Ziwei Liu created CALCITE-4910:
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Summary: Enhance simplify to reduce ((a or d) and (a or c) and a
and b) to (a and b)
Key: CALCITE-4910
URL: https://issues.apache.org/jira/browse/CALCITE-4910
Project: Calcite
Issue Type: Improvement
Reporter: Ziwei Liu
Considering this condition, (a or d) and (a or c) and a and b. This condition
can be simplified to a and b, but now simplify can not do this.
This case is found out by materialized view test:
materialized view: select 'a',\"empid\",\"deptno\",\"salary\" as s from
\"emps\" where (replace(\"name\",'\\2','a') is not null or
replace(\"name\",'a[[:alpha:]]{5}','c') is not null) and
(replace(\"name\",'[[:blank:]][[:alnum:]]*','b') is not null or
replace(\"name\",'(.*)(.)$','d') is not null)
query: select \"salary\" +1 as s,\"deptno\" from \"emps\" where
replace(\"name\",'[[:blank:]][[:alnum:]]*','b' ) is not null and
replace(\"name\",'a[[:alpha:]]{5}','c') is not null and \"salary\">10
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