org.apache.spark.sql.execution.command

ShowColumnsCommand

case class ShowColumnsCommand(databaseName: Option[String], tableName: TableIdentifier) extends LeafNode with RunnableCommand with Product with Serializable

A command to list the column names for a table. This function creates a ShowColumnsCommand logical plan.

The syntax of using this command in SQL is:

SHOW COLUMNS (FROM | IN) table_identifier [(FROM | IN) database];
Linear Supertypes
Serializable, Serializable, RunnableCommand, Command, LeafNode, LogicalPlan, Logging, QueryPlan[LogicalPlan], TreeNode[LogicalPlan], Product, Equals, AnyRef, Any
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Inherited
  1. ShowColumnsCommand
  2. Serializable
  3. Serializable
  4. RunnableCommand
  5. Command
  6. LeafNode
  7. LogicalPlan
  8. Logging
  9. QueryPlan
  10. TreeNode
  11. Product
  12. Equals
  13. AnyRef
  14. Any
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Instance Constructors

  1. new ShowColumnsCommand(databaseName: Option[String], tableName: TableIdentifier)

Value Members

  1. final def !=(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  2. final def !=(arg0: Any): Boolean

    Definition Classes
    Any

  3. final def ##(): Int

    Definition Classes
    AnyRef → Any

  4. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  5. final def ==(arg0: Any): Boolean

    Definition Classes
    Any

  6. lazy val allAttributes: AttributeSeq

    Definition Classes
    QueryPlan

  7. def analyzed: Boolean

    Definition Classes
    LogicalPlan

  8. def apply(number: Int): TreeNode[_]

    Definition Classes
    TreeNode

  9. def argString: String

    Definition Classes
    TreeNode

  10. def asCode: String

    Definition Classes
    TreeNode

  11. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  12. lazy val canonicalized: LogicalPlan

    Definition Classes
    QueryPlan

  13. final def children: Seq[LogicalPlan]

    Definition Classes
    LeafNode → TreeNode

  14. def childrenResolved: Boolean

    Definition Classes
    LogicalPlan

  15. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  16. def collect[B](pf: PartialFunction[LogicalPlan, B]): Seq[B]

    Definition Classes
    TreeNode

  17. def collectFirst[B](pf: PartialFunction[LogicalPlan, B]): Option[B]

    Definition Classes
    TreeNode

  18. def collectLeaves(): Seq[LogicalPlan]

    Definition Classes
    TreeNode

  19. def computeStats(conf: SQLConf): Statistics

    Attributes
    protected
    Definition Classes
    LogicalPlan

  20. lazy val constraints: ExpressionSet

    Definition Classes
    QueryPlan

  21. lazy val containsChild: Set[TreeNode[_]]

    Definition Classes
    TreeNode

  22. val databaseName: Option[String]

  23. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  24. final def expressions: Seq[Expression]

    Definition Classes
    QueryPlan

  25. def fastEquals(other: TreeNode[_]): Boolean

    Definition Classes
    TreeNode

  26. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  27. def find(f: (LogicalPlan) ⇒ Boolean): Option[LogicalPlan]

    Definition Classes
    TreeNode

  28. def flatMap[A](f: (LogicalPlan) ⇒ TraversableOnce[A]): Seq[A]

    Definition Classes
    TreeNode

  29. def foreach(f: (LogicalPlan) ⇒ Unit): Unit

    Definition Classes
    TreeNode

  30. def foreachUp(f: (LogicalPlan) ⇒ Unit): Unit

    Definition Classes
    TreeNode

  31. def generateTreeString(depth: Int, lastChildren: Seq[Boolean], builder: StringBuilder, verbose: Boolean, prefix: String, addSuffix: Boolean): StringBuilder

    Definition Classes
    TreeNode

  32. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any

  33. def getRelevantConstraints(constraints: Set[Expression]): Set[Expression]

    Attributes
    protected
    Definition Classes
    QueryPlan

  34. def hashCode(): Int

    Definition Classes
    TreeNode → AnyRef → Any

  35. def initializeLogIfNecessary(isInterpreter: Boolean): Unit

    Attributes
    protected
    Definition Classes
    Logging

  36. def innerChildren: Seq[QueryPlan[_]]

