Using Statement.cancel() to cancel a running query, queries are
sometimes successfully canceled, but more often result in a broken
connection, after which all interactions result in an error such as
this:

Unknown Response Type c
at org.postgresql.core.QueryExecutor.execute(QueryExe cutor.java:123)
at
org.postgresql.jdbc1.AbstractJdbc1Connection.ExecS QL(AbstractJdbc1Connec
tion.java:505)
at
org.postgresql.jdbc1.AbstractJdbc1Statement.execut e(AbstractJdbc1Stateme
nt.java:320)
at
org.postgresql.jdbc2.AbstractJdbc2Statement.execut e(AbstractJdbc2Stateme
nt.java:48)
at
org.postgresql.jdbc1.AbstractJdbc1Statement.execut eQuery(AbstractJdbc1St
atement.java:153)

The response type code is random, implying that the client is receiving
unexpected data from the back end.

PostgreSQL 7.3.4, Sun Java2 SDK 1.4.2, Windows (Cygwin).

Alexander.


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