ABAP Select data from SAP table PC2BL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC2BL 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 PC2BL. 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 PC2BL 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_PC2BL TYPE STANDARD TABLE OF PC2BL,
      WA_PC2BL TYPE PC2BL,
      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: <PC2BL> TYPE PC2BL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC2BL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC2BL
  INTO TABLE IT_PC2BL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC2BL
*  INTO TABLE @DATA(IT_PC2BL2).
*--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_PC2BL INDEX 1 INTO DATA(WA_PC2BL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC2BL ASSIGNING <PC2BL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC2BL>-GDATE = 1.
<PC2BL>-QTYPE = 1.
<PC2BL>-ACCOP = 1.
<PC2BL>-LVPER = 1.
<PC2BL>-LFREQ = 1.

ENDLOOP.

LOOP AT IT_PC2BL INTO WA_PC2BL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC2BL-LVDAT, sy-vline,
  WA_PC2BL-LVNUM, sy-vline,
  WA_PC2BL-LSIZE, sy-vline,
  WA_PC2BL-LVMAX, sy-vline,
  WA_PC2BL-LVRND, sy-vline,
  WA_PC2BL-BEGDA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC2BL 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_PC2BL 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_PC2BL INTO WA_PC2BL.


*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_PC2BL_STR, 
GDATE TYPE STRING,
QTYPE TYPE STRING,
ACCOP TYPE STRING,
LVPER TYPE STRING,
LFREQ TYPE STRING,
LVDAT TYPE STRING,
LVNUM TYPE STRING,
LSIZE TYPE STRING,
LVMAX TYPE STRING,
LVRND TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
BEGDE TYPE STRING,
ENDDE TYPE STRING,
LRULE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC2BL_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_PC2BL_STR-GDATE sy-vline 
WA_PC2BL_STR-QTYPE sy-vline 
WA_PC2BL_STR-ACCOP sy-vline 
WA_PC2BL_STR-LVPER sy-vline 
WA_PC2BL_STR-LFREQ sy-vline 
WA_PC2BL_STR-LVDAT sy-vline 
WA_PC2BL_STR-LVNUM sy-vline 
WA_PC2BL_STR-LSIZE sy-vline 
WA_PC2BL_STR-LVMAX sy-vline 
WA_PC2BL_STR-LVRND sy-vline 
WA_PC2BL_STR-BEGDA sy-vline 
WA_PC2BL_STR-ENDDA sy-vline 
WA_PC2BL_STR-BEGDE sy-vline 
WA_PC2BL_STR-ENDDE sy-vline 
WA_PC2BL_STR-LRULE sy-vline      INTO ld_text SEPARATED BY SPACE.

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