Matthew Jacobs created IMPALA-5821:
--------------------------------------
Summary: Improve printing predicate constants in plan
Key: IMPALA-5821
URL: https://issues.apache.org/jira/browse/IMPALA-5821
Project: IMPALA
Issue Type: Improvement
Components: Frontend
Affects Versions: Impala 2.8.0
Reporter: Matthew Jacobs
Priority: Minor
In this plan, it wasn't clear that the constant in the predicate was being
evaluated to a double. Then the lhs required an implicit cast, and the
predicate couldn't be pushed to Kudu:
{code}
[localhost:21000] > explain select * from functional_kudu.alltypestiny where
bigint_col < 1000 / 100;
Query: explain select * from functional_kudu.alltypestiny where bigint_col <
1000 / 100
+---------------------------------------------+
| Explain String |
+---------------------------------------------+
| Per-Host Resource Reservation: Memory=0B |
| Per-Host Resource Estimates: Memory=10.00MB |
| Codegen disabled by planner |
| |
| PLAN-ROOT SINK |
| | |
| 00:SCAN KUDU [functional_kudu.alltypestiny] |
| predicates: bigint_col < 10 |
+---------------------------------------------+
{code}
We should make it more clear by printing this as a double, e.g.
predicates: bigint_col < 10.0
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