ABAP Select data from SAP table IPMRPRQMTB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IPMRPRQMTB
*  INTO TABLE @DATA(IT_IPMRPRQMTB2).
*--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_IPMRPRQMTB INDEX 1 INTO DATA(WA_IPMRPRQMTB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IPMRPRQMTB>-MANDT = 1.
<IPMRPRQMTB>-PMRPSIMULATION = 1.
<IPMRPRQMTB>-REQUIREMENTINTERNALID = 1.
<IPMRPRQMTB>-PRODUCT = 1.
<IPMRPRQMTB>-PLANT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IPMRPRQMTB-MRPAREA, sy-vline,
  WA_IPMRPRQMTB-PMRPREQUIREMENTCATEGORY, sy-vline,
  WA_IPMRPRQMTB-REQUIREMENTSTARTDATE, sy-vline,
  WA_IPMRPRQMTB-REQUIREMENTENDDATE, sy-vline,
  WA_IPMRPRQMTB-REQUIREDQUANTITY, sy-vline,
  WA_IPMRPRQMTB-PMRPOPENQUANTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IPMRPRQMTB 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_IPMRPRQMTB 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_IPMRPRQMTB INTO WA_IPMRPRQMTB.


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

*Conversion exit CUNIT, internal->external for field UNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IPMRPRQMTB-UNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IPMRPRQMTB-UNITOFMEASURE.
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_IPMRPRQMTB_STR, 
MANDT TYPE STRING,
PMRPSIMULATION TYPE STRING,
REQUIREMENTINTERNALID TYPE STRING,
PRODUCT TYPE STRING,
PLANT TYPE STRING,
MRPAREA TYPE STRING,
PMRPREQUIREMENTCATEGORY TYPE STRING,
REQUIREMENTSTARTDATE TYPE STRING,
REQUIREMENTENDDATE TYPE STRING,
REQUIREDQUANTITY TYPE STRING,
PMRPOPENQUANTITY TYPE STRING,
AVAILABLESTOCKQUANTITY TYPE STRING,
COVEREDBYSTOCKQUANTITY TYPE STRING,
UNITOFMEASURE TYPE STRING,
RECEIPTINTERNALID TYPE STRING,
TOPLEVELDEMANDINTERNALID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IPMRPRQMTB_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_IPMRPRQMTB_STR-MANDT sy-vline 
WA_IPMRPRQMTB_STR-PMRPSIMULATION sy-vline 
WA_IPMRPRQMTB_STR-REQUIREMENTINTERNALID sy-vline 
WA_IPMRPRQMTB_STR-PRODUCT sy-vline 
WA_IPMRPRQMTB_STR-PLANT sy-vline 
WA_IPMRPRQMTB_STR-MRPAREA sy-vline 
WA_IPMRPRQMTB_STR-PMRPREQUIREMENTCATEGORY sy-vline 
WA_IPMRPRQMTB_STR-REQUIREMENTSTARTDATE sy-vline 
WA_IPMRPRQMTB_STR-REQUIREMENTENDDATE sy-vline 
WA_IPMRPRQMTB_STR-REQUIREDQUANTITY sy-vline 
WA_IPMRPRQMTB_STR-PMRPOPENQUANTITY sy-vline 
WA_IPMRPRQMTB_STR-AVAILABLESTOCKQUANTITY sy-vline 
WA_IPMRPRQMTB_STR-COVEREDBYSTOCKQUANTITY sy-vline 
WA_IPMRPRQMTB_STR-UNITOFMEASURE sy-vline 
WA_IPMRPRQMTB_STR-RECEIPTINTERNALID sy-vline 
WA_IPMRPRQMTB_STR-TOPLEVELDEMANDINTERNALID sy-vline      INTO ld_text SEPARATED BY SPACE.

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