object SupportedGenerationExpressions
This class defines the list of expressions that can be used in a generated column.
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val
expressions: Set[Class[_]]
The white list is copied from
FunctionRegistry.expressions()except the following types of functions: - explode functions.The white list is copied from
FunctionRegistry.expressions()except the following types of functions: - explode functions. In other words, generate multiple rows from one row. - aggerate functions. - window functions. - grouping sets. - non deterministic functions. - deterministic functions in one query but non deterministic in multiple queries, such as, current_timestamp, rand, etc.To review the difference, you can run
diff sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala sql/core/src/main/scala/com/databricks/sql/transaction/SupportedGenerationExpression.scala -
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