Support SQLite URIs

Added support for sqlite "URI" connections, which allow for sqlite-specific
flags to be passed in the query string such as "read only" for Python
sqlite3 drivers that support this.

Fixes: #4863
Change-Id: I7740b55ee8f2ede72a5c49ee94a7540e4d0250f2

1 files changed, 6 insertions, 3 deletions

diff --git a/lib/sqlalchemy/util/langhelpers.py b/lib/sqlalchemy/util/langhelpers.py
index f3f3f9ea5..83f119660 100644
--- a/lib/sqlalchemy/util/langhelpers.py
+++ b/lib/sqlalchemy/util/langhelpers.py
@@ -1126,21 +1126,24 @@ def asint(value):
     return int(value)
 
 
-def coerce_kw_type(kw, key, type_, flexi_bool=True):
+def coerce_kw_type(kw, key, type_, flexi_bool=True, dest=None):
     r"""If 'key' is present in dict 'kw', coerce its value to type 'type\_' if
     necessary.  If 'flexi_bool' is True, the string '0' is considered false
     when coercing to boolean.
     """
 
+    if dest is None:
+        dest = kw
+
     if (
         key in kw
         and (not isinstance(type_, type) or not isinstance(kw[key], type_))
         and kw[key] is not None
     ):
         if type_ is bool and flexi_bool:
-            kw[key] = asbool(kw[key])
+            dest[key] = asbool(kw[key])
         else:
-            kw[key] = type_(kw[key])
+            dest[key] = type_(kw[key])
 
 
 def constructor_key(obj, cls):