PostgreSQL 8.4.2 Documentation
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# E.106. Release 7.3.17

> Release date: 2007-01-08

This release contains a variety of fixes from 7.3.16.

## E.106.1. Migration to Version 7.3.17

A dump/restore is not required for those running 7.3.X. However, if you are upgrading from a version earlier than 7.3.13, see the release notes for 7.3.13.

## E.106.2. Changes

- `to_number()` and `to_char(numeric)` are now `STABLE`, not `IMMUTABLE`, for new initdb installs (Tom)

  This is because `lc_numeric` can potentially change the output of these functions.

- Improve index usage of regular expressions that use parentheses (Tom)

  This improves psql `\d` performance also.

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