Packages

class ToNumberParser extends Serializable

This class represents a parser to implement the to_number or try_to_number SQL functions.

It works by consuming an input string and a format string. This class accepts the format string as a field, and proceeds to iterate through the format string to generate a sequence of tokens (or throw an exception if the format string is invalid). Then when the function is called with an input string, this class steps through the sequence of tokens and compares them against the input string, returning a Spark Decimal object if they match (or throwing an exception otherwise).

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Instance Constructors

  1. new ToNumberParser(numberFormat: String, errorOnFail: Boolean)

    numberFormat

    the format string describing the expected inputs.

    errorOnFail

    true if evaluation should throw an exception if the input string fails to match the format string. Otherwise, returns NULL instead.

Value Members

  1. final def !=(arg0: Any): Boolean
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  5. def checkInputDataTypes(): TypeCheckResult
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  9. def finalize(): Unit
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  10. def format(input: Decimal): UTF8String

    Converts a decimal value to a string based on the given number format.

    Converts a decimal value to a string based on the given number format.

    Iterates through the formatTokens obtained from processing the format string, while also inspecting the input decimal value.

    input

    the decimal value that needs to be converted

    returns

    the result String value obtained from string formatting

  11. final def getClass(): Class[_ <: AnyRef]
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  12. def hashCode(): Int
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  16. final def notifyAll(): Unit
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    @native()
  17. def parse(input: UTF8String): Decimal

    Convert string to numeric based on the given number format.

    Convert string to numeric based on the given number format.

    Iterates through the formatTokens obtained from processing the format string, while also keeping a parallel index into the input string. Throws an exception if the latter does not contain expected characters at any point.

    input

    the string that needs to converted

    returns

    the result Decimal value obtained from string parsing

  18. def parsedDecimalType: DecimalType

    The result type of this parsing is a Decimal value with the appropriate precision and scale.

  19. final def synchronized[T0](arg0: => T0): T0
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  20. def toString(): String
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  21. final def wait(): Unit
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