ABAP Select data from SAP table PC2GA into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC2GA 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 PC2GA. 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 PC2GA 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_PC2GA TYPE STANDARD TABLE OF PC2GA,
      WA_PC2GA TYPE PC2GA,
      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: <PC2GA> TYPE PC2GA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC2GA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC2GA
  INTO TABLE IT_PC2GA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC2GA
*  INTO TABLE @DATA(IT_PC2GA2).
*--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_PC2GA INDEX 1 INTO DATA(WA_PC2GA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC2GA ASSIGNING <PC2GA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC2GA>-IONUM = 1.
<PC2GA>-JURIS = 1.
<PC2GA>-GCATE = 1.
<PC2GA>-DFPRI = 1.
<PC2GA>-GFCOD = 1.

ENDLOOP.

LOOP AT IT_PC2GA INTO WA_PC2GA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC2GA-ORDDA, sy-vline,
  WA_PC2GA-PAYTY, sy-vline,
  WA_PC2GA-PERMO, sy-vline,
  WA_PC2GA-PABRD, sy-vline,
  WA_PC2GA-LABRD, sy-vline,
  WA_PC2GA-PABRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC2GA 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_PC2GA 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_PC2GA INTO WA_PC2GA.


*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.

*Conversion exit GJAHR, internal->external for field PABRJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PC2GA-PABRJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC2GA-PABRJ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field CYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PC2GA-CYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC2GA-CYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PC2GA-LIFNR1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC2GA-LIFNR1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PC2GA-LIFNR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC2GA-LIFNR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR3
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PC2GA-LIFNR3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC2GA-LIFNR3.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PC2GA_STR, 
IONUM TYPE STRING,
JURIS TYPE STRING,
GCATE TYPE STRING,
DFPRI TYPE STRING,
GFCOD TYPE STRING,
ORDDA TYPE STRING,
PAYTY TYPE STRING,
PERMO TYPE STRING,
PABRD TYPE STRING,
LABRD TYPE STRING,
PABRP TYPE STRING,
PABRJ TYPE STRING,
ZEINH TYPE STRING,
CMONT TYPE STRING,
CYEAR TYPE STRING,
BABRP TYPE STRING,
EABRP TYPE STRING,
NPPYA TYPE STRING,
DATMO TYPE STRING,
CRETY TYPE STRING,
CRENR TYPE STRING,
LIFNR1 TYPE STRING,
LIFNR2 TYPE STRING,
LIFNR3 TYPE STRING,
LIFSG1 TYPE STRING,
LIFSG2 TYPE STRING,
LIFSG3 TYPE STRING,
RULNR TYPE STRING,
EMFTX1 TYPE STRING,
EMFTX2 TYPE STRING,
EMFTX3 TYPE STRING,
PRITY1 TYPE STRING,
PRITY2 TYPE STRING,
PRITY3 TYPE STRING,
BANKN1 TYPE STRING,
BANKN2 TYPE STRING,
BANKN3 TYPE STRING,
ZLSCH1 TYPE STRING,
ZLSCH2 TYPE STRING,
ZLSCH3 TYPE STRING,
IOSCI TYPE STRING,
IOSRT TYPE STRING,
IOSTS TYPE STRING,
IOSHT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC2GA_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_PC2GA_STR-IONUM sy-vline 
WA_PC2GA_STR-JURIS sy-vline 
WA_PC2GA_STR-GCATE sy-vline 
WA_PC2GA_STR-DFPRI sy-vline 
WA_PC2GA_STR-GFCOD sy-vline 
WA_PC2GA_STR-ORDDA sy-vline 
WA_PC2GA_STR-PAYTY sy-vline 
WA_PC2GA_STR-PERMO sy-vline 
WA_PC2GA_STR-PABRD sy-vline 
WA_PC2GA_STR-LABRD sy-vline 
WA_PC2GA_STR-PABRP sy-vline 
WA_PC2GA_STR-PABRJ sy-vline 
WA_PC2GA_STR-ZEINH sy-vline 
WA_PC2GA_STR-CMONT sy-vline 
WA_PC2GA_STR-CYEAR sy-vline 
WA_PC2GA_STR-BABRP sy-vline 
WA_PC2GA_STR-EABRP sy-vline 
WA_PC2GA_STR-NPPYA sy-vline 
WA_PC2GA_STR-DATMO sy-vline 
WA_PC2GA_STR-CRETY sy-vline 
WA_PC2GA_STR-CRENR sy-vline 
WA_PC2GA_STR-LIFNR1 sy-vline 
WA_PC2GA_STR-LIFNR2 sy-vline 
WA_PC2GA_STR-LIFNR3 sy-vline 
WA_PC2GA_STR-LIFSG1 sy-vline 
WA_PC2GA_STR-LIFSG2 sy-vline 
WA_PC2GA_STR-LIFSG3 sy-vline 
WA_PC2GA_STR-RULNR sy-vline 
WA_PC2GA_STR-EMFTX1 sy-vline 
WA_PC2GA_STR-EMFTX2 sy-vline 
WA_PC2GA_STR-EMFTX3 sy-vline 
WA_PC2GA_STR-PRITY1 sy-vline 
WA_PC2GA_STR-PRITY2 sy-vline 
WA_PC2GA_STR-PRITY3 sy-vline 
WA_PC2GA_STR-BANKN1 sy-vline 
WA_PC2GA_STR-BANKN2 sy-vline 
WA_PC2GA_STR-BANKN3 sy-vline 
WA_PC2GA_STR-ZLSCH1 sy-vline 
WA_PC2GA_STR-ZLSCH2 sy-vline 
WA_PC2GA_STR-ZLSCH3 sy-vline 
WA_PC2GA_STR-IOSCI sy-vline 
WA_PC2GA_STR-IOSRT sy-vline 
WA_PC2GA_STR-IOSTS sy-vline 
WA_PC2GA_STR-IOSHT sy-vline      INTO ld_text SEPARATED BY SPACE.

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