1 files changed, 20 insertions, 0 deletions
diff --git a/sqlglot/dataframe/sql/_typing.pyi b/sqlglot/dataframe/sql/_typing.pyi
new file mode 100644
index 0000000..f1a03ea
--- /dev/null
+++ b/sqlglot/dataframe/sql/_typing.pyi
@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+import datetime
+import typing as t
+
+from sqlglot import expressions as exp
+
+if t.TYPE_CHECKING:
+    from sqlglot.dataframe.sql.column import Column
+    from sqlglot.dataframe.sql.types import StructType
+
+ColumnLiterals = t.TypeVar(
+    "ColumnLiterals", bound=t.Union[str, float, int, bool, t.List, t.Tuple, datetime.date, datetime.datetime]
+)
+ColumnOrName = t.TypeVar("ColumnOrName", bound=t.Union[Column, str])
+ColumnOrLiteral = t.TypeVar(
+    "ColumnOrLiteral", bound=t.Union[Column, str, float, int, bool, t.List, t.Tuple, datetime.date, datetime.datetime]
+)
+SchemaInput = t.TypeVar("SchemaInput", bound=t.Union[str, t.List[str], StructType, t.Dict[str, str]])
+OutputExpressionContainer = t.TypeVar("OutputExpressionContainer", bound=t.Union[exp.Select, exp.Create, exp.Insert])