ34.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TQ34
*  INTO TABLE @DATA(IT_TQ342).
*--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_TQ34 INDEX 1 INTO DATA(WA_TQ342).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TQ34 ASSIGNING <TQ34>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TQ34>-MANDT = 1.
<TQ34>-ART = 1.
<TQ34>-PPL = 1.
<TQ34>-SPEZUEBER = 1.
<TQ34>-CONF = 1.

ENDLOOP.

LOOP AT IT_TQ34 INTO WA_TQ34.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TQ34-TLS, sy-vline,
  WA_TQ34-APP, sy-vline,
  WA_TQ34-MER, sy-vline,
  WA_TQ34-INSMK, sy-vline,
  WA_TQ34-AVE, sy-vline,
  WA_TQ34-STICHPRVER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TQ34 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_TQ34 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_TQ34 INTO WA_TQ34.


*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_TQ34_STR, 
MANDT TYPE STRING,
ART TYPE STRING,
PPL TYPE STRING,
SPEZUEBER TYPE STRING,
CONF TYPE STRING,
TLS TYPE STRING,
APP TYPE STRING,
MER TYPE STRING,
INSMK TYPE STRING,
AVE TYPE STRING,
STICHPRVER TYPE STRING,
DYNREGEL TYPE STRING,
SPROZ TYPE STRING,
HPZ TYPE STRING,
DYN TYPE STRING,
MPB TYPE STRING,
MST TYPE STRING,
EIN TYPE STRING,
MPDAU TYPE STRING,
CHG TYPE STRING,
QKZVERF TYPE STRING,
QPMAT TYPE STRING,
APA TYPE STRING,
AFR TYPE STRING,
MMA TYPE STRING,
FEH TYPE STRING,
PRFRQ TYPE STRING,
MS_FLAG TYPE STRING,
CHG_ORIG_17 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TQ34_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_TQ34_STR-MANDT sy-vline 
WA_TQ34_STR-ART sy-vline 
WA_TQ34_STR-PPL sy-vline 
WA_TQ34_STR-SPEZUEBER sy-vline 
WA_TQ34_STR-CONF sy-vline 
WA_TQ34_STR-TLS sy-vline 
WA_TQ34_STR-APP sy-vline 
WA_TQ34_STR-MER sy-vline 
WA_TQ34_STR-INSMK sy-vline 
WA_TQ34_STR-AVE sy-vline 
WA_TQ34_STR-STICHPRVER sy-vline 
WA_TQ34_STR-DYNREGEL sy-vline 
WA_TQ34_STR-SPROZ sy-vline 
WA_TQ34_STR-HPZ sy-vline 
WA_TQ34_STR-DYN sy-vline 
WA_TQ34_STR-MPB sy-vline 
WA_TQ34_STR-MST sy-vline 
WA_TQ34_STR-EIN sy-vline 
WA_TQ34_STR-MPDAU sy-vline 
WA_TQ34_STR-CHG sy-vline 
WA_TQ34_STR-QKZVERF sy-vline 
WA_TQ34_STR-QPMAT sy-vline 
WA_TQ34_STR-APA sy-vline 
WA_TQ34_STR-AFR sy-vline 
WA_TQ34_STR-MMA sy-vline 
WA_TQ34_STR-FEH sy-vline 
WA_TQ34_STR-PRFRQ sy-vline 
WA_TQ34_STR-MS_FLAG sy-vline 
WA_TQ34_STR-CHG_ORIG_17 sy-vline      INTO ld_text SEPARATED BY SPACE.

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