ABAP Select data from SAP table DMEE_EXIT_INTERFACE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DMEE_EXIT_INTERFACE
*  INTO TABLE @DATA(IT_DMEE_EXIT_INTERFACE2).
*--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_DMEE_EXIT_INTERFACE INDEX 1 INTO DATA(WA_DMEE_EXIT_INTERFACE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DMEE_EXIT_INTERFACE>-NODE = 1.
<DMEE_EXIT_INTERFACE>-TREE_TYPE = 1.
<DMEE_EXIT_INTERFACE>-TREE_ID = 1.
<DMEE_EXIT_INTERFACE>-VERSION = 1.
<DMEE_EXIT_INTERFACE>-NODE_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DMEE_EXIT_INTERFACE-TECH_NAME, sy-vline,
  WA_DMEE_EXIT_INTERFACE-REF_NAME, sy-vline,
  WA_DMEE_EXIT_INTERFACE-PARENT_ID, sy-vline,
  WA_DMEE_EXIT_INTERFACE-BROTHER_ID, sy-vline,
  WA_DMEE_EXIT_INTERFACE-FIRSTCHILD_ID, sy-vline,
  WA_DMEE_EXIT_INTERFACE-NODE_TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DMEE_EXIT_INTERFACE 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_DMEE_EXIT_INTERFACE 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_DMEE_EXIT_INTERFACE INTO WA_DMEE_EXIT_INTERFACE.


*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.

*Conversion exit AE226, internal->external for field P_VALUE
CALL FUNCTION 'CONVERSION_EXIT_AE226_OUTPUT'
  EXPORTING
    input =                      WA_DMEE_EXIT_INTERFACE-P_VALUE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DMEE_EXIT_INTERFACE-P_VALUE.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DMEE_EXIT_INTERFACE_STR, 
NODE TYPE STRING,
TREE_TYPE TYPE STRING,
TREE_ID TYPE STRING,
VERSION TYPE STRING,
NODE_ID TYPE STRING,
TECH_NAME TYPE STRING,
REF_NAME TYPE STRING,
PARENT_ID TYPE STRING,
BROTHER_ID TYPE STRING,
FIRSTCHILD_ID TYPE STRING,
NODE_TYPE TYPE STRING,
LENGTH TYPE STRING,
DATA_TYPE TYPE STRING,
EX_STATUS TYPE STRING,
LEV TYPE STRING,
X_COMPLTAB TYPE STRING,
TAB_KEYFLD TYPE STRING,
ATOM_HANDL TYPE STRING,
MP_OFFSET TYPE STRING,
MP_SC_TAB TYPE STRING,
MP_SC_FLD TYPE STRING,
MP_SC_OFFSET TYPE STRING,
MP_IF_TP TYPE STRING,
MP_SC_NODE TYPE STRING,
MP_SC_NODE_ATTR TYPE STRING,
MP_SC_REF_NAME TYPE STRING,
MP_CONST TYPE STRING,
CV_RULE TYPE STRING,
MP_EXIT_FUNC TYPE STRING,
MP_SELECTION TYPE STRING,
MP_CUKY_TAB TYPE STRING,
MP_CUKY_FLD TYPE STRING,
INT_DATA_TYPE TYPE STRING,
TDFORM_NAME TYPE STRING,
SHIFTED_OUTPUT TYPE STRING,
SEGM_END TYPE STRING,
SEGM_CR TYPE STRING,
SEGM_LF TYPE STRING,
CRLF_ONLY TYPE STRING,
CK_EXIT_FUNC TYPE STRING,
REACT_LEV_SCREEN TYPE STRING,
REACT_LEV_EXIT TYPE STRING,
MSG_CLASS_SCREEN TYPE STRING,
MSG_NUM_SCREEN TYPE STRING,
MSG_CLASS_EXIT TYPE STRING,
MSG_NUM_EXIT TYPE STRING,
TRAILER TYPE STRING,
CV_SOURCE_FORMAT TYPE STRING,
LENGTH_IN_BYTES TYPE STRING,
NODE_VALUES TYPE STRING,
REF_NAME TYPE STRING,
O_VALUE TYPE STRING,
C_VALUE TYPE STRING,
N_VALUE TYPE STRING,
P_VALUE TYPE STRING,
LENGTH TYPE STRING,
COUNTER TYPE STRING,
REF_TABLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DMEE_EXIT_INTERFACE_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_DMEE_EXIT_INTERFACE_STR-NODE sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-TREE_TYPE sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-TREE_ID sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-VERSION sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-NODE_ID sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-TECH_NAME sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-REF_NAME sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-PARENT_ID sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-BROTHER_ID sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-FIRSTCHILD_ID sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-NODE_TYPE sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-LENGTH sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-DATA_TYPE sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-EX_STATUS sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-LEV sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-X_COMPLTAB sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-TAB_KEYFLD sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-ATOM_HANDL sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_OFFSET sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_SC_TAB sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_SC_FLD sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_SC_OFFSET sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_IF_TP sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_SC_NODE sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_SC_NODE_ATTR sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_SC_REF_NAME sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_CONST sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-CV_RULE sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_EXIT_FUNC sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_SELECTION sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_CUKY_TAB sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MP_CUKY_FLD sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-INT_DATA_TYPE sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-TDFORM_NAME sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-SHIFTED_OUTPUT sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-SEGM_END sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-SEGM_CR sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-SEGM_LF sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-CRLF_ONLY sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-CK_EXIT_FUNC sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-REACT_LEV_SCREEN sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-REACT_LEV_EXIT sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MSG_CLASS_SCREEN sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MSG_NUM_SCREEN sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MSG_CLASS_EXIT sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-MSG_NUM_EXIT sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-TRAILER sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-CV_SOURCE_FORMAT sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-LENGTH_IN_BYTES sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-NODE_VALUES sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-REF_NAME sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-O_VALUE sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-C_VALUE sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-N_VALUE sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-P_VALUE sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-LENGTH sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-COUNTER sy-vline 
WA_DMEE_EXIT_INTERFACE_STR-REF_TABLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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