ABAP Select data from SAP table ACTN_PARAMETER_MPPURCHASINGSL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACTN_PARAMETER_MPPURCHASINGSL
*  INTO TABLE @DATA(IT_ACTN_PARAMETER_MPPURCHASINGSL2).
*--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_ACTN_PARAMETER_MPPURCHASINGSL INDEX 1 INTO DATA(WA_ACTN_PARAMETER_MPPURCHASINGSL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACTN_PARAMETER_MPPURCHASINGSL>-SOURCELISTDRAFTUUID = 1.
<ACTN_PARAMETER_MPPURCHASINGSL>-ACTIVEPLANT = 1.
<ACTN_PARAMETER_MPPURCHASINGSL>-ACTIVEMATERIAL = 1.
<ACTN_PARAMETER_MPPURCHASINGSL>-SOURCELISTRECORD = 1.
<ACTN_PARAMETER_MPPURCHASINGSL>-VALIDITYSTARTDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACTN_PARAMETER_MPPURCHASINGSL-VALIDITYENDDATE, sy-vline,
  WA_ACTN_PARAMETER_MPPURCHASINGSL-SUPPLIER, sy-vline,
  WA_ACTN_PARAMETER_MPPURCHASINGSL-SUPPLIERISFIXED, sy-vline,
  WA_ACTN_PARAMETER_MPPURCHASINGSL-PURCHASEOUTLINEAGREEMENT, sy-vline,
  WA_ACTN_PARAMETER_MPPURCHASINGSL-PURCHASEOUTLINEAGREEMENTITEM, sy-vline,
  WA_ACTN_PARAMETER_MPPURCHASINGSL-PUROUTLINEAGREEMENTISFIXED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACTN_PARAMETER_MPPURCHASINGSL 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_ACTN_PARAMETER_MPPURCHASINGSL 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_ACTN_PARAMETER_MPPURCHASINGSL INTO WA_ACTN_PARAMETER_MPPURCHASINGSL.


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

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

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

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

*Conversion exit CUNIT, internal->external for field ORDERQUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ACTN_PARAMETER_MPPURCHASINGSL-ORDERQUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACTN_PARAMETER_MPPURCHASINGSL-ORDERQUANTITYUNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field CENTRALCONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ACTN_PARAMETER_MPPURCHASINGSL-CENTRALCONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACTN_PARAMETER_MPPURCHASINGSL-CENTRALCONTRACT.
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_ACTN_PARAMETER_MPPURCHASINGSL_STR, 
SOURCELISTDRAFTUUID TYPE STRING,
ACTIVEPLANT TYPE STRING,
ACTIVEMATERIAL TYPE STRING,
SOURCELISTRECORD TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERISFIXED TYPE STRING,
PURCHASEOUTLINEAGREEMENT TYPE STRING,
PURCHASEOUTLINEAGREEMENTITEM TYPE STRING,
PUROUTLINEAGREEMENTISFIXED TYPE STRING,
SUPPLYINGPLANT TYPE STRING,
ISSGPLANTISFIXED TYPE STRING,
MANUFACTURERMATERIAL TYPE STRING,
SOURCEOFSUPPLYISBLOCKED TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
SOURCELISTRECORDCATEGORY TYPE STRING,
MRPSOURCINGCONTROL TYPE STRING,
ORDERQUANTITYUNIT TYPE STRING,
ORIGINSYSTEM TYPE STRING,
INVENTORYSPECIALSTOCKTYPE TYPE STRING,
CENTRALCONTRACT TYPE STRING,
CENTRALCONTRACTITEM TYPE STRING,
REPLACE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACTN_PARAMETER_MPPURCHASINGSL_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_ACTN_PARAMETER_MPPURCHASINGSL_STR-SOURCELISTDRAFTUUID sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-ACTIVEPLANT sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-ACTIVEMATERIAL sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-SOURCELISTRECORD sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-VALIDITYSTARTDATE sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-VALIDITYENDDATE sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-SUPPLIER sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-SUPPLIERISFIXED sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-PURCHASEOUTLINEAGREEMENT sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-PURCHASEOUTLINEAGREEMENTITEM sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-PUROUTLINEAGREEMENTISFIXED sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-SUPPLYINGPLANT sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-ISSGPLANTISFIXED sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-MANUFACTURERMATERIAL sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-SOURCEOFSUPPLYISBLOCKED sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-PURCHASINGORGANIZATION sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-SOURCELISTRECORDCATEGORY sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-MRPSOURCINGCONTROL sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-ORDERQUANTITYUNIT sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-ORIGINSYSTEM sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-INVENTORYSPECIALSTOCKTYPE sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-CENTRALCONTRACT sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-CENTRALCONTRACTITEM sy-vline 
WA_ACTN_PARAMETER_MPPURCHASINGSL_STR-REPLACE sy-vline      INTO ld_text SEPARATED BY SPACE.

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