ABAP Select data from SAP table ISUEXT_MAINT_UI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISUEXT_MAINT_UI
*  INTO TABLE @DATA(IT_ISUEXT_MAINT_UI2).
*--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_ISUEXT_MAINT_UI INDEX 1 INTO DATA(WA_ISUEXT_MAINT_UI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISUEXT_MAINT_UI>-DATA_UI = 1.
<ISUEXT_MAINT_UI>-CLIENT = 1.
<ISUEXT_MAINT_UI>-PRODUCT_GUID = 1.
<ISUEXT_MAINT_UI>-VALID_FROM = 1.
<ISUEXT_MAINT_UI>-VALID_TO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISUEXT_MAINT_UI-UPNAME, sy-vline,
  WA_ISUEXT_MAINT_UI-HISTEX, sy-vline,
  WA_ISUEXT_MAINT_UI-LOGSYS, sy-vline,
  WA_ISUEXT_MAINT_UI-ISUCONTR, sy-vline,
  WA_ISUEXT_MAINT_UI-ISUCONTR_DESC, sy-vline,
  WA_ISUEXT_MAINT_UI-ISULOGSYS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISUEXT_MAINT_UI 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_ISUEXT_MAINT_UI 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_ISUEXT_MAINT_UI INTO WA_ISUEXT_MAINT_UI.


*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 TSTPS, internal->external for field VALID_FROM
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_ISUEXT_MAINT_UI-VALID_FROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUEXT_MAINT_UI-VALID_FROM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field VALID_TO
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_ISUEXT_MAINT_UI-VALID_TO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUEXT_MAINT_UI-VALID_TO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISUEXT_MAINT_UI-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUEXT_MAINT_UI-LOGSYS.
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_ISUEXT_MAINT_UI_STR, 
DATA_UI TYPE STRING,
CLIENT TYPE STRING,
PRODUCT_GUID TYPE STRING,
VALID_FROM TYPE STRING,
VALID_TO TYPE STRING,
UPNAME TYPE STRING,
HISTEX TYPE STRING,
LOGSYS TYPE STRING,
ISUCONTR TYPE STRING,
ISUCONTR_DESC TYPE STRING,
ISULOGSYS TYPE STRING,
ISULOGSYS_DESC TYPE STRING,
NEXTITEM TYPE STRING,
NEXTITEM_DESC TYPE STRING,
RELPREV TYPE STRING,
RELPREV_DESC TYPE STRING,
PREVITEM TYPE STRING,
PREVITEM_DESC TYPE STRING,
RELNEXT TYPE STRING,
RELNEXT_DESC TYPE STRING,
RELITEM TYPE STRING,
RELITEM_DESC TYPE STRING,
BPNO TYPE STRING,
BPNO_DESC TYPE STRING,
BPGUID TYPE STRING,
BPGUID_DESC TYPE STRING,
BUAGGUID TYPE STRING,
BUAGGUID_DESC TYPE STRING,
PODGUID TYPE STRING,
PODGUID_DESC TYPE STRING,
CONTSTART TYPE STRING,
CONTSTART_DESC TYPE STRING,
CONTEND TYPE STRING,
CONTEND_DESC TYPE STRING,
CONTDUR TYPE STRING,
CONTDUR_DESC TYPE STRING,
VALIDFROM TYPE STRING,
VALIDFROM_DESC TYPE STRING,
VALIDTO TYPE STRING,
VALIDTO_DESC TYPE STRING,
QUOTATION TYPE STRING,
QUOTATION_DESC TYPE STRING,
CANCELLED TYPE STRING,
CANCELLED_DESC TYPE STRING,
BLOCKED TYPE STRING,
BLOCKED_DESC TYPE STRING,
DIVISION TYPE STRING,
DIVISION_DESC TYPE STRING,
DATA_X TYPE STRING,
ISUCONTR TYPE STRING,
ISULOGSYS TYPE STRING,
NEXTITEM TYPE STRING,
RELPREV TYPE STRING,
PREVITEM TYPE STRING,
RELNEXT TYPE STRING,
RELITEM TYPE STRING,
BPNO TYPE STRING,
BPGUID TYPE STRING,
BUAGGUID TYPE STRING,
PODGUID TYPE STRING,
CONTSTART TYPE STRING,
CONTEND TYPE STRING,
CONTDUR TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
QUOTATION TYPE STRING,
CANCELLED TYPE STRING,
BLOCKED TYPE STRING,
DIVISION TYPE STRING,
UPDATE_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISUEXT_MAINT_UI_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_ISUEXT_MAINT_UI_STR-DATA_UI sy-vline 
