ABAP Select data from SAP table CSL_PREOEQ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CSL_PREOEQ
*  INTO TABLE @DATA(IT_CSL_PREOEQ2).
*--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_CSL_PREOEQ INDEX 1 INTO DATA(WA_CSL_PREOEQ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CSL_PREOEQ>-IPEOLS = 1.
<CSL_PREOEQ>-IPEODD = 1.
<CSL_PREOEQ>-IPEOARGS = 1.
<CSL_PREOEQ>-IPMI = 1.
<CSL_PREOEQ>-IPAC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CSL_PREOEQ-IPSC, sy-vline,
  WA_CSL_PREOEQ-IPWT, sy-vline,
  WA_CSL_PREOEQ-IPCOLL, sy-vline,
  WA_CSL_PREOEQ-IPEOCOLS, sy-vline,
  WA_CSL_PREOEQ-IPEOCOUS, sy-vline,
  WA_CSL_PREOEQ-SUBRC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CSL_PREOEQ 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_CSL_PREOEQ 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_CSL_PREOEQ INTO WA_CSL_PREOEQ.


*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 IPEOLS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CSL_PREOEQ-IPEOLS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSL_PREOEQ-IPEOLS.
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_CSL_PREOEQ_STR, 
IPEOLS TYPE STRING,
IPEODD TYPE STRING,
IPEOARGS TYPE STRING,
IPMI TYPE STRING,
IPAC TYPE STRING,
IPSC TYPE STRING,
IPWT TYPE STRING,
IPCOLL TYPE STRING,
IPEOCOLS TYPE STRING,
IPEOCOUS TYPE STRING,
SUBRC TYPE STRING,
MSGID TYPE STRING,
MSGTY TYPE STRING,
MSGNO TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CSL_PREOEQ_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_CSL_PREOEQ_STR-IPEOLS sy-vline 
WA_CSL_PREOEQ_STR-IPEODD sy-vline 
WA_CSL_PREOEQ_STR-IPEOARGS sy-vline 
WA_CSL_PREOEQ_STR-IPMI sy-vline 
WA_CSL_PREOEQ_STR-IPAC sy-vline 
WA_CSL_PREOEQ_STR-IPSC sy-vline 
WA_CSL_PREOEQ_STR-IPWT sy-vline 
WA_CSL_PREOEQ_STR-IPCOLL sy-vline 
WA_CSL_PREOEQ_STR-IPEOCOLS sy-vline 
WA_CSL_PREOEQ_STR-IPEOCOUS sy-vline 
WA_CSL_PREOEQ_STR-SUBRC sy-vline 
WA_CSL_PREOEQ_STR-MSGID sy-vline 
WA_CSL_PREOEQ_STR-MSGTY sy-vline 
WA_CSL_PREOEQ_STR-MSGNO sy-vline 
WA_CSL_PREOEQ_STR-MSGV1 sy-vline 
WA_CSL_PREOEQ_STR-MSGV2 sy-vline 
WA_CSL_PREOEQ_STR-MSGV3 sy-vline 
WA_CSL_PREOEQ_STR-MSGV4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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