ABAP Select data from SAP table MMPUR_UI_CONTRACT_WL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_UI_CONTRACT_WL
*  INTO TABLE @DATA(IT_MMPUR_UI_CONTRACT_WL2).
*--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_MMPUR_UI_CONTRACT_WL INDEX 1 INTO DATA(WA_MMPUR_UI_CONTRACT_WL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_UI_CONTRACT_WL>-GENERATED_ID = 1.
<MMPUR_UI_CONTRACT_WL>-CNT = 1.
<MMPUR_UI_CONTRACT_WL>-PURCHASECONTRACT = 1.
<MMPUR_UI_CONTRACT_WL>-PURCHASECONTRACTITEM = 1.
<MMPUR_UI_CONTRACT_WL>-PURCHASECONTRACTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_UI_CONTRACT_WL-PURCHASINGDOCUMENTTYPENAME, sy-vline,
  WA_MMPUR_UI_CONTRACT_WL-PURCHASINGORGANIZATION, sy-vline,
  WA_MMPUR_UI_CONTRACT_WL-PURCHASINGORGANIZATIONNAME, sy-vline,
  WA_MMPUR_UI_CONTRACT_WL-SUPPLIER, sy-vline,
  WA_MMPUR_UI_CONTRACT_WL-SUPPLIERNAME, sy-vline,
  WA_MMPUR_UI_CONTRACT_WL-CREATIONDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_UI_CONTRACT_WL 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_MMPUR_UI_CONTRACT_WL 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_MMPUR_UI_CONTRACT_WL INTO WA_MMPUR_UI_CONTRACT_WL.


*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_MMPUR_UI_CONTRACT_WL-PURCHASECONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_UI_CONTRACT_WL-PURCHASECONTRACT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_UI_CONTRACT_WL-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_UI_CONTRACT_WL-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGUAGENAME
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_UI_CONTRACT_WL-LANGUAGENAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_UI_CONTRACT_WL-LANGUAGENAME.
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_MMPUR_UI_CONTRACT_WL_STR, 
GENERATED_ID TYPE STRING,
CNT TYPE STRING,
PURCHASECONTRACT TYPE STRING,
PURCHASECONTRACTITEM TYPE STRING,
PURCHASECONTRACTTYPE TYPE STRING,
PURCHASINGDOCUMENTTYPENAME TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGORGANIZATIONNAME TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERNAME TYPE STRING,
CREATIONDATE TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
MATERIAL TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PURCHASINGGROUPNAME TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
RELEASEORDERITEMNETAMOUNT TYPE STRING,
RELEASEORDERCURRENCY TYPE STRING,
COMPANYCODE TYPE STRING,
COMPANYCODENAME TYPE STRING,
INCOTERMSCLASSIFICATION TYPE STRING,
INCOTERMSCLASSIFICATIONNAME TYPE STRING,
INCOTERMSTRANSFERLOCATION TYPE STRING,
PAYMENTTERMS TYPE STRING,
CASHDISCOUNT1DAYS TYPE STRING,
CASHDISCOUNT2DAYS TYPE STRING,
NETPAYMENTDAYS TYPE STRING,
CASHDISCOUNT1PERCENT TYPE STRING,
CASHDISCOUNT2PERCENT TYPE STRING,
LANGUAGENAME TYPE STRING,
NUMBEROFRECORDS TYPE STRING,
PURCHASECONTRACTTARGETAMOUNT TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
PURCHASECONTRACTVALIDITYSTATUS TYPE STRING,
RELEASECODE TYPE STRING,
ACCWORKFLOWAPPROVER TYPE STRING,
ACCWORKFLOWAPPROVERFIRSTNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_UI_CONTRACT_WL_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_MMPUR_UI_CONTRACT_WL_STR-GENERATED_ID sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-CNT sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-PURCHASECONTRACT sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-PURCHASECONTRACTITEM sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-PURCHASECONTRACTTYPE sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-PURCHASINGDOCUMENTTYPENAME sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-PURCHASINGORGANIZATION sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-PURCHASINGORGANIZATIONNAME sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-SUPPLIER sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-SUPPLIERNAME sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-CREATIONDATE sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-MATERIAL sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-PURCHASINGGROUP sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-PURCHASINGGROUPNAME sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-DOCUMENTCURRENCY sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-RELEASEORDERITEMNETAMOUNT sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-RELEASEORDERCURRENCY sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-COMPANYCODE sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-COMPANYCODENAME sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-INCOTERMSCLASSIFICATION sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-INCOTERMSCLASSIFICATIONNAME sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-INCOTERMSTRANSFERLOCATION sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-PAYMENTTERMS sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-CASHDISCOUNT1DAYS sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-CASHDISCOUNT2DAYS sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-NETPAYMENTDAYS sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-CASHDISCOUNT1PERCENT sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-CASHDISCOUNT2PERCENT sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-LANGUAGENAME sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-NUMBEROFRECORDS sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-PURCHASECONTRACTTARGETAMOUNT sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-VALIDITYSTARTDATE sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-VALIDITYENDDATE sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-PURCHASECONTRACTVALIDITYSTATUS sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-RELEASECODE sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-ACCWORKFLOWAPPROVER sy-vline 
WA_MMPUR_UI_CONTRACT_WL_STR-ACCWORKFLOWAPPROVERFIRSTNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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