There are several reasons as follows:
1
1. The HBM file association in spring is not configured well.
2. The fields in the HBM file are missing.
Solution:
1. Add fully qualified domain name when writing HQL (not recommended)
2. Configure HBM Association in spring (20 has been like this for several times)
in this paper, we introduce a new method to configure HBM Association in spring
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