ABAP Select data from SAP table PC2G3 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 PC2G3 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 PC2G3. 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 PC2G3 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_PC2G3 TYPE STANDARD TABLE OF PC2G3,
      WA_PC2G3 TYPE PC2G3,
      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: <PC2G3> TYPE PC2G3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC2G3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC2G3
  INTO TABLE IT_PC2G3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC2G3
*  INTO TABLE @DATA(IT_PC2G32).
*--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_PC2G3 INDEX 1 INTO DATA(WA_PC2G32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC2G3 ASSIGNING <PC2G3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC2G3>-BEGDA = 1.
<PC2G3>-ENDDA = 1.
<PC2G3>-PHFNO = 1.
<PC2G3>-CONBR = 1.
<PC2G3>-CONAR = 1.

ENDLOOP.

LOOP AT IT_PC2G3 INTO WA_PC2G3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC2G3-CONGR, sy-vline,
  WA_PC2G3-CONLV, sy-vline,
  WA_PC2G3-PBYER, sy-vline,
  WA_PC2G3-EEIND, sy-vline,
  WA_PC2G3-EERAT, sy-vline,
  WA_PC2G3-EECON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC2G3 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_PC2G3 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_PC2G3 INTO WA_PC2G3.


*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_PC2G3_STR, 
BEGDA TYPE STRING,
ENDDA TYPE STRING,
PHFNO TYPE STRING,
CONBR TYPE STRING,
CONAR TYPE STRING,
CONGR TYPE STRING,
CONLV TYPE STRING,
PBYER TYPE STRING,
EEIND TYPE STRING,
EERAT TYPE STRING,
EECON TYPE STRING,
ECCUR TYPE STRING,
EELOW TYPE STRING,
EELCU TYPE STRING,
EEHIG TYPE STRING,
EEHCU TYPE STRING,
ERIND TYPE STRING,
ERRAT TYPE STRING,
ERCON TYPE STRING,
RCCUR TYPE STRING,
ERLOW TYPE STRING,
ERLCU TYPE STRING,
ERHIG TYPE STRING,
ERHCU TYPE STRING,
MOCON TYPE STRING,
HITAX TYPE STRING,
EERAT3 TYPE STRING,
ERRAT3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC2G3_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_PC2G3_STR-BEGDA sy-vline 
WA_PC2G3_STR-ENDDA sy-vline 
WA_PC2G3_STR-PHFNO sy-vline 
WA_PC2G3_STR-CONBR sy-vline 
WA_PC2G3_STR-CONAR sy-vline 
WA_PC2G3_STR-CONGR sy-vline 
WA_PC2G3_STR-CONLV sy-vline 
WA_PC2G3_STR-PBYER sy-vline 
WA_PC2G3_STR-EEIND sy-vline 
WA_PC2G3_STR-EERAT sy-vline 
WA_PC2G3_STR-EECON sy-vline 
WA_PC2G3_STR-ECCUR sy-vline 
WA_PC2G3_STR-EELOW sy-vline 
WA_PC2G3_STR-EELCU sy-vline 
WA_PC2G3_STR-EEHIG sy-vline 
WA_PC2G3_STR-EEHCU sy-vline 
WA_PC2G3_STR-ERIND sy-vline 
WA_PC2G3_STR-ERRAT sy-vline 
WA_PC2G3_STR-ERCON sy-vline 
WA_PC2G3_STR-RCCUR sy-vline 
WA_PC2G3_STR-ERLOW sy-vline 
WA_PC2G3_STR-ERLCU sy-vline 
WA_PC2G3_STR-ERHIG sy-vline 
WA_PC2G3_STR-ERHCU sy-vline 
WA_PC2G3_STR-MOCON sy-vline 
WA_PC2G3_STR-HITAX sy-vline 
WA_PC2G3_STR-EERAT3 sy-vline 
WA_PC2G3_STR-ERRAT3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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