Tanner Clary created CALCITE-5452:
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             Summary: Add BigQuery LENGTH() as synonym for CHAR_LENGTH()
                 Key: CALCITE-5452
                 URL: https://issues.apache.org/jira/browse/CALCITE-5452
             Project: Calcite
          Issue Type: Improvement
            Reporter: Tanner Clary


Add {{LENGTH()}} as a synonym under the BigQuery library. Calcite currently 
supports {{CHAR_LENGTH()}} and {{CHARACTER_LENGTH()}} as standard functions 
which return the length of a provided string of characters. BigQuery offers the 
{{LENGTH()}} function which serves the same purpose. 

Example: SELECT LENGTH("hello"); would return 5.

[BigQuery Docs | 
https://cloud.google.com/bigquery/docs/reference/standard-sql/string_functions#length
 ]



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