ABAP Select data from SAP table PQTYCONTRACT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PQTYCONTRACT
*  INTO TABLE @DATA(IT_PQTYCONTRACT2).
*--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_PQTYCONTRACT INDEX 1 INTO DATA(WA_PQTYCONTRACT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PQTYCONTRACT>-MANDT = 1.
<PQTYCONTRACT>-PURCHASECONTRACT = 1.
<PQTYCONTRACT>-PURCHASECONTRACTTYPE = 1.
<PQTYCONTRACT>-PURCHASINGORGANIZATION = 1.
<PQTYCONTRACT>-PURCHASINGGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PQTYCONTRACT-PLANT, sy-vline,
  WA_PQTYCONTRACT-PURCHASECONTRACTITEM, sy-vline,
  WA_PQTYCONTRACT-CALENDARYEAR, sy-vline,
  WA_PQTYCONTRACT-CALENDARQUARTER, sy-vline,
  WA_PQTYCONTRACT-CALENDARMONTH, sy-vline,
  WA_PQTYCONTRACT-CALENDARWEEK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PQTYCONTRACT 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_PQTYCONTRACT 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_PQTYCONTRACT INTO WA_PQTYCONTRACT.


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

*Conversion exit CUNIT, internal->external for field ORDERQUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PQTYCONTRACT-ORDERQUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PQTYCONTRACT-ORDERQUANTITYUNIT.
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_PQTYCONTRACT_STR, 
MANDT TYPE STRING,
PURCHASECONTRACT TYPE STRING,
PURCHASECONTRACTTYPE TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PLANT TYPE STRING,
PURCHASECONTRACTITEM TYPE STRING,
CALENDARYEAR TYPE STRING,
CALENDARQUARTER TYPE STRING,
CALENDARMONTH TYPE STRING,
CALENDARWEEK TYPE STRING,
ORDERQUANTITYUNIT TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
TARGETQUANTITY TYPE STRING,
TARGETAMOUNT TYPE STRING,
CONT_LEN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PQTYCONTRACT_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_PQTYCONTRACT_STR-MANDT sy-vline 
WA_PQTYCONTRACT_STR-PURCHASECONTRACT sy-vline 
WA_PQTYCONTRACT_STR-PURCHASECONTRACTTYPE sy-vline 
WA_PQTYCONTRACT_STR-PURCHASINGORGANIZATION sy-vline 
WA_PQTYCONTRACT_STR-PURCHASINGGROUP sy-vline 
WA_PQTYCONTRACT_STR-PLANT sy-vline 
WA_PQTYCONTRACT_STR-PURCHASECONTRACTITEM sy-vline 
WA_PQTYCONTRACT_STR-CALENDARYEAR sy-vline 
WA_PQTYCONTRACT_STR-CALENDARQUARTER sy-vline 
WA_PQTYCONTRACT_STR-CALENDARMONTH sy-vline 
WA_PQTYCONTRACT_STR-CALENDARWEEK sy-vline 
WA_PQTYCONTRACT_STR-ORDERQUANTITYUNIT sy-vline 
WA_PQTYCONTRACT_STR-VALIDITYSTARTDATE sy-vline 
WA_PQTYCONTRACT_STR-VALIDITYENDDATE sy-vline 
WA_PQTYCONTRACT_STR-TARGETQUANTITY sy-vline 
WA_PQTYCONTRACT_STR-TARGETAMOUNT sy-vline 
WA_PQTYCONTRACT_STR-CONT_LEN sy-vline      INTO ld_text SEPARATED BY SPACE.

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