ABAP Select data from SAP table PPREQNAVGAPPRVL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PPREQNAVGAPPRVL
*  INTO TABLE @DATA(IT_PPREQNAVGAPPRVL2).
*--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_PPREQNAVGAPPRVL INDEX 1 INTO DATA(WA_PPREQNAVGAPPRVL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PPREQNAVGAPPRVL>-MANDT = 1.
<PPREQNAVGAPPRVL>-PURCHASEREQUISITION = 1.
<PPREQNAVGAPPRVL>-PURCHASEREQUISITIONITEM = 1.
<PPREQNAVGAPPRVL>-ACCOUNTASSIGNMENTNUMBER = 1.
<PPREQNAVGAPPRVL>-PURCHASINGGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PPREQNAVGAPPRVL-PURCHASINGORGANIZATION, sy-vline,
  WA_PPREQNAVGAPPRVL-COSTCENTER, sy-vline,
  WA_PPREQNAVGAPPRVL-SUPPLIER, sy-vline,
  WA_PPREQNAVGAPPRVL-SUPPLIERCOUNTRY, sy-vline,
  WA_PPREQNAVGAPPRVL-ACCOUNTASSIGNMENTCATEGORY, sy-vline,
  WA_PPREQNAVGAPPRVL-MATERIAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PPREQNAVGAPPRVL 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_PPREQNAVGAPPRVL 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_PPREQNAVGAPPRVL INTO WA_PPREQNAVGAPPRVL.


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

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

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_PPREQNAVGAPPRVL-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PPREQNAVGAPPRVL-MATERIAL.
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_PPREQNAVGAPPRVL_STR, 
MANDT TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURCHASEREQUISITIONITEM TYPE STRING,
ACCOUNTASSIGNMENTNUMBER TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
COSTCENTER TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERCOUNTRY TYPE STRING,
ACCOUNTASSIGNMENTCATEGORY TYPE STRING,
MATERIAL TYPE STRING,
MATERIALGROUP TYPE STRING,
PLANT TYPE STRING,
RELEASECODE TYPE STRING,
PURCHASEREQUISITIONSTATUS TYPE STRING,
RELEASESTRATEGY TYPE STRING,
CREATEDBYUSER TYPE STRING,
PURCHASEREQUISITIONTYPE TYPE STRING,
PURCHASEREQUISITIONPRICE TYPE STRING,
PURREQCREATIONDATE TYPE STRING,
CREATIONDATE TYPE STRING,
CALENDARWEEK TYPE STRING,
CALENDARMONTH TYPE STRING,
CALENDARQUARTER TYPE STRING,
CALENDARYEAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PPREQNAVGAPPRVL_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_PPREQNAVGAPPRVL_STR-MANDT sy-vline 
WA_PPREQNAVGAPPRVL_STR-PURCHASEREQUISITION sy-vline 
WA_PPREQNAVGAPPRVL_STR-PURCHASEREQUISITIONITEM sy-vline 
WA_PPREQNAVGAPPRVL_STR-ACCOUNTASSIGNMENTNUMBER sy-vline 
WA_PPREQNAVGAPPRVL_STR-PURCHASINGGROUP sy-vline 
WA_PPREQNAVGAPPRVL_STR-PURCHASINGORGANIZATION sy-vline 
WA_PPREQNAVGAPPRVL_STR-COSTCENTER sy-vline 
WA_PPREQNAVGAPPRVL_STR-SUPPLIER sy-vline 
WA_PPREQNAVGAPPRVL_STR-SUPPLIERCOUNTRY sy-vline 
WA_PPREQNAVGAPPRVL_STR-ACCOUNTASSIGNMENTCATEGORY sy-vline 
WA_PPREQNAVGAPPRVL_STR-MATERIAL sy-vline 
WA_PPREQNAVGAPPRVL_STR-MATERIALGROUP sy-vline 
WA_PPREQNAVGAPPRVL_STR-PLANT sy-vline 
WA_PPREQNAVGAPPRVL_STR-RELEASECODE sy-vline 
WA_PPREQNAVGAPPRVL_STR-PURCHASEREQUISITIONSTATUS sy-vline 
WA_PPREQNAVGAPPRVL_STR-RELEASESTRATEGY sy-vline 
WA_PPREQNAVGAPPRVL_STR-CREATEDBYUSER sy-vline 
WA_PPREQNAVGAPPRVL_STR-PURCHASEREQUISITIONTYPE sy-vline 
WA_PPREQNAVGAPPRVL_STR-PURCHASEREQUISITIONPRICE sy-vline 
WA_PPREQNAVGAPPRVL_STR-PURREQCREATIONDATE sy-vline 
WA_PPREQNAVGAPPRVL_STR-CREATIONDATE sy-vline 
WA_PPREQNAVGAPPRVL_STR-CALENDARWEEK sy-vline 
WA_PPREQNAVGAPPRVL_STR-CALENDARMONTH sy-vline 
WA_PPREQNAVGAPPRVL_STR-CALENDARQUARTER sy-vline 
WA_PPREQNAVGAPPRVL_STR-CALENDARYEAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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