Packages

  • package root
    Definition Classes
    root
  • package org
    Definition Classes
    root
  • package apache
    Definition Classes
    org
  • package spark
    Definition Classes
    apache
  • package sql
    Definition Classes
    spark
  • package catalyst

    Catalyst is a library for manipulating relational query plans.

    Catalyst is a library for manipulating relational query plans. All classes in catalyst are considered an internal API to Spark SQL and are subject to change between minor releases.

    Definition Classes
    sql
  • package analysis

    Provides a logical query plan Analyzer and supporting classes for performing analysis.

    Provides a logical query plan Analyzer and supporting classes for performing analysis. Analysis consists of translating UnresolvedAttributes and UnresolvedRelations into fully typed objects using information in a schema Catalog.

    Definition Classes
    catalyst
  • object AnsiTypeCoercion extends TypeCoercionBase

    In Spark ANSI mode, the type coercion rules are based on the type precedence lists of the input data types.

    In Spark ANSI mode, the type coercion rules are based on the type precedence lists of the input data types. As per the section "Type precedence list determination" of "ISO/IEC 9075-2:2011 Information technology - Database languages - SQL - Part 2: Foundation (SQL/Foundation)", the type precedence lists of primitive data types are as following: * Byte: Byte, Short, Int, Long, Decimal, Float, Double * Short: Short, Int, Long, Decimal, Float, Double * Int: Int, Long, Decimal, Float, Double * Long: Long, Decimal, Float, Double * Decimal: Float, Double, or any wider Numeric type * Float: Float, Double * Double: Double * String: String * Date: Date, Timestamp * Timestamp: Timestamp * Binary: Binary * Boolean: Boolean * Interval: Interval As for complex data types, Spark will determine the precedent list recursively based on their sub-types and nullability.

    With the definition of type precedent list, the general type coercion rules are as following: * Data type S is allowed to be implicitly cast as type T iff T is in the precedence list of S * Comparison is allowed iff the data type precedence list of both sides has at least one common element. When evaluating the comparison, Spark casts both sides as the tightest common data type of their precedent lists. * There should be at least one common data type among all the children's precedence lists for the following operators. The data type of the operator is the tightest common precedent data type. * In * Except * Intersect * Greatest * Least * Union * If * CaseWhen * CreateArray * Array Concat * Sequence * MapConcat * CreateMap * For complex types (struct, array, map), Spark recursively looks into the element type and applies the rules above. Note: this new type coercion system will allow implicit converting String type as other primitive types, in case of breaking too many existing Spark SQL queries. This is a special rule and it is not from the ANSI SQL standard.

    Definition Classes
    analysis
  • AnsiCombinedTypeCoercionRule
  • CaseWhenCoercion
  • CombinedTypeCoercionRule
  • ConcatCoercion
  • DateTimeOperations
  • Division
  • EltCoercion
  • FunctionArgumentConversion
  • GetDateFieldOperations
  • IfCoercion
  • ImplicitTypeCasts
  • InConversion
  • IntegralDivision
  • MapZipWithCoercion
  • PromoteStrings
  • StackCoercion
  • StringLiteralCoercion
  • UnpivotCoercion
  • WidenSetOperationTypes
  • WindowFrameCoercion

object GetDateFieldOperations extends Rule[LogicalPlan] with TypeCoercionRule

When getting a date field from a Timestamp column, cast the column as date type.

This is Spark's hack to make the implementation simple. In the default type coercion rules, the implicit cast rule does the work. However, The ANSI implicit cast rule doesn't allow converting Timestamp type as Date type, so we need to have this additional rule to make sure the date field extraction from Timestamp columns works.

Linear Supertypes
TypeCoercionRule, Rule[LogicalPlan], Logging, SQLConfHelper, AnyRef, Any
Ordering
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  2. By Inheritance
Inherited
  1. GetDateFieldOperations
  2. TypeCoercionRule
  3. Rule
  4. Logging
  5. SQLConfHelper
  6. AnyRef
  7. Any
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Visibility
  1. Public
  2. Protected

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. def apply(plan: LogicalPlan): LogicalPlan

    Applies any changes to AttributeReference data types that are made by the transform method to instances higher in the query tree.

    Applies any changes to AttributeReference data types that are made by the transform method to instances higher in the query tree.

    Definition Classes
    TypeCoercionRule → Rule
  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  7. 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.

    Definition Classes
    SQLConfHelper
  8. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  9. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  10. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  11. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  12. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  14. def initializeLogIfNecessary(isInterpreter: Boolean): Unit
    Attributes
    protected
    Definition Classes
    Logging
  15. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  16. def isTraceEnabled(): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  17. def log: Logger
    Attributes
    protected
    Definition Classes
    Logging
  18. def logDebug(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  19. def logDebug(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  20. def logError(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  21. def logError(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  22. def logInfo(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  23. def logInfo(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  24. def logName: String
    Attributes
    protected
    Definition Classes
    Logging
  25. def logTrace(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  26. def logTrace(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  27. def logWarning(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  28. def logWarning(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  29. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  30. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  31. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  32. lazy val ruleId: RuleId
    Attributes
    protected
    Definition Classes
    Rule
  33. val ruleName: String

    Name for this rule, automatically inferred based on class name.

    Name for this rule, automatically inferred based on class name.

    Definition Classes
    Rule
  34. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  35. def toString(): String
    Definition Classes
    AnyRef → Any
  36. def transform: PartialFunction[Expression, Expression]
    Definition Classes
    GetDateFieldOperations → TypeCoercionRule
  37. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  38. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  39. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Inherited from TypeCoercionRule

Inherited from Rule[LogicalPlan]

Inherited from Logging

Inherited from SQLConfHelper

Inherited from AnyRef

Inherited from Any

Ungrouped