Incorrect "to_char" function in HSQL Dialect in Hibernate 4

Solution Verified - Updated -

Issue

We're comparing a "to_char" construct that gets a Calendar as parameter to a String. The "to_char" converts the Calendar to a String, making it possible to compare it with a String. For me it looks like Hibernate
doesn't get that "to_char" makes that conversion and only sees that there's a Calendar (within the "to_char") on the left hand side and a String parameter on the right hand side and decides (erroneously) that a comparison between the two is invalid.

Environment

  • JBoss Enterprise Application Platform (EAP) 6.0
  • Hibernate 4.{0,1}

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