mirror of https://github.com/apache/druid.git
175636b28f
This patch adds "TypeCastSelectors", which is used when writing frames to perform two coercions: - When a numeric type is desired and the underlying type is non-numeric or unknown, the underlying selector is wrapped, "getObject" is called and the result is coerced using "ExprEval.ofType". This differs from the prior behavior where the primitive methods like "getLong", "getDouble", etc, would be called directly. This fixes an issue where a column would be read as all-zeroes when its SQL type is numeric and its physical type is string, which can happen when evolving a column's type from string to number. - When an array type is desired, the underlying selector is wrapped, "getObject" is called, and the result is coerced to Object[]. This coercion replaces some earlier logic from #15917. |
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