ABAP Select data from SAP table EHS_SERVICE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHS_SERVICE
*  INTO TABLE @DATA(IT_EHS_SERVICE2).
*--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_EHS_SERVICE INDEX 1 INTO DATA(WA_EHS_SERVICE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHS_SERVICE>-MANDT = 1.
<EHS_SERVICE>-SRV_NUMBER = 1.
<EHS_SERVICE>-PERNR = 1.
<EHS_SERVICE>-HEALTHCENTRE = 1.
<EHS_SERVICE>-SRV_TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHS_SERVICE-SRV_STATUS, sy-vline,
  WA_EHS_SERVICE-SRV_REVIEW, sy-vline,
  WA_EHS_SERVICE-SRV_INFOPERS, sy-vline,
  WA_EHS_SERVICE-SRV_OPENDATE, sy-vline,
  WA_EHS_SERVICE-SRV_SIGNOFFDATE, sy-vline,
  WA_EHS_SERVICE-SRV_CLOSUREDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHS_SERVICE 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_EHS_SERVICE 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_EHS_SERVICE INTO WA_EHS_SERVICE.


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

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

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

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

*Conversion exit ALPHA, internal->external for field ACTNTOBJ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EHS_SERVICE-ACTNTOBJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHS_SERVICE-ACTNTOBJ.
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_EHS_SERVICE_STR, 
MANDT TYPE STRING,
SRV_NUMBER TYPE STRING,
PERNR TYPE STRING,
HEALTHCENTRE TYPE STRING,
SRV_TYPE TYPE STRING,
SRV_STATUS TYPE STRING,
SRV_REVIEW TYPE STRING,
SRV_INFOPERS TYPE STRING,
SRV_OPENDATE TYPE STRING,
SRV_SIGNOFFDATE TYPE STRING,
SRV_CLOSUREDATE TYPE STRING,
SRV_FOLLOWUP TYPE STRING,
SRV_DECIND TYPE STRING,
SRV_REVFLAG TYPE STRING,
SRV_REVDATE TYPE STRING,
SRV_INVITPRI TYPE STRING,
SRV_PHYSICIAN TYPE STRING,
PHYSFLAG TYPE STRING,
SRV_DURA TYPE STRING,
COST_INT TYPE STRING,
WAEHR_INT TYPE STRING,
DURATION_INT TYPE STRING,
COST_EXT TYPE STRING,
WAEHR_EXT TYPE STRING,
DURATION_EXT TYPE STRING,
UNAME TYPE STRING,
AEDTM TYPE STRING,
SRV_PRESP TYPE STRING,
RECNTOBJ TYPE STRING,
ACTNTOBJ TYPE STRING,
REFOBJ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHS_SERVICE_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_EHS_SERVICE_STR-MANDT sy-vline 
WA_EHS_SERVICE_STR-SRV_NUMBER sy-vline 
WA_EHS_SERVICE_STR-PERNR sy-vline 
WA_EHS_SERVICE_STR-HEALTHCENTRE sy-vline 
WA_EHS_SERVICE_STR-SRV_TYPE sy-vline 
WA_EHS_SERVICE_STR-SRV_STATUS sy-vline 
WA_EHS_SERVICE_STR-SRV_REVIEW sy-vline 
WA_EHS_SERVICE_STR-SRV_INFOPERS sy-vline 
WA_EHS_SERVICE_STR-SRV_OPENDATE sy-vline 
WA_EHS_SERVICE_STR-SRV_SIGNOFFDATE sy-vline 
WA_EHS_SERVICE_STR-SRV_CLOSUREDATE sy-vline 
WA_EHS_SERVICE_STR-SRV_FOLLOWUP sy-vline 
WA_EHS_SERVICE_STR-SRV_DECIND sy-vline 
WA_EHS_SERVICE_STR-SRV_REVFLAG sy-vline 
WA_EHS_SERVICE_STR-SRV_REVDATE sy-vline 
WA_EHS_SERVICE_STR-SRV_INVITPRI sy-vline 
WA_EHS_SERVICE_STR-SRV_PHYSICIAN sy-vline 
WA_EHS_SERVICE_STR-PHYSFLAG sy-vline 
WA_EHS_SERVICE_STR-SRV_DURA sy-vline 
WA_EHS_SERVICE_STR-COST_INT sy-vline 
WA_EHS_SERVICE_STR-WAEHR_INT sy-vline 
WA_EHS_SERVICE_STR-DURATION_INT sy-vline 
WA_EHS_SERVICE_STR-COST_EXT sy-vline 
WA_EHS_SERVICE_STR-WAEHR_EXT sy-vline 
WA_EHS_SERVICE_STR-DURATION_EXT sy-vline 
WA_EHS_SERVICE_STR-UNAME sy-vline 
WA_EHS_SERVICE_STR-AEDTM sy-vline 
WA_EHS_SERVICE_STR-SRV_PRESP sy-vline 
WA_EHS_SERVICE_STR-RECNTOBJ sy-vline 
WA_EHS_SERVICE_STR-ACTNTOBJ sy-vline 
WA_EHS_SERVICE_STR-REFOBJ sy-vline      INTO ld_text SEPARATED BY SPACE.

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