Enze Liu created CALCITE-4733:
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Summary: `MaterializedViewAggregateRule` should not rewrite top
level name alias in project.
Key: CALCITE-4733
URL: https://issues.apache.org/jira/browse/CALCITE-4733
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.27.0
Reporter: Enze Liu
We use `MaterializedViewAggregateRule` to do optimize.
the original sql is :
{code:java}
SELECT (intDiv(ts/1000, 60) * 60) * 1000 as t, source_idc, dest_idc,
sum(jitter200)/sum(total) as `jitter200_rate` FROM metricsdb.test_table WHERE
ts/1000 >= 1627874961 AND source_idc in ('xxx') AND dest_idc IN ('xxx') GROUP
BY t,source_idc,dest_idc ORDER BY t
{code}
after optimize, the sql is :
{code:java}
SELECT `intDiv`(`ts` / 1000, 60) * 60 * 1000 AS `$f14`, `source_idc`,
`dest_idc`, SUM(`jitter200`) / SUM(`total`) AS `$f3` FROM
`metricsdb`.`s2s_idc2idc_jitter_mv_all` WHERE `ts` / 1000 >= 1627874961 AND
`source_idc` IN ('xxx') AND `dest_idc` IN ('xxx') GROUP BY `source_idc`,
`dest_idc`, `intDiv`(`ts` / 1000, 60) * 60 * 1000 ORDER BY `intDiv`(`ts` /
1000, 60) * 60 * 1000
{code}
we expected it to be :
{code:java}
`intDiv`(`ts` / 1000, 60) * 60 * 1000 AS `t`{code}
, not
{code:java}
`intDiv`(`ts` / 1000, 60) * 60 * 1000 AS `$f14`{code}
After examine the code , we found in `rewriteView` of
`MaterializedViewAggregateRule`
{code:java}
return relBuilder
.project(rewrittenExprs)
.convert(topRowType, false) // this means do not compare the names.
.build();
{code}
when change it to true, everything goes as expected.
I think the rewrite rule should maintain then same type and name , not just
type.
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