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* Query language enhancements including "INSERT/UPDATE/DELETE RETURNING", multirow VALUES lists, and optional target-table alias in "UPDATE"/"DELETE" * Index creation without blocking concurrent "INSERT"/"UPDATE"/"DELETE" operations * Many query optimization improvements, including support for reordering outer joins * Improved sorting performance with lower memory usage * More efficient locking with better concurrency * More efficient vacuuming * Easier administration of warm standby servers * New FILLFACTOR support for tables and indexes * Monitoring, logging, and performance tuning additions * More control over creating and dropping objects * Table inheritance relationships can be defined for and removed from pre-existing tables * "COPY TO" can copy the output of an arbitrary "SELECT" statement * Array improvements, including nulls in arrays * Aggregate-function improvements, including multiple-input aggregates and SQL:2003 statistical functions * Many "contrib/" improvements
6 lines
384 B
Text
6 lines
384 B
Text
The Tsearch2 contrib module contains an implementation of a new data
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type tsvector - a searchable data type with indexed access. In a
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nutshell, tsvector is a set of unique words along with their
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positional information in the document, organized in a special
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structure optimized for fast access and lookup. This data type can
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be used as backend for efficient full text search engines.
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