ABAP Select data from SAP table PRECONTRACT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PRECONTRACT
*  INTO TABLE @DATA(IT_PRECONTRACT2).
*--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_PRECONTRACT INDEX 1 INTO DATA(WA_PRECONTRACT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PRECONTRACT>-MANDT = 1.
<PRECONTRACT>-COMPANYCODE = 1.
<PRECONTRACT>-REALESTATECONTRACT = 1.
<PRECONTRACT>-INTERNALREALESTATENUMBER = 1.
<PRECONTRACT>-STATUSOBJECT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PRECONTRACT-CREATEDBYUSER, sy-vline,
  WA_PRECONTRACT-CREATIONDATE, sy-vline,
  WA_PRECONTRACT-CREATIONTIME, sy-vline,
  WA_PRECONTRACT-LASTCHANGEDATE, sy-vline,
  WA_PRECONTRACT-LASTCHANGETIME, sy-vline,
  WA_PRECONTRACT-LASTCHANGEDBYUSER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PRECONTRACT 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_PRECONTRACT 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_PRECONTRACT INTO WA_PRECONTRACT.


*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 REALESTATECONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRECONTRACT-REALESTATECONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRECONTRACT-REALESTATECONTRACT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECONTRACTNUMBEROLD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRECONTRACT-RECONTRACTNUMBEROLD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRECONTRACT-RECONTRACTNUMBEROLD.
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_PRECONTRACT_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
REALESTATECONTRACT TYPE STRING,
INTERNALREALESTATENUMBER TYPE STRING,
STATUSOBJECT TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
CREATIONTIME TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LASTCHANGETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
RECONTRACTNAME TYPE STRING,
CONTRACTSTARTDATE TYPE STRING,
VALUATIONRELEVANCE TYPE STRING,
CONTRACTENDDATE TYPE STRING,
RECONTRACTFIRSTENDDATE TYPE STRING,
RECONTRACTNOTICEDATE TYPE STRING,
REAUTHORIZATIONGROUP TYPE STRING,
REIDENTIFICATIONTYPE TYPE STRING,
REIDENTIFICATIONKEY TYPE STRING,
RECONTRACTTYPE TYPE STRING,
RECONTRACTNUMBEROLD TYPE STRING,
RESPONSIBLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PRECONTRACT_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_PRECONTRACT_STR-MANDT sy-vline 
WA_PRECONTRACT_STR-COMPANYCODE sy-vline 
WA_PRECONTRACT_STR-REALESTATECONTRACT sy-vline 
WA_PRECONTRACT_STR-INTERNALREALESTATENUMBER sy-vline 
WA_PRECONTRACT_STR-STATUSOBJECT sy-vline 
WA_PRECONTRACT_STR-CREATEDBYUSER sy-vline 
WA_PRECONTRACT_STR-CREATIONDATE sy-vline 
WA_PRECONTRACT_STR-CREATIONTIME sy-vline 
WA_PRECONTRACT_STR-LASTCHANGEDATE sy-vline 
WA_PRECONTRACT_STR-LASTCHANGETIME sy-vline 
WA_PRECONTRACT_STR-LASTCHANGEDBYUSER sy-vline 
WA_PRECONTRACT_STR-RECONTRACTNAME sy-vline 
WA_PRECONTRACT_STR-CONTRACTSTARTDATE sy-vline 
WA_PRECONTRACT_STR-VALUATIONRELEVANCE sy-vline 
WA_PRECONTRACT_STR-CONTRACTENDDATE sy-vline 
WA_PRECONTRACT_STR-RECONTRACTFIRSTENDDATE sy-vline 
WA_PRECONTRACT_STR-RECONTRACTNOTICEDATE sy-vline 
WA_PRECONTRACT_STR-REAUTHORIZATIONGROUP sy-vline 
WA_PRECONTRACT_STR-REIDENTIFICATIONTYPE sy-vline 
WA_PRECONTRACT_STR-REIDENTIFICATIONKEY sy-vline 
WA_PRECONTRACT_STR-RECONTRACTTYPE sy-vline 
WA_PRECONTRACT_STR-RECONTRACTNUMBEROLD sy-vline 
WA_PRECONTRACT_STR-RESPONSIBLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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