ABAP Select data from SAP table EWA_EL_GENILOBJ_META into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWA_EL_GENILOBJ_META
*  INTO TABLE @DATA(IT_EWA_EL_GENILOBJ_META2).
*--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_EWA_EL_GENILOBJ_META INDEX 1 INTO DATA(WA_EWA_EL_GENILOBJ_META2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWA_EL_GENILOBJ_META>-COMPONENT_NAME = 1.
<EWA_EL_GENILOBJ_META>-OBJECT_NAME = 1.
<EWA_EL_GENILOBJ_META>-OBJECT_KIND = 1.
<EWA_EL_GENILOBJ_META>-KEY_STRUCT = 1.
<EWA_EL_GENILOBJ_META>-ATTR_STRUCT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWA_EL_GENILOBJ_META-CREATE_STRUCT, sy-vline,
  WA_EWA_EL_GENILOBJ_META-ROOT_OBJECT, sy-vline,
  WA_EWA_EL_GENILOBJ_META-RESULT_OBJ_NAME, sy-vline,
  WA_EWA_EL_GENILOBJ_META-OBJECTTYPE, sy-vline,
  WA_EWA_EL_GENILOBJ_META-KEYSTRUCTNAME, sy-vline,
  WA_EWA_EL_GENILOBJ_META-BODETAILS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWA_EL_GENILOBJ_META 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_EWA_EL_GENILOBJ_META 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_EWA_EL_GENILOBJ_META INTO WA_EWA_EL_GENILOBJ_META.


*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_EWA_EL_GENILOBJ_META_STR, 
COMPONENT_NAME TYPE STRING,
OBJECT_NAME TYPE STRING,
OBJECT_KIND TYPE STRING,
KEY_STRUCT TYPE STRING,
ATTR_STRUCT TYPE STRING,
CREATE_STRUCT TYPE STRING,
ROOT_OBJECT TYPE STRING,
RESULT_OBJ_NAME TYPE STRING,
OBJECTTYPE TYPE STRING,
KEYSTRUCTNAME TYPE STRING,
BODETAILS TYPE STRING,
BORELATIONS TYPE STRING,
ATTRSTRUCTNAME TYPE STRING,
ATTRMAPPING TYPE STRING,
ATTRMAPPINGS TYPE STRING,
READERDOMAIN TYPE STRING,
RELATIONS TYPE STRING,
METHODS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWA_EL_GENILOBJ_META_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_EWA_EL_GENILOBJ_META_STR-COMPONENT_NAME sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-OBJECT_NAME sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-OBJECT_KIND sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-KEY_STRUCT sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-ATTR_STRUCT sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-CREATE_STRUCT sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-ROOT_OBJECT sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-RESULT_OBJ_NAME sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-OBJECTTYPE sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-KEYSTRUCTNAME sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-BODETAILS sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-BORELATIONS sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-ATTRSTRUCTNAME sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-ATTRMAPPING sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-ATTRMAPPINGS sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-READERDOMAIN sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-RELATIONS sy-vline 
WA_EWA_EL_GENILOBJ_META_STR-METHODS sy-vline      INTO ld_text SEPARATED BY SPACE.

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