Struct WindowPlanner 

pub struct WindowPlanner;

High-level window planner that validates semantic names against metadata.

Converts WindowRequest (user-friendly semantic names) to WindowExecutionPlan (SQL expressions ready for execution).

Example

let request = WindowRequest { ... };
let metadata = FactTableMetadata { ... };
let plan = WindowPlanner::plan(request, metadata)?;
// plan now has SQL expressions like "dimensions->>'category'" instead of "category"

Implementations

impl WindowPlanner

pub fn plan( request: WindowRequest, metadata: FactTableMetadata, ) -> Result<WindowExecutionPlan>

Convert high-level WindowRequest to executable WindowExecutionPlan.

Arguments

• request - High-level window request with semantic names
• metadata - Fact table metadata for validation and expression generation

Errors

Returns error if:

• Referenced measures don’t exist in metadata
• Referenced filter columns don’t exist
• Window function field references are invalid