[
https://issues.apache.org/jira/browse/HIVE-17009?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Timothy Miron updated HIVE-17009:
---------------------------------
Description:
Error "Invalid function 'nullif'" thrown if nullif() used in conjunction with
certain other commands, but equivalently behaving CASE WHEN ... END block
behaves fine.
Example:
(note the use of `dual` table)
This throws an {color:#ff0000}"Invalid function 'nullif'" error{color}
seemingly due to the presence of operators (date_sub()) in the WHERE clause:
{code:sql}
select
coalesce(nullif('a','a'),'b') result_value
from
workspace_t886880.dual
where current_date > date_sub(current_date,1);
{code}
As well as simply attaching 'EXPLAIN' like this (throws the same error):
{code:sql}
EXPLAIN select
coalesce(nullif('a','a'),'b') result_value
from
workspace_t886880.dual
{code}
However, this similarly behaving CASE..WHEN block does
{color:#14892c}not{color} throw an error, even with the same where clause as
above:
{code:sql}
select
coalesce(case when 'a' = 'a' then null else 'a' end,'b') result_value
from
workspace_t886880.dual
where current_date > date_sub(current_date,1);
{code}
Similarly, omitting any where clause returns functionality to normal, as does
removing any _operations _from the where clause also {color:#14892c}allows
{color}the query to execute:
{code:sql}
/* this works */
select
coalesce(nullif('a','a'),'b') result_value
from
workspace_t886880.dual;
/* no where clause! */
/* and this works too */
select
coalesce(nullif('a','a'),'b') result_value
from
workspace_t886880.dual
where DATE '2016-01-02' > DATE '2016-01-01'
{code}
was:
Error "Invalid function 'nullif'" thrown if nullif() used in conjunction with
certain other commands, but equivalently behaving CASE WHEN ... END block
behaves fine.
Example:
(note the use of `dual` table)
# This throws an {color:#ff0000}"Invalid function 'nullif'" error{color}:
{code:sql}
select
coalesce(nullif('a','a'),'b') result_value
from
workspace_t886880.dual
where current_date > date_sub(current_date,1);
{code}
As well as simply attaching 'EXPLAIN' like this:
{code:sql}
EXPLAIN select
coalesce(nullif('a','a'),'b') result_value
from
workspace_t886880.dual
{code}
# This similarily behaving CASE..WHEN block does {color:#14892c}not{color}
throw an error:
{code:sql}
select
coalesce(case when 'a' = 'a' then null else 'a' end,'b') result_value
from
workspace_t886880.dual
where current_date > date_sub(current_date,1);
{code}
Similarly, omitting any where clause returns functionality to normal, as does
removing any _operations _from the where clause also {color:#14892c}allows
{color}the query to execute:
{code:sql}
/* this works */
select
coalesce(nullif('a','a'),'b') result_value
from
workspace_t886880.dual;
/* no where clause! */
/* and this works too */
select
coalesce(nullif('a','a'),'b') result_value
from
workspace_t886880.dual
where DATE '2016-01-02' > DATE '2016-01-01'
{code}
> ifnull() compatibility with explain or use of constants
> -------------------------------------------------------
>
> Key: HIVE-17009
> URL: https://issues.apache.org/jira/browse/HIVE-17009
> Project: Hive
> Issue Type: Bug
> Components: Hive, SQL
> Affects Versions: 1.2.1
> Environment: Running hive queries from Toad Data Point 4.2 via ODBC
> connection.
> Reporter: Timothy Miron
>
> Error "Invalid function 'nullif'" thrown if nullif() used in conjunction with
> certain other commands, but equivalently behaving CASE WHEN ... END block
> behaves fine.
> Example:
> (note the use of `dual` table)
> This throws an {color:#ff0000}"Invalid function 'nullif'" error{color}
> seemingly due to the presence of operators (date_sub()) in the WHERE clause:
> {code:sql}
> select
> coalesce(nullif('a','a'),'b') result_value
> from
> workspace_t886880.dual
> where current_date > date_sub(current_date,1);
> {code}
> As well as simply attaching 'EXPLAIN' like this (throws the same error):
> {code:sql}
> EXPLAIN select
> coalesce(nullif('a','a'),'b') result_value
> from
> workspace_t886880.dual
> {code}
> However, this similarly behaving CASE..WHEN block does
> {color:#14892c}not{color} throw an error, even with the same where clause as
> above:
> {code:sql}
> select
> coalesce(case when 'a' = 'a' then null else 'a' end,'b') result_value
> from
> workspace_t886880.dual
> where current_date > date_sub(current_date,1);
> {code}
> Similarly, omitting any where clause returns functionality to normal, as does
> removing any _operations _from the where clause also {color:#14892c}allows
> {color}the query to execute:
> {code:sql}
> /* this works */
> select
> coalesce(nullif('a','a'),'b') result_value
> from
> workspace_t886880.dual;
> /* no where clause! */
> /* and this works too */
> select
> coalesce(nullif('a','a'),'b') result_value
> from
> workspace_t886880.dual
> where DATE '2016-01-02' > DATE '2016-01-01'
> {code}
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