ABAP Select data from SAP table CACS_S_BUFFERLOG1100 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CACS_S_BUFFERLOG1100 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 CACS_S_BUFFERLOG1100. 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 CACS_S_BUFFERLOG1100 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_CACS_S_BUFFERLOG1100 TYPE STANDARD TABLE OF CACS_S_BUFFERLOG1100,
      WA_CACS_S_BUFFERLOG1100 TYPE CACS_S_BUFFERLOG1100,
      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: <CACS_S_BUFFERLOG1100> TYPE CACS_S_BUFFERLOG1100.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CACS_S_BUFFERLOG1100.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CACS_S_BUFFERLOG1100
  INTO TABLE IT_CACS_S_BUFFERLOG1100.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CACS_S_BUFFERLOG1100
*  INTO TABLE @DATA(IT_CACS_S_BUFFERLOG11002).
*--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_CACS_S_BUFFERLOG1100 INDEX 1 INTO DATA(WA_CACS_S_BUFFERLOG11002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CACS_S_BUFFERLOG1100 ASSIGNING <CACS_S_BUFFERLOG1100>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CACS_S_BUFFERLOG1100>-APPL = 1.
<CACS_S_BUFFERLOG1100>-APPLNAME = 1.
<CACS_S_BUFFERLOG1100>-OBJTYPE = 1.
<CACS_S_BUFFERLOG1100>-OBJTYPETO = 1.
<CACS_S_BUFFERLOG1100>-BUFFER_ID = 1.

ENDLOOP.

LOOP AT IT_CACS_S_BUFFERLOG1100 INTO WA_CACS_S_BUFFERLOG1100.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CACS_S_BUFFERLOG1100-BUFFER_IDTO, sy-vline,
  WA_CACS_S_BUFFERLOG1100-TIMESTAMP, sy-vline,
  WA_CACS_S_BUFFERLOG1100-TIMESTAMPTO, sy-vline,
  WA_CACS_S_BUFFERLOG1100-FILTER, sy-vline,
  WA_CACS_S_BUFFERLOG1100-OK_CODE, sy-vline,
  WA_CACS_S_BUFFERLOG1100-BUFFER_IDH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CACS_S_BUFFERLOG1100 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_CACS_S_BUFFERLOG1100 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_CACS_S_BUFFERLOG1100 INTO WA_CACS_S_BUFFERLOG1100.


*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 ALPHA, internal->external for field BUFFER_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CACS_S_BUFFERLOG1100-BUFFER_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_S_BUFFERLOG1100-BUFFER_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BUFFER_IDTO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CACS_S_BUFFERLOG1100-BUFFER_IDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_S_BUFFERLOG1100-BUFFER_IDTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field TIMESTAMP
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CACS_S_BUFFERLOG1100-TIMESTAMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_S_BUFFERLOG1100-TIMESTAMP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field TIMESTAMPTO
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CACS_S_BUFFERLOG1100-TIMESTAMPTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_S_BUFFERLOG1100-TIMESTAMPTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BUFFER_IDH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CACS_S_BUFFERLOG1100-BUFFER_IDH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_S_BUFFERLOG1100-BUFFER_IDH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field TIMESTAMPH
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CACS_S_BUFFERLOG1100-TIMESTAMPH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_S_BUFFERLOG1100-TIMESTAMPH.
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_CACS_S_BUFFERLOG1100_STR, 
APPL TYPE STRING,
APPLNAME TYPE STRING,
OBJTYPE TYPE STRING,
OBJTYPETO TYPE STRING,
BUFFER_ID TYPE STRING,
BUFFER_IDTO TYPE STRING,
TIMESTAMP TYPE STRING,
TIMESTAMPTO TYPE STRING,
FILTER TYPE STRING,
OK_CODE TYPE STRING,
BUFFER_IDH TYPE STRING,
OBJTYPEH TYPE STRING,
TIMESTAMPH TYPE STRING,
PROGNAME TYPE STRING,
DYNNR TYPE STRING,
FIRSTSC02 TYPE STRING,
FIRSTSC01 TYPE STRING,
DATS TYPE STRING,
VERSION TYPE STRING,
DYNVERSION TYPE STRING,
VERSIONH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CACS_S_BUFFERLOG1100_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_CACS_S_BUFFERLOG1100_STR-APPL sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-APPLNAME sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-OBJTYPE sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-OBJTYPETO sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-BUFFER_ID sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-BUFFER_IDTO sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-TIMESTAMP sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-TIMESTAMPTO sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-FILTER sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-OK_CODE sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-BUFFER_IDH sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-OBJTYPEH sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-TIMESTAMPH sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-PROGNAME sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-DYNNR sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-FIRSTSC02 sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-FIRSTSC01 sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-DATS sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-VERSION sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-DYNVERSION sy-vline 
WA_CACS_S_BUFFERLOG1100_STR-VERSIONH sy-vline      INTO ld_text SEPARATED BY SPACE.

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