ABAP Select data from SAP table ESH_S_CON_BUFFER_HANA 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_CON_BUFFER_HANA 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_CON_BUFFER_HANA. 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_CON_BUFFER_HANA 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_CON_BUFFER_HANA TYPE STANDARD TABLE OF ESH_S_CON_BUFFER_HANA,
      WA_ESH_S_CON_BUFFER_HANA TYPE ESH_S_CON_BUFFER_HANA,
      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_CON_BUFFER_HANA> TYPE ESH_S_CON_BUFFER_HANA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_S_CON_BUFFER_HANA
*  INTO TABLE @DATA(IT_ESH_S_CON_BUFFER_HANA2).
*--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_CON_BUFFER_HANA INDEX 1 INTO DATA(WA_ESH_S_CON_BUFFER_HANA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_S_CON_BUFFER_HANA>-DESTINATION = 1.
<ESH_S_CON_BUFFER_HANA>-CO_TYPE = 1.
<ESH_S_CON_BUFFER_HANA>-CONNECTION_GUID = 1.
<ESH_S_CON_BUFFER_HANA>-HDB_CONNECTION = 1.
<ESH_S_CON_BUFFER_HANA>-HDB_DBSCHEMA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_S_CON_BUFFER_HANA-HANA_HTTP_USR_FIX, sy-vline,
  WA_ESH_S_CON_BUFFER_HANA-HOST, sy-vline,
  WA_ESH_S_CON_BUFFER_HANA-PORT, sy-vline,
  WA_ESH_S_CON_BUFFER_HANA-PROTOCOL, sy-vline,
  WA_ESH_S_CON_BUFFER_HANA-LANGUAGE, sy-vline,
  WA_ESH_S_CON_BUFFER_HANA-DESCRIPTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_S_CON_BUFFER_HANA 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_CON_BUFFER_HANA 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_CON_BUFFER_HANA INTO WA_ESH_S_CON_BUFFER_HANA.


*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 ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_S_CON_BUFFER_HANA-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_S_CON_BUFFER_HANA-LANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_S_CON_BUFFER_HANA-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_S_CON_BUFFER_HANA-LOGSYS.
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_S_CON_BUFFER_HANA_STR, 
DESTINATION TYPE STRING,
CO_TYPE TYPE STRING,
CONNECTION_GUID TYPE STRING,
HDB_CONNECTION TYPE STRING,
HDB_DBSCHEMA TYPE STRING,
HANA_HTTP_USR_FIX TYPE STRING,
HOST TYPE STRING,
PORT TYPE STRING,
PROTOCOL TYPE STRING,
LANGUAGE TYPE STRING,
DESCRIPTION TYPE STRING,
LOGSYS TYPE STRING,
USERNAME TYPE STRING,
PASSWORD TYPE STRING,
VIEWS TYPE STRING,
SYSTEM_USAGE TYPE STRING,
CONNECTION_READONLY TYPE STRING,
PRODVERS TYPE STRING,
CONNECTOR_STATUS TYPE STRING,
CONNECTION_SELECTABLE TYPE STRING,
UPDATE_FLAG TYPE STRING,
TEMPLATES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_S_CON_BUFFER_HANA_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_CON_BUFFER_HANA_STR-DESTINATION sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-CO_TYPE sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-CONNECTION_GUID sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-HDB_CONNECTION sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-HDB_DBSCHEMA sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-HANA_HTTP_USR_FIX sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-HOST sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-PORT sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-PROTOCOL sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-LANGUAGE sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-DESCRIPTION sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-LOGSYS sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-USERNAME sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-PASSWORD sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-VIEWS sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-SYSTEM_USAGE sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-CONNECTION_READONLY sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-PRODVERS sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-CONNECTOR_STATUS sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-CONNECTION_SELECTABLE sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-UPDATE_FLAG sy-vline 
WA_ESH_S_CON_BUFFER_HANA_STR-TEMPLATES sy-vline      INTO ld_text SEPARATED BY SPACE.

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