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Ya existe el manejo de Assertions en postreSQL 7.4 o version superior?

From: tania gutierrez <tanitamile(at)yahoo(dot)com>
To: pgsql-es-ayuda(at)postgresql(dot)org
Subject: Ya existe el manejo de Assertions en postreSQL 7.4 o version superior?
Date: 2006-01-31 02:11:02
Message-ID: 20060131021102.20595.qmail@web52915.mail.yahoo.com (view raw or flat)
Thread:
Lists: pgsql-es-ayuda
Saludos listeros,
   
  Quisiera saber si Ya existe el manejo de Assertions en postreSQL 7.4 o version superior?
  lei en esta pagina que todavia no, pero si tienen informacion les agradezco:
   
  http://www.redhat.com/docs/manuals/database/RHDB-7.1.3-Manual/sql/sql-createtable.html
    CONSTRAINT clause   SQL92 specifies some additional capabilities for constraints, and also defines assertions and domain constraints. 
  An assertion is a special type of integrity constraint and shares the same namespace as other constraints. However, an assertion is not necessarily dependent on one particular table as constraints are, so SQL-92 provides the CREATE ASSERTION statement as an alternate method for defining a constraint: 
        
CREATE ASSERTION name CHECK ( condition )  

   
  Gracias:
   
  Tania

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