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-rw-r--r--lib/sqlalchemy/sql/sqltypes.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/sqltypes.py b/lib/sqlalchemy/sql/sqltypes.py
index 6838baa5f..fe9a56b6e 100644
--- a/lib/sqlalchemy/sql/sqltypes.py
+++ b/lib/sqlalchemy/sql/sqltypes.py
@@ -205,6 +205,10 @@ class String(Concatenable, TypeEngine):
def literal_processor(self, dialect):
def process(value):
value = value.replace("'", "''")
+
+ if dialect.identifier_preparer._double_percents:
+ value = value.replace('%', '%%')
+
return "'%s'" % value
return process