ABAP Select data from SAP table ESH_U_ACTIVITY_T 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_ACTIVITY_T 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_ACTIVITY_T. 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_ACTIVITY_T 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_ACTIVITY_T TYPE STANDARD TABLE OF ESH_U_ACTIVITY_T,
      WA_ESH_U_ACTIVITY_T TYPE ESH_U_ACTIVITY_T,
      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_ACTIVITY_T> TYPE ESH_U_ACTIVITY_T.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_U_ACTIVITY_T
*  INTO TABLE @DATA(IT_ESH_U_ACTIVITY_T2).
*--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_ACTIVITY_T INDEX 1 INTO DATA(WA_ESH_U_ACTIVITY_T2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_U_ACTIVITY_T>-MANDT = 1.
<ESH_U_ACTIVITY_T>-KOKRS = 1.
<ESH_U_ACTIVITY_T>-LSTAR = 1.
<ESH_U_ACTIVITY_T>-DATBI = 1.
<ESH_U_ACTIVITY_T>-DATAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_U_ACTIVITY_T-LEINH, sy-vline,
  WA_ESH_U_ACTIVITY_T-LATYP, sy-vline,
  WA_ESH_U_ACTIVITY_T-ERSDA, sy-vline,
  WA_ESH_U_ACTIVITY_T-USNAM, sy-vline,
  WA_ESH_U_ACTIVITY_T-KSTTY, sy-vline,
  WA_ESH_U_ACTIVITY_T-VKSTA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_U_ACTIVITY_T 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_ACTIVITY_T 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_ACTIVITY_T INTO WA_ESH_U_ACTIVITY_T.


*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 CUNIT, internal->external for field LEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ESH_U_ACTIVITY_T-LEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_U_ACTIVITY_T-LEINH.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_U_ACTIVITY_T-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_U_ACTIVITY_T-KOSTL.
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_ACTIVITY_T_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
LSTAR TYPE STRING,
DATBI TYPE STRING,
DATAB TYPE STRING,
LEINH TYPE STRING,
LATYP TYPE STRING,
ERSDA TYPE STRING,
USNAM TYPE STRING,
KSTTY TYPE STRING,
VKSTA TYPE STRING,
SPRKZ TYPE STRING,
TARKZ TYPE STRING,
KTEXT TYPE STRING,
LTEXT TYPE STRING,
BEZEI TYPE STRING,
TXT TYPE STRING,
MSEH3 TYPE STRING,
MSEHL TYPE STRING,
KTOPL TYPE STRING,
KTEXT1 TYPE STRING,
DDTEXT TYPE STRING,
VALUE_TEXT TYPE STRING,
NAME_TEXT TYPE STRING,
KOSTL TYPE STRING,
OBJNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_U_ACTIVITY_T_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_ACTIVITY_T_STR-MANDT sy-vline 
WA_ESH_U_ACTIVITY_T_STR-KOKRS sy-vline 
WA_ESH_U_ACTIVITY_T_STR-LSTAR sy-vline 
WA_ESH_U_ACTIVITY_T_STR-DATBI sy-vline 
WA_ESH_U_ACTIVITY_T_STR-DATAB sy-vline 
WA_ESH_U_ACTIVITY_T_STR-LEINH sy-vline 
WA_ESH_U_ACTIVITY_T_STR-LATYP sy-vline 
WA_ESH_U_ACTIVITY_T_STR-ERSDA sy-vline 
WA_ESH_U_ACTIVITY_T_STR-USNAM sy-vline 
WA_ESH_U_ACTIVITY_T_STR-KSTTY sy-vline 
WA_ESH_U_ACTIVITY_T_STR-VKSTA sy-vline 
WA_ESH_U_ACTIVITY_T_STR-SPRKZ sy-vline 
WA_ESH_U_ACTIVITY_T_STR-TARKZ sy-vline 
WA_ESH_U_ACTIVITY_T_STR-KTEXT sy-vline 
WA_ESH_U_ACTIVITY_T_STR-LTEXT sy-vline 
WA_ESH_U_ACTIVITY_T_STR-BEZEI sy-vline 
WA_ESH_U_ACTIVITY_T_STR-TXT sy-vline 
WA_ESH_U_ACTIVITY_T_STR-MSEH3 sy-vline 
WA_ESH_U_ACTIVITY_T_STR-MSEHL sy-vline 
WA_ESH_U_ACTIVITY_T_STR-KTOPL sy-vline 
WA_ESH_U_ACTIVITY_T_STR-KTEXT1 sy-vline 
WA_ESH_U_ACTIVITY_T_STR-DDTEXT sy-vline 
WA_ESH_U_ACTIVITY_T_STR-VALUE_TEXT sy-vline 
WA_ESH_U_ACTIVITY_T_STR-NAME_TEXT sy-vline 
WA_ESH_U_ACTIVITY_T_STR-KOSTL sy-vline 
WA_ESH_U_ACTIVITY_T_STR-OBJNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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