4 files changed, 25 insertions, 4 deletions
diff --git a/lib/sqlalchemy/dialects/mysql/base.py b/lib/sqlalchemy/dialects/mysql/base.py
index fe0624d08..50bae40b8 100644
--- a/lib/sqlalchemy/dialects/mysql/base.py
+++ b/lib/sqlalchemy/dialects/mysql/base.py
@@ -2327,6 +2327,8 @@ class MySQLDialect(default.DefaultDialect):
     max_index_name_length = 64
     max_constraint_name_length = 64
 
+    div_is_floordiv = False
+
     supports_native_enum = True
 
     supports_sequences = False  # default for MySQL ...
diff --git a/lib/sqlalchemy/dialects/oracle/base.py b/lib/sqlalchemy/dialects/oracle/base.py
index 63131bf95..94feeefce 100644
--- a/lib/sqlalchemy/dialects/oracle/base.py
+++ b/lib/sqlalchemy/dialects/oracle/base.py
@@ -1441,6 +1441,8 @@ class OracleDialect(default.DefaultDialect):
 
     implicit_returning = True
 
+    div_is_floordiv = False
+
     supports_simple_order_by_label = False
     cte_follows_insert = True
 
diff --git a/lib/sqlalchemy/dialects/sqlite/base.py b/lib/sqlalchemy/dialects/sqlite/base.py
index 43883c4b7..d238de1ab 100644
--- a/lib/sqlalchemy/dialects/sqlite/base.py
+++ b/lib/sqlalchemy/dialects/sqlite/base.py
@@ -1215,6 +1215,13 @@ class SQLiteCompiler(compiler.SQLCompiler):
         },
     )
 
+    def visit_truediv_binary(self, binary, operator, **kw):
+        return (
+            self.process(binary.left, **kw)
+            + " / "
+            + "(%s + 0.0)" % self.process(binary.right, **kw)
+        )
+
     def visit_now_func(self, fn, **kw):
         return "CURRENT_TIMESTAMP"
 
diff --git a/lib/sqlalchemy/dialects/sqlite/pysqlite.py b/lib/sqlalchemy/dialects/sqlite/pysqlite.py
index 944d714a3..77c9ebce7 100644
--- a/lib/sqlalchemy/dialects/sqlite/pysqlite.py
+++ b/lib/sqlalchemy/dialects/sqlite/pysqlite.py
@@ -402,6 +402,7 @@ by adding the desired locking mode to our ``"BEGIN"``::
 
 """  # noqa
 
+import math
 import os
 import re
 
@@ -505,14 +506,23 @@ class SQLiteDialect_pysqlite(SQLiteDialect):
                 return None
             return re.search(a, b) is not None
 
+        create_func_kw = {"deterministic": True} if util.py38 else {}
+
         def set_regexp(dbapi_connection):
             dbapi_connection.create_function(
-                "regexp",
-                2,
-                regexp,
+                "regexp", 2, regexp, **create_func_kw
+            )
+
+        def floor_func(dbapi_connection):
+            # NOTE: floor is optionally present in sqlite 3.35+ , however
+            # as it is normally non-present we deliver floor() unconditionally
+            # for now.
+            # https://www.sqlite.org/lang_mathfunc.html
+            dbapi_connection.create_function(
+                "floor", 1, math.floor, **create_func_kw
             )
 
-        fns = [set_regexp]
+        fns = [set_regexp, floor_func]
 
         def connect(conn):
             for fn in fns: