ABAP Select data from SAP table ISPURREQNSSPMAINTACCASSIGN_WD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISPURREQNSSPMAINTACCASSIGN_WD
*  INTO TABLE @DATA(IT_ISPURREQNSSPMAINTACCASSIGN_WD2).
*--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_ISPURREQNSSPMAINTACCASSIGN_WD INDEX 1 INTO DATA(WA_ISPURREQNSSPMAINTACCASSIGN_WD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISPURREQNSSPMAINTACCASSIGN_WD>-KEY = 1.
<ISPURREQNSSPMAINTACCASSIGN_WD>-PARENT_KEY = 1.
<ISPURREQNSSPMAINTACCASSIGN_WD>-ROOT_KEY = 1.
<ISPURREQNSSPMAINTACCASSIGN_WD>-PURREQNSSPDRAFTUUID = 1.
<ISPURREQNSSPMAINTACCASSIGN_WD>-PURCHASEREQUISITIONSSP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISPURREQNSSPMAINTACCASSIGN_WD-PURCHASEREQUISITIONSSPITEM, sy-vline,
  WA_ISPURREQNSSPMAINTACCASSIGN_WD-PURREQNSSPACCOUNTLINE, sy-vline,
  WA_ISPURREQNSSPMAINTACCASSIGN_WD-ACCOUNTINGLINE, sy-vline,
  WA_ISPURREQNSSPMAINTACCASSIGN_WD-GLACCOUNT, sy-vline,
  WA_ISPURREQNSSPMAINTACCASSIGN_WD-PERCENTAGE, sy-vline,
  WA_ISPURREQNSSPMAINTACCASSIGN_WD-QUANTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISPURREQNSSPMAINTACCASSIGN_WD 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_ISPURREQNSSPMAINTACCASSIGN_WD 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_ISPURREQNSSPMAINTACCASSIGN_WD INTO WA_ISPURREQNSSPMAINTACCASSIGN_WD.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field NETWORK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISPURREQNSSPMAINTACCASSIGN_WD-NETWORK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISPURREQNSSPMAINTACCASSIGN_WD-NETWORK.
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_ISPURREQNSSPMAINTACCASSIGN_WD_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
PURREQNSSPDRAFTUUID TYPE STRING,
PURCHASEREQUISITIONSSP TYPE STRING,
PURCHASEREQUISITIONSSPITEM TYPE STRING,
PURREQNSSPACCOUNTLINE TYPE STRING,
ACCOUNTINGLINE TYPE STRING,
GLACCOUNT TYPE STRING,
PERCENTAGE TYPE STRING,
QUANTITY TYPE STRING,
NETVALUE TYPE STRING,
LEADINGVALUE TYPE STRING,
HASACTIVEENTITY TYPE STRING,
COSTCENTER TYPE STRING,
MAINASSETNUMBER TYPE STRING,
ASSETSUBNUMBER TYPE STRING,
SALESORDER TYPE STRING,
SALERSORDERITEM TYPE STRING,
SCEDULELINE TYPE STRING,
ORDERNO TYPE STRING,
NETWORK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISPURREQNSSPMAINTACCASSIGN_WD_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_ISPURREQNSSPMAINTACCASSIGN_WD_STR-KEY sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-PARENT_KEY sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-ROOT_KEY sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-PURREQNSSPDRAFTUUID sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-PURCHASEREQUISITIONSSP sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-PURCHASEREQUISITIONSSPITEM sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-PURREQNSSPACCOUNTLINE sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-ACCOUNTINGLINE sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-GLACCOUNT sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-PERCENTAGE sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-QUANTITY sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-NETVALUE sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-LEADINGVALUE sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-HASACTIVEENTITY sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-COSTCENTER sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-MAINASSETNUMBER sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-ASSETSUBNUMBER sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-SALESORDER sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-SALERSORDERITEM sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-SCEDULELINE sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-ORDERNO sy-vline 
WA_ISPURREQNSSPMAINTACCASSIGN_WD_STR-NETWORK sy-vline      INTO ld_text SEPARATED BY SPACE.

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