ABAP Select data from SAP table CGBPURREQWL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CGBPURREQWL
*  INTO TABLE @DATA(IT_CGBPURREQWL2).
*--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_CGBPURREQWL INDEX 1 INTO DATA(WA_CGBPURREQWL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CGBPURREQWL>-MANDT = 1.
<CGBPURREQWL>-PURCHASEREQUISITION = 1.
<CGBPURREQWL>-PURREQNDESCRIPTION = 1.
<CGBPURREQWL>-PURREQNLIFECYCLESTATUS = 1.
<CGBPURREQWL>-NUMBEROFITEMS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CGBPURREQWL-TOTALNETAMOUNT, sy-vline,
  WA_CGBPURREQWL-CURRENCY, sy-vline,
  WA_CGBPURREQWL-CREATIONDATE, sy-vline,
  WA_CGBPURREQWL-PURREQNSSPREQUESTOR, sy-vline,
  WA_CGBPURREQWL-EMPLOYEEFULLNAME, sy-vline,
  WA_CGBPURREQWL-PURREQNSSPAUTHOR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CGBPURREQWL 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_CGBPURREQWL 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_CGBPURREQWL INTO WA_CGBPURREQWL.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field FIXEDSUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CGBPURREQWL-FIXEDSUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CGBPURREQWL-FIXEDSUPPLIER.
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_CGBPURREQWL_STR, 
MANDT TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURREQNDESCRIPTION TYPE STRING,
PURREQNLIFECYCLESTATUS TYPE STRING,
NUMBEROFITEMS TYPE STRING,
TOTALNETAMOUNT TYPE STRING,
CURRENCY TYPE STRING,
CREATIONDATE TYPE STRING,
PURREQNSSPREQUESTOR TYPE STRING,
EMPLOYEEFULLNAME TYPE STRING,
PURREQNSSPAUTHOR TYPE STRING,
PURREQNLIFECYCLESTATUSNAME TYPE STRING,
BUSINESSUSER TYPE STRING,
PURCHASEREQUISITIONTYPE TYPE STRING,
ISONBEHALFCART TYPE STRING,
PURREQNISCREATEDINEXPERTMODE TYPE STRING,
PURREQNITEMLIFECYCLESTATUS TYPE STRING,
EXTERNALAPPROVALSTATUS TYPE STRING,
PURCHASEREQUISITIONITEMTEXT TYPE STRING,
MATERIAL TYPE STRING,
EXTMATERIALFORPURG TYPE STRING,
MATERIALNAME TYPE STRING,
SUPPLIER TYPE STRING,
EXTDESIREDSUPPLIERFORPURG TYPE STRING,
FIXEDSUPPLIER TYPE STRING,
ISEXTPURGSCENARIO TYPE STRING,
EXTPLANTFORPURG TYPE STRING,
SUPPLIERNAME TYPE STRING,
PLANT TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
EXTCOMPANYCODEFORPURG TYPE STRING,
COMPANYCODE TYPE STRING,
PROCUREMENTHUBSOURCESYSTEM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CGBPURREQWL_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_CGBPURREQWL_STR-MANDT sy-vline 
WA_CGBPURREQWL_STR-PURCHASEREQUISITION sy-vline 
WA_CGBPURREQWL_STR-PURREQNDESCRIPTION sy-vline 
WA_CGBPURREQWL_STR-PURREQNLIFECYCLESTATUS sy-vline 
WA_CGBPURREQWL_STR-NUMBEROFITEMS sy-vline 
WA_CGBPURREQWL_STR-TOTALNETAMOUNT sy-vline 
WA_CGBPURREQWL_STR-CURRENCY sy-vline 
WA_CGBPURREQWL_STR-CREATIONDATE sy-vline 
WA_CGBPURREQWL_STR-PURREQNSSPREQUESTOR sy-vline 
WA_CGBPURREQWL_STR-EMPLOYEEFULLNAME sy-vline 
WA_CGBPURREQWL_STR-PURREQNSSPAUTHOR sy-vline 
WA_CGBPURREQWL_STR-PURREQNLIFECYCLESTATUSNAME sy-vline 
WA_CGBPURREQWL_STR-BUSINESSUSER sy-vline 
WA_CGBPURREQWL_STR-PURCHASEREQUISITIONTYPE sy-vline 
WA_CGBPURREQWL_STR-ISONBEHALFCART sy-vline 
WA_CGBPURREQWL_STR-PURREQNISCREATEDINEXPERTMODE sy-vline 
WA_CGBPURREQWL_STR-PURREQNITEMLIFECYCLESTATUS sy-vline 
WA_CGBPURREQWL_STR-EXTERNALAPPROVALSTATUS sy-vline 
WA_CGBPURREQWL_STR-PURCHASEREQUISITIONITEMTEXT sy-vline 
WA_CGBPURREQWL_STR-MATERIAL sy-vline 
WA_CGBPURREQWL_STR-EXTMATERIALFORPURG sy-vline 
WA_CGBPURREQWL_STR-MATERIALNAME sy-vline 
WA_CGBPURREQWL_STR-SUPPLIER sy-vline 
WA_CGBPURREQWL_STR-EXTDESIREDSUPPLIERFORPURG sy-vline 
WA_CGBPURREQWL_STR-FIXEDSUPPLIER sy-vline 
WA_CGBPURREQWL_STR-ISEXTPURGSCENARIO sy-vline 
WA_CGBPURREQWL_STR-EXTPLANTFORPURG sy-vline 
WA_CGBPURREQWL_STR-SUPPLIERNAME sy-vline 
WA_CGBPURREQWL_STR-PLANT sy-vline 
WA_CGBPURREQWL_STR-PURCHASINGGROUP sy-vline 
WA_CGBPURREQWL_STR-PURCHASINGORGANIZATION sy-vline 
WA_CGBPURREQWL_STR-EXTCOMPANYCODEFORPURG sy-vline 
WA_CGBPURREQWL_STR-COMPANYCODE sy-vline 
WA_CGBPURREQWL_STR-PROCUREMENTHUBSOURCESYSTEM sy-vline      INTO ld_text SEPARATED BY SPACE.

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