    Attributes
    protected
    Definition Classes
    QueryPlan → TreeNode

  37. def inputSet: AttributeSet

    Definition Classes
    QueryPlan

  38. final def invalidateStatsCache(): Unit

    Definition Classes
    LogicalPlan

  39. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any

  40. def isStreaming: Boolean

    Definition Classes
    LogicalPlan

  41. def isTraceEnabled(): Boolean

    Attributes
    protected
    Definition Classes
    Logging

  42. def jsonFields: List[(String, JValue)]

    Attributes
    protected
    Definition Classes
    TreeNode

  43. def log: Logger

    Attributes
    protected
    Definition Classes
    Logging

  44. def logDebug(msg: ⇒ String, throwable: Throwable): Unit

    Attributes
    protected
    Definition Classes
    Logging

  45. def logDebug(msg: ⇒ String): Unit

    Attributes
    protected
    Definition Classes
    Logging

  46. def logError(msg: ⇒ String, throwable: Throwable): Unit

    Attributes
    protected
    Definition Classes
    Logging

  47. def logError(msg: ⇒ String): Unit

    Attributes
    protected
    Definition Classes
    Logging

  48. def logInfo(msg: ⇒ String, throwable: Throwable): Unit

    Attributes
    protected
    Definition Classes
    Logging

  49. def logInfo(msg: ⇒ String): Unit

    Attributes
    protected
    Definition Classes
    Logging

  50. def logName: String

    Attributes
    protected
    Definition Classes
    Logging

  51. def logTrace(msg: ⇒ String, throwable: Throwable): Unit

    Attributes
    protected
    Definition Classes
    Logging

  52. def logTrace(msg: ⇒ String): Unit

    Attributes
    protected
    Definition Classes
    Logging

  53. def logWarning(msg: ⇒ String, throwable: Throwable): Unit

    Attributes
    protected
    Definition Classes
    Logging

  54. def logWarning(msg: ⇒ String): Unit

    Attributes
    protected
    Definition Classes
    Logging

  55. def makeCopy(newArgs: Array[AnyRef]): LogicalPlan

    Definition Classes
    TreeNode

  56. def map[A](f: (LogicalPlan) ⇒ A): Seq[A]

    Definition Classes
    TreeNode

  57. def mapChildren(f: (LogicalPlan) ⇒ LogicalPlan): LogicalPlan

    Definition Classes
    TreeNode

  58. def mapExpressions(f: (Expression) ⇒ Expression): ShowColumnsCommand.this.type

    Definition Classes
    QueryPlan

  59. def mapProductIterator[B](f: (Any) ⇒ B)(implicit arg0: ClassTag[B]): Array[B]

    Attributes
    protected
    Definition Classes
    TreeNode

  60. def maxRows: Option[Long]

    Definition Classes
    LogicalPlan

  61. def missingInput: AttributeSet

    Definition Classes
    QueryPlan

  62. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  63. def nodeName: String

    Definition Classes
    TreeNode

  64. final def notify(): Unit

    Definition Classes
    AnyRef

  65. final def notifyAll(): Unit

    Definition Classes
    AnyRef

  66. def numberedTreeString: String

    Definition Classes
    TreeNode

  67. val origin: Origin

    Definition Classes
    TreeNode

  68. def otherCopyArgs: Seq[AnyRef]

    Attributes
    protected
    Definition Classes
    TreeNode

  69. val output: Seq[Attribute]

    Definition Classes
    ShowColumnsCommand → Command → QueryPlan

  70. def outputSet: AttributeSet

    Definition Classes
    QueryPlan

  71. def p(number: Int): LogicalPlan

    Definition Classes
    TreeNode

  72. def preCanonicalized: LogicalPlan

    Attributes
    protected
    Definition Classes
    QueryPlan

  73. def prettyJson: String

    Definition Classes
    TreeNode

  74. def printSchema(): Unit

    Definition Classes
    QueryPlan

  75. def producedAttributes: AttributeSet

    Definition Classes
    LeafNode → QueryPlan

  76. def references: AttributeSet

    Definition Classes
    QueryPlan

  77. def refresh(): Unit

    Definition Classes
    LogicalPlan

  78. def resolve(nameParts: Seq[String], input: Seq[Attribute], resolver: (String, String) ⇒ Boolean): Option[NamedExpression]

