Julian Hyde created CALCITE-1083:
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Summary: SqlNode.equalsDeep has O(n ^ 2) performance
Key: CALCITE-1083
URL: https://issues.apache.org/jira/browse/CALCITE-1083
Project: Calcite
Issue Type: Bug
Reporter: Julian Hyde
Assignee: Julian Hyde
SqlNode.equalsDeep has O(n ^ 2) performance. It shows up while running
SqlValidatorTest.testLarge on "select from emp where <large expression> > 5".
This is because we call {{litmus.fail(e + " != " + e2)}} and construct a large
string, even though the particular implementation of Litmus is not interested
in the string.
Solution is to change {{Litmus.fail(String message)}} to {{Litmus.fail(String
message, Object... args)}}, so that {{fail}} can lazily construct messages. The
same as SLF4J Logger does.
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