ibis_cloud_spanner folder added

third_party/ibis/ibis_cloud_spanner/__init__.py

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+
+

third_party/ibis/ibis_cloud_spanner/api.py

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+# Copyright 2021 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+"""CloudScanner public API."""
+
+
+from third_party.ibis.ibis_cloud_spanner.client import CloudSpannerClient
+from third_party.ibis.ibis_cloud_spanner.compiler import dialect
+
+import google.cloud.spanner  # noqa: F401, fail early if spanner is missing
+import ibis.common.exceptions as com
+
+__all__ = ("compile", "connect", "verify")
+
+
+def compile(expr, params=None):
+    """Compile an expression for Cloud Spanner.
+
+    Returns
+    -------
+    compiled : str
+
+    See Also
+    --------
+    ibis.expr.types.Expr.compile
+
+    """
+    from third_party.ibis.ibis_cloud_spanner.compiler import to_sql
+
+    return to_sql(expr, dialect.make_context(params=params))
+
+
+def verify(expr, params=None):
+    """Check if an expression can be compiled using Cloud Spanner."""
+    try:
+        compile(expr, params=params)
+        return True
+    except com.TranslationError:
+        return False
+
+
+def connect(
+    instance_id,
+    database_id,
+) -> CloudSpannerClient:
+    """Create a CloudSpannerClient for use with Ibis.
+
+    Parameters
+    ----------
+    instance_id : str
+        A Cloud Spanner Instance id.
+    database_id : str
+        A database id inside of the Cloud Spanner Instance
+
+    Returns
+    -------
+    CloudSpannerClient
+
+    """
+
+    return CloudSpannerClient(instance_id=instance_id, database_id=database_id)