ABAP Select data from SAP table EWASSERVFREQGROUPITEM_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWASSERVFREQGROUPITEM_DATA
*  INTO TABLE @DATA(IT_EWASSERVFREQGROUPITEM_DATA2).
*--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_EWASSERVFREQGROUPITEM_DATA INDEX 1 INTO DATA(WA_EWASSERVFREQGROUPITEM_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWASSERVFREQGROUPITEM_DATA>-AB = 1.
<EWASSERVFREQGROUPITEM_DATA>-BIS = 1.
<EWASSERVFREQGROUPITEM_DATA>-STARTDATE = 1.
<EWASSERVFREQGROUPITEM_DATA>-PRODUCT_AREA = 1.
<EWASSERVFREQGROUPITEM_DATA>-SERVICE_TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWASSERVFREQGROUPITEM_DATA-FREQUENCY_TYPE, sy-vline,
  WA_EWASSERVFREQGROUPITEM_DATA-FREQUENCY_INTVL, sy-vline,
  WA_EWASSERVFREQGROUPITEM_DATA-WASTE_TYPE, sy-vline,
  WA_EWASSERVFREQGROUPITEM_DATA-SEASON_FROM, sy-vline,
  WA_EWASSERVFREQGROUPITEM_DATA-SEASON_TO, sy-vline,
  WA_EWASSERVFREQGROUPITEM_DATA-MONTHLY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWASSERVFREQGROUPITEM_DATA 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_EWASSERVFREQGROUPITEM_DATA 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_EWASSERVFREQGROUPITEM_DATA INTO WA_EWASSERVFREQGROUPITEM_DATA.


*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 MATN1, internal->external for field WASTE_TYPE
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_EWASSERVFREQGROUPITEM_DATA-WASTE_TYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWASSERVFREQGROUPITEM_DATA-WASTE_TYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MM_TT, internal->external for field SEASON_FROM
CALL FUNCTION 'CONVERSION_EXIT_MM_TT_OUTPUT'
  EXPORTING
    input =                      WA_EWASSERVFREQGROUPITEM_DATA-SEASON_FROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWASSERVFREQGROUPITEM_DATA-SEASON_FROM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MM_TT, internal->external for field SEASON_TO
CALL FUNCTION 'CONVERSION_EXIT_MM_TT_OUTPUT'
  EXPORTING
    input =                      WA_EWASSERVFREQGROUPITEM_DATA-SEASON_TO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWASSERVFREQGROUPITEM_DATA-SEASON_TO.
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_EWASSERVFREQGROUPITEM_DATA_STR, 
AB TYPE STRING,
BIS TYPE STRING,
STARTDATE TYPE STRING,
PRODUCT_AREA TYPE STRING,
SERVICE_TYPE TYPE STRING,
FREQUENCY_TYPE TYPE STRING,
FREQUENCY_INTVL TYPE STRING,
WASTE_TYPE TYPE STRING,
SEASON_FROM TYPE STRING,
SEASON_TO TYPE STRING,
MONTHLY TYPE STRING,
EWEEKDAY TYPE STRING,
TIMEFRAME TYPE STRING,
STARTTIME TYPE STRING,
STOPTIME TYPE STRING,
MONDAY TYPE STRING,
TUESDAY TYPE STRING,
WEDNESDAY TYPE STRING,
THURSDAY TYPE STRING,
FRIDAY TYPE STRING,
SATURDAY TYPE STRING,
SUNDAY TYPE STRING,
DESCRIPTION TYPE STRING,
SERVICECOUNT TYPE STRING,
NEXTSERVICEDATE TYPE STRING,
TSL_GUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWASSERVFREQGROUPITEM_DATA_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_EWASSERVFREQGROUPITEM_DATA_STR-AB sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-BIS sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-STARTDATE sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-PRODUCT_AREA sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-SERVICE_TYPE sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-FREQUENCY_TYPE sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-FREQUENCY_INTVL sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-WASTE_TYPE sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-SEASON_FROM sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-SEASON_TO sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-MONTHLY sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-EWEEKDAY sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-TIMEFRAME sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-STARTTIME sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-STOPTIME sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-MONDAY sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-TUESDAY sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-WEDNESDAY sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-THURSDAY sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-FRIDAY sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-SATURDAY sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-SUNDAY sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-DESCRIPTION sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-SERVICECOUNT sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-NEXTSERVICEDATE sy-vline 
WA_EWASSERVFREQGROUPITEM_DATA_STR-TSL_GUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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