ABAP Select data from SAP table PURREQNITMATTRIB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PURREQNITMATTRIB
*  INTO TABLE @DATA(IT_PURREQNITMATTRIB2).
*--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_PURREQNITMATTRIB INDEX 1 INTO DATA(WA_PURREQNITMATTRIB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PURREQNITMATTRIB>-MANDT = 1.
<PURREQNITMATTRIB>-UI5NETWORKGRAPHATTRIBUTEVALUE = 1.
<PURREQNITMATTRIB>-UI5NETWORKGRAPHATTRIBITEMVALUE = 1.
<PURREQNITMATTRIB>-PRODUCT = 1.
<PURREQNITMATTRIB>-REQUESTEDQUANTITY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PURREQNITMATTRIB-DELIVERYDATE, sy-vline,
  WA_PURREQNITMATTRIB-BASEUNIT, sy-vline,
  WA_PURREQNITMATTRIB-UI5NETWORKGRAPHSTATUS, sy-vline,
  WA_PURREQNITMATTRIB-UI5NETWORKGRAPHSTATUSNAME, sy-vline,
  WA_PURREQNITMATTRIB-UI5NETWORKGRAPHDESCRIPTIONNAME, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_PURREQNITMATTRIB 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_PURREQNITMATTRIB 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_PURREQNITMATTRIB INTO WA_PURREQNITMATTRIB.


*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 UI5NETWORKGRAPHATTRIBUTEVALUE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PURREQNITMATTRIB-UI5NETWORKGRAPHATTRIBUTEVALUE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PURREQNITMATTRIB-UI5NETWORKGRAPHATTRIBUTEVALUE.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field BASEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PURREQNITMATTRIB-BASEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PURREQNITMATTRIB-BASEUNIT.
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_PURREQNITMATTRIB_STR, 
MANDT TYPE STRING,
UI5NETWORKGRAPHATTRIBUTEVALUE TYPE STRING,
UI5NETWORKGRAPHATTRIBITEMVALUE TYPE STRING,
PRODUCT TYPE STRING,
REQUESTEDQUANTITY TYPE STRING,
DELIVERYDATE TYPE STRING,
BASEUNIT TYPE STRING,
UI5NETWORKGRAPHSTATUS TYPE STRING,
UI5NETWORKGRAPHSTATUSNAME TYPE STRING,
UI5NETWORKGRAPHDESCRIPTIONNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PURREQNITMATTRIB_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_PURREQNITMATTRIB_STR-MANDT sy-vline 
WA_PURREQNITMATTRIB_STR-UI5NETWORKGRAPHATTRIBUTEVALUE sy-vline 
WA_PURREQNITMATTRIB_STR-UI5NETWORKGRAPHATTRIBITEMVALUE sy-vline 
WA_PURREQNITMATTRIB_STR-PRODUCT sy-vline 
WA_PURREQNITMATTRIB_STR-REQUESTEDQUANTITY sy-vline 
WA_PURREQNITMATTRIB_STR-DELIVERYDATE sy-vline 
WA_PURREQNITMATTRIB_STR-BASEUNIT sy-vline 
WA_PURREQNITMATTRIB_STR-UI5NETWORKGRAPHSTATUS sy-vline 
WA_PURREQNITMATTRIB_STR-UI5NETWORKGRAPHSTATUSNAME sy-vline 
WA_PURREQNITMATTRIB_STR-UI5NETWORKGRAPHDESCRIPTIONNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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