WA_ISUEXT_MAINT_UI_STR-CLIENT sy-vline 
WA_ISUEXT_MAINT_UI_STR-PRODUCT_GUID sy-vline 
WA_ISUEXT_MAINT_UI_STR-VALID_FROM sy-vline 
WA_ISUEXT_MAINT_UI_STR-VALID_TO sy-vline 
WA_ISUEXT_MAINT_UI_STR-UPNAME sy-vline 
WA_ISUEXT_MAINT_UI_STR-HISTEX sy-vline 
WA_ISUEXT_MAINT_UI_STR-LOGSYS sy-vline 
WA_ISUEXT_MAINT_UI_STR-ISUCONTR sy-vline 
WA_ISUEXT_MAINT_UI_STR-ISUCONTR_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-ISULOGSYS sy-vline 
WA_ISUEXT_MAINT_UI_STR-ISULOGSYS_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-NEXTITEM sy-vline 
WA_ISUEXT_MAINT_UI_STR-NEXTITEM_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-RELPREV sy-vline 
WA_ISUEXT_MAINT_UI_STR-RELPREV_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-PREVITEM sy-vline 
WA_ISUEXT_MAINT_UI_STR-PREVITEM_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-RELNEXT sy-vline 
WA_ISUEXT_MAINT_UI_STR-RELNEXT_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-RELITEM sy-vline 
WA_ISUEXT_MAINT_UI_STR-RELITEM_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-BPNO sy-vline 
WA_ISUEXT_MAINT_UI_STR-BPNO_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-BPGUID sy-vline 
WA_ISUEXT_MAINT_UI_STR-BPGUID_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-BUAGGUID sy-vline 
WA_ISUEXT_MAINT_UI_STR-BUAGGUID_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-PODGUID sy-vline 
WA_ISUEXT_MAINT_UI_STR-PODGUID_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-CONTSTART sy-vline 
WA_ISUEXT_MAINT_UI_STR-CONTSTART_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-CONTEND sy-vline 
WA_ISUEXT_MAINT_UI_STR-CONTEND_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-CONTDUR sy-vline 
WA_ISUEXT_MAINT_UI_STR-CONTDUR_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-VALIDFROM sy-vline 
WA_ISUEXT_MAINT_UI_STR-VALIDFROM_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-VALIDTO sy-vline 
WA_ISUEXT_MAINT_UI_STR-VALIDTO_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-QUOTATION sy-vline 
WA_ISUEXT_MAINT_UI_STR-QUOTATION_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-CANCELLED sy-vline 
WA_ISUEXT_MAINT_UI_STR-CANCELLED_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-BLOCKED sy-vline 
WA_ISUEXT_MAINT_UI_STR-BLOCKED_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-DIVISION sy-vline 
WA_ISUEXT_MAINT_UI_STR-DIVISION_DESC sy-vline 
WA_ISUEXT_MAINT_UI_STR-DATA_X sy-vline 
WA_ISUEXT_MAINT_UI_STR-ISUCONTR sy-vline 
WA_ISUEXT_MAINT_UI_STR-ISULOGSYS sy-vline 
WA_ISUEXT_MAINT_UI_STR-NEXTITEM sy-vline 
WA_ISUEXT_MAINT_UI_STR-RELPREV sy-vline 
WA_ISUEXT_MAINT_UI_STR-PREVITEM sy-vline 
WA_ISUEXT_MAINT_UI_STR-RELNEXT sy-vline 
WA_ISUEXT_MAINT_UI_STR-RELITEM sy-vline 
WA_ISUEXT_MAINT_UI_STR-BPNO sy-vline 
WA_ISUEXT_MAINT_UI_STR-BPGUID sy-vline 
WA_ISUEXT_MAINT_UI_STR-BUAGGUID sy-vline 
WA_ISUEXT_MAINT_UI_STR-PODGUID sy-vline 
WA_ISUEXT_MAINT_UI_STR-CONTSTART sy-vline 
WA_ISUEXT_MAINT_UI_STR-CONTEND sy-vline 
WA_ISUEXT_MAINT_UI_STR-CONTDUR sy-vline 
WA_ISUEXT_MAINT_UI_STR-VALIDFROM sy-vline 
WA_ISUEXT_MAINT_UI_STR-VALIDTO sy-vline 
WA_ISUEXT_MAINT_UI_STR-QUOTATION sy-vline 
WA_ISUEXT_MAINT_UI_STR-CANCELLED sy-vline 
WA_ISUEXT_MAINT_UI_STR-BLOCKED sy-vline 
WA_ISUEXT_MAINT_UI_STR-DIVISION sy-vline 
WA_ISUEXT_MAINT_UI_STR-UPDATE_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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