Frequently used - PowerPoint PPT Presentation

Structure Indexes for XML

Structure Indexes for XML. Kinds of Indexes. Value Indexes index atomic values; e.g., data(//emp/salary) use B+ trees (like in relational world) (integration into query optimizer more tricky) Structure Indexes materialize results of path expressions (pendant to join indexes, path indices)

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711 views • 56 slides

Transaction Management

Transaction Management. Chapter 9. What is a Transaction?. A logical unit of work on a database An entire program A portion of a program A single command The entire series of steps necessary to accomplish a logical unit of work

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628 views • 31 slides

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