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Unable to bind a null value typed as a UUID in a PreparedStatement #1161

raubel opened this Issue Mar 28, 2018 · 1 comment


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raubel commented Mar 28, 2018

I need to bind a UUID parameter which may be null in a statement like "select * from test table where ? is null or ? = c_uuid".
Whatever approach I use, the driver rejects my request with "ERROR: could not determine data type of parameter $1".

See the code here.

When run, it gives the output below:

JDBC Driver Version: 42.2.1
PostgreSQL version: PostgreSQL 9.5.9 on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609, 64-bit
setNull(varchar) + setObject(null) => works
setNull(other) + setNull(other) => fails (ERROR: could not determine data type of parameter $1)
setNull(other, uuid) + setNull(other, uuid) => fails (ERROR: could not determine data type of parameter $1)

The third case (last line above) uses method PreparedStatement.setNull(pos, type, typeName) and should work.
But in the current implementation of the driver, the PreparedStatement.setNull(int, int, String) delegates to setNull(int, int) so that specifying the type name has no effect.

Thank you.


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davecramer commented Mar 28, 2018

duplicate of #1159 fixed in #1160

@davecramer davecramer closed this Mar 28, 2018

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