Version Change Log

The following are a list of major changes and bug fixes to Theseus that have become available over time, for different releases.

• Major enhancements:
  • None.
   
  
• Minor enhancements:
  • Connect and read timeout can be specified by user.
  • Improved operator-level logging information.
   
  
• Bug fixes:
  • A couple of logging-related bugs fixed.

• Major enhancements:
  • None.
   
  
• Minor enhancements:
  • Added new Xquery operator (temporarily called xquery2)
  • Added support for a "time" datatype
   
  
• Bug fixes:
  • xml2rel error case hangs execution

• Major enhancements:
  • None.
   
  
• Minor enhancements:
  • Added updated version of xscan.
   
  
• Bug fixes:
  • TheseusBox/Theseus API has memory leaks.

• Major enhancements:
  • None.
   
  
• Minor enhancements:
  • All exceptions propagate normally up the call chain - no more System.exit() calls are made during fatal execution.
  • theseus.api.Theseus handles errors better per exception catching. plan file.
   
  
• Bug fixes:
  • Dbquery returns null for some JDBC types.

• Major enhancements:
  • None.
   
  
• Minor enhancements:
  • New Theseus property: /system/tools/trcli/use-image allows .plan files to be automatically saved as .pobj (serialized compiled plan files) for potentially faster loading during future executions.
  • Relative and full path names can be used when specifying subplans in a .plan file.
   
  
• Bug fixes:
  • Repetitive subplan references cause never-ending execution.

• Major enhancements:
  • New operators added: xscan, antiproject, varunion
  • Speculative execution learning component added (BETA).
  • dbappend, dbexport, dbquery, and dbupdate interfaces changed.
  • New Theseus property: /system/executor/pool/memory/pool_sizes/num_ops controls the default sizes for object pools based on number of operators
  • New Theseus property: /system/executor/pool/memory/pool_sizes/num_tuples controls the default sizes for object pools based on number of tuples per operator
  • New Theseus property: /system/executor/pool/memory/growth_factor controls the growth of object pools when limits are exceeded
   
  
• Minor enhancements:
  • New Theseus property: /system/tools/trcli/output/asap to toggle between immediate and delayed output
  • New Theseus property: /system/tools/trcli/output/header to toggle between output of data+header vs output of only data
  • New Theseus property: /system/tools/trcli/output/stats to toggle between output of data w/o runtime stats vs data w/ runtime stats
  • New Theseus property: /system/logger/append_file controls whether Theseus logfiles are recreated each time or simply appended.
  • New Theseus property: /operators/dbquery/eos_on_exception controls whether exceptions or EOSes are returned when dbquery recieves an error from the database driver during querying.
  • TheseusBox exceptions propagated when runtime exceptions occur.
  • Documentation updated for dbappend, dbexport, dbquery, and dbupdate.
   
  
• Bug fixes:
  • Apply fails when incoming stream consists of only an EOS.
  • Internal queue auto-resizing fails when queue maxes out anywhere except at its natural endpoints.

• Major enhancements:
  • None.
   
  
• Minor enhancements:
  • Documentation updated regarding Xquery and the list of libraries used.
  • Documentation updated regarding Theseus.properties and Tomcat.
   
  
• Bug fixes:
  • Calling same subplan more than once in a parent plan fails.

• Major enhancements:
  • Speculative execution (BETA, for research purposes only)
  • Modified work distribution workflow: active threads access the ready pool
   
  
• Minor enhancements:
  • Automatic work queue resizing
  • Compiler exceptions show the plan text that lead to the exception
  • Rename operator allows duplicate aliases
  • Operator changes:
    • Apply operator casts java.lang.Float and w3.org.Node/Document into correct Theseus types.
  • API changes:
    • Relation.prettyPrint() removed.
    • Relation.toString() no longer prints CRs before data.
    • Tuple.project() added
    • TheseusBox contains several changes designed to make it easier to load and re-execute a plan multiple times.
  • Version change log started
   
  
• Bug fixes:
  • TheseusBox API not able to run multiple plans.
  • Error messages about mistakes in datafile are not helpful.
  • Subplans cannot load if line text does not contain at least one prepending space.