I would rather go for something like compare()
<http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.infocenter.dc36271.1572/html/blocks/X14054.htm>that
allows one to directly compare two character strings based on alternate
collation rules.
Hive does not have it. This is from SAP ASE
1> select compare ("aaa","bbb")
2> go
-----------
-1
(1 row affected)
1> select compare ("aaa","Aaa")
2> go
-----------
1
(1 row affected)
1> select compare ("aaa","AAA")
2> go
-----------
1
-
The *compare* function returns the following values, based on the collation
rules that you chose:
-
1 – indicates that *char_expression1* or *uchar_expression1* is greater
than *char_expression2* or* uchar_expression2*.
-
0 – indicates that *char_expression1* or *uchar_expression1* is equal to
*char_expression2* or* uchar_expression2*.
-
-1 – indicates that *char_expression1* or *uchar_expression1* is less
than *char_expression2 *or* uchar expression2*.
hive> select compare("aaa", "bbb");
FAILED: SemanticException [Error 10011]: Line 1:7 Invalid function 'compare'
HTH
Dr Mich Talebzadeh
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On 24 May 2016 at 21:15, mahender bigdata <mahender.bigd...@outlook.com>
wrote:
> Hi,
>
> We would like to have feature in Hive where string comparison should
> ignore case sensitivity while joining on String Columns in hive. This
> feature helps us in reducing code of calling Upper or Lower function on
> Join columns. If it is already there, please let me know settings to enable
> this feature.
>
> /MS
>
>
