[CALCITE-711] Cardinality provider for use by lattice algorithm

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Assignee: Julian Hyde
• Reporter: Julian Hyde
• Created: 04/May/15 17:51
• Updated: 12/May/15 01:29
• Resolved: 12/May/15 01:29

Description

Define a cardinality provider SPI for use by the lattice recommendation algorithm. Also:

• Obsolete Lattice.CARDINALITY_MAP (by wrapping it in a mock provider).
• Create a JDBC cardinality provider, that gets cardinality by executing "count(distinct ...)".

Issue Links

• duplicates: CALCITE-429 Add statistics SPI for lattice optimization algorithm