ABAP Select data from SAP table IDWT_CIS_TRANS_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDWT_CIS_TRANS_HEADER
*  INTO TABLE @DATA(IT_IDWT_CIS_TRANS_HEADER2).
*--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_IDWT_CIS_TRANS_HEADER INDEX 1 INTO DATA(WA_IDWT_CIS_TRANS_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDWT_CIS_TRANS_HEADER>-CIS_GG_VERSN = 1.
<IDWT_CIS_TRANS_HEADER>-CIS_TCR = 1.
<IDWT_CIS_TRANS_HEADER>-CIS_MSG_CLS = 1.
<IDWT_CIS_TRANS_HEADER>-CIS_TRANS = 1.
<IDWT_CIS_TRANS_HEADER>-CIS_AUTH_MTHD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDWT_CIS_TRANS_HEADER-CIS_AUTH_ROLE, sy-vline,
  WA_IDWT_CIS_TRANS_HEADER-CIS_TRGT_ORG, sy-vline,
  WA_IDWT_CIS_TRANS_HEADER-CIS_PRDCT_NAME, sy-vline,
  WA_IDWT_CIS_TRANS_HEADER-CIS_PRDCT_VRSN, sy-vline,
  WA_IDWT_CIS_TRANS_HEADER-CIS_DEF_CRNCY, sy-vline,
  WA_IDWT_CIS_TRANS_HEADER-CIS_IR_MR_TYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDWT_CIS_TRANS_HEADER 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_IDWT_CIS_TRANS_HEADER 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_IDWT_CIS_TRANS_HEADER INTO WA_IDWT_CIS_TRANS_HEADER.


*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_IDWT_CIS_TRANS_HEADER_STR, 
CIS_GG_VERSN TYPE STRING,
CIS_TCR TYPE STRING,
CIS_MSG_CLS TYPE STRING,
CIS_TRANS TYPE STRING,
CIS_AUTH_MTHD TYPE STRING,
CIS_AUTH_ROLE TYPE STRING,
CIS_TRGT_ORG TYPE STRING,
CIS_PRDCT_NAME TYPE STRING,
CIS_PRDCT_VRSN TYPE STRING,
CIS_DEF_CRNCY TYPE STRING,
CIS_IR_MR_TYP TYPE STRING,
CIS_IR_VENDOR_ID TYPE STRING,
CIS_IR_VENDOR_NM TYPE STRING,
CIS_GG_QLFR TYPE STRING,
CIS_GG_FUNCT TYPE STRING,
CIS_GG_CRLTN TYPE STRING,
CIS_IR_MARK_64 TYPE STRING,
CIS_GG_INIT_URL TYPE STRING,
CIS_GG_CHIDTYP TYPE STRING,
CIS_IR_MARK_32 TYPE STRING,
CIS_EXTRA01 TYPE STRING,
CIS_EXTRA02 TYPE STRING,
CIS_EXTRA03 TYPE STRING,
CIS_EXTRA04 TYPE STRING,
CIS_EXTRA05 TYPE STRING,
CIS_EXTRA06 TYPE STRING,
CIS_EXTRA07 TYPE STRING,
CIS_EXTRA08 TYPE STRING,
CIS_EXTRA09 TYPE STRING,
CIS_EXTRA10 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDWT_CIS_TRANS_HEADER_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_IDWT_CIS_TRANS_HEADER_STR-CIS_GG_VERSN sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_TCR sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_MSG_CLS sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_TRANS sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_AUTH_MTHD sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_AUTH_ROLE sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_TRGT_ORG sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_PRDCT_NAME sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_PRDCT_VRSN sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_DEF_CRNCY sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_IR_MR_TYP sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_IR_VENDOR_ID sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_IR_VENDOR_NM sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_GG_QLFR sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_GG_FUNCT sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_GG_CRLTN sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_IR_MARK_64 sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_GG_INIT_URL sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_GG_CHIDTYP sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_IR_MARK_32 sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_EXTRA01 sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_EXTRA02 sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_EXTRA03 sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_EXTRA04 sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_EXTRA05 sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_EXTRA06 sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_EXTRA07 sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_EXTRA08 sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_EXTRA09 sy-vline 
WA_IDWT_CIS_TRANS_HEADER_STR-CIS_EXTRA10 sy-vline      INTO ld_text SEPARATED BY SPACE.

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