ABAP Select data from SAP table PC2WUA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC2WUA 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 PC2WUA. 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 PC2WUA 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_PC2WUA TYPE STANDARD TABLE OF PC2WUA,
      WA_PC2WUA TYPE PC2WUA,
      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: <PC2WUA> TYPE PC2WUA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC2WUA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC2WUA
  INTO TABLE IT_PC2WUA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC2WUA
*  INTO TABLE @DATA(IT_PC2WUA2).
*--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_PC2WUA INDEX 1 INTO DATA(WA_PC2WUA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC2WUA ASSIGNING <PC2WUA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC2WUA>-MANDT = 1.
<PC2WUA>-PERNR = 1.
<PC2WUA>-HANSP = 1.
<PC2WUA>-AANSP = 1.
<PC2WUA>-SEQNO = 1.

ENDLOOP.

LOOP AT IT_PC2WUA INTO WA_PC2WUA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC2WUA-ENDDA, sy-vline,
  WA_PC2WUA-BEGDA, sy-vline,
  WA_PC2WUA-MODBV, sy-vline,
  WA_PC2WUA-ANGRP, sy-vline,
  WA_PC2WUA-LURSP, sy-vline,
  WA_PC2WUA-LTRGR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC2WUA 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_PC2WUA 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_PC2WUA INTO WA_PC2WUA.


*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_PC2WUA_STR, 
MANDT TYPE STRING,
PERNR TYPE STRING,
HANSP TYPE STRING,
AANSP TYPE STRING,
SEQNO TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
MODBV TYPE STRING,
ANGRP TYPE STRING,
LURSP TYPE STRING,
LTRGR TYPE STRING,
LGART TYPE STRING,
RENTE TYPE STRING,
RTBFI TYPE STRING,
RTBZW TYPE STRING,
RTZUW TYPE STRING,
ANZML TYPE STRING,
WAERS TYPE STRING,
MITST TYPE STRING,
STAUA TYPE STRING,
DATUA TYPE STRING,
ZFAKM TYPE STRING,
ZFAKN TYPE STRING,
ZFAMN TYPE STRING,
EINDT TYPE STRING,
FEALT TYPE STRING,
RNTOR TYPE STRING,
ZNRUA TYPE STRING,
REKLA TYPE STRING,
FEALM TYPE STRING,
RESVF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC2WUA_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_PC2WUA_STR-MANDT sy-vline 
WA_PC2WUA_STR-PERNR sy-vline 
WA_PC2WUA_STR-HANSP sy-vline 
WA_PC2WUA_STR-AANSP sy-vline 
WA_PC2WUA_STR-SEQNO sy-vline 
WA_PC2WUA_STR-ENDDA sy-vline 
WA_PC2WUA_STR-BEGDA sy-vline 
WA_PC2WUA_STR-MODBV sy-vline 
WA_PC2WUA_STR-ANGRP sy-vline 
WA_PC2WUA_STR-LURSP sy-vline 
WA_PC2WUA_STR-LTRGR sy-vline 
WA_PC2WUA_STR-LGART sy-vline 
WA_PC2WUA_STR-RENTE sy-vline 
WA_PC2WUA_STR-RTBFI sy-vline 
WA_PC2WUA_STR-RTBZW sy-vline 
WA_PC2WUA_STR-RTZUW sy-vline 
WA_PC2WUA_STR-ANZML sy-vline 
WA_PC2WUA_STR-WAERS sy-vline 
WA_PC2WUA_STR-MITST sy-vline 
WA_PC2WUA_STR-STAUA sy-vline 
WA_PC2WUA_STR-DATUA sy-vline 
WA_PC2WUA_STR-ZFAKM sy-vline 
WA_PC2WUA_STR-ZFAKN sy-vline 
WA_PC2WUA_STR-ZFAMN sy-vline 
WA_PC2WUA_STR-EINDT sy-vline 
WA_PC2WUA_STR-FEALT sy-vline 
WA_PC2WUA_STR-RNTOR sy-vline 
WA_PC2WUA_STR-ZNRUA sy-vline 
WA_PC2WUA_STR-REKLA sy-vline 
WA_PC2WUA_STR-FEALM sy-vline 
WA_PC2WUA_STR-RESVF sy-vline      INTO ld_text SEPARATED BY SPACE.

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