ABAP Select data from SAP table TPFVQ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TPFVQ
*  INTO TABLE @DATA(IT_TPFVQ2).
*--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_TPFVQ INDEX 1 INTO DATA(WA_TPFVQ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TPFVQ>-PFNAME = 1.
<TPFVQ>-AENZEIT = 1.
<TPFVQ>-AENDATE = 1.
<TPFVQ>-GWRQSTACK = 1.
<TPFVQ>-GWMAXRQ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TPFVQ-GWMAXCONN, sy-vline,
  WA_TPFVQ-GWMAXWP, sy-vline,
  WA_TPFVQ-GWMAXCPW, sy-vline,
  WA_TPFVQ-GWMRQCLU, sy-vline,
  WA_TPFVQ-GWPRIRQ, sy-vline,
  WA_TPFVQ-GWSECRQ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TPFVQ 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_TPFVQ 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_TPFVQ INTO WA_TPFVQ.


*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_TPFVQ_STR, 
PFNAME TYPE STRING,
AENZEIT TYPE STRING,
AENDATE TYPE STRING,
GWRQSTACK TYPE STRING,
GWMAXRQ TYPE STRING,
GWMAXCONN TYPE STRING,
GWMAXWP TYPE STRING,
GWMAXCPW TYPE STRING,
GWMRQCLU TYPE STRING,
GWPRIRQ TYPE STRING,
GWSECRQ TYPE STRING,
GWREMSH TYPE STRING,
DPDISPENV TYPE STRING,
DPIPKEY TYPE STRING,
DPMONAR TYPE STRING,
DPWPCLAS TYPE STRING,
TMCNTMO TYPE STRING,
TMSHTIM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TPFVQ_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_TPFVQ_STR-PFNAME sy-vline 
WA_TPFVQ_STR-AENZEIT sy-vline 
WA_TPFVQ_STR-AENDATE sy-vline 
WA_TPFVQ_STR-GWRQSTACK sy-vline 
WA_TPFVQ_STR-GWMAXRQ sy-vline 
WA_TPFVQ_STR-GWMAXCONN sy-vline 
WA_TPFVQ_STR-GWMAXWP sy-vline 
WA_TPFVQ_STR-GWMAXCPW sy-vline 
WA_TPFVQ_STR-GWMRQCLU sy-vline 
WA_TPFVQ_STR-GWPRIRQ sy-vline 
WA_TPFVQ_STR-GWSECRQ sy-vline 
WA_TPFVQ_STR-GWREMSH sy-vline 
WA_TPFVQ_STR-DPDISPENV sy-vline 
WA_TPFVQ_STR-DPIPKEY sy-vline 
WA_TPFVQ_STR-DPMONAR sy-vline 
WA_TPFVQ_STR-DPWPCLAS sy-vline 
WA_TPFVQ_STR-TMCNTMO sy-vline 
WA_TPFVQ_STR-TMSHTIM sy-vline      INTO ld_text SEPARATED BY SPACE.

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