🥮 mooncakes.io
    Sign in

    superbigcup325/moonlake/engine does not have a README file

    BoundQuery

    source
    pub struct BoundQuery {
      // private fields
    } derive(
    Debug    )

    The bound query, ready for the executor.

    BoundQuery::to_repr

    source

    ExecOptions

    source
    pub(all) struct ExecOptions {
      budget : Int
      spill : SpillStore?
    }

    ExecOptions::in_memory

    source
    fn ExecOptions::in_memory() -> ExecOptions

    Default options: unlimited memory, no spill store — the historical in-memory behavior.

    PhysExpr

    source
    pub(all) enum PhysExpr {
      ColRef(Int, 
    DataType    )
      Const(
    Scalar    )
      Promote(PhysExpr, 
    DataType    )
      ArithE(
    ArithOp    , PhysExpr, PhysExpr, 
    DataType    )
      CmpE(
    CmpOp    , PhysExpr, PhysExpr)
      AndE(PhysExpr, PhysExpr)
      OrE(PhysExpr, PhysExpr)
      NotE(PhysExpr)
      LikeE(PhysExpr, String)
      IsNullE(PhysExpr, Bool)
      ExtractE(PhysExpr, 
    ExtractField    )
      InSetE(PhysExpr, Map[String, Bool], Bool, Bool)
      CaseE(Array[(PhysExpr, PhysExpr)], PhysExpr?, 
    DataType    )
      FuncE(String, Array[PhysExpr], 
    DataType    )
      CastE(PhysExpr, 
    DataType    )
      DateArithE(PhysExpr, Int64, 
    IntervalUnit    )
      WinRef(Int, 
    DataType    )
    } derive(
    Debug    )

    PhysExpr::to_repr

    source

    SelectResult

    source
    pub struct SelectResult {
      // private fields
    }

    SelectResult::batch

    source

    SelectResult::get

    source

    Scalar cell accessor for result consumption (row, column).

    SelectResult::names

    source
    fn SelectResult::names(self : SelectResult) -> Array[String]

    SelectResult::row_count

    source
    fn SelectResult::row_count(self : SelectResult) -> Int

    SelectResult::to_json

    source
    fn SelectResult::to_json(self : SelectResult) -> String

    Whole result as one JSON array line. Strings are escaped; SQL NULL becomes null. DATE renders as a quoted calendar date (DuckDB's own JSON spelling), not a bare epoch integer.

    SelectResult::types

    source

    SpillStore

    source
    pub(all) struct SpillStore {
      write : (Bytes) -> Int raise 
    SqlError
      read : (Int) -> Bytes raise 
    SqlError
      remove : (Int) -> Unit raise 
    SqlError
    }

    Storage for spilled intermediate state (sorted runs today). Ids are opaque and scoped to one query; the engine removes everything it wrote when the query ends, successfully or not.

    eval_scalar

    source

    eval_vec

    source

    explain

    source

    Render the physical plan without executing it: join steps with pushdown classification, aggregation, projection, ordering.

    explain_analyze

    source

    Run the query and render the physical plan annotated with the actual row counts each stage produced — scans, join outputs, aggregate groups and the final result. No clocks: row counts are the deterministic part of ANALYZE.

    run_select

    source

    run_select_opts

    source

    Execute with explicit options (memory budget + spill store).

    Source Files

    Powered by MoonBit

    Site sourceReport issuePackagesBuild queueSkillsStatistics

    © 2026 mooncakes.io