ABAP Select data from SAP table PKZ1B into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PKZ1B 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 PKZ1B. 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 PKZ1B 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_PKZ1B TYPE STANDARD TABLE OF PKZ1B,
      WA_PKZ1B TYPE PKZ1B,
      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: <PKZ1B> TYPE PKZ1B.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PKZ1B.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PKZ1B
  INTO TABLE IT_PKZ1B.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKZ1B
*  INTO TABLE @DATA(IT_PKZ1B2).
*--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_PKZ1B INDEX 1 INTO DATA(WA_PKZ1B2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PKZ1B ASSIGNING <PKZ1B>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKZ1B>-GCATE = 1.
<PKZ1B>-GSTAT = 1.
<PKZ1B>-CRDID = 1.
<PKZ1B>-EMFTX = 1.
<PKZ1B>-BANKN = 1.

ENDLOOP.

LOOP AT IT_PKZ1B INTO WA_PKZ1B.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKZ1B-BANKL, sy-vline,
  WA_PKZ1B-BANKS, sy-vline,
  WA_PKZ1B-BKONT, sy-vline,
  WA_PKZ1B-BKREF, sy-vline,
  WA_PKZ1B-BKPLZ, sy-vline,
  WA_PKZ1B-BKORT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKZ1B 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_PKZ1B 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_PKZ1B INTO WA_PKZ1B.


*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_PKZ1B_STR, 
GCATE TYPE STRING,
GSTAT TYPE STRING,
CRDID TYPE STRING,
EMFTX TYPE STRING,
BANKN TYPE STRING,
BANKL TYPE STRING,
BANKS TYPE STRING,
BKONT TYPE STRING,
BKREF TYPE STRING,
BKPLZ TYPE STRING,
BKORT TYPE STRING,
STRAS TYPE STRING,
STATE TYPE STRING,
IBAN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKZ1B_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_PKZ1B_STR-GCATE sy-vline 
WA_PKZ1B_STR-GSTAT sy-vline 
WA_PKZ1B_STR-CRDID sy-vline 
WA_PKZ1B_STR-EMFTX sy-vline 
WA_PKZ1B_STR-BANKN sy-vline 
WA_PKZ1B_STR-BANKL sy-vline 
WA_PKZ1B_STR-BANKS sy-vline 
WA_PKZ1B_STR-BKONT sy-vline 
WA_PKZ1B_STR-BKREF sy-vline 
WA_PKZ1B_STR-BKPLZ sy-vline 
WA_PKZ1B_STR-BKORT sy-vline 
WA_PKZ1B_STR-STRAS sy-vline 
WA_PKZ1B_STR-STATE sy-vline 
WA_PKZ1B_STR-IBAN sy-vline      INTO ld_text SEPARATED BY SPACE.

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