ABAP Select data from SAP table TTEPDT_HEADER_CL0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TTEPDT_HEADER_CL0 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 TTEPDT_HEADER_CL0. 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 TTEPDT_HEADER_CL0 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_TTEPDT_HEADER_CL0 TYPE STANDARD TABLE OF TTEPDT_HEADER_CL0,
      WA_TTEPDT_HEADER_CL0 TYPE TTEPDT_HEADER_CL0,
      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: <TTEPDT_HEADER_CL0> TYPE TTEPDT_HEADER_CL0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TTEPDT_HEADER_CL0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TTEPDT_HEADER_CL0
  INTO TABLE IT_TTEPDT_HEADER_CL0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TTEPDT_HEADER_CL0
*  INTO TABLE @DATA(IT_TTEPDT_HEADER_CL02).
*--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_TTEPDT_HEADER_CL0 INDEX 1 INTO DATA(WA_TTEPDT_HEADER_CL02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TTEPDT_HEADER_CL0 ASSIGNING <TTEPDT_HEADER_CL0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TTEPDT_HEADER_CL0>-COMMAND = 1.
<TTEPDT_HEADER_CL0>-PROCESSINGMODE = 1.
<TTEPDT_HEADER_CL0>-TRACEMODE = 1.
<TTEPDT_HEADER_CL0>-TTESESSIONID = 1.
<TTEPDT_HEADER_CL0>-TEXTOUTPUT = 1.

ENDLOOP.

LOOP AT IT_TTEPDT_HEADER_CL0 INTO WA_TTEPDT_HEADER_CL0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TTEPDT_HEADER_CL0-LANGUAGE, sy-vline,
  WA_TTEPDT_HEADER_CL0-SYSTEMID1, sy-vline,
  WA_TTEPDT_HEADER_CL0-SYSTEMID2, sy-vline,
  WA_TTEPDT_HEADER_CL0-SYSTEMVERSION, sy-vline,
  WA_TTEPDT_HEADER_CL0-INTERFACEVERSION, sy-vline,
  WA_TTEPDT_HEADER_CL0-LEGALENTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TTEPDT_HEADER_CL0 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_TTEPDT_HEADER_CL0 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_TTEPDT_HEADER_CL0 INTO WA_TTEPDT_HEADER_CL0.


*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_TTEPDT_HEADER_CL0_STR, 
COMMAND TYPE STRING,
PROCESSINGMODE TYPE STRING,
TRACEMODE TYPE STRING,
TTESESSIONID TYPE STRING,
TEXTOUTPUT TYPE STRING,
LANGUAGE TYPE STRING,
SYSTEMID1 TYPE STRING,
SYSTEMID2 TYPE STRING,
SYSTEMVERSION TYPE STRING,
INTERFACEVERSION TYPE STRING,
LEGALENTITY TYPE STRING,
OWNBUSPARTID TYPE STRING,
CALLINGDOCID1 TYPE STRING,
CALLINGDOCID2 TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
BUSTRANSACTION TYPE STRING,
TTEVERSION TYPE STRING,
RETURNCODE TYPE STRING,
TAXCODEREQUIRED TYPE STRING,
TAXDATETYPE TYPE STRING,
TAXDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TTEPDT_HEADER_CL0_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_TTEPDT_HEADER_CL0_STR-COMMAND sy-vline 
WA_TTEPDT_HEADER_CL0_STR-PROCESSINGMODE sy-vline 
WA_TTEPDT_HEADER_CL0_STR-TRACEMODE sy-vline 
WA_TTEPDT_HEADER_CL0_STR-TTESESSIONID sy-vline 
WA_TTEPDT_HEADER_CL0_STR-TEXTOUTPUT sy-vline 
WA_TTEPDT_HEADER_CL0_STR-LANGUAGE sy-vline 
WA_TTEPDT_HEADER_CL0_STR-SYSTEMID1 sy-vline 
WA_TTEPDT_HEADER_CL0_STR-SYSTEMID2 sy-vline 
WA_TTEPDT_HEADER_CL0_STR-SYSTEMVERSION sy-vline 
WA_TTEPDT_HEADER_CL0_STR-INTERFACEVERSION sy-vline 
WA_TTEPDT_HEADER_CL0_STR-LEGALENTITY sy-vline 
WA_TTEPDT_HEADER_CL0_STR-OWNBUSPARTID sy-vline 
WA_TTEPDT_HEADER_CL0_STR-CALLINGDOCID1 sy-vline 
WA_TTEPDT_HEADER_CL0_STR-CALLINGDOCID2 sy-vline 
WA_TTEPDT_HEADER_CL0_STR-DOCUMENTCURRENCY sy-vline 
WA_TTEPDT_HEADER_CL0_STR-BUSTRANSACTION sy-vline 
WA_TTEPDT_HEADER_CL0_STR-TTEVERSION sy-vline 
WA_TTEPDT_HEADER_CL0_STR-RETURNCODE sy-vline 
WA_TTEPDT_HEADER_CL0_STR-TAXCODEREQUIRED sy-vline 
WA_TTEPDT_HEADER_CL0_STR-TAXDATETYPE sy-vline 
WA_TTEPDT_HEADER_CL0_STR-TAXDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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