Josh Rosen created SPARK-28007:
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Summary: Caret operator (^) means bitwise XOR in Spark and
exponentiation in Postgres/Redshift
Key: SPARK-28007
URL: https://issues.apache.org/jira/browse/SPARK-28007
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 3.0.0
Reporter: Josh Rosen
The expression {{expr1 ^ expr2}} has different meanings in Spark and Postgres:
* [In Postgres|https://www.postgresql.org/docs/11/functions-math.html] and
[Redshift|https://docs.aws.amazon.com/redshift/latest/dg/r_OPERATOR_SYMBOLS.html]
, this returns {{expr1}} raised to the exponent {{expr2}} (additionally, the
Postgres docs explicitly state that this operation is left-associative).
* [In Spark|https://spark.apache.org/docs/2.4.3/api/sql/index.html#_14] and
[Hive|https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-ArithmeticOperators],
this returns the bitwise exclusive OR of {{expr1}} and {{expr2}}.
I'm reporting this under the Postgres compatibility umbrella. If we have SQL
dialect support (e.g. a Postgres compatibility dialect), maybe this behavior
could be flagged there?
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