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https://issues.apache.org/jira/browse/HIVE-15229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Simanchal Das updated HIVE-15229:
---------------------------------
Description:
In Teradata 'like any' and 'like all' operators are mostly used when we are
matching a text field with numbers of patterns.
'like any' and 'like all' operator are equivalents of multiple like operator
like example below.
{noformat}
--like any
select col1 from table1 where col2 like any ('%accountant%', '%accounting%',
'%retail%', '%bank%', '%insurance%');
--Can be written using multiple like condition
select col1 from table1 where col2 like '%accountant%' or col2 like
'%accounting%' or col2 like '%retail%' or col2 like '%bank%' or col2 like
'%insurance%' ;
--like all
select col1 from table1 where col2 like all ('%accountant%', '%accounting%',
'%retail%', '%bank%', '%insurance%');
--Can be written using multiple like operator
select col1 from table1 where col2 like '%accountant%' and col2 like
'%accounting%' and col2 like '%retail%' and col2 like '%bank%' and col2 like
'%insurance%' ;
{noformat}
Problem statement:
Now a days so many data warehouse projects are being migrated from Teradata to
Hive.
Always Data engineer and Business analyst are searching for these two operator.
If we introduce these two operator in hive then so many scripts will be
migrated smoothly instead of converting these operators to multiple like
operators.
Result:
1. 'LIKE ANY' operator return true if a text(column value) matches to any
pattern.
2. 'LIKE ALL' operator return true if a text(column value) matches to all
patterns.
3. 'LIKE ANY' and 'LIKE ALL' returns NULL not only if the expression on the
left hand side is NULL, but also if one of the pattern in the list is NULL.
was:
In Teradata 'like any' and 'like all' operators are mostly used when we are
matching a text field with numbers of patterns.
'like any' and 'like all' operator are equivalents of multiple like operator
like example below.
{noformat}
--like any
select col1 from table1 where col2 like any ('%accountant%', '%accounting%',
'%retail%', '%bank%', '%insurance%');
--Can be written using multiple like condition
select col1 from table1 where col2 like '%accountant%' or col2 like
'%accounting%' or col2 like '%retail%' or col2 like '%bank%' or col2 like
'%insurance%' ;
--like all
select col1 from table1 where col2 like all ('%accountant%', '%accounting%',
'%retail%', '%bank%', '%insurance%');
--Can be written using multiple like operator
select col1 from table1 where col2 like '%accountant%' and col2 like
'%accounting%' and col2 like '%retail%' and col2 like '%bank%' and col2 like
'%insurance%' ;
{noformat}
Problem statement:
Now a days so many data warehouse projects are being migrated from Teradata to
Hive.
Always Data engineer and Business analyst are searching for these two operator.
If we introduce these two operator in hive then so many scripts will be
migrated smoothly instead of converting these operators to multiple like
operators.
> 'like any' and 'like all' operators in hive
> -------------------------------------------
>
> Key: HIVE-15229
> URL: https://issues.apache.org/jira/browse/HIVE-15229
> Project: Hive
> Issue Type: New Feature
> Components: Operators
> Reporter: Simanchal Das
> Assignee: Simanchal Das
> Priority: Minor
> Attachments: HIVE-15229.1.patch, HIVE-15229.2.patch
>
>
> In Teradata 'like any' and 'like all' operators are mostly used when we are
> matching a text field with numbers of patterns.
> 'like any' and 'like all' operator are equivalents of multiple like operator
> like example below.
> {noformat}
> --like any
> select col1 from table1 where col2 like any ('%accountant%', '%accounting%',
> '%retail%', '%bank%', '%insurance%');
> --Can be written using multiple like condition
> select col1 from table1 where col2 like '%accountant%' or col2 like
> '%accounting%' or col2 like '%retail%' or col2 like '%bank%' or col2 like
> '%insurance%' ;
> --like all
> select col1 from table1 where col2 like all ('%accountant%', '%accounting%',
> '%retail%', '%bank%', '%insurance%');
> --Can be written using multiple like operator
> select col1 from table1 where col2 like '%accountant%' and col2 like
> '%accounting%' and col2 like '%retail%' and col2 like '%bank%' and col2 like
> '%insurance%' ;
> {noformat}
> Problem statement:
> Now a days so many data warehouse projects are being migrated from Teradata
> to Hive.
> Always Data engineer and Business analyst are searching for these two
> operator.
> If we introduce these two operator in hive then so many scripts will be
> migrated smoothly instead of converting these operators to multiple like
> operators.
> Result:
> 1. 'LIKE ANY' operator return true if a text(column value) matches to any
> pattern.
> 2. 'LIKE ALL' operator return true if a text(column value) matches to all
> patterns.
> 3. 'LIKE ANY' and 'LIKE ALL' returns NULL not only if the expression on the
> left hand side is NULL, but also if one of the pattern in the list is NULL.
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