ABAP Select data from SAP table THM_RO_SCREEN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM THM_RO_SCREEN
*  INTO TABLE @DATA(IT_THM_RO_SCREEN2).
*--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_THM_RO_SCREEN INDEX 1 INTO DATA(WA_THM_RO_SCREEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<THM_RO_SCREEN>-RIDXRT = 1.
<THM_RO_SCREEN>-SSTAT = 1.
<THM_RO_SCREEN>-RIDEXT = 1.
<THM_RO_SCREEN>-XTEXT = 1.
<THM_RO_SCREEN>-DGUELTAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_THM_RO_SCREEN-CRUSER, sy-vline,
  WA_THM_RO_SCREEN-DCRDAT, sy-vline,
  WA_THM_RO_SCREEN-TCRTIM, sy-vline,
  WA_THM_RO_SCREEN-UPUSER, sy-vline,
  WA_THM_RO_SCREEN-DUPDAT, sy-vline,
  WA_THM_RO_SCREEN-TUPTIM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_THM_RO_SCREEN 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_THM_RO_SCREEN 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_THM_RO_SCREEN INTO WA_THM_RO_SCREEN.


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

*Conversion exit ALPHA, internal->external for field RWKN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_THM_RO_SCREEN-RWKN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_THM_RO_SCREEN-RWKN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_THM_RO_SCREEN-PARTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_THM_RO_SCREEN-PARTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GRUPP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_THM_RO_SCREEN-GRUPP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_THM_RO_SCREEN-GRUPP.
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_THM_RO_SCREEN_STR, 
RIDXRT TYPE STRING,
SSTAT TYPE STRING,
RIDEXT TYPE STRING,
XTEXT TYPE STRING,
DGUELTAB TYPE STRING,
CRUSER TYPE STRING,
DCRDAT TYPE STRING,
TCRTIM TYPE STRING,
UPUSER TYPE STRING,
DUPDAT TYPE STRING,
TUPTIM TYPE STRING,
OBJNR TYPE STRING,
BUKRS TYPE STRING,
RWKN TYPE STRING,
RPORTB TYPE STRING,
RDEALER TYPE STRING,
PARTNR TYPE STRING,
WAEHRUNG TYPE STRING,
ARR TYPE STRING,
SLPG TYPE STRING,
GRUPP TYPE STRING,
EBENE TYPE STRING,
DISPW TYPE STRING,
RLDEPO TYPE STRING,
GFORM TYPE STRING,
GDETAIL TYPE STRING,
RMBEWREG TYPE STRING,
DBLFZ TYPE STRING,
DELFZ TYPE STRING,
CFART TYPE STRING,
DFAELL TYPE STRING,
BCWHR TYPE STRING,
SCWHR TYPE STRING,
TEXT50 TYPE STRING,
SZBMETH TYPE STRING,
DBERVON TYPE STRING,
DBERBIS TYPE STRING,
SSIGN TYPE STRING,
ABASTAGE TYPE STRING,
ATAGE TYPE STRING,
PKOND TYPE STRING,
SZSREF TYPE STRING,
SZSREFVZ TYPE STRING,
SOFFSET TYPE STRING,
DZFEST TYPE STRING,
SNOMWHR TYPE STRING,
BNOMINAL TYPE STRING,
