Specific integer types and limit-offset support #27
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rekby
reviewed
Feb 6, 2024
| def visit_FLOAT(self, type_: sa.FLOAT, **kw): | ||
| return "FLOAT" | ||
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||
| def visit_BOOLEAN(self, type_: sa.BOOLEAN, **kw): |
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I have a doubt about visit_uuid and implicit convert uuid to UTF8: YDB has own uuid type. Now it can't stored to a table, but it can be (and will sometime) in future. Then convert from uuid to UTF8 will see strange.
I suggest to not convert uuid to UTF-8 into SDK and suggest users to the conversion in customers code. It is simple as str(var)
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Discussed in offline: will solved in a separate PR
rekby
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Feb 6, 2024
| select._offset_clause, types.UInt64, skip_types=(types.UInt64, types.UInt32, types.UInt16, types.UInt8) | ||
| ) | ||
| if select._limit_clause is None: | ||
| text += "\n LIMIT NULL" |
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Why do you need explicit LIMIT NULL?
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Discussed in offline: it is needed to use OFFSET without LIMIT
rekby
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Feb 6, 2024
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Problem
Dialect don't support native usage of
limit().offset()methods due to type collision: sqlalchemy by default provide all integer bound variables as Int64, when YQL requires UInt variable to be passed to LIMIT OFFSET.In this PR
In this PR I add the optional type casting to the LIMIT OFFSET clause to allow native usage of SQLalchemy methods related to.
Bonus
Dialect was enriched with all integer YDB types.