typing: add stubs for connectorx.so

connectorx-python/connectorx/connectorx.pyi

@@ -0,0 +1,34 @@
+from __future__ import annotations
+
+from typing import overload, Literal, Any, TypeAlias
+import pandas as pd
+
+_ArrowArrayPtr: TypeAlias = int
+_ArrowSchemaPtr: TypeAlias = int
+_Column: TypeAlias = str
+
+@overload
+def read_sql(
+    conn: str,
+    return_type: Literal["pandas"],
+    protocol: str | None,
+    queries: list[str] | None,
+    partition_query: dict[str, Any] | None,
+) -> pd.DataFrame: ...
+@overload
+def read_sql(
+    conn: str,
+    return_type: Literal["arrow", "arrow2"],
+    protocol: str | None,
+    queries: list[str] | None,
+    partition_query: dict[str, Any] | None,
+) -> tuple[list[_Column], list[list[tuple[_ArrowArrayPtr, _ArrowSchemaPtr]]]]: ...
+def partition_sql(conn: str, partition_query: dict[str, Any]) -> list[str]: ...
+def read_sql2(
+    sql: str, db_map: dict[str, str]
+) -> tuple[list[_Column], list[list[tuple[_ArrowArrayPtr, _ArrowSchemaPtr]]]]: ...
+def get_meta(
+    conn: str,
+    protocol: Literal["csv", "binary", "cursor", "simple", "text"] | None,
+    query: str,
+) -> dict[str, Any]: ...