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object SubExprUtils extends PredicateHelper

Linear Supertypes
PredicateHelper, Logging, AliasHelper, AnyRef, Any
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  1. SubExprUtils
  2. PredicateHelper
  3. Logging
  4. AliasHelper
  5. AnyRef
  6. Any
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Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def buildBalancedPredicate(expressions: Seq[Expression], op: (Expression, Expression) ⇒ Expression): Expression

    Builds a balanced output predicate in bottom up approach, by applying binary operator op pair by pair on input predicates exprs recursively.

    Builds a balanced output predicate in bottom up approach, by applying binary operator op pair by pair on input predicates exprs recursively. Example: exprs = [a, b, c, d], op = And, returns (a And b) And (c And d) exprs = [a, b, c, d, e, f], op = And, returns ((a And b) And (c And d)) And (e And f)

    Attributes
    protected
    Definition Classes
    PredicateHelper
  6. def canEvaluate(expr: Expression, plan: LogicalPlan): Boolean

    Returns true if expr can be evaluated using only the output of plan.

    Returns true if expr can be evaluated using only the output of plan. This method can be used to determine when it is acceptable to move expression evaluation within a query plan.

    For example consider a join between two relations R(a, b) and S(c, d).

    - canEvaluate(EqualTo(a,b), R) returns true - canEvaluate(EqualTo(a,c), R) returns false - canEvaluate(Literal(1), R) returns true as literals CAN be evaluated on any plan

    Attributes
    protected
    Definition Classes
    PredicateHelper
  7. def canEvaluateWithinJoin(expr: Expression): Boolean

    Returns true iff expr could be evaluated as a condition within join.

    Returns true iff expr could be evaluated as a condition within join.

    Attributes
    protected
    Definition Classes
    PredicateHelper
  8. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  9. def containsOuter(e: Expression): Boolean

    Returns true when an expression contains correlated predicates i.e outer references and returns false otherwise.

  10. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  11. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  12. def extractPredicatesWithinOutputSet(condition: Expression, outputSet: AttributeSet): Option[Expression]

    Returns a filter that its reference is a subset of outputSet and it contains the maximum constraints from condition.

    Returns a filter that its reference is a subset of outputSet and it contains the maximum constraints from condition. This is used for predicate pushdown. When there is no such filter, None is returned.

    Attributes
    protected
    Definition Classes
    PredicateHelper
  13. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  14. def findExpressionAndTrackLineageDown(exp: Expression, plan: LogicalPlan): Option[(Expression, LogicalPlan)]

    Find the origin of where the input references of expression exp were scanned in the tree of plan, and if they originate from a single leaf node.

    Find the origin of where the input references of expression exp were scanned in the tree of plan, and if they originate from a single leaf node. Returns optional tuple with Expression, undoing any projections and aliasing that has been done along the way from plan to origin, and the origin LeafNode plan from which all the exp

    Definition Classes
    PredicateHelper
  15. def getAliasMap(exprs: Seq[NamedExpression]): AttributeMap[Alias]
    Attributes
    protected
    Definition Classes
    AliasHelper
  16. def getAliasMap(plan: Aggregate): AttributeMap[Alias]
    Attributes
    protected
    Definition Classes
    AliasHelper
  17. def getAliasMap(plan: Project): AttributeMap[Alias]
    Attributes
    protected
    Definition Classes
    AliasHelper
  18. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  19. def getCorrelatedPredicates(plan: LogicalPlan): Seq[Expression]

    Returns the correlated predicates from a logical plan.

    Returns the correlated predicates from a logical plan. The OuterReference wrapper is removed before returning the predicate to the caller.

  20. def getOuterReferences(plan: LogicalPlan): Seq[Expression]

    Returns all the expressions that have outer references from a logical plan.

    Returns all the expressions that have outer references from a logical plan. Currently only Filter operator can host outer references.

  21. def getOuterReferences(expr: Expression): Seq[Expression]

    Given an expression, returns the expressions which have outer references.

