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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MRSS/T_SGU_DEMAND
*  INTO TABLE @DATA(IT_/MRSS/T_SGU_DEMAND2).
*--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_SGU_DEMAND INDEX 1 INTO DATA(WA_/MRSS/T_SGU_DEMAND2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MRSS/T_SGU_DEMAND>-ADM = 1.
</MRSS/T_SGU_DEMAND>-GUID = 1.
</MRSS/T_SGU_DEMAND>-HEADER_LEVEL = 1.
</MRSS/T_SGU_DEMAND>-PARENT = 1.
</MRSS/T_SGU_DEMAND>-HEADER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MRSS/T_SGU_DEMAND-DISPO_FLG, sy-vline,
  WA_/MRSS/T_SGU_DEMAND-CAPA_FLG, sy-vline,
  WA_/MRSS/T_SGU_DEMAND-ERR_FLG, sy-vline,
  WA_/MRSS/T_SGU_DEMAND-STAT_COMPL, sy-vline,
  WA_/MRSS/T_SGU_DEMAND-DEMAND_TYPE, sy-vline,
  WA_/MRSS/T_SGU_DEMAND-EDIT_MODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MRSS/T_SGU_DEMAND 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_SGU_DEMAND 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_SGU_DEMAND INTO WA_/MRSS/T_SGU_DEMAND.


*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 DURATION_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/MRSS/T_SGU_DEMAND-DURATION_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MRSS/T_SGU_DEMAND-DURATION_UNIT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field DEM1_MULT_SLOTS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MRSS/T_SGU_DEMAND-DEM1_MULT_SLOTS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MRSS/T_SGU_DEMAND-DEM1_MULT_SLOTS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PROBABILITY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MRSS/T_SGU_DEMAND-PROBABILITY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MRSS/T_SGU_DEMAND-PROBABILITY.
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_SGU_DEMAND_STR, 
ADM TYPE STRING,
GUID TYPE STRING,
HEADER_LEVEL TYPE STRING,
PARENT TYPE STRING,
HEADER TYPE STRING,
DISPO_FLG TYPE STRING,
CAPA_FLG TYPE STRING,
ERR_FLG TYPE STRING,
STAT_COMPL TYPE STRING,
DEMAND_TYPE TYPE STRING,
EDIT_MODE TYPE STRING,
HEADER_TYPE TYPE STRING,
RELEVANCE TYPE STRING,
DEMAND_DEBUG TYPE STRING,
ATTRIBUTES TYPE STRING,
STATUS_TAB TYPE STRING,
ASSIGNMENTS TYPE STRING,
DEMAND TYPE STRING,
GUID TYPE STRING,
HEADER TYPE STRING,
BEGDA TYPE STRING,
BEG_UZEIT TYPE STRING,
ENDDA TYPE STRING,
END_UZEIT TYPE STRING,
SCHED_START_DATE TYPE STRING,
SCHED_START_TIME TYPE STRING,
SCHED_END_DATE TYPE STRING,
SCHED_END_TIME TYPE STRING,
SCHED_TYPE TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
ORIG_ITEM_TYPE TYPE STRING,
STAT_COMPL TYPE STRING,
WORKCENTER_ID TYPE STRING,
WORKCENTER_TYPE TYPE STRING,
WORKCENTER_PLANT TYPE STRING,
WORKCENTER_GUID TYPE STRING,
SUPERVISOR TYPE STRING,
SUPERVISOR_NO TYPE STRING,
DURATION TYPE STRING,
DURATION_UNIT TYPE STRING,
TOTAL_WORK TYPE STRING,
TOTAL_WORK_UNIT TYPE STRING,
MULT_RES TYPE STRING,
STATUS_TAB TYPE STRING,
TIME_CALC_CAPA TYPE STRING,
IS_RES_FIXED TYPE STRING,
IS_DATE_FIXED TYPE STRING,
RESTR_START_TYPE TYPE STRING,
RESTR_END_TYPE TYPE STRING,
RESTRICT_START_DAT TYPE STRING,
RESTRICT_START_TIME TYPE STRING,
RESTRICT_END_DAT TYPE STRING,
RESTRICT_END_TIME TYPE STRING,
DESCRIPTION TYPE STRING,
DEMAND_PRIORITY TYPE STRING,
DEM_NOTES TYPE STRING,
DEM1_MULT_SLOTS TYPE STRING,
REASON TYPE STRING,
REASON_DESC TYPE STRING,
DUMMY TYPE STRING,
DURATIONS TYPE STRING,
DURATION_ACCR TYPE STRING,
POC TYPE STRING,
DURATION_PLAN TYPE STRING,
DURATION_ORIG_PLAN TYPE STRING,
HEADER_ATT TYPE STRING,
HEADER TYPE STRING,
PARENT TYPE STRING,
DEM_TYPE TYPE STRING,
ID TYPE STRING,
DESCRIPTION TYPE STRING,
BASIC_START TYPE STRING,
BASIC_END TYPE STRING,
SCHED_START TYPE STRING,
SCHED_END TYPE STRING,
ACTUAL_START TYPE STRING,
ACTUAL_END TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
STAT_ERR TYPE STRING,
STAT_COMPL TYPE STRING,
PROBABILITY TYPE STRING,
ORIG_ORDER_TYPE TYPE STRING,
PLANT TYPE STRING,
ACTIVITY_TYPE TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_AT TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_AT TYPE STRING,
WORKCENTER_ID TYPE STRING,
WORKCENTER_TYPE TYPE STRING,
WORKCENTER_PLANT TYPE STRING,
SCHEDULING_TYPE TYPE STRING,
HEADERS TYPE STRING,
OBJECT_ID TYPE STRING,
NUMBER_INT TYPE STRING,
HIER_LEVEL TYPE STRING,
TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MRSS/T_SGU_DEMAND_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_SGU_DEMAND_STR-ADM sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-GUID sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-HEADER_LEVEL sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-PARENT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-HEADER sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DISPO_FLG sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-CAPA_FLG sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-ERR_FLG sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-STAT_COMPL sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DEMAND_TYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-EDIT_MODE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-HEADER_TYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-RELEVANCE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DEMAND_DEBUG sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-ATTRIBUTES sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-STATUS_TAB sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-ASSIGNMENTS sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DEMAND sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-GUID sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-HEADER sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-BEGDA sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-BEG_UZEIT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-ENDDA sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-END_UZEIT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-SCHED_START_DATE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-SCHED_START_TIME sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-SCHED_END_DATE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-SCHED_END_TIME sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-SCHED_TYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-PLVAR sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-OTYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-OBJID sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-ORIG_ITEM_TYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-STAT_COMPL sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-WORKCENTER_ID sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-WORKCENTER_TYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-WORKCENTER_PLANT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-WORKCENTER_GUID sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-SUPERVISOR sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-SUPERVISOR_NO sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DURATION sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DURATION_UNIT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-TOTAL_WORK sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-TOTAL_WORK_UNIT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-MULT_RES sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-STATUS_TAB sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-TIME_CALC_CAPA sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-IS_RES_FIXED sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-IS_DATE_FIXED sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-RESTR_START_TYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-RESTR_END_TYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-RESTRICT_START_DAT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-RESTRICT_START_TIME sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-RESTRICT_END_DAT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-RESTRICT_END_TIME sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DESCRIPTION sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DEMAND_PRIORITY sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DEM_NOTES sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DEM1_MULT_SLOTS sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-REASON sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-REASON_DESC sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DUMMY sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DURATIONS sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DURATION_ACCR sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-POC sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DURATION_PLAN sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DURATION_ORIG_PLAN sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-HEADER_ATT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-HEADER sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-PARENT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DEM_TYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-ID sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-DESCRIPTION sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-BASIC_START sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-BASIC_END sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-SCHED_START sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-SCHED_END sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-ACTUAL_START sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-ACTUAL_END sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-PLVAR sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-OTYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-OBJID sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-STAT_ERR sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-STAT_COMPL sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-PROBABILITY sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-ORIG_ORDER_TYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-PLANT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-ACTIVITY_TYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-CREATED_BY sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-CREATED_AT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-CHANGED_BY sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-CHANGED_AT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-WORKCENTER_ID sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-WORKCENTER_TYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-WORKCENTER_PLANT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-SCHEDULING_TYPE sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-HEADERS sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-OBJECT_ID sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-NUMBER_INT sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-HIER_LEVEL sy-vline 
WA_/MRSS/T_SGU_DEMAND_STR-TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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