Better error messages when conversion would result in loss of information #148
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LaurentRDC changed the title 
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| Ahhh I didn't realize this would be a breaking change. No worries then, happy to wait. |
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Hello,
This PR gives a slightly better error message when trying to convert from a SQL type to a Haskell type that would result in a loss of information.
This arose in haskell-beam/beam#700 (comment) where conversion from SQL
NUMERICto HaskellDoublegave an error that might be confusing.