    Attributes
    protected
    Definition Classes
    LogicalPlan

  79. def resolve(nameParts: Seq[String], resolver: (String, String) ⇒ Boolean): Option[NamedExpression]

    Definition Classes
    LogicalPlan

  80. def resolve(schema: StructType, resolver: (String, String) ⇒ Boolean): Seq[Attribute]

    Definition Classes
    LogicalPlan

  81. def resolveChildren(nameParts: Seq[String], resolver: (String, String) ⇒ Boolean): Option[NamedExpression]

    Definition Classes
    LogicalPlan

  82. def resolveExpressions(r: PartialFunction[Expression, Expression]): LogicalPlan

    Definition Classes
    LogicalPlan

  83. def resolveOperators(rule: PartialFunction[LogicalPlan, LogicalPlan]): LogicalPlan

    Definition Classes
    LogicalPlan

  84. def resolveQuoted(name: String, resolver: (String, String) ⇒ Boolean): Option[NamedExpression]

    Definition Classes
    LogicalPlan

  85. lazy val resolved: Boolean

    Definition Classes
    LogicalPlan

  86. def run(sparkSession: SparkSession): Seq[Row]

    Definition Classes
    ShowColumnsCommand → RunnableCommand

  87. final def sameResult(other: LogicalPlan): Boolean

    Definition Classes
    QueryPlan

  88. lazy val schema: StructType

    Definition Classes
    QueryPlan

  89. def schemaString: String

    Definition Classes
    QueryPlan

  90. final def semanticHash(): Int

    Definition Classes
    QueryPlan

  91. def simpleString: String

    Definition Classes
    QueryPlan → TreeNode

  92. def statePrefix: String

    Attributes
    protected
    Definition Classes
    LogicalPlan → QueryPlan

  93. final def stats(conf: SQLConf): Statistics

    Definition Classes
    LogicalPlan

  94. def stringArgs: Iterator[Any]

    Attributes
    protected
    Definition Classes
    TreeNode

  95. def subqueries: Seq[LogicalPlan]

    Definition Classes
    QueryPlan

  96. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef

  97. val tableName: TableIdentifier

  98. def toJSON: String

    Definition Classes
    TreeNode

  99. def toString(): String

    Definition Classes
    TreeNode → AnyRef → Any

  100. def transform(rule: PartialFunction[LogicalPlan, LogicalPlan]): LogicalPlan

    Definition Classes
    TreeNode

  101. def transformAllExpressions(rule: PartialFunction[Expression, Expression]): ShowColumnsCommand.this.type

    Definition Classes
    QueryPlan

  102. def transformDown(rule: PartialFunction[LogicalPlan, LogicalPlan]): LogicalPlan

    Definition Classes
    TreeNode

  103. def transformExpressions(rule: PartialFunction[Expression, Expression]): ShowColumnsCommand.this.type

    Definition Classes
    QueryPlan

  104. def transformExpressionsDown(rule: PartialFunction[Expression, Expression]): ShowColumnsCommand.this.type

    Definition Classes
    QueryPlan

  105. def transformExpressionsUp(rule: PartialFunction[Expression, Expression]): ShowColumnsCommand.this.type

    Definition Classes
    QueryPlan

  106. def transformUp(rule: PartialFunction[LogicalPlan, LogicalPlan]): LogicalPlan

    Definition Classes
    TreeNode

  107. def treeString(verbose: Boolean, addSuffix: Boolean): String

    Definition Classes
    TreeNode

  108. def treeString: String

    Definition Classes
    TreeNode

  109. def validConstraints: Set[Expression]

    Attributes
    protected
    Definition Classes
    QueryPlan

  110. def verboseString: String

    Definition Classes
    QueryPlan → TreeNode

  111. def verboseStringWithSuffix: String

    Definition Classes
    LogicalPlan → TreeNode

  112. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  113. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  114. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  115. def withNewChildren(newChildren: Seq[LogicalPlan]): LogicalPlan

    Definition Classes
    TreeNode

Inherited from Serializable

Inherited from Serializable

Inherited from RunnableCommand

Inherited from Command

Inherited from LeafNode

Inherited from LogicalPlan

Inherited from Logging

Inherited from QueryPlan[LogicalPlan]

Inherited from TreeNode[LogicalPlan]

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

Ungrouped