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Filter Row If Matched

The FILTER-ROW-IF-MATCHED directive filters records that match a pattern for a column.

Syntax

filter-row-if-matched <column> <regex>

The <regex> is a valid regular expression that is evaluated on the column value for every record.

Usage Notes

The FILTER-ROW-IF-MATCHED directive applies the regular expression on a column value for every record. If the regex matches the column value, the record is omitted, otherwise it is passed as-is to the input of the next directive.

If the regex is null, the value is compared against all the null as well as JSON null values.

Examples

Using this record as an example:

{
  "id": 1,
  "name": "Joltie, Root",
  "emailid": "[email protected]",
  "hrlywage": "12.34",
  "gender": "Male",
  "country": "US"
}

Applying this directive:

filter-row-if-matched country !~ US

would result in filtering out records for individuals that are not in the US (where country does not match "US").

Applying this directive:

filter-row-if-matched (country !~ US && hrlywage > 12)

would result in filtering out records for individuals that are not in the US (where country does not match "US") and whose hourly wage (hrlywage) is greater than 12.