ABAP Select data from SAP table DTATCHC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTATCHC
*  INTO TABLE @DATA(IT_DTATCHC2).
*--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_DTATCHC INDEX 1 INTO DATA(WA_DTATCHC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTATCHC>-CSOH = 1.
<DTATCHC>-CHDR = 1.
<DTATCHC>-CCRP = 1.
<DTATCHC>-C20 = 1.
<DTATCHC>-C20A = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTATCHC-C20B, sy-vline,
  WA_DTATCHC-C20Z, sy-vline,
  WA_DTATCHC-C25, sy-vline,
  WA_DTATCHC-C25A, sy-vline,
  WA_DTATCHC-C25Z, sy-vline,
  WA_DTATCHC-C32, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTATCHC 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_DTATCHC 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_DTATCHC INTO WA_DTATCHC.


*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_DTATCHC_STR, 
CSOH TYPE STRING,
CHDR TYPE STRING,
CCRP TYPE STRING,
C20 TYPE STRING,
C20A TYPE STRING,
C20B TYPE STRING,
C20Z TYPE STRING,
C25 TYPE STRING,
C25A TYPE STRING,
C25Z TYPE STRING,
C32 TYPE STRING,
C32A TYPE STRING,
C32B TYPE STRING,
C32C TYPE STRING,
C32Z TYPE STRING,
C50 TYPE STRING,
C50A TYPE STRING,
C50B TYPE STRING,
C50C TYPE STRING,
C50D TYPE STRING,
C50E TYPE STRING,
C50F TYPE STRING,
C50G TYPE STRING,
C50Z TYPE STRING,
C55 TYPE STRING,
C55A TYPE STRING,
C55B TYPE STRING,
C55C TYPE STRING,
C55D TYPE STRING,
C55E TYPE STRING,
C55F TYPE STRING,
C55G TYPE STRING,
C55H TYPE STRING,
C55I TYPE STRING,
C55J TYPE STRING,
C55Z TYPE STRING,
C59 TYPE STRING,
C59A TYPE STRING,
C59B TYPE STRING,
C59C TYPE STRING,
C59D TYPE STRING,
C59E TYPE STRING,
C59F TYPE STRING,
C59G TYPE STRING,
C59H TYPE STRING,
C59I TYPE STRING,
C59J TYPE STRING,
C59Z TYPE STRING,
C70 TYPE STRING,
C70A TYPE STRING,
C70B TYPE STRING,
C70C TYPE STRING,
C70D TYPE STRING,
C70E TYPE STRING,
C70F TYPE STRING,
C70G TYPE STRING,
C70Z TYPE STRING,
CETX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTATCHC_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_DTATCHC_STR-CSOH sy-vline 
WA_DTATCHC_STR-CHDR sy-vline 
WA_DTATCHC_STR-CCRP sy-vline 
WA_DTATCHC_STR-C20 sy-vline 
WA_DTATCHC_STR-C20A sy-vline 
WA_DTATCHC_STR-C20B sy-vline 
WA_DTATCHC_STR-C20Z sy-vline 
WA_DTATCHC_STR-C25 sy-vline 
WA_DTATCHC_STR-C25A sy-vline 
WA_DTATCHC_STR-C25Z sy-vline 
WA_DTATCHC_STR-C32 sy-vline 
WA_DTATCHC_STR-C32A sy-vline 
WA_DTATCHC_STR-C32B sy-vline 
WA_DTATCHC_STR-C32C sy-vline 
WA_DTATCHC_STR-C32Z sy-vline 
WA_DTATCHC_STR-C50 sy-vline 
WA_DTATCHC_STR-C50A sy-vline 
WA_DTATCHC_STR-C50B sy-vline 
WA_DTATCHC_STR-C50C sy-vline 
WA_DTATCHC_STR-C50D sy-vline 
WA_DTATCHC_STR-C50E sy-vline 
WA_DTATCHC_STR-C50F sy-vline 
WA_DTATCHC_STR-C50G sy-vline 
WA_DTATCHC_STR-C50Z sy-vline 
WA_DTATCHC_STR-C55 sy-vline 
WA_DTATCHC_STR-C55A sy-vline 
WA_DTATCHC_STR-C55B sy-vline 
WA_DTATCHC_STR-C55C sy-vline 
WA_DTATCHC_STR-C55D sy-vline 
WA_DTATCHC_STR-C55E sy-vline 
WA_DTATCHC_STR-C55F sy-vline 
WA_DTATCHC_STR-C55G sy-vline 
WA_DTATCHC_STR-C55H sy-vline 
WA_DTATCHC_STR-C55I sy-vline 
WA_DTATCHC_STR-C55J sy-vline 
WA_DTATCHC_STR-C55Z sy-vline 
WA_DTATCHC_STR-C59 sy-vline 
WA_DTATCHC_STR-C59A sy-vline 
WA_DTATCHC_STR-C59B sy-vline 
WA_DTATCHC_STR-C59C sy-vline 
WA_DTATCHC_STR-C59D sy-vline 
WA_DTATCHC_STR-C59E sy-vline 
WA_DTATCHC_STR-C59F sy-vline 
WA_DTATCHC_STR-C59G sy-vline 
WA_DTATCHC_STR-C59H sy-vline 
WA_DTATCHC_STR-C59I sy-vline 
WA_DTATCHC_STR-C59J sy-vline 
WA_DTATCHC_STR-C59Z sy-vline 
WA_DTATCHC_STR-C70 sy-vline 
WA_DTATCHC_STR-C70A sy-vline 
WA_DTATCHC_STR-C70B sy-vline 
WA_DTATCHC_STR-C70C sy-vline 
WA_DTATCHC_STR-C70D sy-vline 
WA_DTATCHC_STR-C70E sy-vline 
WA_DTATCHC_STR-C70F sy-vline 
WA_DTATCHC_STR-C70G sy-vline 
WA_DTATCHC_STR-C70Z sy-vline 
WA_DTATCHC_STR-CETX sy-vline      INTO ld_text SEPARATED BY SPACE.

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