ABAP Select data from SAP table ISCHEDGLINE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISCHEDGLINE
*  INTO TABLE @DATA(IT_ISCHEDGLINE2).
*--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_ISCHEDGLINE INDEX 1 INTO DATA(WA_ISCHEDGLINE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISCHEDGLINE>-MANDT = 1.
<ISCHEDGLINE>-SCHEDULINGAGREEMENT = 1.
<ISCHEDGLINE>-SCHEDULINGAGREEMENTITEM = 1.
<ISCHEDGLINE>-SCHEDULELINE = 1.
<ISCHEDGLINE>-DELIVDATECATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISCHEDGLINE-SCHEDULELINEDELIVERYDATE, sy-vline,
  WA_ISCHEDGLINE-SCHEDLINESTSCDELIVERYDATE, sy-vline,
  WA_ISCHEDGLINE-SCHEDULELINEDELIVERYTIME, sy-vline,
  WA_ISCHEDGLINE-ORDERQUANTITYUNIT, sy-vline,
  WA_ISCHEDGLINE-SCHEDULELINEORDERQUANTITY, sy-vline,
  WA_ISCHEDGLINE-PURCHASEREQUISITION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISCHEDGLINE 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_ISCHEDGLINE 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_ISCHEDGLINE INTO WA_ISCHEDGLINE.


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

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

*Conversion exit ALPHA, internal->external for field PURCHASEREQUISITION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISCHEDGLINE-PURCHASEREQUISITION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISCHEDGLINE-PURCHASEREQUISITION.
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_ISCHEDGLINE_STR, 
MANDT TYPE STRING,
SCHEDULINGAGREEMENT TYPE STRING,
SCHEDULINGAGREEMENTITEM TYPE STRING,
SCHEDULELINE TYPE STRING,
DELIVDATECATEGORY TYPE STRING,
SCHEDULELINEDELIVERYDATE TYPE STRING,
SCHEDLINESTSCDELIVERYDATE TYPE STRING,
SCHEDULELINEDELIVERYTIME TYPE STRING,
ORDERQUANTITYUNIT TYPE STRING,
SCHEDULELINEORDERQUANTITY TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURCHASEREQUISITIONITEM TYPE STRING,
ROUGHGOODSRECEIPTQTY TYPE STRING,
SCHEDULELINEISFIXED TYPE STRING,
NOOFREMINDERSOFSCHEDULELINE TYPE STRING,
PREVDELIVQTYOFSCHEDULELINE TYPE STRING,
SOURCEOFCREATION TYPE STRING,
SCHEDULELINEOPENQUANTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISCHEDGLINE_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_ISCHEDGLINE_STR-MANDT sy-vline 
WA_ISCHEDGLINE_STR-SCHEDULINGAGREEMENT sy-vline 
WA_ISCHEDGLINE_STR-SCHEDULINGAGREEMENTITEM sy-vline 
WA_ISCHEDGLINE_STR-SCHEDULELINE sy-vline 
WA_ISCHEDGLINE_STR-DELIVDATECATEGORY sy-vline 
WA_ISCHEDGLINE_STR-SCHEDULELINEDELIVERYDATE sy-vline 
WA_ISCHEDGLINE_STR-SCHEDLINESTSCDELIVERYDATE sy-vline 
WA_ISCHEDGLINE_STR-SCHEDULELINEDELIVERYTIME sy-vline 
WA_ISCHEDGLINE_STR-ORDERQUANTITYUNIT sy-vline 
WA_ISCHEDGLINE_STR-SCHEDULELINEORDERQUANTITY sy-vline 
WA_ISCHEDGLINE_STR-PURCHASEREQUISITION sy-vline 
WA_ISCHEDGLINE_STR-PURCHASEREQUISITIONITEM sy-vline 
WA_ISCHEDGLINE_STR-ROUGHGOODSRECEIPTQTY sy-vline 
WA_ISCHEDGLINE_STR-SCHEDULELINEISFIXED sy-vline 
WA_ISCHEDGLINE_STR-NOOFREMINDERSOFSCHEDULELINE sy-vline 
WA_ISCHEDGLINE_STR-PREVDELIVQTYOFSCHEDULELINE sy-vline 
WA_ISCHEDGLINE_STR-SOURCEOFCREATION sy-vline 
WA_ISCHEDGLINE_STR-SCHEDULELINEOPENQUANTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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