ABAP Select data from SAP table IMPEOAINST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMPEOAINST
*  INTO TABLE @DATA(IT_IMPEOAINST2).
*--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_IMPEOAINST INDEX 1 INTO DATA(WA_IMPEOAINST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMPEOAINST>-MANDT = 1.
<IMPEOAINST>-OPACTYNTWKINSTANCE = 1.
<IMPEOAINST>-OPACTYNTWKELEMENT = 1.
<IMPEOAINST>-STATUSANDACTIONSCHEMA = 1.
<IMPEOAINST>-OPPLANNEDYIELDQUANTITY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMPEOAINST-OPPLANNEDSCRAPQUANTITY, sy-vline,
  WA_IMPEOAINST-PRODUCTIONUNIT, sy-vline,
  WA_IMPEOAINST-OPACTYEXPDEXECDURNINSECONDS, sy-vline,
  WA_IMPEOAINST-OPACTYEXPDEXECLABORDURNINSECS, sy-vline,
  WA_IMPEOAINST-BILLOFOPERATIONSTYPE, sy-vline,
  WA_IMPEOAINST-BILLOFOPERATIONSGROUP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMPEOAINST 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_IMPEOAINST 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_IMPEOAINST INTO WA_IMPEOAINST.


*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 CUNIT, internal->external for field PRODUCTIONUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IMPEOAINST-PRODUCTIONUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMPEOAINST-PRODUCTIONUNIT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field BILLOFOPERATIONSVERSION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IMPEOAINST-BILLOFOPERATIONSVERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMPEOAINST-BILLOFOPERATIONSVERSION.
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_IMPEOAINST_STR, 
MANDT TYPE STRING,
OPACTYNTWKINSTANCE TYPE STRING,
OPACTYNTWKELEMENT TYPE STRING,
STATUSANDACTIONSCHEMA TYPE STRING,
OPPLANNEDYIELDQUANTITY TYPE STRING,
OPPLANNEDSCRAPQUANTITY TYPE STRING,
PRODUCTIONUNIT TYPE STRING,
OPACTYEXPDEXECDURNINSECONDS TYPE STRING,
OPACTYEXPDEXECLABORDURNINSECS TYPE STRING,
BILLOFOPERATIONSTYPE TYPE STRING,
BILLOFOPERATIONSGROUP TYPE STRING,
BILLOFOPERATIONSVARIANT TYPE STRING,
BOOOPERATIONINTERNALID TYPE STRING,
BILLOFOPERATIONSVERSION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMPEOAINST_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_IMPEOAINST_STR-MANDT sy-vline 
WA_IMPEOAINST_STR-OPACTYNTWKINSTANCE sy-vline 
WA_IMPEOAINST_STR-OPACTYNTWKELEMENT sy-vline 
WA_IMPEOAINST_STR-STATUSANDACTIONSCHEMA sy-vline 
WA_IMPEOAINST_STR-OPPLANNEDYIELDQUANTITY sy-vline 
WA_IMPEOAINST_STR-OPPLANNEDSCRAPQUANTITY sy-vline 
WA_IMPEOAINST_STR-PRODUCTIONUNIT sy-vline 
WA_IMPEOAINST_STR-OPACTYEXPDEXECDURNINSECONDS sy-vline 
WA_IMPEOAINST_STR-OPACTYEXPDEXECLABORDURNINSECS sy-vline 
WA_IMPEOAINST_STR-BILLOFOPERATIONSTYPE sy-vline 
WA_IMPEOAINST_STR-BILLOFOPERATIONSGROUP sy-vline 
WA_IMPEOAINST_STR-BILLOFOPERATIONSVARIANT sy-vline 
WA_IMPEOAINST_STR-BOOOPERATIONINTERNALID sy-vline 
WA_IMPEOAINST_STR-BILLOFOPERATIONSVERSION sy-vline      INTO ld_text SEPARATED BY SPACE.

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