Edit distance

Supported in: Batch, Streaming

Compute the edit distance between two strings. Supports Levenshtein, indel, and Damerau-Levenshtein distance.

Expression categories: Distance measurement, String

Declared arguments

• Distance function: Distance function used to calculate the edit distance between the two strings.
  Enum<Damerau-Levenshtein Distance, Indel Distance, Levenshtein Distance>
• Ignore case: Do you want to ignore case when comparing the left and right strings?
  Literal<Boolean>
• Left: Left string to compare.
  Expression<String>
• Right: Right string to compare.
  Expression<String>
• optional Normalize distance: Do you want to normalize the distance to a value between 0 and 1, where 0 means no difference between strings and 1 means no similarity?
  Literal<Boolean>

Output type: Double | Integer

Examples

Example 1: Base case

Description: String edit distance calculated using Levenshtein distance

Argument values:

• Distance function: levenshtein
• Ignore case: false
• Left: left
• Right: right
• Normalize distance: false

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Example 2: Base case

Description: By setting ignore case to true, letters of different case are treated as equal. Here calculated using Damerau-Levenshtein distance.

Argument values:

• Distance function: damerau_levenshtein
• Ignore case: true
• Left: left
• Right: right
• Normalize distance: false

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Example 3: Base case

Description: By setting normalize to true, the edit distance is normalized to a value between 0 and 1. Here calculated using indel distance.

Argument values:

• Distance function: indel
• Ignore case: false
• Left: left
• Right: right
• Normalize distance: true

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Example 4: Null case

Argument values:

• Distance function: levenshtein
• Ignore case: false
• Left: left
• Right: right
• Normalize distance: false

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