ABAP Select data from SAP table ESH_S_TREX_INDEX_META_DATA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ESH_S_TREX_INDEX_META_DATA 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_S_TREX_INDEX_META_DATA. 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_S_TREX_INDEX_META_DATA 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_S_TREX_INDEX_META_DATA TYPE STANDARD TABLE OF ESH_S_TREX_INDEX_META_DATA,
      WA_ESH_S_TREX_INDEX_META_DATA TYPE ESH_S_TREX_INDEX_META_DATA,
      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_S_TREX_INDEX_META_DATA> TYPE ESH_S_TREX_INDEX_META_DATA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_S_TREX_INDEX_META_DATA
*  INTO TABLE @DATA(IT_ESH_S_TREX_INDEX_META_DATA2).
*--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_S_TREX_INDEX_META_DATA INDEX 1 INTO DATA(WA_ESH_S_TREX_INDEX_META_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_S_TREX_INDEX_META_DATA>-TREX_INDEX_ID = 1.
<ESH_S_TREX_INDEX_META_DATA>-IS_CLASSIFICATION_INDEX = 1.
<ESH_S_TREX_INDEX_META_DATA>-IS_LANGUAGE_INDEX = 1.
<ESH_S_TREX_INDEX_META_DATA>-OBJECT_TYPE = 1.
<ESH_S_TREX_INDEX_META_DATA>-NODE_NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_S_TREX_INDEX_META_DATA-LANGUAGE_DEPENDENT_ATTRS, sy-vline,
  WA_ESH_S_TREX_INDEX_META_DATA-LANGUAGE_INDEPENDENT_ATTRS, sy-vline,
  WA_ESH_S_TREX_INDEX_META_DATA-DESCRIPTION, sy-vline,
  WA_ESH_S_TREX_INDEX_META_DATA-INDEX_TYPE, sy-vline,
  WA_ESH_S_TREX_INDEX_META_DATA-TREX_COMPONENT_DESCRIPTION, sy-vline,
  WA_ESH_S_TREX_INDEX_META_DATA-TREX_ATTRIBUTE_DEFINITION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_S_TREX_INDEX_META_DATA 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_S_TREX_INDEX_META_DATA 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_S_TREX_INDEX_META_DATA INTO WA_ESH_S_TREX_INDEX_META_DATA.


*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_ESH_S_TREX_INDEX_META_DATA_STR, 
TREX_INDEX_ID TYPE STRING,
IS_CLASSIFICATION_INDEX TYPE STRING,
IS_LANGUAGE_INDEX TYPE STRING,
OBJECT_TYPE TYPE STRING,
NODE_NAME TYPE STRING,
LANGUAGE_DEPENDENT_ATTRS TYPE STRING,
LANGUAGE_INDEPENDENT_ATTRS TYPE STRING,
DESCRIPTION TYPE STRING,
INDEX_TYPE TYPE STRING,
TREX_COMPONENT_DESCRIPTION TYPE STRING,
TREX_ATTRIBUTE_DEFINITION TYPE STRING,
TREX_KEY_ATTRIBUTES TYPE STRING,
DATA_DICTIONARY_FIELDS TYPE STRING,
TREX_LANGUAGE TYPE STRING,
TREX_ATTRIBUTE_RANGES TYPE STRING,
AUTHORIZATION_INDEX_DATA TYPE STRING,
AUTHORIZATION_CHECK TYPE STRING,
AUTHORIZATION_OBJECT TYPE STRING,
AUTHORIZATION_ESH TYPE STRING,
AUTHORIZATION_NODE TYPE STRING,
AUTHORIZATION_FIELD TYPE STRING,
AUTHORIZATION_FIELD_PATH TYPE STRING,
AUTHORIZATION_SOURCE_FOR TYPE STRING,
TREX_LANGUAGES_FOR_LANG_INDEX TYPE STRING,
URI_ATTRIBUTES TYPE STRING,
URI_ATTRIBUTES TYPE STRING,
MIME_TYPE TYPE STRING,
TREX_INDEX_MODE TYPE STRING,
SEMANTICS TYPE STRING,
LANGUAGE_ID_FIELD TYPE STRING,
SEARCHABLE_FILE_FIELD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_S_TREX_INDEX_META_DATA_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_S_TREX_INDEX_META_DATA_STR-TREX_INDEX_ID sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-IS_CLASSIFICATION_INDEX sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-IS_LANGUAGE_INDEX sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-OBJECT_TYPE sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-NODE_NAME sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-LANGUAGE_DEPENDENT_ATTRS sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-LANGUAGE_INDEPENDENT_ATTRS sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-DESCRIPTION sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-INDEX_TYPE sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-TREX_COMPONENT_DESCRIPTION sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-TREX_ATTRIBUTE_DEFINITION sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-TREX_KEY_ATTRIBUTES sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-DATA_DICTIONARY_FIELDS sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-TREX_LANGUAGE sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-TREX_ATTRIBUTE_RANGES sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-AUTHORIZATION_INDEX_DATA sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-AUTHORIZATION_CHECK sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-AUTHORIZATION_OBJECT sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-AUTHORIZATION_ESH sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-AUTHORIZATION_NODE sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-AUTHORIZATION_FIELD sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-AUTHORIZATION_FIELD_PATH sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-AUTHORIZATION_SOURCE_FOR sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-TREX_LANGUAGES_FOR_LANG_INDEX sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-URI_ATTRIBUTES sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-URI_ATTRIBUTES sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-MIME_TYPE sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-TREX_INDEX_MODE sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-SEMANTICS sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-LANGUAGE_ID_FIELD sy-vline 
WA_ESH_S_TREX_INDEX_META_DATA_STR-SEARCHABLE_FILE_FIELD sy-vline      INTO ld_text SEPARATED BY SPACE.

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