OpenACS

By this change, one can now define a default dbn at the creation time

of a database connection object. Before, it was necessary to pass

the "-dbn" value to every single command. The parameter can still be

used for particular queries as before to overrule the default.

Example for defining a connection context to a pool named "legacy"

using the PostgreSQL database interface

  ::xo::db::DB-postgresql create ::xo::dc1 -dialect postgresql -dbn legacy

  lappend _ [::xo::dc1 get_value . {select count(*) from acs_objects}]

  lappend _ [::xo::dc get_value . {select count(*) from acs_objects}]

  #> 660 51606

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