chucheng92 opened a new pull request, #3298:
URL: https://github.com/apache/calcite/pull/3298

   # What is the purpose of the change
   
   Returns the string or binary data bit numbers.
   
   > SELECT bit_length('Apache Calcite');
   72
   > SELECT bit_length(x'537061726b2053514c');
   72
    
   details pls see: 
https://spark.apache.org/docs/latest/api/sql/index.html#bit_length
   
   # Brief change log
   Add bit_length (enabled in Spark library)
   
   # Verifying this change
   SqlOperatorTests#testBitLength
   


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