ABAP Select data from SAP table PRSHWCCAPCHG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PRSHWCCAPCHG
*  INTO TABLE @DATA(IT_PRSHWCCAPCHG2).
*--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_PRSHWCCAPCHG INDEX 1 INTO DATA(WA_PRSHWCCAPCHG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PRSHWCCAPCHG>-MANDT = 1.
<PRSHWCCAPCHG>-CAPACITYINTERNALID = 1.
<PRSHWCCAPCHG>-CALENDARDATE = 1.
<PRSHWCCAPCHG>-WORKCENTERINTERNALID = 1.
<PRSHWCCAPCHG>-WORKCENTER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PRSHWCCAPCHG-CAPACITYACTIVEVERSION, sy-vline,
  WA_PRSHWCCAPCHG-CAPACITYSTARTTIME, sy-vline,
  WA_PRSHWCCAPCHG-WORKCENTERCATEGORYCODE, sy-vline,
  WA_PRSHWCCAPCHG-WORKCENTERTYPECODE, sy-vline,
  WA_PRSHWCCAPCHG-PLANT, sy-vline,
  WA_PRSHWCCAPCHG-WEEKDAY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PRSHWCCAPCHG 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_PRSHWCCAPCHG 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_PRSHWCCAPCHG INTO WA_PRSHWCCAPCHG.


*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_PRSHWCCAPCHG_STR, 
MANDT TYPE STRING,
CAPACITYINTERNALID TYPE STRING,
CALENDARDATE TYPE STRING,
WORKCENTERINTERNALID TYPE STRING,
WORKCENTER TYPE STRING,
CAPACITYACTIVEVERSION TYPE STRING,
CAPACITYSTARTTIME TYPE STRING,
WORKCENTERCATEGORYCODE TYPE STRING,
WORKCENTERTYPECODE TYPE STRING,
PLANT TYPE STRING,
WEEKDAY TYPE STRING,
CALENDARWEEK TYPE STRING,
AVAILABLECAPACITYSHIFT TYPE STRING,
AVAILABLECAPACITYINTERVALDURN TYPE STRING,
WORKDAYRULE TYPE STRING,
CAPACITYENDTIME TYPE STRING,
OPERATINGDURATIONINSECONDS TYPE STRING,
TOTOPERATINGDURATIONINSECONDS TYPE STRING,
CAPACITYNUMBEROFCAPACITIES TYPE STRING,
CAPACITYPLANUTILIZATIONPERCENT TYPE STRING,
FACTORYCALENDAR TYPE STRING,
YEARWEEK TYPE STRING,
SHIFTSTARTTIME TYPE STRING,
SHIFTENDTIME TYPE STRING,
CAPACITYBREAKDURATION TYPE STRING,
CAPACITYCATEGORYALLOCATION TYPE STRING,
WORKCENTERCAPACITYUNIT TYPE STRING,
REFERENCEDCAPACITYINTERNALID TYPE STRING,
CAPACITYISPOOLED TYPE STRING,
ISEDITABLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PRSHWCCAPCHG_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_PRSHWCCAPCHG_STR-MANDT sy-vline 
WA_PRSHWCCAPCHG_STR-CAPACITYINTERNALID sy-vline 
WA_PRSHWCCAPCHG_STR-CALENDARDATE sy-vline 
WA_PRSHWCCAPCHG_STR-WORKCENTERINTERNALID sy-vline 
WA_PRSHWCCAPCHG_STR-WORKCENTER sy-vline 
WA_PRSHWCCAPCHG_STR-CAPACITYACTIVEVERSION sy-vline 
WA_PRSHWCCAPCHG_STR-CAPACITYSTARTTIME sy-vline 
WA_PRSHWCCAPCHG_STR-WORKCENTERCATEGORYCODE sy-vline 
WA_PRSHWCCAPCHG_STR-WORKCENTERTYPECODE sy-vline 
WA_PRSHWCCAPCHG_STR-PLANT sy-vline 
WA_PRSHWCCAPCHG_STR-WEEKDAY sy-vline 
WA_PRSHWCCAPCHG_STR-CALENDARWEEK sy-vline 
WA_PRSHWCCAPCHG_STR-AVAILABLECAPACITYSHIFT sy-vline 
WA_PRSHWCCAPCHG_STR-AVAILABLECAPACITYINTERVALDURN sy-vline 
WA_PRSHWCCAPCHG_STR-WORKDAYRULE sy-vline 
WA_PRSHWCCAPCHG_STR-CAPACITYENDTIME sy-vline 
WA_PRSHWCCAPCHG_STR-OPERATINGDURATIONINSECONDS sy-vline 
WA_PRSHWCCAPCHG_STR-TOTOPERATINGDURATIONINSECONDS sy-vline 
WA_PRSHWCCAPCHG_STR-CAPACITYNUMBEROFCAPACITIES sy-vline 
WA_PRSHWCCAPCHG_STR-CAPACITYPLANUTILIZATIONPERCENT sy-vline 
WA_PRSHWCCAPCHG_STR-FACTORYCALENDAR sy-vline 
WA_PRSHWCCAPCHG_STR-YEARWEEK sy-vline 
WA_PRSHWCCAPCHG_STR-SHIFTSTARTTIME sy-vline 
WA_PRSHWCCAPCHG_STR-SHIFTENDTIME sy-vline 
WA_PRSHWCCAPCHG_STR-CAPACITYBREAKDURATION sy-vline 
WA_PRSHWCCAPCHG_STR-CAPACITYCATEGORYALLOCATION sy-vline 
WA_PRSHWCCAPCHG_STR-WORKCENTERCAPACITYUNIT sy-vline 
WA_PRSHWCCAPCHG_STR-REFERENCEDCAPACITYINTERNALID sy-vline 
WA_PRSHWCCAPCHG_STR-CAPACITYISPOOLED sy-vline 
WA_PRSHWCCAPCHG_STR-ISEDITABLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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