ABAP Select data from SAP table ISUEXTH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISUEXTH
*  INTO TABLE @DATA(IT_ISUEXTH2).
*--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_ISUEXTH INDEX 1 INTO DATA(WA_ISUEXTH2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISUEXTH-LOGSYS, sy-vline,
  WA_ISUEXTH-UPDATE_TYPE, sy-vline,
  WA_ISUEXTH-ISUCONTR, sy-vline,
  WA_ISUEXTH-ISULOGSYS, sy-vline,
  WA_ISUEXTH-NEXTITEM, sy-vline,
  WA_ISUEXTH-RELPREV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISUEXTH 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_ISUEXTH 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_ISUEXTH INTO WA_ISUEXTH.


*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_TO
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_ISUEXTH-VALID_TO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUEXTH-VALID_TO.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field BPNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISUEXTH-BPNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUEXTH-BPNO.
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_ISUEXTH_STR, 
CLIENT TYPE STRING,
PRODUCT_GUID TYPE STRING,
VALID_TO TYPE STRING,
VALID_FROM TYPE STRING,
UPNAME TYPE STRING,
LOGSYS TYPE STRING,
UPDATE_TYPE 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,
CANDI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISUEXTH_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_ISUEXTH_STR-CLIENT sy-vline 
WA_ISUEXTH_STR-PRODUCT_GUID sy-vline 
WA_ISUEXTH_STR-VALID_TO sy-vline 
WA_ISUEXTH_STR-VALID_FROM sy-vline 
WA_ISUEXTH_STR-UPNAME sy-vline 
WA_ISUEXTH_STR-LOGSYS sy-vline 
WA_ISUEXTH_STR-UPDATE_TYPE sy-vline 
WA_ISUEXTH_STR-ISUCONTR sy-vline 
WA_ISUEXTH_STR-ISULOGSYS sy-vline 
WA_ISUEXTH_STR-NEXTITEM sy-vline 
WA_ISUEXTH_STR-RELPREV sy-vline 
WA_ISUEXTH_STR-PREVITEM sy-vline 
WA_ISUEXTH_STR-RELNEXT sy-vline 
WA_ISUEXTH_STR-RELITEM sy-vline 
WA_ISUEXTH_STR-BPNO sy-vline 
WA_ISUEXTH_STR-BPGUID sy-vline 
WA_ISUEXTH_STR-BUAGGUID sy-vline 
WA_ISUEXTH_STR-PODGUID sy-vline 
WA_ISUEXTH_STR-CONTSTART sy-vline 
WA_ISUEXTH_STR-CONTEND sy-vline 
WA_ISUEXTH_STR-CONTDUR sy-vline 
WA_ISUEXTH_STR-VALIDFROM sy-vline 
WA_ISUEXTH_STR-VALIDTO sy-vline 
WA_ISUEXTH_STR-QUOTATION sy-vline 
WA_ISUEXTH_STR-CANCELLED sy-vline 
WA_ISUEXTH_STR-BLOCKED sy-vline 
WA_ISUEXTH_STR-DIVISION sy-vline 
WA_ISUEXTH_STR-CANDI sy-vline      INTO ld_text SEPARATED BY SPACE.

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