[
https://issues.apache.org/jira/browse/HIVE-24666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17270899#comment-17270899
]
Gopal Vijayaraghavan commented on HIVE-24666:
---------------------------------------------
I think for an uncasted column, this is how it gets placed.
https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/vector/VectorizationContext.java#L1942
{code}
} else if (childExpr instanceof ExprNodeColumnDesc) {
int colIndex = getInputColumnIndex((ExprNodeColumnDesc) childExpr);
if (childrenMode == VectorExpressionDescriptor.Mode.FILTER) {
VectorExpression filterExpr =
getFilterOnBooleanColumnExpression((ExprNodeColumnDesc) childExpr, colIndex);
if (filterExpr == null) {
return null;
}
children.add(filterExpr);
}
arguments[i] = colIndex;
}
{code}
> Vectorized UDFToBoolean may unable to filter rows if input is string
> --------------------------------------------------------------------
>
> Key: HIVE-24666
> URL: https://issues.apache.org/jira/browse/HIVE-24666
> Project: Hive
> Issue Type: Bug
> Components: Vectorization
> Reporter: Zhihua Deng
> Assignee: Zhihua Deng
> Priority: Minor
> Labels: pull-request-available
> Attachments: HIVE-24666.2.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> If we use cast boolean in where conditions to filter rows, in vectorization
> execution the filter is unable to filter rows, step to reproduce:
> {code:java}
> create table vtb (key string, value string);
> insert into table vtb values('0', 'val0'), ('false', 'valfalse'),('off',
> 'valoff'),('no','valno'),('vk', 'valvk');
> select distinct value from vtb where cast(key as boolean); {code}
> It's seems we don't generate a SelectColumnIsTrue to filter the rows if the
> casted type is string:
>
> https://github.com/apache/hive/blob/ff6f3565e50148b7bcfbcf19b970379f2bd59290/ql/src/java/org/apache/hadoop/hive/ql/exec/vector/VectorizationContext.java#L2995-L2996
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
