Added mapd backend initial files.

ibis/__init__.py

@@ -71,6 +71,10 @@
     # pip install ibis-framework[bigquery]
     import ibis.bigquery.api as bigquery
 
+with suppress(ImportError):
+    # pip install ibis-framework[bigquery]
+    import ibis.mapd.api as mapd
+
 restart_ordering()
 
 

ibis/mapd/api.py

@@ -0,0 +1,47 @@
+# api.py
+import pymapd
+import ibis.common as com
+from ibis.config import options
+from ibis.mapd.client import MapDClient
+from ibis.mapd.compiler import dialect
+
+
+def compile(expr, params=None):
+    """
+    Force compilation of expression as though it were an expression depending
+    on MapD. Note you can also call expr.compile()
+
+    Returns
+    -------
+    compiled : string
+    """
+    from ibis.mapd.compiler import to_sql
+    return to_sql(expr, dialect.make_context(params=params))
+
+
+def verify(expr, params=None):
+    """
+    Determine if expression can be successfully translated to execute on
+    MapD
+    """
+    try:
+        compile(expr, params=params)
+        return True
+    except com.TranslationError:
+        return False
+
+
+def connect(project_id, dataset_id):
+    """Create a MapDClient for use with Ibis
+
+    Parameters
+    ----------
+    project_id: str
+    dataset_id: str
+
+    Returns
+    -------
+    MapDClient
+    """
+
+    return MapDClient(project_id, dataset_id)