ABAP Select data from SAP table KAZB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KAZB
*  INTO TABLE @DATA(IT_KAZB2).
*--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_KAZB INDEX 1 INTO DATA(WA_KAZB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KAZB>-AB_AUFNR = 1.
<KAZB>-BIS_AUFNR = 1.
<KAZB>-AUFGR = 1.
<KAZB>-KDAUF = 1.
<KAZB>-KDPOS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KAZB-KDAUF_BIS, sy-vline,
  WA_KAZB-KOKRS, sy-vline,
  WA_KAZB-WSDAT, sy-vline,
  WA_KAZB-VERSN, sy-vline,
  WA_KAZB-PERIODE, sy-vline,
  WA_KAZB-PERIOD_VON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KAZB 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_KAZB 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_KAZB INTO WA_KAZB.


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

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

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

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

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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_KAZB-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAZB-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR_VON
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_KAZB-GJAHR_VON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAZB-GJAHR_VON.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR_BIS
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_KAZB-GJAHR_BIS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAZB-GJAHR_BIS.
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_KAZB_STR, 
AB_AUFNR TYPE STRING,
BIS_AUFNR TYPE STRING,
AUFGR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KDAUF_BIS TYPE STRING,
KOKRS TYPE STRING,
WSDAT TYPE STRING,
VERSN TYPE STRING,
PERIODE TYPE STRING,
PERIOD_VON TYPE STRING,
PERIOD_BIS TYPE STRING,
GJAHR TYPE STRING,
GJAHR_VON TYPE STRING,
GJAHR_BIS TYPE STRING,
BATCH TYPE STRING,
RFC_GROUP TYPE STRING,
TESTLAUF TYPE STRING,
DIALOG TYPE STRING,
ISTZU TYPE STRING,
PLANZU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KAZB_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_KAZB_STR-AB_AUFNR sy-vline 
WA_KAZB_STR-BIS_AUFNR sy-vline 
WA_KAZB_STR-AUFGR sy-vline 
WA_KAZB_STR-KDAUF sy-vline 
WA_KAZB_STR-KDPOS sy-vline 
WA_KAZB_STR-KDAUF_BIS sy-vline 
WA_KAZB_STR-KOKRS sy-vline 
WA_KAZB_STR-WSDAT sy-vline 
WA_KAZB_STR-VERSN sy-vline 
WA_KAZB_STR-PERIODE sy-vline 
WA_KAZB_STR-PERIOD_VON sy-vline 
WA_KAZB_STR-PERIOD_BIS sy-vline 
WA_KAZB_STR-GJAHR sy-vline 
WA_KAZB_STR-GJAHR_VON sy-vline 
WA_KAZB_STR-GJAHR_BIS sy-vline 
WA_KAZB_STR-BATCH sy-vline 
WA_KAZB_STR-RFC_GROUP sy-vline 
WA_KAZB_STR-TESTLAUF sy-vline 
WA_KAZB_STR-DIALOG sy-vline 
WA_KAZB_STR-ISTZU sy-vline 
WA_KAZB_STR-PLANZU sy-vline      INTO ld_text SEPARATED BY SPACE.

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