ABAP Select data from SAP table PPSCH_SCHEDG_PARAMS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PPSCH_SCHEDG_PARAMS
*  INTO TABLE @DATA(IT_PPSCH_SCHEDG_PARAMS2).
*--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_PPSCH_SCHEDG_PARAMS INDEX 1 INTO DATA(WA_PPSCH_SCHEDG_PARAMS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PPSCH_SCHEDG_PARAMS>-SIMULATIONSESSIONID = 1.
<PPSCH_SCHEDG_PARAMS>-ORDERID = 1.
<PPSCH_SCHEDG_PARAMS>-CAPACITYRQMTITEMCAPACITY = 1.
<PPSCH_SCHEDG_PARAMS>-CAPACITYREQUIREMENTITEM = 1.
<PPSCH_SCHEDG_PARAMS>-ORDERCATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PPSCH_SCHEDG_PARAMS-PRODUCT, sy-vline,
  WA_PPSCH_SCHEDG_PARAMS-PRODUCTIONVERSION, sy-vline,
  WA_PPSCH_SCHEDG_PARAMS-ORDERPLANNEDTOTALQTY, sy-vline,
  WA_PPSCH_SCHEDG_PARAMS-BASEUNIT, sy-vline,
  WA_PPSCH_SCHEDG_PARAMS-WORKCENTER, sy-vline,
  WA_PPSCH_SCHEDG_PARAMS-OPERATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PPSCH_SCHEDG_PARAMS 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_PPSCH_SCHEDG_PARAMS 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_PPSCH_SCHEDG_PARAMS INTO WA_PPSCH_SCHEDG_PARAMS.


*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 MATN1, internal->external for field PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_PPSCH_SCHEDG_PARAMS-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PPSCH_SCHEDG_PARAMS-PRODUCT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field OPERATION
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_PPSCH_SCHEDG_PARAMS-OPERATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PPSCH_SCHEDG_PARAMS-OPERATION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PPSCH_SCHEDG_PARAMS-UNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PPSCH_SCHEDG_PARAMS-UNITOFMEASURE.
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_PPSCH_SCHEDG_PARAMS_STR, 
SIMULATIONSESSIONID TYPE STRING,
ORDERID TYPE STRING,
CAPACITYRQMTITEMCAPACITY TYPE STRING,
CAPACITYREQUIREMENTITEM TYPE STRING,
ORDERCATEGORY TYPE STRING,
PRODUCT TYPE STRING,
PRODUCTIONVERSION TYPE STRING,
ORDERPLANNEDTOTALQTY TYPE STRING,
BASEUNIT TYPE STRING,
WORKCENTER TYPE STRING,
OPERATION TYPE STRING,
REMAININGCAPREQEXECUTIONDURN TYPE STRING,
UNITOFMEASURE TYPE STRING,
OPERATIONPLANNINGSTATUSCODE TYPE STRING,
DUMMYSCHEDULEDORDENDDATETIME TYPE STRING,
DUMMYSCHEDULEDORDSTARTDATETIME TYPE STRING,
LTSTSCHEDLDEXECENDDTETME TYPE STRING,
LTSTSCHEDLDEXECSTRTDTETME TYPE STRING,
CAPACITYCATEGORYNAME TYPE STRING,
CAPACITYRESPONSIBLEPLANNER TYPE STRING,
STATUSCRITICALITY TYPE STRING,
STATUSCODE TYPE STRING,
MRPAREA TYPE STRING,
MRPCONTROLLER TYPE STRING,
NUMBEROFSOS TYPE STRING,
WORKCENTERRESPONSIBLE TYPE STRING,
PLANT TYPE STRING,
PRODUCTGROUP TYPE STRING,
RECEIPTDATE TYPE STRING,
REQUIREMENTDATE TYPE STRING,
WORKCENTERGROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PPSCH_SCHEDG_PARAMS_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_PPSCH_SCHEDG_PARAMS_STR-SIMULATIONSESSIONID sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-ORDERID sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-CAPACITYRQMTITEMCAPACITY sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-CAPACITYREQUIREMENTITEM sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-ORDERCATEGORY sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-PRODUCT sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-PRODUCTIONVERSION sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-ORDERPLANNEDTOTALQTY sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-BASEUNIT sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-WORKCENTER sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-OPERATION sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-REMAININGCAPREQEXECUTIONDURN sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-UNITOFMEASURE sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-OPERATIONPLANNINGSTATUSCODE sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-DUMMYSCHEDULEDORDENDDATETIME sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-DUMMYSCHEDULEDORDSTARTDATETIME sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-LTSTSCHEDLDEXECENDDTETME sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-LTSTSCHEDLDEXECSTRTDTETME sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-CAPACITYCATEGORYNAME sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-CAPACITYRESPONSIBLEPLANNER sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-STATUSCRITICALITY sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-STATUSCODE sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-MRPAREA sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-MRPCONTROLLER sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-NUMBEROFSOS sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-WORKCENTERRESPONSIBLE sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-PLANT sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-PRODUCTGROUP sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-RECEIPTDATE sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-REQUIREMENTDATE sy-vline 
WA_PPSCH_SCHEDG_PARAMS_STR-WORKCENTERGROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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