ABAP Select data from SAP table PC29U into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC29U 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 PC29U. 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 PC29U 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_PC29U TYPE STANDARD TABLE OF PC29U,
      WA_PC29U TYPE PC29U,
      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: <PC29U> TYPE PC29U.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC29U.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC29U
  INTO TABLE IT_PC29U.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC29U
*  INTO TABLE @DATA(IT_PC29U2).
*--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_PC29U INDEX 1 INTO DATA(WA_PC29U2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC29U ASSIGNING <PC29U>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC29U>-CNTR1 = 1.
<PC29U>-ENDDA = 1.
<PC29U>-BEGDA = 1.
<PC29U>-CONTP = 1.
<PC29U>-EEMPR = 1.

ENDLOOP.

LOOP AT IT_PC29U INTO WA_PC29U.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC29U-EENPR, sy-vline,
  WA_PC29U-ERMPR, sy-vline,
  WA_PC29U-ERNPR, sy-vline,
  WA_PC29U-INCRG, sy-vline,
  WA_PC29U-OPCON, sy-vline,
  WA_PC29U-EEFPC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC29U 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_PC29U 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_PC29U INTO WA_PC29U.


*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_PC29U_STR, 
CNTR1 TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
CONTP TYPE STRING,
EEMPR TYPE STRING,
EENPR TYPE STRING,
ERMPR TYPE STRING,
ERNPR TYPE STRING,
INCRG TYPE STRING,
OPCON TYPE STRING,
EEFPC TYPE STRING,
EEEPC TYPE STRING,
EEFAM TYPE STRING,
WAEFA TYPE STRING,
EEEAM TYPE STRING,
WAEEA TYPE STRING,
ERFPC TYPE STRING,
EREPC TYPE STRING,
ERFAM TYPE STRING,
WARFA TYPE STRING,
EREAM TYPE STRING,
WAREA TYPE STRING,
EEMWT TYPE STRING,
EENWT TYPE STRING,
ERMWT TYPE STRING,
ERNWT TYPE STRING,
SALWT TYPE STRING,
SCALC TYPE STRING,
CUMTY TYPE STRING,
MNINC TYPE STRING,
MNCRY TYPE STRING,
MXINC TYPE STRING,
MXCRY TYPE STRING,
MNAGE TYPE STRING,
MXAGE TYPE STRING,
EEACM TYPE STRING,
ERACM TYPE STRING,
EEACC TYPE STRING,
ERACC TYPE STRING,
SCRYY TYPE STRING,
SCRMM TYPE STRING,
SCRDD TYPE STRING,
EEAGE TYPE STRING,
PRVER TYPE STRING,
PLSTA TYPE STRING,
CUMCM TYPE STRING,
PRECB TYPE STRING,
CMTHD TYPE STRING,
MNIND TYPE STRING,
MNDCR TYPE STRING,
MXIND TYPE STRING,
MXDCR TYPE STRING,
PRVCA TYPE STRING,
PREMP TYPE STRING,
VCAMA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC29U_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_PC29U_STR-CNTR1 sy-vline 
WA_PC29U_STR-ENDDA sy-vline 
WA_PC29U_STR-BEGDA sy-vline 
WA_PC29U_STR-CONTP sy-vline 
WA_PC29U_STR-EEMPR sy-vline 
WA_PC29U_STR-EENPR sy-vline 
WA_PC29U_STR-ERMPR sy-vline 
WA_PC29U_STR-ERNPR sy-vline 
WA_PC29U_STR-INCRG sy-vline 
WA_PC29U_STR-OPCON sy-vline 
WA_PC29U_STR-EEFPC sy-vline 
WA_PC29U_STR-EEEPC sy-vline 
WA_PC29U_STR-EEFAM sy-vline 
WA_PC29U_STR-WAEFA sy-vline 
WA_PC29U_STR-EEEAM sy-vline 
WA_PC29U_STR-WAEEA sy-vline 
WA_PC29U_STR-ERFPC sy-vline 
WA_PC29U_STR-EREPC sy-vline 
WA_PC29U_STR-ERFAM sy-vline 
WA_PC29U_STR-WARFA sy-vline 
WA_PC29U_STR-EREAM sy-vline 
WA_PC29U_STR-WAREA sy-vline 
WA_PC29U_STR-EEMWT sy-vline 
WA_PC29U_STR-EENWT sy-vline 
WA_PC29U_STR-ERMWT sy-vline 
WA_PC29U_STR-ERNWT sy-vline 
WA_PC29U_STR-SALWT sy-vline 
WA_PC29U_STR-SCALC sy-vline 
WA_PC29U_STR-CUMTY sy-vline 
WA_PC29U_STR-MNINC sy-vline 
WA_PC29U_STR-MNCRY sy-vline 
WA_PC29U_STR-MXINC sy-vline 
WA_PC29U_STR-MXCRY sy-vline 
WA_PC29U_STR-MNAGE sy-vline 
WA_PC29U_STR-MXAGE sy-vline 
WA_PC29U_STR-EEACM sy-vline 
WA_PC29U_STR-ERACM sy-vline 
WA_PC29U_STR-EEACC sy-vline 
WA_PC29U_STR-ERACC sy-vline 
WA_PC29U_STR-SCRYY sy-vline 
WA_PC29U_STR-SCRMM sy-vline 
WA_PC29U_STR-SCRDD sy-vline 
WA_PC29U_STR-EEAGE sy-vline 
WA_PC29U_STR-PRVER sy-vline 
WA_PC29U_STR-PLSTA sy-vline 
WA_PC29U_STR-CUMCM sy-vline 
WA_PC29U_STR-PRECB sy-vline 
WA_PC29U_STR-CMTHD sy-vline 
WA_PC29U_STR-MNIND sy-vline 
WA_PC29U_STR-MNDCR sy-vline 
WA_PC29U_STR-MXIND sy-vline 
WA_PC29U_STR-MXDCR sy-vline 
WA_PC29U_STR-PRVCA sy-vline 
WA_PC29U_STR-PREMP sy-vline 
WA_PC29U_STR-VCAMA sy-vline      INTO ld_text SEPARATED BY SPACE.

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