ABAP Select data from SAP table /CFG/S_ENT_BUFFER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /CFG/S_ENT_BUFFER 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 /CFG/S_ENT_BUFFER. 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 /CFG/S_ENT_BUFFER 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_/CFG/S_ENT_BUFFER TYPE STANDARD TABLE OF /CFG/S_ENT_BUFFER,
      WA_/CFG/S_ENT_BUFFER TYPE /CFG/S_ENT_BUFFER,
      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: </CFG/S_ENT_BUFFER> TYPE /CFG/S_ENT_BUFFER.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /CFG/S_ENT_BUFFER
  INTO TABLE IT_/CFG/S_ENT_BUFFER.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /CFG/S_ENT_BUFFER
*  INTO TABLE @DATA(IT_/CFG/S_ENT_BUFFER2).
*--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_/CFG/S_ENT_BUFFER INDEX 1 INTO DATA(WA_/CFG/S_ENT_BUFFER2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/CFG/S_ENT_BUFFER ASSIGNING </CFG/S_ENT_BUFFER>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</CFG/S_ENT_BUFFER>-CFGE_ID = 1.
</CFG/S_ENT_BUFFER>-CTX_SPEC = 1.
</CFG/S_ENT_BUFFER>-VERSION = 1.
</CFG/S_ENT_BUFFER>-VERSION_STATE = 1.
</CFG/S_ENT_BUFFER>-MODIFIER = 1.

ENDLOOP.

LOOP AT IT_/CFG/S_ENT_BUFFER INTO WA_/CFG/S_ENT_BUFFER.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/CFG/S_ENT_BUFFER-TYPE, sy-vline,
  WA_/CFG/S_ENT_BUFFER-SUPER_TYPE, sy-vline,
  WA_/CFG/S_ENT_BUFFER-DEFINITION_DS, sy-vline,
  WA_/CFG/S_ENT_BUFFER-SUBSET_EXPR, sy-vline,
  WA_/CFG/S_ENT_BUFFER-APPL_AREA, sy-vline,
  WA_/CFG/S_ENT_BUFFER-SEMANTICS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/CFG/S_ENT_BUFFER 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_/CFG/S_ENT_BUFFER 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_/CFG/S_ENT_BUFFER INTO WA_/CFG/S_ENT_BUFFER.


*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 TSTLC, internal->external for field CREATED_AT
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/CFG/S_ENT_BUFFER-CREATED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CFG/S_ENT_BUFFER-CREATED_AT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field CHANGED_AT
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/CFG/S_ENT_BUFFER-CHANGED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CFG/S_ENT_BUFFER-CHANGED_AT.
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_/CFG/S_ENT_BUFFER_STR, 
CFGE_ID TYPE STRING,
CTX_SPEC TYPE STRING,
VERSION TYPE STRING,
VERSION_STATE TYPE STRING,
MODIFIER TYPE STRING,
TYPE TYPE STRING,
SUPER_TYPE TYPE STRING,
DEFINITION_DS TYPE STRING,
SUBSET_EXPR TYPE STRING,
APPL_AREA TYPE STRING,
SEMANTICS TYPE STRING,
MODEL TYPE STRING,
VISIBILITY TYPE STRING,
DISPLAY_ORDER TYPE STRING,
OBJECTNAME TYPE STRING,
OBJECTTYPE TYPE STRING,
OBJECT_PACKAGE TYPE STRING,
ENTITY_CONSTRAINT TYPE STRING,
ENTITY_USAGE TYPE STRING,
MAY_INSERT TYPE STRING,
MAY_DELETE TYPE STRING,
MAY_MODIFY TYPE STRING,
REQUIRE_TEMPLATE TYPE STRING,
DEFAULT_TEMPLATE TYPE STRING,
TRANSPORTABLE TYPE STRING,
MAINTENANCE_GRANT TYPE STRING,
REQUIRES_MANUAL_REWORK TYPE STRING,
MANUAL_EXECUTION TYPE STRING,
DIRECT_WRITE_ENABLED TYPE STRING,
GENERATION TYPE STRING,
VALIDATION TYPE STRING,
VETO_CHECK TYPE STRING,
ACTIVATION_ADAPTER TYPE STRING,
OBSERVER TYPE STRING,
DEVCLASS TYPE STRING,
DEF_OWNER TYPE STRING,
COMPLETION TYPE STRING,
FINGERPRINT TYPE STRING,
LOC_INTENT TYPE STRING,
REVIEW_INSERTION TYPE STRING,
REVIEW_KEYCHANGE TYPE STRING,
REVIEW_DELETION TYPE STRING,
REVIEW_MODIFICATIONS TYPE STRING,
MAY_CHANGE_KEY TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_AT TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_AT TYPE STRING,
BUFFER_STATE TYPE STRING,
BUFFER_MODE TYPE STRING,
RELEVANT TYPE STRING,
LOCAL TYPE STRING,
DEF_CONTEXT TYPE STRING,
DRAFT_EXISTS TYPE STRING,
METADATA TYPE STRING,
IS_SUB_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/CFG/S_ENT_BUFFER_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_/CFG/S_ENT_BUFFER_STR-CFGE_ID sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-CTX_SPEC sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-VERSION sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-VERSION_STATE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-MODIFIER sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-TYPE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-SUPER_TYPE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-DEFINITION_DS sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-SUBSET_EXPR sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-APPL_AREA sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-SEMANTICS sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-MODEL sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-VISIBILITY sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-DISPLAY_ORDER sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-OBJECTNAME sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-OBJECTTYPE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-OBJECT_PACKAGE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-ENTITY_CONSTRAINT sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-ENTITY_USAGE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-MAY_INSERT sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-MAY_DELETE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-MAY_MODIFY sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-REQUIRE_TEMPLATE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-DEFAULT_TEMPLATE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-TRANSPORTABLE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-MAINTENANCE_GRANT sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-REQUIRES_MANUAL_REWORK sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-MANUAL_EXECUTION sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-DIRECT_WRITE_ENABLED sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-GENERATION sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-VALIDATION sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-VETO_CHECK sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-ACTIVATION_ADAPTER sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-OBSERVER sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-DEVCLASS sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-DEF_OWNER sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-COMPLETION sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-FINGERPRINT sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-LOC_INTENT sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-REVIEW_INSERTION sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-REVIEW_KEYCHANGE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-REVIEW_DELETION sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-REVIEW_MODIFICATIONS sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-MAY_CHANGE_KEY sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-CREATED_BY sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-CREATED_AT sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-CHANGED_BY sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-CHANGED_AT sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-BUFFER_STATE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-BUFFER_MODE sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-RELEVANT sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-LOCAL sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-DEF_CONTEXT sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-DRAFT_EXISTS sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-METADATA sy-vline 
WA_/CFG/S_ENT_BUFFER_STR-IS_SUB_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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