ABAP Select data from SAP table V_TMCPF_AB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TMCPF_AB
*  INTO TABLE @DATA(IT_V_TMCPF_AB2).
*--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_V_TMCPF_AB INDEX 1 INTO DATA(WA_V_TMCPF_AB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TMCPF_AB>-MANDT = 1.
<V_TMCPF_AB>-LFARN = 1.
<V_TMCPF_AB>-LFARV = 1.
<V_TMCPF_AB>-BOART = 1.
<V_TMCPF_AB>-LFTYPV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TMCPF_AB-KNPRS, sy-vline,
  WA_V_TMCPF_AB-POSVO, sy-vline,
  WA_V_TMCPF_AB-PDKUR, sy-vline,
  WA_V_TMCPF_AB-BTEXT, sy-vline,
  WA_V_TMCPF_AB-VTEXT, sy-vline,
  WA_V_TMCPF_AB-WZKUR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TMCPF_AB 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_V_TMCPF_AB 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_V_TMCPF_AB INTO WA_V_TMCPF_AB.


*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_V_TMCPF_AB_STR, 
MANDT TYPE STRING,
LFARN TYPE STRING,
LFARV TYPE STRING,
BOART TYPE STRING,
LFTYPV TYPE STRING,
KNPRS TYPE STRING,
POSVO TYPE STRING,
PDKUR TYPE STRING,
BTEXT TYPE STRING,
VTEXT TYPE STRING,
WZKUR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TMCPF_AB_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_V_TMCPF_AB_STR-MANDT sy-vline 
WA_V_TMCPF_AB_STR-LFARN sy-vline 
WA_V_TMCPF_AB_STR-LFARV sy-vline 
WA_V_TMCPF_AB_STR-BOART sy-vline 
WA_V_TMCPF_AB_STR-LFTYPV sy-vline 
WA_V_TMCPF_AB_STR-KNPRS sy-vline 
WA_V_TMCPF_AB_STR-POSVO sy-vline 
WA_V_TMCPF_AB_STR-PDKUR sy-vline 
WA_V_TMCPF_AB_STR-BTEXT sy-vline 
WA_V_TMCPF_AB_STR-VTEXT sy-vline 
WA_V_TMCPF_AB_STR-WZKUR sy-vline      INTO ld_text SEPARATED BY SPACE.

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