ABAP Select data from SAP table /MRSS/T_DEM_INFO_WRK into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP /MRSS/T_DEM_INFO_WRK 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 /MRSS/T_DEM_INFO_WRK. 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 /MRSS/T_DEM_INFO_WRK 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_/MRSS/T_DEM_INFO_WRK TYPE STANDARD TABLE OF /MRSS/T_DEM_INFO_WRK,
      WA_/MRSS/T_DEM_INFO_WRK TYPE /MRSS/T_DEM_INFO_WRK,
      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: </MRSS/T_DEM_INFO_WRK> TYPE /MRSS/T_DEM_INFO_WRK.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /MRSS/T_DEM_INFO_WRK
  INTO TABLE IT_/MRSS/T_DEM_INFO_WRK.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MRSS/T_DEM_INFO_WRK
*  INTO TABLE @DATA(IT_/MRSS/T_DEM_INFO_WRK2).
*--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_/MRSS/T_DEM_INFO_WRK INDEX 1 INTO DATA(WA_/MRSS/T_DEM_INFO_WRK2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/MRSS/T_DEM_INFO_WRK ASSIGNING </MRSS/T_DEM_INFO_WRK>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MRSS/T_DEM_INFO_WRK>-KEY_EXT = 1.
</MRSS/T_DEM_INFO_WRK>-LOGSYS = 1.
</MRSS/T_DEM_INFO_WRK>-GUID = 1.
</MRSS/T_DEM_INFO_WRK>-PARTNER_NO = 1.
</MRSS/T_DEM_INFO_WRK>-PRODUCT = 1.

ENDLOOP.

LOOP AT IT_/MRSS/T_DEM_INFO_WRK INTO WA_/MRSS/T_DEM_INFO_WRK.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MRSS/T_DEM_INFO_WRK-KUNNR, sy-vline,
  WA_/MRSS/T_DEM_INFO_WRK-PROBABILITY, sy-vline,
  WA_/MRSS/T_DEM_INFO_WRK-SUPERVISOR, sy-vline,
  WA_/MRSS/T_DEM_INFO_WRK-SUPERVISOR_NO, sy-vline,
  WA_/MRSS/T_DEM_INFO_WRK-FOUND_RESOURCES, sy-vline,
  WA_/MRSS/T_DEM_INFO_WRK-AUTOMATIC_ASGN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MRSS/T_DEM_INFO_WRK 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_/MRSS/T_DEM_INFO_WRK 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_/MRSS/T_DEM_INFO_WRK INTO WA_/MRSS/T_DEM_INFO_WRK.


*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 LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MRSS/T_DEM_INFO_WRK-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MRSS/T_DEM_INFO_WRK-LOGSYS.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit TPLNR, internal->external for field ZZFUNC_LOC
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_/MRSS/T_DEM_INFO_WRK-ZZFUNC_LOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MRSS/T_DEM_INFO_WRK-ZZFUNC_LOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZZEQUIP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MRSS/T_DEM_INFO_WRK-ZZEQUIP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MRSS/T_DEM_INFO_WRK-ZZEQUIP.
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_/MRSS/T_DEM_INFO_WRK_STR, 
KEY_EXT TYPE STRING,
LOGSYS TYPE STRING,
GUID TYPE STRING,
PARTNER_NO TYPE STRING,
PRODUCT TYPE STRING,
KUNNR TYPE STRING,
PROBABILITY TYPE STRING,
SUPERVISOR TYPE STRING,
SUPERVISOR_NO TYPE STRING,
FOUND_RESOURCES TYPE STRING,
AUTOMATIC_ASGN TYPE STRING,
SCHED_INDICATOR TYPE STRING,
SALES_ORG TYPE STRING,
REQUESTER_EMAIL TYPE STRING,
REQUESTER_UNAME TYPE STRING,
REQUESTER_FNAME TYPE STRING,
REQUESTER_TLNUM TYPE STRING,
DURATN_SRC TYPE STRING,
DURATN_SRC_UNIT TYPE STRING,
TIME_CALC_CAPA TYPE STRING,
STATUS_GRP_ID TYPE STRING,
REF_GUID_H TYPE STRING,
REF_GUID_I TYPE STRING,
REF_EXT_ID TYPE STRING,
ACTIVITY_TYPE TYPE STRING,
DUMMY TYPE STRING,
RESOURCE_KEY TYPE STRING,
APPT_EARL_START TYPE STRING,
APPT_LAT_START TYPE STRING,
APPT_EARL_END TYPE STRING,
APPT_LAT_END TYPE STRING,
ZZFUNC_LOC TYPE STRING,
ZZFUNC_LOC_TXT TYPE STRING,
ZZPLNR_GROUP TYPE STRING,
ZZREVISION TYPE STRING,
ZZEQUIP TYPE STRING,
ZZEQUIP_TXT TYPE STRING,
ZZABC TYPE STRING,
ZZPLANT_SEC TYPE STRING,
ZZROOM TYPE STRING,
ZZLOCATION TYPE STRING,
ZZCITY TYPE STRING,
ZZCUSTOMER TYPE STRING,
ZZSTREET TYPE STRING,
ZZZIP TYPE STRING,
OPERATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MRSS/T_DEM_INFO_WRK_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_/MRSS/T_DEM_INFO_WRK_STR-KEY_EXT sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-LOGSYS sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-GUID sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-PARTNER_NO sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-PRODUCT sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-KUNNR sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-PROBABILITY sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-SUPERVISOR sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-SUPERVISOR_NO sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-FOUND_RESOURCES sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-AUTOMATIC_ASGN sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-SCHED_INDICATOR sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-SALES_ORG sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-REQUESTER_EMAIL sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-REQUESTER_UNAME sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-REQUESTER_FNAME sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-REQUESTER_TLNUM sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-DURATN_SRC sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-DURATN_SRC_UNIT sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-TIME_CALC_CAPA sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-STATUS_GRP_ID sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-REF_GUID_H sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-REF_GUID_I sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-REF_EXT_ID sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ACTIVITY_TYPE sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-DUMMY sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-RESOURCE_KEY sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-APPT_EARL_START sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-APPT_LAT_START sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-APPT_EARL_END sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-APPT_LAT_END sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZFUNC_LOC sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZFUNC_LOC_TXT sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZPLNR_GROUP sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZREVISION sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZEQUIP sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZEQUIP_TXT sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZABC sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZPLANT_SEC sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZROOM sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZLOCATION sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZCITY sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZCUSTOMER sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZSTREET sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-ZZZIP sy-vline 
WA_/MRSS/T_DEM_INFO_WRK_STR-OPERATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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