case class InlineCTE(alwaysInline: Boolean = false) extends Rule[LogicalPlan] with Product with Serializable
Inlines CTE definitions into corresponding references if either of the conditions satisfies: 1. The CTE definition does not contain any non-deterministic expressions or contains attribute references to an outer query. If this CTE definition references another CTE definition that has non-deterministic expressions, it is still OK to inline the current CTE definition. 2. The CTE definition is only referenced once throughout the main query and all the subqueries.
CTE definitions that appear in subqueries and are not inlined will be pulled up to the main query level.
- alwaysInline
if true, inline all CTEs in the query plan.
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new
InlineCTE(alwaysInline: Boolean = false)
- alwaysInline
if true, inline all CTEs in the query plan.
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final
def
!=(arg0: Any): Boolean
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final
def
##(): Int
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final
def
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- val alwaysInline: Boolean
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def
buildCTEMap(plan: LogicalPlan, cteMap: Map[Long, (CTERelationDef, Int, Map[Long, Int])], outerCTEId: Option[Long] = None): Unit
Accumulates all the CTEs from a plan into a special map.
Accumulates all the CTEs from a plan into a special map.
- plan
The plan to collect the CTEs from
- cteMap
A mutable map that accumulates the CTEs and their reference information by CTE ids. The value of the map is tuple whose elements are:
- The CTE definition
- The number of incoming references to the CTE. This includes references from other CTEs and regular places.
- A mutable inner map that tracks outgoing references (counts) to other CTEs.
- outerCTEId
While collecting the map we use this optional CTE id to identify the current outer CTE.
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def
conf: SQLConf
The active config object within the current scope.
The active config object within the current scope. See SQLConf.get for more information.
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log: Logger
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ruleId: RuleId
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ruleName: String
Name for this rule, automatically inferred based on class name.
Name for this rule, automatically inferred based on class name.
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