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Comment: Published by Scroll Versions from space DEV and version r0761

D toc

Excerpt

Tests whether a set of values is not valid for a specified data type.

  • For a tested value, this function returns true or false .
  • Inputs can be literal values or column references.

You can define a conditional test in a single step for valid values. See IFMISMATCHED Function.

Info

NOTE: This function is similar to the ISVALID function, which tests for validity against a specified data type. However, unlike the ISVALID function, the ISMISMATCHED function also matches against missing values. See VALID Function.

D s lang vs sql

D s
snippetBasic

Column reference example:

D lang syntax
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Typeref
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WrangleTextdelete row:(ismismatched(Qty, 'Integer') || (Qty < 0))

ismismatched(Qty, 'Integer') || (Qty < 0)

Output: Returns true when the value in the Qty column does not contain a valid Integer and the value is less than zero.

Numeric literal example:

D lang syntax
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Typeref
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WrangleTextderive type:single value: ismismatched('ZZ', 'State')

ismismatched('ZZ', 'State')

Output: Returns true, since the value ZZ is not a valid U.S. State code.

D s
snippetSyntax

D lang syntax
RawWrangletrue
Typesyntax
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WrangleTextderive type:single value:ismismatched(column_string,datatype_literal)

ismismatched(column_string,datatype_literal)


ArgumentRequired?Data TypeDescription
column_stringYstringName of column or string literal to be applied to the function
datatype_literalYstringString literal that identifies the data type against which to validate the source values

D s lang notes

column_string

Name of the column or string literal to be evaluated for mismatches against the specified type.

  • Missing literals or column values generate missing string results.
    • Constants must be quoted ('Hello, World').
  • Multiple columns and wildcards are not supported.

D s
snippetusage

Required?Data TypeExample Value
YesString literal or column referencemyColumn

datatype_literal

Literal value for data type to which to validate the source column or string.

  • Column references are not supported.

D s
snippetusage

Required?Data TypeExample Value
YesString literal'Integer'

Valid data type strings:

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Valid Data Type Strings
Valid Data Type Strings

D s
snippetExamples

Example - Type check functions

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EXAMPLE - Type Functions
EXAMPLE - Type Functions

D s also
labeltype