OopsOutOfMemory 98ee3512b2 [SPARK-8010] [SQL] Promote types to StringType as implicit conversion in non-binary expression of HiveTypeCoercion ... 1. Given a query `select coalesce(null, 1, '1') from dual` will cause exception: java.lang.RuntimeException: Could not determine return type of Coalesce for IntegerType,StringType 2. Given a query: `select case when true then 1 else '1' end from dual` will cause exception: java.lang.RuntimeException: Types in CASE WHEN must be the same or coercible to a common type: StringType != IntegerType I checked the code, the main cause is the HiveTypeCoercion doesn't do implicit convert when there is a IntegerType and StringType. Numeric types can be promoted to string type Hive will always do this implicit conversion. Author: OopsOutOfMemory <victorshengli@126.com> Closes #6551 from OopsOutOfMemory/pnts and squashes the following commits: 7a209d7 [OopsOutOfMemory] rebase master 6018613 [OopsOutOfMemory] convert function to method 4cd5618 [OopsOutOfMemory] limit the data type to primitive type df365d2 [OopsOutOfMemory] refine 95cbd58 [OopsOutOfMemory] fix style 403809c [OopsOutOfMemory] promote non-string to string when can not found tighestCommonTypeOfTwo		2015-06-17 13:37:59 -07:00
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src	[SPARK-8010] [SQL] Promote types to StringType as implicit conversion in non-binary expression of HiveTypeCoercion	2015-06-17 13:37:59 -07:00
pom.xml	[SPARK-7743] [SQL] Parquet 1.7	2015-06-04 11:32:03 -07:00