ABAP Select data from SAP table CMX_DA_W_DATAPOINT_INFO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMX_DA_W_DATAPOINT_INFO
*  INTO TABLE @DATA(IT_CMX_DA_W_DATAPOINT_INFO2).
*--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_CMX_DA_W_DATAPOINT_INFO INDEX 1 INTO DATA(WA_CMX_DA_W_DATAPOINT_INFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMX_DA_W_DATAPOINT_INFO>-SERVICE = 1.
<CMX_DA_W_DATAPOINT_INFO>-PARENT = 1.
<CMX_DA_W_DATAPOINT_INFO>-NODENAME = 1.
<CMX_DA_W_DATAPOINT_INFO>-CHILDREN = 1.
<CMX_DA_W_DATAPOINT_INFO>-STEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMX_DA_W_DATAPOINT_INFO-ACTIVE, sy-vline,
  WA_CMX_DA_W_DATAPOINT_INFO-VALID, sy-vline,
  WA_CMX_DA_W_DATAPOINT_INFO-TYPEKIND, sy-vline,
  WA_CMX_DA_W_DATAPOINT_INFO-TYPENAME, sy-vline,
  WA_CMX_DA_W_DATAPOINT_INFO-LENGTH, sy-vline,
  WA_CMX_DA_W_DATAPOINT_INFO-DECIMALS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMX_DA_W_DATAPOINT_INFO 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_CMX_DA_W_DATAPOINT_INFO 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_CMX_DA_W_DATAPOINT_INFO INTO WA_CMX_DA_W_DATAPOINT_INFO.


*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_CMX_DA_W_DATAPOINT_INFO_STR, 
SERVICE TYPE STRING,
PARENT TYPE STRING,
NODENAME TYPE STRING,
CHILDREN TYPE STRING,
STEXT TYPE STRING,
ACTIVE TYPE STRING,
VALID TYPE STRING,
TYPEKIND TYPE STRING,
TYPENAME TYPE STRING,
LENGTH TYPE STRING,
DECIMALS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMX_DA_W_DATAPOINT_INFO_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_CMX_DA_W_DATAPOINT_INFO_STR-SERVICE sy-vline 
WA_CMX_DA_W_DATAPOINT_INFO_STR-PARENT sy-vline 
WA_CMX_DA_W_DATAPOINT_INFO_STR-NODENAME sy-vline 
WA_CMX_DA_W_DATAPOINT_INFO_STR-CHILDREN sy-vline 
WA_CMX_DA_W_DATAPOINT_INFO_STR-STEXT sy-vline 
WA_CMX_DA_W_DATAPOINT_INFO_STR-ACTIVE sy-vline 
WA_CMX_DA_W_DATAPOINT_INFO_STR-VALID sy-vline 
WA_CMX_DA_W_DATAPOINT_INFO_STR-TYPEKIND sy-vline 
WA_CMX_DA_W_DATAPOINT_INFO_STR-TYPENAME sy-vline 
WA_CMX_DA_W_DATAPOINT_INFO_STR-LENGTH sy-vline 
WA_CMX_DA_W_DATAPOINT_INFO_STR-DECIMALS sy-vline      INTO ld_text SEPARATED BY SPACE.

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