ABAP Select data from SAP table ESH_U_INVGCSMACT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_U_INVGCSMACT
*  INTO TABLE @DATA(IT_ESH_U_INVGCSMACT2).
*--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_ESH_U_INVGCSMACT INDEX 1 INTO DATA(WA_ESH_U_INVGCSMACT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_U_INVGCSMACT>-MANDT = 1.
<ESH_U_INVGCSMACT>-INVGCSMORDERUUID = 1.
<ESH_U_INVGCSMACT>-BUSINESSACTIVITYCATEGORY = 1.
<ESH_U_INVGCSMACT>-BUSINESSACTIVITYCATEGORYNAME = 1.
<ESH_U_INVGCSMACT>-FILEDESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_U_INVGCSMACT-FILENAME, sy-vline,
  WA_ESH_U_INVGCSMACT-INVGCSMACTIVITYCATEGORYCLCODE, sy-vline,
  WA_ESH_U_INVGCSMACT-INVGCSMACTIVITYLOCATIONDESC, sy-vline,
  WA_ESH_U_INVGCSMACT-INVGCSMACTIVITYPROCESSTYPECODE, sy-vline,
  WA_ESH_U_INVGCSMACT-INVGCSMACTIVITYPROCESSTYPETEXT, sy-vline,
  WA_ESH_U_INVGCSMACT-INVGCSMACTIVITYSTATUSTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_U_INVGCSMACT 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_ESH_U_INVGCSMACT 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_ESH_U_INVGCSMACT INTO WA_ESH_U_INVGCSMACT.


*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 INVGCSMORDERID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_U_INVGCSMACT-INVGCSMORDERID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_U_INVGCSMACT-INVGCSMORDERID.
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_ESH_U_INVGCSMACT_STR, 
MANDT TYPE STRING,
INVGCSMORDERUUID TYPE STRING,
BUSINESSACTIVITYCATEGORY TYPE STRING,
BUSINESSACTIVITYCATEGORYNAME TYPE STRING,
FILEDESCRIPTION TYPE STRING,
FILENAME TYPE STRING,
INVGCSMACTIVITYCATEGORYCLCODE TYPE STRING,
INVGCSMACTIVITYLOCATIONDESC TYPE STRING,
INVGCSMACTIVITYPROCESSTYPECODE TYPE STRING,
INVGCSMACTIVITYPROCESSTYPETEXT TYPE STRING,
INVGCSMACTIVITYSTATUSTEXT TYPE STRING,
INVGCSMORDERCATEGORYCODE TYPE STRING,
INVGCSMORDERDESCRIPTION TYPE STRING,
INVGCSMORDERID TYPE STRING,
INVGCSMSECURITYLEVEL TYPE STRING,
INVGCSMSECURITYLVLDESC TYPE STRING,
DOCUMENTTEXT TYPE STRING,
RELATIONNOTE TYPE STRING,
PLAINLONGTEXT TYPE STRING,
SERVICEDOCUMENTPRIORITYNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_U_INVGCSMACT_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_ESH_U_INVGCSMACT_STR-MANDT sy-vline 
WA_ESH_U_INVGCSMACT_STR-INVGCSMORDERUUID sy-vline 
WA_ESH_U_INVGCSMACT_STR-BUSINESSACTIVITYCATEGORY sy-vline 
WA_ESH_U_INVGCSMACT_STR-BUSINESSACTIVITYCATEGORYNAME sy-vline 
WA_ESH_U_INVGCSMACT_STR-FILEDESCRIPTION sy-vline 
WA_ESH_U_INVGCSMACT_STR-FILENAME sy-vline 
WA_ESH_U_INVGCSMACT_STR-INVGCSMACTIVITYCATEGORYCLCODE sy-vline 
WA_ESH_U_INVGCSMACT_STR-INVGCSMACTIVITYLOCATIONDESC sy-vline 
WA_ESH_U_INVGCSMACT_STR-INVGCSMACTIVITYPROCESSTYPECODE sy-vline 
WA_ESH_U_INVGCSMACT_STR-INVGCSMACTIVITYPROCESSTYPETEXT sy-vline 
WA_ESH_U_INVGCSMACT_STR-INVGCSMACTIVITYSTATUSTEXT sy-vline 
WA_ESH_U_INVGCSMACT_STR-INVGCSMORDERCATEGORYCODE sy-vline 
WA_ESH_U_INVGCSMACT_STR-INVGCSMORDERDESCRIPTION sy-vline 
WA_ESH_U_INVGCSMACT_STR-INVGCSMORDERID sy-vline 
WA_ESH_U_INVGCSMACT_STR-INVGCSMSECURITYLEVEL sy-vline 
WA_ESH_U_INVGCSMACT_STR-INVGCSMSECURITYLVLDESC sy-vline 
WA_ESH_U_INVGCSMACT_STR-DOCUMENTTEXT sy-vline 
WA_ESH_U_INVGCSMACT_STR-RELATIONNOTE sy-vline 
WA_ESH_U_INVGCSMACT_STR-PLAINLONGTEXT sy-vline 
WA_ESH_U_INVGCSMACT_STR-SERVICEDOCUMENTPRIORITYNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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