ABAP Select data from SAP table KGALS_O into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KGALS_O
*  INTO TABLE @DATA(IT_KGALS_O2).
*--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_KGALS_O INDEX 1 INTO DATA(WA_KGALS_O2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KGALS_O>-SEQNR = 1.
<KGALS_O>-NAME = 1.
<KGALS_O>-SEQPOS = 1.
<KGALS_O>-TXT = 1.
<KGALS_O>-SRULE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KGALS_O-RRULE, sy-vline,
  WA_KGALS_O-ACTIVE, sy-vline,
  WA_KGALS_O-NEGTEST, sy-vline,
  WA_KGALS_O-SCSET, sy-vline,
  WA_KGALS_O-SSET, sy-vline,
  WA_KGALS_O-RSET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KGALS_O 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_KGALS_O 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_KGALS_O INTO WA_KGALS_O.


*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 ASACC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KGALS_O-ASACC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KGALS_O-ASACC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ERSCH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KGALS_O-ERSCH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KGALS_O-ERSCH.
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_KGALS_O_STR, 
SEQNR TYPE STRING,
NAME TYPE STRING,
SEQPOS TYPE STRING,
TXT TYPE STRING,
SRULE TYPE STRING,
RRULE TYPE STRING,
ACTIVE TYPE STRING,
NEGTEST TYPE STRING,
SCSET TYPE STRING,
SSET TYPE STRING,
RSET TYPE STRING,
RCSET TYPE STRING,
SPERCENT TYPE STRING,
FACURR TYPE STRING,
SCIP TYPE STRING,
RCDATA TYPE STRING,
ASACC TYPE STRING,
PAFLDF TYPE STRING,
PAFLDG TYPE STRING,
PATXTF TYPE STRING,
PATXTG TYPE STRING,
SCIST TYPE STRING,
SCPLAN TYPE STRING,
SRULE_RLV TYPE STRING,
RRULE_RLV TYPE STRING,
SDVAL_DET TYPE STRING,
SORTFIELD TYPE STRING,
SENDER_NOT TYPE STRING,
MRULE TYPE STRING,
ABSCH TYPE STRING,
ERSCH TYPE STRING,
SWEIGHT_FACT TYPE STRING,
RWEIGHT_FACT TYPE STRING,
SENDER TYPE STRING,
RECEIVER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KGALS_O_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_KGALS_O_STR-SEQNR sy-vline 
WA_KGALS_O_STR-NAME sy-vline 
WA_KGALS_O_STR-SEQPOS sy-vline 
WA_KGALS_O_STR-TXT sy-vline 
WA_KGALS_O_STR-SRULE sy-vline 
WA_KGALS_O_STR-RRULE sy-vline 
WA_KGALS_O_STR-ACTIVE sy-vline 
WA_KGALS_O_STR-NEGTEST sy-vline 
WA_KGALS_O_STR-SCSET sy-vline 
WA_KGALS_O_STR-SSET sy-vline 
WA_KGALS_O_STR-RSET sy-vline 
WA_KGALS_O_STR-RCSET sy-vline 
WA_KGALS_O_STR-SPERCENT sy-vline 
WA_KGALS_O_STR-FACURR sy-vline 
WA_KGALS_O_STR-SCIP sy-vline 
WA_KGALS_O_STR-RCDATA sy-vline 
WA_KGALS_O_STR-ASACC sy-vline 
WA_KGALS_O_STR-PAFLDF sy-vline 
WA_KGALS_O_STR-PAFLDG sy-vline 
WA_KGALS_O_STR-PATXTF sy-vline 
WA_KGALS_O_STR-PATXTG sy-vline 
WA_KGALS_O_STR-SCIST sy-vline 
WA_KGALS_O_STR-SCPLAN sy-vline 
WA_KGALS_O_STR-SRULE_RLV sy-vline 
WA_KGALS_O_STR-RRULE_RLV sy-vline 
WA_KGALS_O_STR-SDVAL_DET sy-vline 
WA_KGALS_O_STR-SORTFIELD sy-vline 
WA_KGALS_O_STR-SENDER_NOT sy-vline 
WA_KGALS_O_STR-MRULE sy-vline 
WA_KGALS_O_STR-ABSCH sy-vline 
WA_KGALS_O_STR-ERSCH sy-vline 
WA_KGALS_O_STR-SWEIGHT_FACT sy-vline 
WA_KGALS_O_STR-RWEIGHT_FACT sy-vline 
WA_KGALS_O_STR-SENDER sy-vline 
WA_KGALS_O_STR-RECEIVER sy-vline      INTO ld_text SEPARATED BY SPACE.

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