ABAP Select data from SAP table ESH_S_ADM_PARAM_CACHE 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_ADM_PARAM_CACHE 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_ADM_PARAM_CACHE. 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_ADM_PARAM_CACHE 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_ADM_PARAM_CACHE TYPE STANDARD TABLE OF ESH_S_ADM_PARAM_CACHE,
      WA_ESH_S_ADM_PARAM_CACHE TYPE ESH_S_ADM_PARAM_CACHE,
      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_ADM_PARAM_CACHE> TYPE ESH_S_ADM_PARAM_CACHE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_S_ADM_PARAM_CACHE
*  INTO TABLE @DATA(IT_ESH_S_ADM_PARAM_CACHE2).
*--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_ADM_PARAM_CACHE INDEX 1 INTO DATA(WA_ESH_S_ADM_PARAM_CACHE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_S_ADM_PARAM_CACHE>-IS_CENTRAL = 1.
<ESH_S_ADM_PARAM_CACHE>-HUB_DESTINATION = 1.
<ESH_S_ADM_PARAM_CACHE>-HUB_DESTINATION_AUTH = 1.
<ESH_S_ADM_PARAM_CACHE>-MASTER_CLIENT = 1.
<ESH_S_ADM_PARAM_CACHE>-SEARCH_DELEGATION_ACTIVE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_S_ADM_PARAM_CACHE-TREX_RFCDEST, sy-vline,
  WA_ESH_S_ADM_PARAM_CACHE-TREX_VERSION, sy-vline,
  WA_ESH_S_ADM_PARAM_CACHE-TREX_VERSION_DATE, sy-vline,
  WA_ESH_S_ADM_PARAM_CACHE-IS_CLASSIC_SYSTEM, sy-vline,
  WA_ESH_S_ADM_PARAM_CACHE-IS_CLOUD_SYSTEM, sy-vline,
  WA_ESH_S_ADM_PARAM_CACHE-IS_CLOUD_PLATFORM_SYSTEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_S_ADM_PARAM_CACHE 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_ADM_PARAM_CACHE 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_ADM_PARAM_CACHE INTO WA_ESH_S_ADM_PARAM_CACHE.


*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_ADM_PARAM_CACHE_STR, 
IS_CENTRAL TYPE STRING,
HUB_DESTINATION TYPE STRING,
HUB_DESTINATION_AUTH TYPE STRING,
MASTER_CLIENT TYPE STRING,
SEARCH_DELEGATION_ACTIVE TYPE STRING,
TREX_RFCDEST TYPE STRING,
TREX_VERSION TYPE STRING,
TREX_VERSION_DATE TYPE STRING,
IS_CLASSIC_SYSTEM TYPE STRING,
IS_CLOUD_SYSTEM TYPE STRING,
IS_CLOUD_PLATFORM_SYSTEM TYPE STRING,
IS_CROSS_CLIENT_MODE TYPE STRING,
IS_CUSTOMER_SYSTEM TYPE STRING,
IS_AUTH_CHECK_ACTIVE TYPE STRING,
IS_ESHANA_API_ACTIVE TYPE STRING,
IS_NEWDB TYPE STRING,
IS_REMOTESEARCH_BACKEND TYPE STRING,
IS_REMOTESEARCH_PROXY TYPE STRING,
IS_SNAPSHOT_ACTIVE TYPE STRING,
SNAPSHOT_TIMESTAMP TYPE STRING,
RUBU_TECHNOLOGY TYPE STRING,
USE_DCL_RUNTIME TYPE STRING,
IS_LOW_MEMORY_MODE TYPE STRING,
IS_CR_IMPORT_REQUESTED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_S_ADM_PARAM_CACHE_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_ADM_PARAM_CACHE_STR-IS_CENTRAL sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-HUB_DESTINATION sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-HUB_DESTINATION_AUTH sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-MASTER_CLIENT sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-SEARCH_DELEGATION_ACTIVE sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-TREX_RFCDEST sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-TREX_VERSION sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-TREX_VERSION_DATE sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_CLASSIC_SYSTEM sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_CLOUD_SYSTEM sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_CLOUD_PLATFORM_SYSTEM sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_CROSS_CLIENT_MODE sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_CUSTOMER_SYSTEM sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_AUTH_CHECK_ACTIVE sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_ESHANA_API_ACTIVE sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_NEWDB sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_REMOTESEARCH_BACKEND sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_REMOTESEARCH_PROXY sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_SNAPSHOT_ACTIVE sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-SNAPSHOT_TIMESTAMP sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-RUBU_TECHNOLOGY sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-USE_DCL_RUNTIME sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_LOW_MEMORY_MODE sy-vline 
WA_ESH_S_ADM_PARAM_CACHE_STR-IS_CR_IMPORT_REQUESTED sy-vline      INTO ld_text SEPARATED BY SPACE.

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