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Adam Kennedy updated CALCITE-5649: ---------------------------------- Fix Version/s: 1.35.0 > Produce row count statistics from ReflectiveSchema for array based tables > ------------------------------------------------------------------------- > > Key: CALCITE-5649 > URL: https://issues.apache.org/jira/browse/CALCITE-5649 > Project: Calcite > Issue Type: Improvement > Components: core > Affects Versions: 1.34.0 > Reporter: Adam Kennedy > Assignee: Adam Kennedy > Priority: Minor > Labels: pull-request-available > Fix For: 1.35.0 > > Time Spent: 10m > Remaining Estimate: 0h > > When testing new Calcite implementations it is easy to use (and several > online examples indeed use) a trivial reflected synthetic schema such as the > following: > {code:java} > public Schema getSchema() { > return new ReflectiveSchema(new PeopleSchema()); > } > public static final class PeopleSchema { > public final Person[] heroes = { > new Person("Ironman", 12), > new Person("Batman", 10) > }; > public static class Person { > public final String name; > public final int age; > public Person(final String name, final int age) { > this.name = name; > this.age = age; > } > } > } > {code} > While this works for some basics, the lack of statistics makes it less useful > than it could be. While not all variations supported by ReflectiveSchema can > easily capture statistics, the variation which provides the table as an array > has trivial access to a valid RowCount value. > For these simple cases ReflectiveSchema should provide a Statistic object > with a valid row count so the simple synthetic schemas will be more useful. -- This message was sent by Atlassian Jira (v8.20.10#820010)