ABAP Select data from SAP table ESH_OM_CDATATY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_OM_CDATATY
*  INTO TABLE @DATA(IT_ESH_OM_CDATATY2).
*--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_ESH_OM_CDATATY INDEX 1 INTO DATA(WA_ESH_OM_CDATATY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_OM_CDATATY>-MANDT = 1.
<ESH_OM_CDATATY>-MODEL_GUID = 1.
<ESH_OM_CDATATY>-DATA_TYPE_GUID = 1.
<ESH_OM_CDATATY>-DATA_TYPE = 1.
<ESH_OM_CDATATY>-DOMNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_OM_CDATATY-DATATYPE, sy-vline,
  WA_ESH_OM_CDATATY-INTTYPE, sy-vline,
  WA_ESH_OM_CDATATY-LENG, sy-vline,
  WA_ESH_OM_CDATATY-INTLEN, sy-vline,
  WA_ESH_OM_CDATATY-DECIMALS, sy-vline,
  WA_ESH_OM_CDATATY-LOWERCASE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_OM_CDATATY 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_ESH_OM_CDATATY 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_ESH_OM_CDATATY INTO WA_ESH_OM_CDATATY.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_ESH_OM_CDATATY-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_OM_CDATATY-DATATYPE.
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_ESH_OM_CDATATY_STR, 
MANDT TYPE STRING,
MODEL_GUID TYPE STRING,
DATA_TYPE_GUID TYPE STRING,
DATA_TYPE TYPE STRING,
DOMNAME TYPE STRING,
DATATYPE TYPE STRING,
INTTYPE TYPE STRING,
LENG TYPE STRING,
INTLEN TYPE STRING,
DECIMALS TYPE STRING,
LOWERCASE TYPE STRING,
CONVEXIT TYPE STRING,
OUTPUTLEN TYPE STRING,
SIGNFLAG TYPE STRING,
FIXED_UOM TYPE STRING,
TEXT_REPOSITORYT TYPE STRING,
TEXT_REPOSITORYF TYPE STRING,
DATA_ELEMENT TYPE STRING,
DGEN_INFO_GUID TYPE STRING,
DMODNAM_SEG TYPE STRING,
DTMESTMP_MOD_SEG TYPE STRING,
DAREA_MOD_SEG TYPE STRING,
DCRENAM_SEG TYPE STRING,
DTMESTMP_CRE_SEG TYPE STRING,
DAREA_CRE_SEG TYPE STRING,
DAENAM_SEG TYPE STRING,
DTMESTMP_AEN_SEG TYPE STRING,
ORG_SYSREL_GUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_OM_CDATATY_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_ESH_OM_CDATATY_STR-MANDT sy-vline 
WA_ESH_OM_CDATATY_STR-MODEL_GUID sy-vline 
WA_ESH_OM_CDATATY_STR-DATA_TYPE_GUID sy-vline 
WA_ESH_OM_CDATATY_STR-DATA_TYPE sy-vline 
WA_ESH_OM_CDATATY_STR-DOMNAME sy-vline 
WA_ESH_OM_CDATATY_STR-DATATYPE sy-vline 
WA_ESH_OM_CDATATY_STR-INTTYPE sy-vline 
WA_ESH_OM_CDATATY_STR-LENG sy-vline 
WA_ESH_OM_CDATATY_STR-INTLEN sy-vline 
WA_ESH_OM_CDATATY_STR-DECIMALS sy-vline 
WA_ESH_OM_CDATATY_STR-LOWERCASE sy-vline 
WA_ESH_OM_CDATATY_STR-CONVEXIT sy-vline 
WA_ESH_OM_CDATATY_STR-OUTPUTLEN sy-vline 
WA_ESH_OM_CDATATY_STR-SIGNFLAG sy-vline 
WA_ESH_OM_CDATATY_STR-FIXED_UOM sy-vline 
WA_ESH_OM_CDATATY_STR-TEXT_REPOSITORYT sy-vline 
WA_ESH_OM_CDATATY_STR-TEXT_REPOSITORYF sy-vline 
WA_ESH_OM_CDATATY_STR-DATA_ELEMENT sy-vline 
WA_ESH_OM_CDATATY_STR-DGEN_INFO_GUID sy-vline 
WA_ESH_OM_CDATATY_STR-DMODNAM_SEG sy-vline 
WA_ESH_OM_CDATATY_STR-DTMESTMP_MOD_SEG sy-vline 
WA_ESH_OM_CDATATY_STR-DAREA_MOD_SEG sy-vline 
WA_ESH_OM_CDATATY_STR-DCRENAM_SEG sy-vline 
WA_ESH_OM_CDATATY_STR-DTMESTMP_CRE_SEG sy-vline 
WA_ESH_OM_CDATATY_STR-DAREA_CRE_SEG sy-vline 
WA_ESH_OM_CDATATY_STR-DAENAM_SEG sy-vline 
WA_ESH_OM_CDATATY_STR-DTMESTMP_AEN_SEG sy-vline 
WA_ESH_OM_CDATATY_STR-ORG_SYSREL_GUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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