Quanlong Huang created IMPALA-15098:
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Summary: Canonicalize more kinds of expressions
Key: IMPALA-15098
URL: https://issues.apache.org/jira/browse/IMPALA-15098
Project: IMPALA
Issue Type: Improvement
Components: Frontend
Reporter: Quanlong Huang
Assignee: Quanlong Huang
Currently the expression canonicalization just deal with a small set of
predicates like InPredicate, BinaryPredicate. Canonicalization on other
expressions depend on ExprRewriter during analysis, e.g. converting "1 = a" to
"a = 1".
We should at least canonicalize disjuncts like "a = 1 OR b = 2" so it matches
"b = 2 OR a = 1" in EXPR_REWRITE strategy.
We should also handle common complex predicates on string partition columns for
dates, e.g. canonicalize "substr(p, 1, 4) = '2025'" to "substr(p, 1, 4) =
<CONST>" in
IGNORE_PARTITION_CONSTANTS strategy.
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