ABAP Select data from SAP table PCAPNIGHT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCAPNIGHT
*  INTO TABLE @DATA(IT_PCAPNIGHT2).
*--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_PCAPNIGHT INDEX 1 INTO DATA(WA_PCAPNIGHT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCAPNIGHT>-MANDT = 1.
<PCAPNIGHT>-CAPACITYINTERNALID = 1.
<PCAPNIGHT>-VALIDITYENDDATE = 1.
<PCAPNIGHT>-WEEKDAY = 1.
<PCAPNIGHT>-AVAILABLECAPACITYSHIFT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCAPNIGHT-CAPACITYACTIVEVERSION, sy-vline,
  WA_PCAPNIGHT-SHIFTNAME, sy-vline,
  WA_PCAPNIGHT-PLANT, sy-vline,
  WA_PCAPNIGHT-FACTORYCALENDAR, sy-vline,
  WA_PCAPNIGHT-CAPACITYCATEGORYCODE, sy-vline,
  WA_PCAPNIGHT-CAPACITYCATEGORYNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCAPNIGHT 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_PCAPNIGHT 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_PCAPNIGHT INTO WA_PCAPNIGHT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PCAPNIGHT_STR, 
MANDT TYPE STRING,
CAPACITYINTERNALID TYPE STRING,
VALIDITYENDDATE TYPE STRING,
WEEKDAY TYPE STRING,
AVAILABLECAPACITYSHIFT TYPE STRING,
CAPACITYACTIVEVERSION TYPE STRING,
SHIFTNAME TYPE STRING,
PLANT TYPE STRING,
FACTORYCALENDAR TYPE STRING,
CAPACITYCATEGORYCODE TYPE STRING,
CAPACITYCATEGORYNAME TYPE STRING,
CAPACITY TYPE STRING,
CAPACITYRESPONSIBLEPLANNER TYPE STRING,
CAPACITYSTARTTIME TYPE STRING,
VALIDITYBEGINDATE TYPE STRING,
NIGHTSPLITDATE TYPE STRING,
AVAILABLECAPACITYINTERVALDURN TYPE STRING,
WORKDAYRULE TYPE STRING,
CAPACITYENDTIME TYPE STRING,
TOTOPERATINGDURATIONINSECONDS TYPE STRING,
OPERATINGDURATIONINSECONDS TYPE STRING,
CAPACITYBREAKDURATION TYPE STRING,
CAPACITYNUMBEROFCAPACITIES TYPE STRING,
CAPACITYPLANUTILIZATIONPERCENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCAPNIGHT_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_PCAPNIGHT_STR-MANDT sy-vline 
WA_PCAPNIGHT_STR-CAPACITYINTERNALID sy-vline 
WA_PCAPNIGHT_STR-VALIDITYENDDATE sy-vline 
WA_PCAPNIGHT_STR-WEEKDAY sy-vline 
WA_PCAPNIGHT_STR-AVAILABLECAPACITYSHIFT sy-vline 
WA_PCAPNIGHT_STR-CAPACITYACTIVEVERSION sy-vline 
WA_PCAPNIGHT_STR-SHIFTNAME sy-vline 
WA_PCAPNIGHT_STR-PLANT sy-vline 
WA_PCAPNIGHT_STR-FACTORYCALENDAR sy-vline 
WA_PCAPNIGHT_STR-CAPACITYCATEGORYCODE sy-vline 
WA_PCAPNIGHT_STR-CAPACITYCATEGORYNAME sy-vline 
WA_PCAPNIGHT_STR-CAPACITY sy-vline 
WA_PCAPNIGHT_STR-CAPACITYRESPONSIBLEPLANNER sy-vline 
WA_PCAPNIGHT_STR-CAPACITYSTARTTIME sy-vline 
WA_PCAPNIGHT_STR-VALIDITYBEGINDATE sy-vline 
WA_PCAPNIGHT_STR-NIGHTSPLITDATE sy-vline 
WA_PCAPNIGHT_STR-AVAILABLECAPACITYINTERVALDURN sy-vline 
WA_PCAPNIGHT_STR-WORKDAYRULE sy-vline 
WA_PCAPNIGHT_STR-CAPACITYENDTIME sy-vline 
WA_PCAPNIGHT_STR-TOTOPERATINGDURATIONINSECONDS sy-vline 
WA_PCAPNIGHT_STR-OPERATINGDURATIONINSECONDS sy-vline 
WA_PCAPNIGHT_STR-CAPACITYBREAKDURATION sy-vline 
WA_PCAPNIGHT_STR-CAPACITYNUMBEROFCAPACITIES sy-vline 
WA_PCAPNIGHT_STR-CAPACITYPLANUTILIZATIONPERCENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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