[hibernate-issues] [Hibernate-JIRA] Created: (HHH-7060) Add support for mode that causes SQL Server dialect to treat application as semantically authoritative in regards to Java types and their value ranges
Add support for mode that causes SQL Server dialect to treat application as semantically
authoritative in regards to Java types and their value ranges
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Key: HHH-7060
URL: https://hibernate.onjira.com/browse/HHH-7060
Project: Hibernate ORM
Issue Type: Bug
Components: core
Affects Versions: 4.1.0
Reporter: John Verhaeg
Assignee: John Verhaeg
In particular, there is a disconnect between the value ranges supported by bytes in Java
vs. SQL Server: Java byte values are 1 byte, unsigned, while SQL Server values are 0-255.
Previously, negative byte values stored in the Java model would be treated as unsigned
bytes by the driver, allowing the reading and writing of such values to "work"
from the standpoint of the application, but also resulting in a completely different
positive value being stored within the database. HHH-6815 addressed this disconnect from
the standpoint of ensuring values set in the Java model were kept semantically in tact
within the database and forcing the use of SMALL_INT columns instead of TINY_INT columns
for byte values. However, this solution assumes it's important that the database
values exactly match what's in the Java model. It also does not allow for existing
databases with existing TINY_INT columns, which end up experiencing exceptions when
negative byte values are persisted and later retrieved. The proposed solution is to offer
some type of mode that can be set by the user to indicate the Java model should be treated
as authoritative wrt data values, which would cause Hibernate to perform as it did in
previous releases.
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