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| author | OopsOutOfMemory <victorshengli@126.com> | 2015-06-17 13:37:59 -0700 |
|---|---|---|
| committer | Michael Armbrust <michael@databricks.com> | 2015-06-17 13:37:59 -0700 |
| commit | 98ee3512b26e87eeb22693a4a61b2c4981f38ca4 (patch) | |
| tree | b6c978636f9b7ee8b8b2a9bd323cddca0303f07e /build | |
| parent | a46594435e0dd6cf86ac562bc11fc13d82b63c71 (diff) | |
| download | spark-98ee3512b26e87eeb22693a4a61b2c4981f38ca4.tar.gz spark-98ee3512b26e87eeb22693a4a61b2c4981f38ca4.tar.bz2 spark-98ee3512b26e87eeb22693a4a61b2c4981f38ca4.zip | |
[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
Diffstat (limited to 'build')
0 files changed, 0 insertions, 0 deletions