    Given an expression, returns the expressions which have outer references. Aggregate expressions are treated in a special way. If the children of aggregate expression contains an outer reference, then the entire aggregate expression is marked as an outer reference. Example (SQL):

    SELECT a FROM l GROUP by 1 HAVING EXISTS (SELECT 1 FROM r WHERE d < min(b))

    In the above case, we want to mark the entire min(b) as an outer reference OuterReference(min(b)) instead of min(OuterReference(b)). TODO: Currently we don't allow deep correlation. Also, we don't allow mixing of outer references and local references under an aggregate expression. For example (SQL):

    SELECT .. FROM p1
WHERE EXISTS (SELECT ...
              FROM p2
              WHERE EXISTS (SELECT ...
                            FROM sq
                            WHERE min(p1.a + p2.b) = sq.c))

SELECT .. FROM p1
WHERE EXISTS (SELECT ...
              FROM p2
              WHERE EXISTS (SELECT ...
                            FROM sq
                            WHERE min(p1.a) + max(p2.b) = sq.c))

SELECT .. FROM p1
WHERE EXISTS (SELECT ...
              FROM p2
              WHERE EXISTS (SELECT ...
                            FROM sq
                            WHERE min(p1.a + sq.c) > 1))

    The code below needs to change when we support the above cases.

  22. def hasOuterReferences(plan: LogicalPlan): Boolean

    Given a logical plan, returns TRUE if it has an outer reference and false otherwise.

  23. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  24. def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  25. def initializeLogIfNecessary(isInterpreter: Boolean): Unit
    Attributes
    protected
    Definition Classes
    Logging
  26. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  27. def isLikelySelective(e: Expression): Boolean

    Returns whether an expression is likely to be selective

    Returns whether an expression is likely to be selective

    Definition Classes
    PredicateHelper
  28. def isNullIntolerant(expr: Expression): Boolean
    Attributes
    protected
    Definition Classes
    PredicateHelper
  29. def isTraceEnabled(): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  30. def log: Logger
    Attributes
    protected
    Definition Classes
    Logging
  31. def logDebug(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  32. def logDebug(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  33. def logError(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  34. def logError(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  35. def logInfo(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  36. def logInfo(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  37. def logName: String
    Attributes
    protected
    Definition Classes
    Logging
  38. def logTrace(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  39. def logTrace(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  40. def logWarning(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  41. def logWarning(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  42. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  43. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  44. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  45. def outputWithNullability(output: Seq[Attribute], nonNullAttrExprIds: Seq[ExprId]): Seq[Attribute]
    Attributes
    protected
    Definition Classes
    PredicateHelper
  46. def replaceAlias(expr: Expression, aliasMap: AttributeMap[Alias]): Expression

    Replace all attributes, that reference an alias, with the aliased expression

    Replace all attributes, that reference an alias, with the aliased expression

    Attributes
    protected
    Definition Classes
    AliasHelper
  47. def replaceAliasButKeepName(expr: NamedExpression, aliasMap: AttributeMap[Alias]): NamedExpression

    Replace all attributes, that reference an alias, with the aliased expression, but keep the name of the outermost attribute.

    Replace all attributes, that reference an alias, with the aliased expression, but keep the name of the outermost attribute.

    Attributes
    protected
    Definition Classes
    AliasHelper
  48. def splitConjunctivePredicates(condition: Expression): Seq[Expression]
    Attributes
    protected
    Definition Classes
    PredicateHelper
  49. def splitDisjunctivePredicates(condition: Expression): Seq[Expression]
    Attributes
    protected
    Definition Classes
    PredicateHelper
  50. def stripOuterReference[E <: Expression](e: E): E

    Returns an expression after removing the OuterReference shell.

  51. def stripOuterReferences(p: LogicalPlan): LogicalPlan

    Returns the logical plan after removing the OuterReference shell from all the expressions of the input logical plan.

  52. def stripOuterReferences[E <: Expression](e: Seq[E]): Seq[E]

    Returns the list of expressions after removing the OuterReference shell from each of the expression.

  53. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  54. def toString(): String
    Definition Classes
    AnyRef → Any
  55. def trimAliases(e: Expression): Expression
    Attributes
    protected
    Definition Classes
    AliasHelper
  56. def trimNonTopLevelAliases[T <: Expression](e: T): T
    Attributes
    protected
    Definition Classes
    AliasHelper
  57. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  58. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  59. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  60. def wrapOuterReference[E <: Expression](e: E): E

    Wrap attributes in the expression with OuterReferences.

Inherited from PredicateHelper

Inherited from Logging

Inherited from AliasHelper

Inherited from AnyRef

Inherited from Any

Ungrouped