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From Dima Fomin <>
Subject ArrowNotImplementedError: No cast implemented from decimal(2,2) to decimal(12,2)
Date Thu, 24 Oct 2019 12:47:10 GMT
<div>Hello!</div><div>First of all thank you very much for your efforts on
Apache Arrow! This looks very useful and prominent tech to be able use it in self-BI area.</div><div> </div><div>I
faced such issues - get Subj Error</div><blockquote><div>ArrowNotImplementedError:
No cast implemented from decimal(2,2) to decimal(12,2)</div></blockquote><div>when
trying to <em>pyarrow.Table.from_batches</em> array of values defined in schema
as <em>pyarrow.decimal128(12,2)</em>.</div><div> </div><div>Which
values are in fact column of <em>sqlAlchemy.sql.sqltypes.DECIMAL()="DECIMAL(precision=12,scale=2)"</em>
values, which I map in schema like this <em>pyarrow.decimal128(12,2)</em>.</div><div> </div><div>What
could be a reason of issue?</div><div>Could it be that somehow declared decimal
type of data is reduced to minimum value which met in data? :/</div><div> </div><div>With
best regards,</div><div>Dima Fomin</div>

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