ABAP Select data from SAP table WFMCAS_SHIFT_SG2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WFMCAS_SHIFT_SG2 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 WFMCAS_SHIFT_SG2. 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 WFMCAS_SHIFT_SG2 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_WFMCAS_SHIFT_SG2 TYPE STANDARD TABLE OF WFMCAS_SHIFT_SG2,
      WA_WFMCAS_SHIFT_SG2 TYPE WFMCAS_SHIFT_SG2,
      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: <WFMCAS_SHIFT_SG2> TYPE WFMCAS_SHIFT_SG2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WFMCAS_SHIFT_SG2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WFMCAS_SHIFT_SG2
  INTO TABLE IT_WFMCAS_SHIFT_SG2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFMCAS_SHIFT_SG2
*  INTO TABLE @DATA(IT_WFMCAS_SHIFT_SG22).
*--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_WFMCAS_SHIFT_SG2 INDEX 1 INTO DATA(WA_WFMCAS_SHIFT_SG22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WFMCAS_SHIFT_SG2 ASSIGNING <WFMCAS_SHIFT_SG2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WFMCAS_SHIFT_SG2>-MANDT = 1.
<WFMCAS_SHIFT_SG2>-SHIFT_SEG_ID = 1.
<WFMCAS_SHIFT_SG2>-SCHEDULE_ID = 1.
<WFMCAS_SHIFT_SG2>-BRKTYPE_LOC = 1.
<WFMCAS_SHIFT_SG2>-BRKTYPE_ID = 1.

ENDLOOP.

LOOP AT IT_WFMCAS_SHIFT_SG2 INTO WA_WFMCAS_SHIFT_SG2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WFMCAS_SHIFT_SG2-CHARGE_DATE, sy-vline,
  WA_WFMCAS_SHIFT_SG2-PARTNER, sy-vline,
  WA_WFMCAS_SHIFT_SG2-SHIFT_ID, sy-vline,
  WA_WFMCAS_SHIFT_SG2-WRKAREA_ID, sy-vline,
  WA_WFMCAS_SHIFT_SG2-SCHDL_EVT_ID, sy-vline,
  WA_WFMCAS_SHIFT_SG2-CURRENCY_CODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WFMCAS_SHIFT_SG2 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_WFMCAS_SHIFT_SG2 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_WFMCAS_SHIFT_SG2 INTO WA_WFMCAS_SHIFT_SG2.


*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 BRKTYPE_LOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_SHIFT_SG2-BRKTYPE_LOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_SHIFT_SG2-BRKTYPE_LOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BRKTYPE_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_SHIFT_SG2-BRKTYPE_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_SHIFT_SG2-BRKTYPE_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_SHIFT_SG2-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_SHIFT_SG2-PARTNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field WORK_HRS_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_SHIFT_SG2-WORK_HRS_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_SHIFT_SG2-WORK_HRS_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TZTMP, internal->external for field FIXED_START
CALL FUNCTION 'CONVERSION_EXIT_TZTMP_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_SHIFT_SG2-FIXED_START
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_SHIFT_SG2-FIXED_START.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TZTMP, internal->external for field FIXED_END
CALL FUNCTION 'CONVERSION_EXIT_TZTMP_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_SHIFT_SG2-FIXED_END
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_SHIFT_SG2-FIXED_END.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TZTMP, internal->external for field CREATED_AT
CALL FUNCTION 'CONVERSION_EXIT_TZTMP_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_SHIFT_SG2-CREATED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_SHIFT_SG2-CREATED_AT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TZTMP, internal->external for field CHANGED_AT
CALL FUNCTION 'CONVERSION_EXIT_TZTMP_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_SHIFT_SG2-CHANGED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_SHIFT_SG2-CHANGED_AT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TZTMP, internal->external for field START_OF_SEG
CALL FUNCTION 'CONVERSION_EXIT_TZTMP_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_SHIFT_SG2-START_OF_SEG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_SHIFT_SG2-START_OF_SEG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TZTMP, internal->external for field END_OF_SEG
CALL FUNCTION 'CONVERSION_EXIT_TZTMP_OUTPUT'
  EXPORTING
    input =                      WA_WFMCAS_SHIFT_SG2-END_OF_SEG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMCAS_SHIFT_SG2-END_OF_SEG.
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_WFMCAS_SHIFT_SG2_STR, 
MANDT TYPE STRING,
SHIFT_SEG_ID TYPE STRING,
SCHEDULE_ID TYPE STRING,
BRKTYPE_LOC TYPE STRING,
BRKTYPE_ID TYPE STRING,
CHARGE_DATE TYPE STRING,
PARTNER TYPE STRING,
SHIFT_ID TYPE STRING,
WRKAREA_ID TYPE STRING,
SCHDL_EVT_ID TYPE STRING,
CURRENCY_CODE TYPE STRING,
REGULAR_HRS TYPE STRING,
WORK_HRS_UNIT TYPE STRING,
REGULAR_PAY TYPE STRING,
OVERTIME_HRS TYPE STRING,
OVERTIME_PAY TYPE STRING,
UNPAID_HRS TYPE STRING,
REPLACED_FLAG TYPE STRING,
MODIFIED_FLAG TYPE STRING,
STATUS TYPE STRING,
SEGMENT_PAY TYPE STRING,
PARENT_SEG_ID TYPE STRING,
FIXED_START TYPE STRING,
FIXED_END TYPE STRING,
FIXED_TYPE TYPE STRING,
ASSIGNMENT_ID TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_AT TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_AT TYPE STRING,
CROSS_OVER TYPE STRING,
START_OF_SEG TYPE STRING,
END_OF_SEG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WFMCAS_SHIFT_SG2_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_WFMCAS_SHIFT_SG2_STR-MANDT sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-SHIFT_SEG_ID sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-SCHEDULE_ID sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-BRKTYPE_LOC sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-BRKTYPE_ID sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-CHARGE_DATE sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-PARTNER sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-SHIFT_ID sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-WRKAREA_ID sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-SCHDL_EVT_ID sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-CURRENCY_CODE sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-REGULAR_HRS sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-WORK_HRS_UNIT sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-REGULAR_PAY sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-OVERTIME_HRS sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-OVERTIME_PAY sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-UNPAID_HRS sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-REPLACED_FLAG sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-MODIFIED_FLAG sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-STATUS sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-SEGMENT_PAY sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-PARENT_SEG_ID sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-FIXED_START sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-FIXED_END sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-FIXED_TYPE sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-ASSIGNMENT_ID sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-CREATED_BY sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-CREATED_AT sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-CHANGED_BY sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-CHANGED_AT sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-CROSS_OVER sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-START_OF_SEG sy-vline 
WA_WFMCAS_SHIFT_SG2_STR-END_OF_SEG sy-vline      INTO ld_text SEPARATED BY SPACE.

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