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https://issues.apache.org/jira/browse/CALCITE-7413?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mihai Budiu resolved CALCITE-7413.
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Fix Version/s: 1.42.0
Resolution: Fixed
Fixed in
[https://github.com/apache/calcite/commit/dd34021fbc30381e8f20fb51666cef9e6c69d3e6]
Thank you for the bug report and contribution [~terran2010]
> Add Concat and Substring function (enabled in Mongodb library)
> ---------------------------------------------------------------
>
> Key: CALCITE-7413
> URL: https://issues.apache.org/jira/browse/CALCITE-7413
> Project: Calcite
> Issue Type: New Feature
> Components: mongodb-adapter
> Affects Versions: 1.41.0
> Reporter: terran2010
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.42.0
>
>
> The SQL：
> {code}
> SELECT city || ' ' || state from zips{code}
> Currently reporting errors：
> {code:java}
> Caused by: java.lang.IllegalStateException: Unable to implement
> EnumerableCalc(expr#0..1=[{inputs}], EXPR$0=[$t0]): rowcount = 100.0,
> cumulative cost = {135.0 rows, 800.6170185988092 cpu, 0.0 io}, id = 63
> MongoToEnumerableConverter: rowcount = 100.0, cumulative cost = {35.0 rows,
> 500.6170185988092 cpu, 0.0 io}, id = 61
> MongoSort(sort0=[$1], dir0=[ASC]): rowcount = 100.0, cumulative cost =
> {25.0 rows, 490.6170185988092 cpu, 0.0 io}, id = 59
> MongoProject(EXPR$0=[||(||(CAST(ITEM($0, 'city')):VARCHAR(20), ' '),
> CAST(ITEM($0, 'state')):VARCHAR(2))], POP=[CAST(ITEM($0, 'pop')):INTEGER]):
> rowcount = 100.0, cumulative cost = {20.0 rows, 30.1 cpu, 0.0 io}, id = 57
> MongoTableScan(table=[[mongo_raw, zips]]): rowcount = 100.0,
> cumulative cost = {10.0 rows, 10.100000000000001 cpu, 0.0 io}, id = 13
> {code}
> The SQL：
> {code:java}
> SELECT SUBSTRING(city FROM 1 FOR 2) from zips {code}
> Currently reporting errors：
> {code:java}
> Caused by: java.lang.IllegalStateException: Unable to implement
> EnumerableCalc(expr#0..1=[{inputs}], EXPR$0=[$t0]): rowcount = 100.0,
> cumulative cost = {135.0 rows, 800.6170185988092 cpu, 0.0 io}, id = 63
> MongoToEnumerableConverter: rowcount = 100.0, cumulative cost = {35.0 rows,
> 500.6170185988092 cpu, 0.0 io}, id = 61
> MongoSort(sort0=[$1], dir0=[ASC]): rowcount = 100.0, cumulative cost =
> {25.0 rows, 490.6170185988092 cpu, 0.0 io}, id = 59
> MongoProject(EXPR$0=[SUBSTRING(CAST(ITEM($0, 'city')):VARCHAR(20), 1,
> 2)], POP=[CAST(ITEM($0, 'pop')):INTEGER]): rowcount = 100.0, cumulative cost
> = {20.0 rows, 30.1 cpu, 0.0 io}, id = 57
> MongoTableScan(table=[[mongo_raw, zips]]): rowcount = 100.0,
> cumulative cost = {10.0 rows, 10.100000000000001 cpu, 0.0 io}, id = 13
> {code}
> We can consider increasing support for the Concat and Substring function，
> Because it is frequently used
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