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1. GLOBALSOFT TECHNOLOGIES
Mapping XML to a Wide Sparse Table
Abstract
XML is commonly supported by SQL database systems. However, existing mappings of
XML to tables can only deliver satisfactory query performance for limited use cases. In this
paper, we propose a novel mapping of XML data into one wide table whose columns are
sparsely populated. This mapping provides good performance for document types and
queries that are observed in enterprise applications but are not supported efficiently by
existing work. XML queries are evaluated by translating them into SQL queries over the
wide sparsely-populated table. We show how to translate full XPath 1.0 into SQL. Based on
the characteristics of the new mapping, we present rewriting optimizations that dramatically
reduce the number of joins. Experiments demonstrate that query evaluation over the new
mapping delivers considerable improvements over existing techniques for the target use
cases.
Existing system
XML is commonly supported by SQL database systems. However, existing mappings of
XML to tables can only deliver satisfactory query performance for limited use cases.
Proposed system
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2. In this paper, we propose a novel mapping of XML data into one wide table whose columns
are sparsely populated. This mapping provides good performance for document types and
queries that are observed in enterprise applications but are not supported efficiently by
existing work. XML queries are evaluated by translating them into SQL queries over the
wide sparsely-populated table. We show how to translate full XPath 1.0 into SQL. Based on
the characteristics of the new mapping, we present rewriting optimizations that dramatically
reduce the number of joins. Experiments demonstrate that query evaluation over the new
mapping delivers considerable improvements over existing techniques for the target use
cases.
System Configuration:-
Hardware Configuration:-
 Processor - Pentium –IV
 Speed - 1.1 Ghz
 RAM - 256 MB(min)
 Hard Disk - 20 GB
 Key Board - Standard Windows Keyboard
 Mouse - Two or Three Button Mouse
 Monitor - SVGA
Software Configuration:-
 Operating System : Windows XP
 Programming Language : JAVA

3.  Java Version : JDK 1.6 & above.