WeichenXu123 commented on code in PR #40376:
URL: https://github.com/apache/spark/pull/40376#discussion_r1133366703
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python/pyspark/sql/connect/expressions.py:
##########
@@ -308,6 +308,43 @@ def _infer_type(cls, value: Any) -> DataType:
def _from_value(cls, value: Any) -> "LiteralExpression":
return LiteralExpression(value=value,
dataType=LiteralExpression._infer_type(value))
+ @classmethod
+ def _to_value(cls, literal: "proto.Expression.Literal") -> Any:
+ if literal.HasField("null"):
+ return None
Review Comment:
Shall we raise error in this case ?
##########
python/pyspark/sql/connect/expressions.py:
##########
@@ -308,6 +308,43 @@ def _infer_type(cls, value: Any) -> DataType:
def _from_value(cls, value: Any) -> "LiteralExpression":
return LiteralExpression(value=value,
dataType=LiteralExpression._infer_type(value))
+ @classmethod
+ def _to_value(cls, literal: "proto.Expression.Literal") -> Any:
+ if literal.HasField("null"):
+ return None
+ elif literal.HasField("binary"):
+ return literal.binary
+ elif literal.HasField("boolean"):
+ return literal.boolean
+ elif literal.HasField("byte"):
+ return literal.byte
+ elif literal.HasField("short"):
+ return literal.short
+ elif literal.HasField("integer"):
+ return literal.integer
+ elif literal.HasField("long"):
+ return literal.long
+ elif literal.HasField("float"):
+ return literal.float
+ elif literal.HasField("double"):
+ return literal.double
+ elif literal.HasField("decimal"):
+ return decimal.Decimal(literal.decimal.value)
+ elif literal.HasField("string"):
+ return literal.string
+ elif literal.HasField("date"):
+ return DateType().fromInternal(literal.date)
+ elif literal.HasField("timestamp"):
+ return TimestampType().fromInternal(literal.timestamp)
+ elif literal.HasField("timestamp_ntz"):
+ return TimestampNTZType().fromInternal(literal.timestamp_ntz)
+ elif literal.HasField("day_time_interval"):
+ return
DayTimeIntervalType().fromInternal(literal.day_time_interval)
+ elif literal.HasField("array"):
+ return [LiteralExpression._to_value(v) for v in
literal.array.elements]
Review Comment:
Q: shall we verify the element_type field ?
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