ABAP Select data from SAP table ESH_L_ACTYTYPEV2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ESH_L_ACTYTYPEV2 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_L_ACTYTYPEV2. 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_L_ACTYTYPEV2 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_L_ACTYTYPEV2 TYPE STANDARD TABLE OF ESH_L_ACTYTYPEV2,
      WA_ESH_L_ACTYTYPEV2 TYPE ESH_L_ACTYTYPEV2,
      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_L_ACTYTYPEV2> TYPE ESH_L_ACTYTYPEV2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ESH_L_ACTYTYPEV2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ESH_L_ACTYTYPEV2
  INTO TABLE IT_ESH_L_ACTYTYPEV2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_L_ACTYTYPEV2
*  INTO TABLE @DATA(IT_ESH_L_ACTYTYPEV22).
*--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_L_ACTYTYPEV2 INDEX 1 INTO DATA(WA_ESH_L_ACTYTYPEV22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ESH_L_ACTYTYPEV2 ASSIGNING <ESH_L_ACTYTYPEV2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_L_ACTYTYPEV2>-MANDT = 1.
<ESH_L_ACTYTYPEV2>-CONTROLLINGAREA = 1.
<ESH_L_ACTYTYPEV2>-COSTCTRACTIVITYTYPE = 1.
<ESH_L_ACTYTYPEV2>-VALIDITYENDDATE = 1.
<ESH_L_ACTYTYPEV2>-ACTIVITYTYPEISBLOCKED = 1.

ENDLOOP.

LOOP AT IT_ESH_L_ACTYTYPEV2 INTO WA_ESH_L_ACTYTYPEV2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_L_ACTYTYPEV2-ACTIVITYTYPEISBLOCKEDNAME, sy-vline,
  WA_ESH_L_ACTYTYPEV2-ACTUALPRICEALLOCATIONMETHOD, sy-vline,
  WA_ESH_L_ACTYTYPEV2-ALLOCATIONCOSTELEMENT, sy-vline,
  WA_ESH_L_ACTYTYPEV2-COSTCTRACTIVITYTYPECATEGORY, sy-vline,
  WA_ESH_L_ACTYTYPEV2-COSTCTRACTIVITYTYPECATNAME, sy-vline,
  WA_ESH_L_ACTYTYPEV2-COSTCTRACTIVITYTYPEDESC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_L_ACTYTYPEV2 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_L_ACTYTYPEV2 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_L_ACTYTYPEV2 INTO WA_ESH_L_ACTYTYPEV2.


*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 ACTUALPRICEALLOCATIONMETHOD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_ACTYTYPEV2-ACTUALPRICEALLOCATIONMETHOD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_ACTYTYPEV2-ACTUALPRICEALLOCATIONMETHOD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ALLOCATIONCOSTELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_ACTYTYPEV2-ALLOCATIONCOSTELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_ACTYTYPEV2-ALLOCATIONCOSTELEMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field COSTCTRACTIVITYTYPEOUTPQTYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_ACTYTYPEV2-COSTCTRACTIVITYTYPEOUTPQTYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_ACTYTYPEV2-COSTCTRACTIVITYTYPEOUTPQTYUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field COSTCTRACTIVITYTYPEQTYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_ACTYTYPEV2-COSTCTRACTIVITYTYPEQTYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_ACTYTYPEV2-COSTCTRACTIVITYTYPEQTYUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRICEALLOCATIONMETHOD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_ACTYTYPEV2-PRICEALLOCATIONMETHOD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_ACTYTYPEV2-PRICEALLOCATIONMETHOD.
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_L_ACTYTYPEV2_STR, 
MANDT TYPE STRING,
CONTROLLINGAREA TYPE STRING,
COSTCTRACTIVITYTYPE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
ACTIVITYTYPEISBLOCKED TYPE STRING,
ACTIVITYTYPEISBLOCKEDNAME TYPE STRING,
ACTUALPRICEALLOCATIONMETHOD TYPE STRING,
ALLOCATIONCOSTELEMENT TYPE STRING,
COSTCTRACTIVITYTYPECATEGORY TYPE STRING,
COSTCTRACTIVITYTYPECATNAME TYPE STRING,
COSTCTRACTIVITYTYPEDESC TYPE STRING,
COSTCTRACTIVITYTYPENAME TYPE STRING,
COSTCTRACTIVITYTYPEOUTPQTYUNIT TYPE STRING,
COSTCTRACTIVITYTYPEQTYUNIT TYPE STRING,
COSTCTRACTIVITYTYPEVALIDCAT TYPE STRING,
COSTCTRACTYTYPEOUTPQTYUNITNAME TYPE STRING,
COSTELEMENTNAME TYPE STRING,
CREATIONDATE TYPE STRING,
ENTEREDBYUSER TYPE STRING,
FULLNAME TYPE STRING,
OUTPUTQUANTITYFACTOR TYPE STRING,
PRICEALLOCATIONMETHOD TYPE STRING,
UNITOFMEASURENAME TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_L_ACTYTYPEV2_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_L_ACTYTYPEV2_STR-MANDT sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-CONTROLLINGAREA sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-COSTCTRACTIVITYTYPE sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-VALIDITYENDDATE sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-ACTIVITYTYPEISBLOCKED sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-ACTIVITYTYPEISBLOCKEDNAME sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-ACTUALPRICEALLOCATIONMETHOD sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-ALLOCATIONCOSTELEMENT sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-COSTCTRACTIVITYTYPECATEGORY sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-COSTCTRACTIVITYTYPECATNAME sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-COSTCTRACTIVITYTYPEDESC sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-COSTCTRACTIVITYTYPENAME sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-COSTCTRACTIVITYTYPEOUTPQTYUNIT sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-COSTCTRACTIVITYTYPEQTYUNIT sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-COSTCTRACTIVITYTYPEVALIDCAT sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-COSTCTRACTYTYPEOUTPQTYUNITNAME sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-COSTELEMENTNAME sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-CREATIONDATE sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-ENTEREDBYUSER sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-FULLNAME sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-OUTPUTQUANTITYFACTOR sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-PRICEALLOCATIONMETHOD sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-UNITOFMEASURENAME sy-vline 
WA_ESH_L_ACTYTYPEV2_STR-VALIDITYSTARTDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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