[CALCITE-3661] Derive rowCount statistics for tables in ReflectiveSchema that are based on arrays/collections

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.21.0
• Component/s: core
• Assignee: Unassigned
• Reporter: Vladimir Sitnikov
• Created: 01/Jan/20 20:22
• Updated: 14/Nov/20 21:52

Description

ReflectiveSchema is used quite common in Calcite tests, however, it misses statistics, so every reflective table is assumed to have 100 rows which makes it hard to understand if the optimizer is making reasonable decisions (e.g. join ordering).