ABAP Select data from SAP table IMPISSCHGACTY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMPISSCHGACTY
*  INTO TABLE @DATA(IT_IMPISSCHGACTY2).
*--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_IMPISSCHGACTY INDEX 1 INTO DATA(WA_IMPISSCHGACTY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMPISSCHGACTY>-MANDT = 1.
<IMPISSCHGACTY>-ACTIVITYUUID = 1.
<IMPISSCHGACTY>-MSTRPROJACTIVITYID = 1.
<IMPISSCHGACTY>-ISSUETYPE = 1.
<IMPISSCHGACTY>-ACTIVITYTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMPISSCHGACTY-MSTRPROJCHKLSTPRIOCODE, sy-vline,
  WA_IMPISSCHGACTY-MSTRPROJCHKLSTRSNCODE, sy-vline,
  WA_IMPISSCHGACTY-STATUS, sy-vline,
  WA_IMPISSCHGACTY-LASTCHANGEDBYUSER, sy-vline,
  WA_IMPISSCHGACTY-CREATEDBYUSER, sy-vline,
  WA_IMPISSCHGACTY-CREATEDBYUSERFULLNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMPISSCHGACTY 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_IMPISSCHGACTY 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_IMPISSCHGACTY INTO WA_IMPISSCHGACTY.


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

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

*Conversion exit ALPHA, internal->external for field BUSINESSPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IMPISSCHGACTY-BUSINESSPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMPISSCHGACTY-BUSINESSPARTNER.
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_IMPISSCHGACTY_STR, 
MANDT TYPE STRING,
ACTIVITYUUID TYPE STRING,
MSTRPROJACTIVITYID TYPE STRING,
ISSUETYPE TYPE STRING,
ACTIVITYTYPE TYPE STRING,
MSTRPROJCHKLSTPRIOCODE TYPE STRING,
MSTRPROJCHKLSTRSNCODE TYPE STRING,
STATUS TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATEDBYUSERFULLNAME TYPE STRING,
LASTCHANGEDBYUSERFULLNAME TYPE STRING,
CHANGEDDATE TYPE STRING,
CREATIONDATE TYPE STRING,
CREATIONDATETIME TYPE STRING,
CHANGEDONDATETIME TYPE STRING,
CONDITIONISMANDATORY TYPE STRING,
ISPROPOSAL TYPE STRING,
MSTRPROJACTIVITYCATEGORY TYPE STRING,
ORIGINAPPLICATION TYPE STRING,
ISSUECATEGORY TYPE STRING,
CHANGERECORDUUID TYPE STRING,
ACTIVITYNAME TYPE STRING,
REFERENCEDOCUMENT TYPE STRING,
REFERENCEDOCUMENTDESC TYPE STRING,
MASTERPROJECT TYPE STRING,
MASTERPROJECTUUID TYPE STRING,
MASTERPROJECTNAME TYPE STRING,
MASTERPROJECTTYPE TYPE STRING,
MASTERPROJECTISCONFIDENTIAL TYPE STRING,
MASTERPROJECTORGANIZATION TYPE STRING,
PLANNEDSTARTDATE TYPE STRING,
PLANNEDENDDATE TYPE STRING,
ACTUALSTARTDATE TYPE STRING,
ACTUALENDDATE TYPE STRING,
ISCOMPLETED TYPE STRING,
CHGMGMTREQDESCRIPTIONTEXT TYPE STRING,
BUSINESSPARTNERFULLNAME TYPE STRING,
PARTNERUUID TYPE STRING,
BUSINESSPARTNER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMPISSCHGACTY_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_IMPISSCHGACTY_STR-MANDT sy-vline 
WA_IMPISSCHGACTY_STR-ACTIVITYUUID sy-vline 
WA_IMPISSCHGACTY_STR-MSTRPROJACTIVITYID sy-vline 
WA_IMPISSCHGACTY_STR-ISSUETYPE sy-vline 
WA_IMPISSCHGACTY_STR-ACTIVITYTYPE sy-vline 
WA_IMPISSCHGACTY_STR-MSTRPROJCHKLSTPRIOCODE sy-vline 
WA_IMPISSCHGACTY_STR-MSTRPROJCHKLSTRSNCODE sy-vline 
WA_IMPISSCHGACTY_STR-STATUS sy-vline 
WA_IMPISSCHGACTY_STR-LASTCHANGEDBYUSER sy-vline 
WA_IMPISSCHGACTY_STR-CREATEDBYUSER sy-vline 
WA_IMPISSCHGACTY_STR-CREATEDBYUSERFULLNAME sy-vline 
WA_IMPISSCHGACTY_STR-LASTCHANGEDBYUSERFULLNAME sy-vline 
WA_IMPISSCHGACTY_STR-CHANGEDDATE sy-vline 
WA_IMPISSCHGACTY_STR-CREATIONDATE sy-vline 
WA_IMPISSCHGACTY_STR-CREATIONDATETIME sy-vline 
WA_IMPISSCHGACTY_STR-CHANGEDONDATETIME sy-vline 
WA_IMPISSCHGACTY_STR-CONDITIONISMANDATORY sy-vline 
WA_IMPISSCHGACTY_STR-ISPROPOSAL sy-vline 
WA_IMPISSCHGACTY_STR-MSTRPROJACTIVITYCATEGORY sy-vline 
WA_IMPISSCHGACTY_STR-ORIGINAPPLICATION sy-vline 
WA_IMPISSCHGACTY_STR-ISSUECATEGORY sy-vline 
WA_IMPISSCHGACTY_STR-CHANGERECORDUUID sy-vline 
WA_IMPISSCHGACTY_STR-ACTIVITYNAME sy-vline 
WA_IMPISSCHGACTY_STR-REFERENCEDOCUMENT sy-vline 
WA_IMPISSCHGACTY_STR-REFERENCEDOCUMENTDESC sy-vline 
WA_IMPISSCHGACTY_STR-MASTERPROJECT sy-vline 
WA_IMPISSCHGACTY_STR-MASTERPROJECTUUID sy-vline 
WA_IMPISSCHGACTY_STR-MASTERPROJECTNAME sy-vline 
WA_IMPISSCHGACTY_STR-MASTERPROJECTTYPE sy-vline 
WA_IMPISSCHGACTY_STR-MASTERPROJECTISCONFIDENTIAL sy-vline 
WA_IMPISSCHGACTY_STR-MASTERPROJECTORGANIZATION sy-vline 
WA_IMPISSCHGACTY_STR-PLANNEDSTARTDATE sy-vline 
WA_IMPISSCHGACTY_STR-PLANNEDENDDATE sy-vline 
WA_IMPISSCHGACTY_STR-ACTUALSTARTDATE sy-vline 
WA_IMPISSCHGACTY_STR-ACTUALENDDATE sy-vline 
WA_IMPISSCHGACTY_STR-ISCOMPLETED sy-vline 
WA_IMPISSCHGACTY_STR-CHGMGMTREQDESCRIPTIONTEXT sy-vline 
WA_IMPISSCHGACTY_STR-BUSINESSPARTNERFULLNAME sy-vline 
WA_IMPISSCHGACTY_STR-PARTNERUUID sy-vline 
WA_IMPISSCHGACTY_STR-BUSINESSPARTNER sy-vline      INTO ld_text SEPARATED BY SPACE.

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