ABAP Select data from SAP table PZI04 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PZI04 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 PZI04. 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 PZI04 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_PZI04 TYPE STANDARD TABLE OF PZI04,
      WA_PZI04 TYPE PZI04,
      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: <PZI04> TYPE PZI04.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PZI04.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PZI04
  INTO TABLE IT_PZI04.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PZI04
*  INTO TABLE @DATA(IT_PZI042).
*--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_PZI04 INDEX 1 INTO DATA(WA_PZI042).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PZI04 ASSIGNING <PZI04>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PZI04>-INFTY = 1.
<PZI04>-SUBTY = 1.
<PZI04>-OBJPS = 1.
<PZI04>-SEQNR = 1.
<PZI04>-ENDDA = 1.

ENDLOOP.

LOOP AT IT_PZI04 INTO WA_PZI04.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PZI04-BEGDA, sy-vline,
  WA_PZI04-VTKEN, sy-vline,
  WA_PZI04-BEGUZ, sy-vline,
  WA_PZI04-ENDUZ, sy-vline,
  WA_PZI04-AWART, sy-vline,
  WA_PZI04-ABWTG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PZI04 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_PZI04 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_PZI04 INTO WA_PZI04.


*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_PZI04_STR, 
INFTY TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
SEQNR TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
VTKEN TYPE STRING,
BEGUZ TYPE STRING,
ENDUZ TYPE STRING,
AWART TYPE STRING,
ABWTG TYPE STRING,
STDAZ TYPE STRING,
ABRST TYPE STRING,
ABRTG TYPE STRING,
LFZED TYPE STRING,
KRGED TYPE STRING,
AKIND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PZI04_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_PZI04_STR-INFTY sy-vline 
WA_PZI04_STR-SUBTY sy-vline 
WA_PZI04_STR-OBJPS sy-vline 
WA_PZI04_STR-SEQNR sy-vline 
WA_PZI04_STR-ENDDA sy-vline 
WA_PZI04_STR-BEGDA sy-vline 
WA_PZI04_STR-VTKEN sy-vline 
WA_PZI04_STR-BEGUZ sy-vline 
WA_PZI04_STR-ENDUZ sy-vline 
WA_PZI04_STR-AWART sy-vline 
WA_PZI04_STR-ABWTG sy-vline 
WA_PZI04_STR-STDAZ sy-vline 
WA_PZI04_STR-ABRST sy-vline 
WA_PZI04_STR-ABRTG sy-vline 
WA_PZI04_STR-LFZED sy-vline 
WA_PZI04_STR-KRGED sy-vline 
WA_PZI04_STR-AKIND sy-vline      INTO ld_text SEPARATED BY SPACE.

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