ABAP Select data from SAP table PCTRMAINTTRANS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCTRMAINTTRANS
*  INTO TABLE @DATA(IT_PCTRMAINTTRANS2).
*--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_PCTRMAINTTRANS INDEX 1 INTO DATA(WA_PCTRMAINTTRANS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCTRMAINTTRANS>-MANDT = 1.
<PCTRMAINTTRANS>-PURCHASECONTRACT = 1.
<PCTRMAINTTRANS>-PURCHASECONTRACTTYPE = 1.
<PCTRMAINTTRANS>-PURCHASECONTRACTCLASSIFICATION = 1.
<PCTRMAINTTRANS>-CONTRACTEXPIRYPREDICTEDDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCTRMAINTTRANS-PURCHASINGDOCUMENTTYPENAME, sy-vline,
  WA_PCTRMAINTTRANS-PURCHASECONTRACTCONSUMEDAMOUNT, sy-vline,
  WA_PCTRMAINTTRANS-NUMBEROFDAYS, sy-vline,
  WA_PCTRMAINTTRANS-ISEXPIRED, sy-vline,
  WA_PCTRMAINTTRANS-SUPPLIEROPERATIONALSCORE, sy-vline,
  WA_PCTRMAINTTRANS-PURCHASECONTRACTVALIDITYSTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCTRMAINTTRANS 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_PCTRMAINTTRANS 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_PCTRMAINTTRANS INTO WA_PCTRMAINTTRANS.


*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_PCTRMAINTTRANS-PURCHASECONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PCTRMAINTTRANS-PURCHASECONTRACT.
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_PCTRMAINTTRANS_STR, 
MANDT TYPE STRING,
PURCHASECONTRACT TYPE STRING,
PURCHASECONTRACTTYPE TYPE STRING,
PURCHASECONTRACTCLASSIFICATION TYPE STRING,
CONTRACTEXPIRYPREDICTEDDATE TYPE STRING,
PURCHASINGDOCUMENTTYPENAME TYPE STRING,
PURCHASECONTRACTCONSUMEDAMOUNT TYPE STRING,
NUMBEROFDAYS TYPE STRING,
ISEXPIRED TYPE STRING,
SUPPLIEROPERATIONALSCORE TYPE STRING,
PURCHASECONTRACTVALIDITYSTATUS TYPE STRING,
PURCONTRSTATUSCRITICALITY TYPE STRING,
PURCONTRVALIDITYSTATUSNAME TYPE STRING,
PURCONTRHASADVNCDUSRINTERFACE TYPE STRING,
PURCONTROUTPUTCTRLTYPE TYPE STRING,
PURCONTROUTPUTCTRLSTATUS TYPE STRING,
PURCONTROUTPUTCTRLSTATUSTXT TYPE STRING,
PURCONTROUTPUTCTRLDATETIME TYPE STRING,
ACCWORKFLOWAPPROVER TYPE STRING,
ACCWORKFLOWAPPROVERFIRSTNAME TYPE STRING,
APPROVALSTATUSNAME TYPE STRING,
APPROVERUSER TYPE STRING,
WEIGHTEDRELEVANCE TYPE STRING,
ISCONTRREFOFPURREQN TYPE STRING,
CONTRACTCONSUMPTIONINPCT TYPE STRING,
PURCONTRCNSMPNCRITICALITY TYPE STRING,
ISPURCONTRTEMPLATE TYPE STRING,
CHANGERECORDREFERENCEUUID TYPE STRING,
CREATEDBYUSERNAME TYPE STRING,
PURGCONTRACTISINPREPARATION TYPE STRING,
PURCHASINGDOCUMENTSTATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCTRMAINTTRANS_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_PCTRMAINTTRANS_STR-MANDT sy-vline 
WA_PCTRMAINTTRANS_STR-PURCHASECONTRACT sy-vline 
WA_PCTRMAINTTRANS_STR-PURCHASECONTRACTTYPE sy-vline 
WA_PCTRMAINTTRANS_STR-PURCHASECONTRACTCLASSIFICATION sy-vline 
WA_PCTRMAINTTRANS_STR-CONTRACTEXPIRYPREDICTEDDATE sy-vline 
WA_PCTRMAINTTRANS_STR-PURCHASINGDOCUMENTTYPENAME sy-vline 
WA_PCTRMAINTTRANS_STR-PURCHASECONTRACTCONSUMEDAMOUNT sy-vline 
WA_PCTRMAINTTRANS_STR-NUMBEROFDAYS sy-vline 
WA_PCTRMAINTTRANS_STR-ISEXPIRED sy-vline 
WA_PCTRMAINTTRANS_STR-SUPPLIEROPERATIONALSCORE sy-vline 
WA_PCTRMAINTTRANS_STR-PURCHASECONTRACTVALIDITYSTATUS sy-vline 
WA_PCTRMAINTTRANS_STR-PURCONTRSTATUSCRITICALITY sy-vline 
WA_PCTRMAINTTRANS_STR-PURCONTRVALIDITYSTATUSNAME sy-vline 
WA_PCTRMAINTTRANS_STR-PURCONTRHASADVNCDUSRINTERFACE sy-vline 
WA_PCTRMAINTTRANS_STR-PURCONTROUTPUTCTRLTYPE sy-vline 
WA_PCTRMAINTTRANS_STR-PURCONTROUTPUTCTRLSTATUS sy-vline 
WA_PCTRMAINTTRANS_STR-PURCONTROUTPUTCTRLSTATUSTXT sy-vline 
WA_PCTRMAINTTRANS_STR-PURCONTROUTPUTCTRLDATETIME sy-vline 
WA_PCTRMAINTTRANS_STR-ACCWORKFLOWAPPROVER sy-vline 
WA_PCTRMAINTTRANS_STR-ACCWORKFLOWAPPROVERFIRSTNAME sy-vline 
WA_PCTRMAINTTRANS_STR-APPROVALSTATUSNAME sy-vline 
WA_PCTRMAINTTRANS_STR-APPROVERUSER sy-vline 
WA_PCTRMAINTTRANS_STR-WEIGHTEDRELEVANCE sy-vline 
WA_PCTRMAINTTRANS_STR-ISCONTRREFOFPURREQN sy-vline 
WA_PCTRMAINTTRANS_STR-CONTRACTCONSUMPTIONINPCT sy-vline 
WA_PCTRMAINTTRANS_STR-PURCONTRCNSMPNCRITICALITY sy-vline 
WA_PCTRMAINTTRANS_STR-ISPURCONTRTEMPLATE sy-vline 
WA_PCTRMAINTTRANS_STR-CHANGERECORDREFERENCEUUID sy-vline 
WA_PCTRMAINTTRANS_STR-CREATEDBYUSERNAME sy-vline 
WA_PCTRMAINTTRANS_STR-PURGCONTRACTISINPREPARATION sy-vline 
WA_PCTRMAINTTRANS_STR-PURCHASINGDOCUMENTSTATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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