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georgesittas avatar georgesittas commented on July 22, 2024

Thanks for the report, this does look like a bug.

so the workaround for us was to make sure that we added the dialect parameter to parse_one()

I'd suggest this anyway because it's more stable vs using the base dialect.

@tobymao it's because Unnest now inherits from Func, so when it's used in places other than FROM, JOIN etc we now parse it in _parse_function_call as exp.Unnest, vs exp.Anonymous which was the behavior before 6a607d3.

>>> import sqlglot
>>> sqlglot.parse_one("SELECT unnest(ARRAY[1, 2, 3])")
Select(
  expressions=[
    Unnest(
      expressions=Array(
        expressions=[
          Literal(this=1, is_string=False),
          Literal(this=2, is_string=False),
          Literal(this=3, is_string=False)]))])
>>> sqlglot.parse_one("SELECT unnest(ARRAY[1, 2, 3])", "postgres")
Select(
  expressions=[
    Explode(
      this=Array(
        expressions=[
          Literal(this=1, is_string=False),
          Literal(this=2, is_string=False),
          Literal(this=3, is_string=False)]))])

Parsing / generating with Postgres works because it produces an Explode node, not an Unnest.

from sqlglot.

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