Invalid cast on NUMERICs with scale of 0 using Postgres JDBC 8.2+
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Key: CAY-1052
URL: https://issues.apache.org/cayenne/browse/CAY-1052
Project: Cayenne
Issue Type: Bug
Components: Cayenne Core Library
Affects Versions: 1.2 [STABLE], 2.0 [STABLE], 3.0
Environment: All
Reporter: Dave Dombrosky
Assignee: Andrus Adamchik
A change was recently made in the Postgres JDBC driver, versions 8.2 and up,
that makes some of the Cayenne code do the wrong thing now.
In the TypesMapping class, there is the following code:
if (type == Types.NUMERIC && precision == 0) {
type = Types.INTEGER;
}
This code no longer works right on the newer drivers because the behavior of
the ResultSetMetaData.getScale() method was changed. It used to return "-1"
for NUMERICs where it could not determine the scale, but now it returns "0".
So values with decimal information are being truncated to integers. Please
reference the following thread for more detail on the return value change:
http://groups.google.com/group/pgsql.interfaces.jdbc/browse_thread/thread/ee82d41155147672
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