[CALCITE-3115] Cannot add JdbcRules which have different JdbcConvention to same VolcanoPlanner's RuleSet.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.19.0
• Fix Version/s: 1.21.0
• Component/s: core
• Labels: pull-request-available
• Assignee: Igor Guzenko
• Reporter: TANG Wen-hui
• Created: 06/Jun/19 08:51
• Updated: 24/Jan/24 06:45
• Resolved: 02/Sep/19 12:13

Description

When we use Calcite via JDBC to run a sql which involves two difference jdbc schema:

select * from (select "a",max("b") as max_b, sum("c") as sum_c from "test"."temp" where "d" > 10 or "b" <> 'hello' group by "a", "e", "f" having "a" > 100 and max("b") < 20 limit 10) t  union select "a", "b","c" from "test2"."temp2" group by "a","b","c" 

the sql get a plan like that:

EnumerableUnion(all=[false])
  JdbcToEnumerableConverter
    JdbcProject(a=[$0], MAX_B=[$3], SUM_C=[$4])
      JdbcSort(fetch=[10])
        JdbcFilter(condition=[<(CAST($3):BIGINT, 20)])
          JdbcAggregate(group=[{0, 4, 5}], MAX_B=[MAX($1)], SUM_C=[SUM($2)])
            JdbcFilter(condition=[AND(OR(>($3, 10), <>($1, 'hello')), >($0, 100))])
              JdbcTableScan(table=[[test, temp]])
  EnumerableAggregate(group=[{0, 1, 2}])
    JdbcToEnumerableConverter
      JdbcTableScan(table=[[test2, temp2]])

And the EnumerableAggregate for table test2.temp2 cannot be converted to JdbcAggregate.

Issue Links

• fixes: CALCITE-6216 The JDBC adapter is unable to push down queries when a query involves multiple data sources
• relates to: DRILL-7340 Filter is not pushed to JDBC database when several databases are used in the query
• links to: GitHub Pull Request #1257
• links to: GitHub Pull Request #1397