Pengcheng Xiong created CALCITE-935:
---------------------------------------
Summary: Improve ReduceExpressionRule to deal with multiple
"equals to literal" in predicate
Key: CALCITE-935
URL: https://issues.apache.org/jira/browse/CALCITE-935
Project: Calcite
Issue Type: Bug
Reporter: Pengcheng Xiong
Assignee: Julian Hyde
In ReduceExpressionRule.java,
L396-397:
final ImmutableMap<RexNode, RexLiteral> constants =
predicateConstants(predicates);
The query is "select * from src where (key='12' and key is
null);" Here 'key' is a string type and it is one of the columns of 'src'
table.
Then we will have predicates [=($0, '12'), isnull($0)], which is the input of
the
predicateConstants, and the function will return "{$0='12'}"
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
