ABAP Select data from SAP table KGALCS_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KGALCS_S
*  INTO TABLE @DATA(IT_KGALCS_S2).
*--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_KGALCS_S INDEX 1 INTO DATA(WA_KGALCS_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KGALCS_S>-TAB = 1.
<KGALCS_S>-CYCLE = 1.
<KGALCS_S>-SDATE = 1.
<KGALCS_S>-EDATE = 1.
<KGALCS_S>-RSTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KGALCS_S-FREQ, sy-vline,
  WA_KGALCS_S-CRDATE, sy-vline,
  WA_KGALCS_S-PUSER, sy-vline,
  WA_KGALCS_S-MODDATE, sy-vline,
  WA_KGALCS_S-MODUSER, sy-vline,
  WA_KGALCS_S-LASTEXEC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KGALCS_S 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_KGALCS_S 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_KGALCS_S INTO WA_KGALCS_S.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_KGALCS_S_STR, 
TAB TYPE STRING,
CYCLE TYPE STRING,
SDATE TYPE STRING,
EDATE TYPE STRING,
RSTATUS TYPE STRING,
FREQ TYPE STRING,
CRDATE TYPE STRING,
PUSER TYPE STRING,
MODDATE TYPE STRING,
MODUSER TYPE STRING,
LASTEXEC TYPE STRING,
LEXECBY TYPE STRING,
TIMEEXEC TYPE STRING,
ITERFLAG TYPE STRING,
ASTATUS TYPE STRING,
CYCLESET TYPE STRING,
NEGTEST TYPE STRING,
TXT TYPE STRING,
MODIFIED TYPE STRING,
NEW TYPE STRING,
MAX_SEQNR TYPE STRING,
MAX_SEQPOS TYPE STRING,
ALART TYPE STRING,
IPKNZ TYPE STRING,
JOB TYPE STRING,
KUMUFLAG TYPE STRING,
XXKUMUFLAG TYPE STRING,
RCKUMUFLAG TYPE STRING,
NO_SRC_CE TYPE STRING,
SEGMENTS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KGALCS_S_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_KGALCS_S_STR-TAB sy-vline 
WA_KGALCS_S_STR-CYCLE sy-vline 
WA_KGALCS_S_STR-SDATE sy-vline 
WA_KGALCS_S_STR-EDATE sy-vline 
WA_KGALCS_S_STR-RSTATUS sy-vline 
WA_KGALCS_S_STR-FREQ sy-vline 
WA_KGALCS_S_STR-CRDATE sy-vline 
WA_KGALCS_S_STR-PUSER sy-vline 
WA_KGALCS_S_STR-MODDATE sy-vline 
WA_KGALCS_S_STR-MODUSER sy-vline 
WA_KGALCS_S_STR-LASTEXEC sy-vline 
WA_KGALCS_S_STR-LEXECBY sy-vline 
WA_KGALCS_S_STR-TIMEEXEC sy-vline 
WA_KGALCS_S_STR-ITERFLAG sy-vline 
WA_KGALCS_S_STR-ASTATUS sy-vline 
WA_KGALCS_S_STR-CYCLESET sy-vline 
WA_KGALCS_S_STR-NEGTEST sy-vline 
WA_KGALCS_S_STR-TXT sy-vline 
WA_KGALCS_S_STR-MODIFIED sy-vline 
WA_KGALCS_S_STR-NEW sy-vline 
WA_KGALCS_S_STR-MAX_SEQNR sy-vline 
WA_KGALCS_S_STR-MAX_SEQPOS sy-vline 
WA_KGALCS_S_STR-ALART sy-vline 
WA_KGALCS_S_STR-IPKNZ sy-vline 
WA_KGALCS_S_STR-JOB sy-vline 
WA_KGALCS_S_STR-KUMUFLAG sy-vline 
WA_KGALCS_S_STR-XXKUMUFLAG sy-vline 
WA_KGALCS_S_STR-RCKUMUFLAG sy-vline 
WA_KGALCS_S_STR-NO_SRC_CE sy-vline 
WA_KGALCS_S_STR-SEGMENTS sy-vline      INTO ld_text SEPARATED BY SPACE.

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