ABAP Select data from SAP table P01C_IEZW into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01C_IEZW 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 P01C_IEZW. 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 P01C_IEZW 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_P01C_IEZW TYPE STANDARD TABLE OF P01C_IEZW,
      WA_P01C_IEZW TYPE P01C_IEZW,
      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: <P01C_IEZW> TYPE P01C_IEZW.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01C_IEZW.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01C_IEZW
  INTO TABLE IT_P01C_IEZW.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01C_IEZW
*  INTO TABLE @DATA(IT_P01C_IEZW2).
*--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_P01C_IEZW INDEX 1 INTO DATA(WA_P01C_IEZW2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01C_IEZW ASSIGNING <P01C_IEZW>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01C_IEZW>-NOZWS = 1.
<P01C_IEZW>-ZWCHS = 1.
<P01C_IEZW>-ZWEMW = 1.
<P01C_IEZW>-ZWEUA = 1.
<P01C_IEZW>-ZWEVF = 1.

ENDLOOP.

LOOP AT IT_P01C_IEZW INTO WA_P01C_IEZW.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01C_IEZW-ZWALT, sy-vline,
  WA_P01C_IEZW-ZWAL2, sy-vline,
  WA_P01C_IEZW-MOZAN, sy-vline,
  WA_P01C_IEZW-MOZRA, sy-vline,
  WA_P01C_IEZW-MNTEL, sy-vline,
  WA_P01C_IEZW-ANSMN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01C_IEZW 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_P01C_IEZW 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_P01C_IEZW INTO WA_P01C_IEZW.


*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_P01C_IEZW_STR, 
NOZWS TYPE STRING,
ZWCHS TYPE STRING,
ZWEMW TYPE STRING,
ZWEUA TYPE STRING,
ZWEVF TYPE STRING,
ZWALT TYPE STRING,
ZWAL2 TYPE STRING,
MOZAN TYPE STRING,
MOZRA TYPE STRING,
MNTEL TYPE STRING,
ANSMN TYPE STRING,
RUNDM TYPE STRING,
RUNDN TYPE STRING,
KZZUW TYPE STRING,
KZZUZ TYPE STRING,
DTZUW TYPE STRING,
ANZMZ TYPE STRING,
ANZML TYPE STRING,
ZWMLE TYPE STRING,
KZDAR TYPE STRING,
ZWBDT TYPE STRING,
ZWEDT TYPE STRING,
ZWEND TYPE STRING,
ZWEJJ TYPE STRING,
ZWEJ2 TYPE STRING,
ZLGAR TYPE STRING,
ZLTRG TYPE STRING,
ZLTZV TYPE STRING,
KZNPA TYPE STRING,
DPRTY TYPE STRING,
DPRDJ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01C_IEZW_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_P01C_IEZW_STR-NOZWS sy-vline 
WA_P01C_IEZW_STR-ZWCHS sy-vline 
WA_P01C_IEZW_STR-ZWEMW sy-vline 
WA_P01C_IEZW_STR-ZWEUA sy-vline 
WA_P01C_IEZW_STR-ZWEVF sy-vline 
WA_P01C_IEZW_STR-ZWALT sy-vline 
WA_P01C_IEZW_STR-ZWAL2 sy-vline 
WA_P01C_IEZW_STR-MOZAN sy-vline 
WA_P01C_IEZW_STR-MOZRA sy-vline 
WA_P01C_IEZW_STR-MNTEL sy-vline 
WA_P01C_IEZW_STR-ANSMN sy-vline 
WA_P01C_IEZW_STR-RUNDM sy-vline 
WA_P01C_IEZW_STR-RUNDN sy-vline 
WA_P01C_IEZW_STR-KZZUW sy-vline 
WA_P01C_IEZW_STR-KZZUZ sy-vline 
WA_P01C_IEZW_STR-DTZUW sy-vline 
WA_P01C_IEZW_STR-ANZMZ sy-vline 
WA_P01C_IEZW_STR-ANZML sy-vline 
WA_P01C_IEZW_STR-ZWMLE sy-vline 
WA_P01C_IEZW_STR-KZDAR sy-vline 
WA_P01C_IEZW_STR-ZWBDT sy-vline 
WA_P01C_IEZW_STR-ZWEDT sy-vline 
WA_P01C_IEZW_STR-ZWEND sy-vline 
WA_P01C_IEZW_STR-ZWEJJ sy-vline 
WA_P01C_IEZW_STR-ZWEJ2 sy-vline 
WA_P01C_IEZW_STR-ZLGAR sy-vline 
WA_P01C_IEZW_STR-ZLTRG sy-vline 
WA_P01C_IEZW_STR-ZLTZV sy-vline 
WA_P01C_IEZW_STR-KZNPA sy-vline 
WA_P01C_IEZW_STR-DPRTY sy-vline 
WA_P01C_IEZW_STR-DPRDJ sy-vline      INTO ld_text SEPARATED BY SPACE.

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