BNWHR TYPE STRING,
SNWHR TYPE STRING,
RISKCAT TYPE STRING,
TRANSCAT TYPE STRING,
TRANSACTIVITY TYPE STRING,
STATUS TYPE STRING,
S_FLAG TYPE STRING,
S_POSITION TYPE STRING,
CELLTAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_THM_RO_SCREEN_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_THM_RO_SCREEN_STR-RIDXRT sy-vline 
WA_THM_RO_SCREEN_STR-SSTAT sy-vline 
WA_THM_RO_SCREEN_STR-RIDEXT sy-vline 
WA_THM_RO_SCREEN_STR-XTEXT sy-vline 
WA_THM_RO_SCREEN_STR-DGUELTAB sy-vline 
WA_THM_RO_SCREEN_STR-CRUSER sy-vline 
WA_THM_RO_SCREEN_STR-DCRDAT sy-vline 
WA_THM_RO_SCREEN_STR-TCRTIM sy-vline 
WA_THM_RO_SCREEN_STR-UPUSER sy-vline 
WA_THM_RO_SCREEN_STR-DUPDAT sy-vline 
WA_THM_RO_SCREEN_STR-TUPTIM sy-vline 
WA_THM_RO_SCREEN_STR-OBJNR sy-vline 
WA_THM_RO_SCREEN_STR-BUKRS sy-vline 
WA_THM_RO_SCREEN_STR-RWKN sy-vline 
WA_THM_RO_SCREEN_STR-RPORTB sy-vline 
WA_THM_RO_SCREEN_STR-RDEALER sy-vline 
WA_THM_RO_SCREEN_STR-PARTNR sy-vline 
WA_THM_RO_SCREEN_STR-WAEHRUNG sy-vline 
WA_THM_RO_SCREEN_STR-ARR sy-vline 
WA_THM_RO_SCREEN_STR-SLPG sy-vline 
WA_THM_RO_SCREEN_STR-GRUPP sy-vline 
WA_THM_RO_SCREEN_STR-EBENE sy-vline 
WA_THM_RO_SCREEN_STR-DISPW sy-vline 
WA_THM_RO_SCREEN_STR-RLDEPO sy-vline 
WA_THM_RO_SCREEN_STR-GFORM sy-vline 
WA_THM_RO_SCREEN_STR-GDETAIL sy-vline 
WA_THM_RO_SCREEN_STR-RMBEWREG sy-vline 
WA_THM_RO_SCREEN_STR-DBLFZ sy-vline 
WA_THM_RO_SCREEN_STR-DELFZ sy-vline 
WA_THM_RO_SCREEN_STR-CFART sy-vline 
WA_THM_RO_SCREEN_STR-DFAELL sy-vline 
WA_THM_RO_SCREEN_STR-BCWHR sy-vline 
WA_THM_RO_SCREEN_STR-SCWHR sy-vline 
WA_THM_RO_SCREEN_STR-TEXT50 sy-vline 
WA_THM_RO_SCREEN_STR-SZBMETH sy-vline 
WA_THM_RO_SCREEN_STR-DBERVON sy-vline 
WA_THM_RO_SCREEN_STR-DBERBIS sy-vline 
WA_THM_RO_SCREEN_STR-SSIGN sy-vline 
WA_THM_RO_SCREEN_STR-ABASTAGE sy-vline 
WA_THM_RO_SCREEN_STR-ATAGE sy-vline 
WA_THM_RO_SCREEN_STR-PKOND sy-vline 
WA_THM_RO_SCREEN_STR-SZSREF sy-vline 
WA_THM_RO_SCREEN_STR-SZSREFVZ sy-vline 
WA_THM_RO_SCREEN_STR-SOFFSET sy-vline 
WA_THM_RO_SCREEN_STR-DZFEST sy-vline 
WA_THM_RO_SCREEN_STR-SNOMWHR sy-vline 
WA_THM_RO_SCREEN_STR-BNOMINAL sy-vline 
WA_THM_RO_SCREEN_STR-BNWHR sy-vline 
WA_THM_RO_SCREEN_STR-SNWHR sy-vline 
WA_THM_RO_SCREEN_STR-RISKCAT sy-vline 
WA_THM_RO_SCREEN_STR-TRANSCAT sy-vline 
WA_THM_RO_SCREEN_STR-TRANSACTIVITY sy-vline 
WA_THM_RO_SCREEN_STR-STATUS sy-vline 
WA_THM_RO_SCREEN_STR-S_FLAG sy-vline 
WA_THM_RO_SCREEN_STR-S_POSITION sy-vline 
WA_THM_RO_SCREEN_STR-CELLTAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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