ABAP Select data from SAP table PPURREQN1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PPURREQN1 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 PPURREQN1. 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 PPURREQN1 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_PPURREQN1 TYPE STANDARD TABLE OF PPURREQN1,
      WA_PPURREQN1 TYPE PPURREQN1,
      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: <PPURREQN1> TYPE PPURREQN1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PPURREQN1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PPURREQN1
  INTO TABLE IT_PPURREQN1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PPURREQN1
*  INTO TABLE @DATA(IT_PPURREQN12).
*--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_PPURREQN1 INDEX 1 INTO DATA(WA_PPURREQN12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PPURREQN1 ASSIGNING <PPURREQN1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PPURREQN1>-MANDT = 1.
<PPURREQN1>-PURCHASEREQUISITION = 1.
<PPURREQN1>-PURCHASEREQUISITIONITEM = 1.
<PPURREQN1>-PURCHASEREQUISITIONTYPE = 1.
<PPURREQN1>-SAPCLIENT = 1.

ENDLOOP.

LOOP AT IT_PPURREQN1 INTO WA_PPURREQN1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PPURREQN1-PURCHASEREQUISITIONITEMKEY, sy-vline,
  WA_PPURREQN1-PURCHASINGDOCUMENT, sy-vline,
  WA_PPURREQN1-PURCHASINGDOCUMENTITEM, sy-vline,
  WA_PPURREQN1-PURREQNRELEASESTATUS, sy-vline,
  WA_PPURREQN1-MATERIALGROUP, sy-vline,
  WA_PPURREQN1-MATERIAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PPURREQN1 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_PPURREQN1 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_PPURREQN1 INTO WA_PPURREQN1.


*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_PPURREQN1-PURCHASEREQUISITION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PPURREQN1-PURCHASEREQUISITION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PURCHASINGDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PPURREQN1-PURCHASINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PPURREQN1-PURCHASINGDOCUMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_PPURREQN1-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PPURREQN1-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FIXEDSUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PPURREQN1-FIXEDSUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PPURREQN1-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_PPURREQN1_STR, 
MANDT TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURCHASEREQUISITIONITEM TYPE STRING,
PURCHASEREQUISITIONTYPE TYPE STRING,
SAPCLIENT TYPE STRING,
PURCHASEREQUISITIONITEMKEY TYPE STRING,
PURCHASINGDOCUMENT TYPE STRING,
PURCHASINGDOCUMENTITEM TYPE STRING,
PURREQNRELEASESTATUS TYPE STRING,
MATERIALGROUP TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
RELEASECODE TYPE STRING,
PURCHASEREQUISITIONSTATUS TYPE STRING,
RELEASESTRATEGY TYPE STRING,
PURREQNORIGIN TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURREQNSSPCATALOG TYPE STRING,
COMPANYCODE TYPE STRING,
FIXEDSUPPLIER TYPE STRING,
CALENDARYEAR TYPE STRING,
CALENDARQUARTER TYPE STRING,
CALENDARMONTH TYPE STRING,
CALENDARWEEK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PPURREQN1_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_PPURREQN1_STR-MANDT sy-vline 
WA_PPURREQN1_STR-PURCHASEREQUISITION sy-vline 
WA_PPURREQN1_STR-PURCHASEREQUISITIONITEM sy-vline 
WA_PPURREQN1_STR-PURCHASEREQUISITIONTYPE sy-vline 
WA_PPURREQN1_STR-SAPCLIENT sy-vline 
WA_PPURREQN1_STR-PURCHASEREQUISITIONITEMKEY sy-vline 
WA_PPURREQN1_STR-PURCHASINGDOCUMENT sy-vline 
WA_PPURREQN1_STR-PURCHASINGDOCUMENTITEM sy-vline 
WA_PPURREQN1_STR-PURREQNRELEASESTATUS sy-vline 
WA_PPURREQN1_STR-MATERIALGROUP sy-vline 
WA_PPURREQN1_STR-MATERIAL sy-vline 
WA_PPURREQN1_STR-PLANT sy-vline 
WA_PPURREQN1_STR-CREATEDBYUSER sy-vline 
WA_PPURREQN1_STR-CREATIONDATE sy-vline 
WA_PPURREQN1_STR-RELEASECODE sy-vline 
WA_PPURREQN1_STR-PURCHASEREQUISITIONSTATUS sy-vline 
WA_PPURREQN1_STR-RELEASESTRATEGY sy-vline 
WA_PPURREQN1_STR-PURREQNORIGIN sy-vline 
WA_PPURREQN1_STR-PURCHASINGGROUP sy-vline 
WA_PPURREQN1_STR-PURCHASINGORGANIZATION sy-vline 
WA_PPURREQN1_STR-PURREQNSSPCATALOG sy-vline 
WA_PPURREQN1_STR-COMPANYCODE sy-vline 
WA_PPURREQN1_STR-FIXEDSUPPLIER sy-vline 
WA_PPURREQN1_STR-CALENDARYEAR sy-vline 
WA_PPURREQN1_STR-CALENDARQUARTER sy-vline 
WA_PPURREQN1_STR-CALENDARMONTH sy-vline 
WA_PPURREQN1_STR-CALENDARWEEK sy-vline      INTO ld_text SEPARATED BY SPACE.

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