ABAP Select data from SAP table DCSQLTCHK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DCSQLTCHK
*  INTO TABLE @DATA(IT_DCSQLTCHK2).
*--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_DCSQLTCHK INDEX 1 INTO DATA(WA_DCSQLTCHK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DCSQLTCHK>-NAMECHECK = 1.
<DCSQLTCHK>-STRUCTCHG = 1.
<DCSQLTCHK>-VALHDCHK = 1.
<DCSQLTCHK>-NTABACT = 1.
<DCSQLTCHK>-NTABGEN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DCSQLTCHK-AUTH_CHK, sy-vline,
  WA_DCSQLTCHK-POOLCHG, sy-vline,
  WA_DCSQLTCHK-POSTRUCHK, sy-vline,
  WA_DCSQLTCHK-POKEYCHK, sy-vline,
  WA_DCSQLTCHK-PODATACHK, sy-vline,
  WA_DCSQLTCHK-CLKEYCHK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DCSQLTCHK 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_DCSQLTCHK 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_DCSQLTCHK INTO WA_DCSQLTCHK.


*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_DCSQLTCHK_STR, 
NAMECHECK TYPE STRING,
STRUCTCHG TYPE STRING,
VALHDCHK TYPE STRING,
NTABACT TYPE STRING,
NTABGEN TYPE STRING,
AUTH_CHK TYPE STRING,
POOLCHG TYPE STRING,
POSTRUCHK TYPE STRING,
POKEYCHK TYPE STRING,
PODATACHK TYPE STRING,
CLKEYCHK TYPE STRING,
CLDATACHK TYPE STRING,
DECCHK TYPE STRING,
INT8CHK TYPE STRING,
FDNAMCHK TYPE STRING,
DUPFLDCHK TYPE STRING,
VALFDCHK TYPE STRING,
TABCATCHK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DCSQLTCHK_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_DCSQLTCHK_STR-NAMECHECK sy-vline 
WA_DCSQLTCHK_STR-STRUCTCHG sy-vline 
WA_DCSQLTCHK_STR-VALHDCHK sy-vline 
WA_DCSQLTCHK_STR-NTABACT sy-vline 
WA_DCSQLTCHK_STR-NTABGEN sy-vline 
WA_DCSQLTCHK_STR-AUTH_CHK sy-vline 
WA_DCSQLTCHK_STR-POOLCHG sy-vline 
WA_DCSQLTCHK_STR-POSTRUCHK sy-vline 
WA_DCSQLTCHK_STR-POKEYCHK sy-vline 
WA_DCSQLTCHK_STR-PODATACHK sy-vline 
WA_DCSQLTCHK_STR-CLKEYCHK sy-vline 
WA_DCSQLTCHK_STR-CLDATACHK sy-vline 
WA_DCSQLTCHK_STR-DECCHK sy-vline 
WA_DCSQLTCHK_STR-INT8CHK sy-vline 
WA_DCSQLTCHK_STR-FDNAMCHK sy-vline 
WA_DCSQLTCHK_STR-DUPFLDCHK sy-vline 
WA_DCSQLTCHK_STR-VALFDCHK sy-vline 
WA_DCSQLTCHK_STR-TABCATCHK sy-vline      INTO ld_text SEPARATED BY SPACE.

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