ABAP Select data from SAP table /PF1/DB_PO_CHECK into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /PF1/DB_PO_CHECK 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 /PF1/DB_PO_CHECK. 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 /PF1/DB_PO_CHECK 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_/PF1/DB_PO_CHECK TYPE STANDARD TABLE OF /PF1/DB_PO_CHECK,
      WA_/PF1/DB_PO_CHECK TYPE /PF1/DB_PO_CHECK,
      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: </PF1/DB_PO_CHECK> TYPE /PF1/DB_PO_CHECK.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/PF1/DB_PO_CHECK.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /PF1/DB_PO_CHECK
  INTO TABLE IT_/PF1/DB_PO_CHECK.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PF1/DB_PO_CHECK
*  INTO TABLE @DATA(IT_/PF1/DB_PO_CHECK2).
*--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_/PF1/DB_PO_CHECK INDEX 1 INTO DATA(WA_/PF1/DB_PO_CHECK2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/PF1/DB_PO_CHECK ASSIGNING </PF1/DB_PO_CHECK>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PF1/DB_PO_CHECK>-CLIENT = 1.
</PF1/DB_PO_CHECK>-GUID = 1.
</PF1/DB_PO_CHECK>-CLEARING_AREA = 1.
</PF1/DB_PO_CHECK>-PO_DATE = 1.
</PF1/DB_PO_CHECK>-PO_NO = 1.

ENDLOOP.

LOOP AT IT_/PF1/DB_PO_CHECK INTO WA_/PF1/DB_PO_CHECK.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PF1/DB_PO_CHECK-REF_EXT_PO, sy-vline,
  WA_/PF1/DB_PO_CHECK-CNT_ORP_ITEMS, sy-vline,
  WA_/PF1/DB_PO_CHECK-CNT_RCP_ITEMS, sy-vline,
  WA_/PF1/DB_PO_CHECK-CNT_CLR_ITEMS, sy-vline,
  WA_/PF1/DB_PO_CHECK-CNT_TOV_ITEMS, sy-vline,
  WA_/PF1/DB_PO_CHECK-SUM_ITEMS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PF1/DB_PO_CHECK 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_/PF1/DB_PO_CHECK 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_/PF1/DB_PO_CHECK INTO WA_/PF1/DB_PO_CHECK.


*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_/PF1/DB_PO_CHECK_STR, 
CLIENT TYPE STRING,
GUID TYPE STRING,
CLEARING_AREA TYPE STRING,
PO_DATE TYPE STRING,
PO_NO TYPE STRING,
REF_EXT_PO TYPE STRING,
CNT_ORP_ITEMS TYPE STRING,
CNT_RCP_ITEMS TYPE STRING,
CNT_CLR_ITEMS TYPE STRING,
CNT_TOV_ITEMS TYPE STRING,
SUM_ITEMS TYPE STRING,
SUM_BANKKEY TYPE STRING,
SUM_ACCT_NO TYPE STRING,
SUM_IBAN TYPE STRING,
SUM_BIC TYPE STRING,
SUM_REMITTANCE TYPE STRING,
VALID_TILL_DATE TYPE STRING,
TAPE_CRDT TYPE STRING,
ONGOING_FL_NO TYPE STRING,
FLG_FILE_CHCKSM TYPE STRING,
TIMESTAMP_SBM_PS TYPE STRING,
CHECKSUM TYPE STRING,
END_TO_END_ID TYPE STRING,
ORG_ID TYPE STRING,
CRUSR TYPE STRING,
CRDAT TYPE STRING,
CRTIM TYPE STRING,
CHUSR TYPE STRING,
CHDAT TYPE STRING,
CHTIM TYPE STRING,
RLUSR TYPE STRING,
RLDAT TYPE STRING,
RLTIM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PF1/DB_PO_CHECK_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_/PF1/DB_PO_CHECK_STR-CLIENT sy-vline 
WA_/PF1/DB_PO_CHECK_STR-GUID sy-vline 
WA_/PF1/DB_PO_CHECK_STR-CLEARING_AREA sy-vline 
WA_/PF1/DB_PO_CHECK_STR-PO_DATE sy-vline 
WA_/PF1/DB_PO_CHECK_STR-PO_NO sy-vline 
WA_/PF1/DB_PO_CHECK_STR-REF_EXT_PO sy-vline 
WA_/PF1/DB_PO_CHECK_STR-CNT_ORP_ITEMS sy-vline 
WA_/PF1/DB_PO_CHECK_STR-CNT_RCP_ITEMS sy-vline 
WA_/PF1/DB_PO_CHECK_STR-CNT_CLR_ITEMS sy-vline 
WA_/PF1/DB_PO_CHECK_STR-CNT_TOV_ITEMS sy-vline 
WA_/PF1/DB_PO_CHECK_STR-SUM_ITEMS sy-vline 
WA_/PF1/DB_PO_CHECK_STR-SUM_BANKKEY sy-vline 
WA_/PF1/DB_PO_CHECK_STR-SUM_ACCT_NO sy-vline 
WA_/PF1/DB_PO_CHECK_STR-SUM_IBAN sy-vline 
WA_/PF1/DB_PO_CHECK_STR-SUM_BIC sy-vline 
WA_/PF1/DB_PO_CHECK_STR-SUM_REMITTANCE sy-vline 
WA_/PF1/DB_PO_CHECK_STR-VALID_TILL_DATE sy-vline 
WA_/PF1/DB_PO_CHECK_STR-TAPE_CRDT sy-vline 
WA_/PF1/DB_PO_CHECK_STR-ONGOING_FL_NO sy-vline 
WA_/PF1/DB_PO_CHECK_STR-FLG_FILE_CHCKSM sy-vline 
WA_/PF1/DB_PO_CHECK_STR-TIMESTAMP_SBM_PS sy-vline 
WA_/PF1/DB_PO_CHECK_STR-CHECKSUM sy-vline 
WA_/PF1/DB_PO_CHECK_STR-END_TO_END_ID sy-vline 
WA_/PF1/DB_PO_CHECK_STR-ORG_ID sy-vline 
WA_/PF1/DB_PO_CHECK_STR-CRUSR sy-vline 
WA_/PF1/DB_PO_CHECK_STR-CRDAT sy-vline 
WA_/PF1/DB_PO_CHECK_STR-CRTIM sy-vline 
WA_/PF1/DB_PO_CHECK_STR-CHUSR sy-vline 
WA_/PF1/DB_PO_CHECK_STR-CHDAT sy-vline 
WA_/PF1/DB_PO_CHECK_STR-CHTIM sy-vline 
WA_/PF1/DB_PO_CHECK_STR-RLUSR sy-vline 
WA_/PF1/DB_PO_CHECK_STR-RLDAT sy-vline 
WA_/PF1/DB_PO_CHECK_STR-RLTIM sy-vline      INTO ld_text SEPARATED BY SPACE.

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