rabosh-query/app.oreshkov.rabosh.query/Explain

Explain

How a query would be answered.

The reason this exists rather than being left to a debugger is the one IndexCandidate.reason already makes: a decision that cannot say what it was based on is one nobody can argue with. It is also the instrument the work-assertion tests use to say which index a plan chose and in what order it intersects, which is a fact about the plan rather than a stopwatch reading.

Properties

projectsFromColumns

val projectsFromColumns: Boolean

Whether every projected field is bound to a shredded column that can reconstruct it exactly.

val query: Query

val scansUnflushed: Boolean

segmentsIndexed

val segmentsIndexed: Int

segmentsScanned

val segmentsScanned: Int

val sources: List<ExplainSource>

Sources in the order the intersection would run them: cheapest first.

val usesIndexes: Boolean

Whether this plan reads any sidecar at all.

Functions

fun render(): String

open override fun toString(): String