Descargar PostgreSQL 9.4.0

PostgreSQL 9.4.0

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# Major enhancements in PostgreSQL 9.4 include:
- Add jsonb, a more capable and efficient data type for storing JSON data
- Add new SQL command ALTER SYSTEM for changing postgresql.conf configuration file entries
- Reduce lock strength for some ALTER TABLE commands
- Allow materialized views to be refreshed without blocking concurrent reads
- Add support for logical decoding of WAL data, to allow database changes to be streamed out in a customizable format
- Allow background worker processes to be dynamically registered, started and terminated