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Complete implementation of identity columns #2339

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katzyn opened this issue Dec 16, 2019 · 0 comments
Open
3 of 4 tasks

Complete implementation of identity columns #2339

katzyn opened this issue Dec 16, 2019 · 0 comments

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@katzyn
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katzyn commented Dec 16, 2019 •
edited

H2 partially supports the identity columns from the Standard. There are some incompatibilities:

  • H2 converts them to a plain columns with DEFAULT expression; but their identity status should be preserved.

  • GENERATED ALWAYS shouldn't be the same as GENERATED BY DEFAULT.

  • The Standard allows only one identity column per table.

  • Attempt to insert NULL into GENERATED BY DEFAULT column should throw exception instead of generation of value.
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