ABAP Select data from SAP table PCEC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCEC
*  INTO TABLE @DATA(IT_PCEC2).
*--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_PCEC INDEX 1 INTO DATA(WA_PCEC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCEC>-MANDT = 1.
<PCEC>-ZBUKR = 1.
<PCEC>-HBKID = 1.
<PCEC>-HKTID = 1.
<PCEC>-STAPL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCEC-CHECF, sy-vline,
  WA_PCEC-CHECT, sy-vline,
  WA_PCEC-FSTAP, sy-vline,
  WA_PCEC-CHECL, sy-vline,
  WA_PCEC-STAPI, sy-vline,
  WA_PCEC-XARCP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCEC 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_PCEC 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_PCEC INTO WA_PCEC.


*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_PCEC_STR, 
MANDT TYPE STRING,
ZBUKR TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
STAPL TYPE STRING,
CHECF TYPE STRING,
CHECT TYPE STRING,
FSTAP TYPE STRING,
CHECL TYPE STRING,
STAPI TYPE STRING,
XARCP TYPE STRING,
XARCT TYPE STRING,
XCHCH TYPE STRING,
PURDT TYPE STRING,
DUMMY_CHKBOOKMNG_INCL_EEW_PS TYPE STRING,
ZWELS TYPE STRING,
MINIALERTNUM TYPE STRING,
PURCHASEBY TYPE STRING,
CREATEBY TYPE STRING,
CREATEDATE TYPE STRING,
CREATETIME TYPE STRING,
CHECKTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCEC_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_PCEC_STR-MANDT sy-vline 
WA_PCEC_STR-ZBUKR sy-vline 
WA_PCEC_STR-HBKID sy-vline 
WA_PCEC_STR-HKTID sy-vline 
WA_PCEC_STR-STAPL sy-vline 
WA_PCEC_STR-CHECF sy-vline 
WA_PCEC_STR-CHECT sy-vline 
WA_PCEC_STR-FSTAP sy-vline 
WA_PCEC_STR-CHECL sy-vline 
WA_PCEC_STR-STAPI sy-vline 
WA_PCEC_STR-XARCP sy-vline 
WA_PCEC_STR-XARCT sy-vline 
WA_PCEC_STR-XCHCH sy-vline 
WA_PCEC_STR-PURDT sy-vline 
WA_PCEC_STR-DUMMY_CHKBOOKMNG_INCL_EEW_PS sy-vline 
WA_PCEC_STR-ZWELS sy-vline 
WA_PCEC_STR-MINIALERTNUM sy-vline 
WA_PCEC_STR-PURCHASEBY sy-vline 
WA_PCEC_STR-CREATEBY sy-vline 
WA_PCEC_STR-CREATEDATE sy-vline 
WA_PCEC_STR-CREATETIME sy-vline 
WA_PCEC_STR-CHECKTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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