UTF8_MODE Query Option
UTF-8 support allows string functions to recognize the UTF-8 characters, thus processing strings in a compatible way as other engines.
You can use the new query option, UTF8_MODE, to turn on/off the UTF-8 aware behavior. The query option can be set globally, or at per session level. Only queries with UTF8_MODE=true will have UTF-8 aware behaviors. If the query option UTF8_MODE is turned on globally, existing queries that depend on the original binary behavior need to be explicitly set to UTF8_MODE=false.
Added in:Impala 4.1