ABAP Select data from SAP table V_TRSTHV_ECMC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_TRSTHV_ECMC 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_TRSTHV_ECMC. 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_TRSTHV_ECMC 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_TRSTHV_ECMC TYPE STANDARD TABLE OF V_TRSTHV_ECMC,
      WA_V_TRSTHV_ECMC TYPE V_TRSTHV_ECMC,
      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_TRSTHV_ECMC> TYPE V_TRSTHV_ECMC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TRSTHV_ECMC
*  INTO TABLE @DATA(IT_V_TRSTHV_ECMC2).
*--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_TRSTHV_ECMC INDEX 1 INTO DATA(WA_V_TRSTHV_ECMC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TRSTHV_ECMC>-MANDT = 1.
<V_TRSTHV_ECMC>-APPL = 1.
<V_TRSTHV_ECMC>-TABNM = 1.
<V_TRSTHV_ECMC>-FIENM = 1.
<V_TRSTHV_ECMC>-ROLNM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TRSTHV_ECMC-DOMNM, sy-vline,
  WA_V_TRSTHV_ECMC-HCLASS, sy-vline,
  WA_V_TRSTHV_ECMC-HIENM, sy-vline,
  WA_V_TRSTHV_ECMC-HMODE, sy-vline,
  WA_V_TRSTHV_ECMC-PROPOSAL, sy-vline,
  WA_V_TRSTHV_ECMC-MASK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TRSTHV_ECMC 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_TRSTHV_ECMC 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_TRSTHV_ECMC INTO WA_V_TRSTHV_ECMC.


*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_TRSTHV_ECMC_STR, 
MANDT TYPE STRING,
APPL TYPE STRING,
TABNM TYPE STRING,
FIENM TYPE STRING,
ROLNM TYPE STRING,
DOMNM TYPE STRING,
HCLASS TYPE STRING,
HIENM TYPE STRING,
HMODE TYPE STRING,
PROPOSAL TYPE STRING,
MASK TYPE STRING,
HSEL TYPE STRING,
HART TYPE STRING,
PRSTN TYPE STRING,
INTPR TYPE STRING,
TOPDOWN TYPE STRING,
SLEVEL TYPE STRING,
HSUM TYPE STRING,
TEXT10 TYPE STRING,
TEXT20 TYPE STRING,
TEXT40 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TRSTHV_ECMC_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_TRSTHV_ECMC_STR-MANDT sy-vline 
WA_V_TRSTHV_ECMC_STR-APPL sy-vline 
WA_V_TRSTHV_ECMC_STR-TABNM sy-vline 
WA_V_TRSTHV_ECMC_STR-FIENM sy-vline 
WA_V_TRSTHV_ECMC_STR-ROLNM sy-vline 
WA_V_TRSTHV_ECMC_STR-DOMNM sy-vline 
WA_V_TRSTHV_ECMC_STR-HCLASS sy-vline 
WA_V_TRSTHV_ECMC_STR-HIENM sy-vline 
WA_V_TRSTHV_ECMC_STR-HMODE sy-vline 
WA_V_TRSTHV_ECMC_STR-PROPOSAL sy-vline 
WA_V_TRSTHV_ECMC_STR-MASK sy-vline 
WA_V_TRSTHV_ECMC_STR-HSEL sy-vline 
WA_V_TRSTHV_ECMC_STR-HART sy-vline 
WA_V_TRSTHV_ECMC_STR-PRSTN sy-vline 
WA_V_TRSTHV_ECMC_STR-INTPR sy-vline 
WA_V_TRSTHV_ECMC_STR-TOPDOWN sy-vline 
WA_V_TRSTHV_ECMC_STR-SLEVEL sy-vline 
WA_V_TRSTHV_ECMC_STR-HSUM sy-vline 
WA_V_TRSTHV_ECMC_STR-TEXT10 sy-vline 
WA_V_TRSTHV_ECMC_STR-TEXT20 sy-vline 
WA_V_TRSTHV_ECMC_STR-TEXT40 sy-vline      INTO ld_text SEPARATED BY SPACE.

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