ABAP Select data from SAP table UCD_SX_EXEC_DOCTYPE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UCD_SX_EXEC_DOCTYPE
*  INTO TABLE @DATA(IT_UCD_SX_EXEC_DOCTYPE2).
*--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_UCD_SX_EXEC_DOCTYPE INDEX 1 INTO DATA(WA_UCD_SX_EXEC_DOCTYPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UCD_SX_EXEC_DOCTYPE>-DOCTYPESEM = 1.
<UCD_SX_EXEC_DOCTYPE>-T_VALUE_DOCTYPE = 1.
<UCD_SX_EXEC_DOCTYPE>-S_CHPROP_DOCTYPE = 1.
<UCD_SX_EXEC_DOCTYPE>-PLEVEL = 1.
<UCD_SX_EXEC_DOCTYPE>-DOCUSAGE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UCD_SX_EXEC_DOCTYPE-BALCHECK, sy-vline,
  WA_UCD_SX_EXEC_DOCTYPE-TCDOCFLG, sy-vline,
  WA_UCD_SX_EXEC_DOCTYPE-LCDOCFLG, sy-vline,
  WA_UCD_SX_EXEC_DOCTYPE-GCDOCFLG, sy-vline,
  WA_UCD_SX_EXEC_DOCTYPE-QUDOCFLG, sy-vline,
  WA_UCD_SX_EXEC_DOCTYPE-MANDOCFLG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UCD_SX_EXEC_DOCTYPE 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_UCD_SX_EXEC_DOCTYPE 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_UCD_SX_EXEC_DOCTYPE INTO WA_UCD_SX_EXEC_DOCTYPE.


*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_UCD_SX_EXEC_DOCTYPE_STR, 
DOCTYPESEM TYPE STRING,
T_VALUE_DOCTYPE TYPE STRING,
S_CHPROP_DOCTYPE TYPE STRING,
PLEVEL TYPE STRING,
DOCUSAGE TYPE STRING,
BALCHECK TYPE STRING,
TCDOCFLG TYPE STRING,
LCDOCFLG TYPE STRING,
GCDOCFLG TYPE STRING,
QUDOCFLG TYPE STRING,
MANDOCFLG TYPE STRING,
CTDOCFLG TYPE STRING,
DTAXDFLG TYPE STRING,
DTAXCFLG TYPE STRING,
DTAXSOURCE TYPE STRING,
DOCDCINV_AUTOM TYPE STRING,
DTAXRATE TYPE STRING,
NRRNG TYPE STRING,
DOCAUTOINV TYPE STRING,
DOCREFRESH TYPE STRING,
VAL_METHOD_TOTAL TYPE STRING,
VAL_METHOD_HEAD TYPE STRING,
VAL_METHOD_LINE TYPE STRING,
O_ACC_DOCTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UCD_SX_EXEC_DOCTYPE_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_UCD_SX_EXEC_DOCTYPE_STR-DOCTYPESEM sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-T_VALUE_DOCTYPE sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-S_CHPROP_DOCTYPE sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-PLEVEL sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-DOCUSAGE sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-BALCHECK sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-TCDOCFLG sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-LCDOCFLG sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-GCDOCFLG sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-QUDOCFLG sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-MANDOCFLG sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-CTDOCFLG sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-DTAXDFLG sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-DTAXCFLG sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-DTAXSOURCE sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-DOCDCINV_AUTOM sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-DTAXRATE sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-NRRNG sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-DOCAUTOINV sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-DOCREFRESH sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-VAL_METHOD_TOTAL sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-VAL_METHOD_HEAD sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-VAL_METHOD_LINE sy-vline 
WA_UCD_SX_EXEC_DOCTYPE_STR-O_ACC_DOCTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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