The following bug has been logged on the website:
Bug reference: 7715
Logged by: Ian Dees
Email address: ian.dees@gmail.com
PostgreSQL version: 9.1.6
Operating system: Ubuntu 11.04
Description: =
Currently the hstore documentation [0] says "hstore has GiST and GIN index
support for the @>, ?, ?& and ?| operators", but the "?" character is a
special character in JDBC and JDBC always tries to replace it with a
parameter [1]. Because of the intermingling of these two issues, it's
impossible to use the index when querying an hstore row using JDBC with the
"?" operator.
[0] http://www.postgresql.org/docs/9.1/static/hstore.html
[1]
http://stackoverflow.com/questions/11940401/escaping-hstore-contains-operat=
ors-in-a-jdbc-prepared-statement
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