ABAP Select data from SAP table IMPEOANINST into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMPEOANINST
*  INTO TABLE @DATA(IT_IMPEOANINST2).
*--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_IMPEOANINST INDEX 1 INTO DATA(WA_IMPEOANINST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMPEOANINST>-MANDT = 1.
<IMPEOANINST>-OPACTYNTWKINSTANCE = 1.
<IMPEOANINST>-OPERATIONACTIVITYNETWORK = 1.
<IMPEOANINST>-OPACTYNTWKVERSIONCOUNTER = 1.
<IMPEOANINST>-MANUFACTURINGORDER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMPEOANINST-ORDERINTERNALID, sy-vline,
  WA_IMPEOANINST-ORDEROPERATIONINTERNALID, sy-vline,
  WA_IMPEOANINST-OPACTYCONFISSFIBASED, sy-vline,
  WA_IMPEOANINST-OPACTYCONFIRMATIONISALLOWED, sy-vline,
  WA_IMPEOANINST-OPACTYCONFNOTALLOWEDREASON, sy-vline,
  WA_IMPEOANINST-OPACTYNTWKSEGMENTTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMPEOANINST 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_IMPEOANINST 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_IMPEOANINST INTO WA_IMPEOANINST.


*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 MANUFACTURINGORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IMPEOANINST-MANUFACTURINGORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMPEOANINST-MANUFACTURINGORDER.
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_IMPEOANINST_STR, 
MANDT TYPE STRING,
OPACTYNTWKINSTANCE TYPE STRING,
OPERATIONACTIVITYNETWORK TYPE STRING,
OPACTYNTWKVERSIONCOUNTER TYPE STRING,
MANUFACTURINGORDER TYPE STRING,
ORDERINTERNALID TYPE STRING,
ORDEROPERATIONINTERNALID TYPE STRING,
OPACTYCONFISSFIBASED TYPE STRING,
OPACTYCONFIRMATIONISALLOWED TYPE STRING,
OPACTYCONFNOTALLOWEDREASON TYPE STRING,
OPACTYNTWKSEGMENTTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMPEOANINST_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_IMPEOANINST_STR-MANDT sy-vline 
WA_IMPEOANINST_STR-OPACTYNTWKINSTANCE sy-vline 
WA_IMPEOANINST_STR-OPERATIONACTIVITYNETWORK sy-vline 
WA_IMPEOANINST_STR-OPACTYNTWKVERSIONCOUNTER sy-vline 
WA_IMPEOANINST_STR-MANUFACTURINGORDER sy-vline 
WA_IMPEOANINST_STR-ORDERINTERNALID sy-vline 
WA_IMPEOANINST_STR-ORDEROPERATIONINTERNALID sy-vline 
WA_IMPEOANINST_STR-OPACTYCONFISSFIBASED sy-vline 
WA_IMPEOANINST_STR-OPACTYCONFIRMATIONISALLOWED sy-vline 
WA_IMPEOANINST_STR-OPACTYCONFNOTALLOWEDREASON sy-vline 
WA_IMPEOANINST_STR-OPACTYNTWKSEGMENTTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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