Replace raise_ with raise from

Change-Id: I7aaeb5bc130271624335b79cf586581d6c6c34c7
References: #4600

4 files changed, 23 insertions, 36 deletions

diff --git a/lib/sqlalchemy/dialects/mssql/base.py b/lib/sqlalchemy/dialects/mssql/base.py
index 5b38c4bb5..84f8e72f0 100644
--- a/lib/sqlalchemy/dialects/mssql/base.py
+++ b/lib/sqlalchemy/dialects/mssql/base.py
@@ -3101,22 +3101,16 @@ class MSDialect(default.DefaultDialect):
                 {"p1": self._temp_table_name_like_pattern(tablename)},
             ).one()
         except exc.MultipleResultsFound as me:
-            util.raise_(
-                exc.UnreflectableTableError(
-                    "Found more than one temporary table named '%s' in tempdb "
-                    "at this time. Cannot reliably resolve that name to its "
-                    "internal table name." % tablename
-                ),
-                replace_context=me,
-            )
+            raise exc.UnreflectableTableError(
+                "Found more than one temporary table named '%s' in tempdb "
+                "at this time. Cannot reliably resolve that name to its "
+                "internal table name." % tablename
+            ) from me
         except exc.NoResultFound as ne:
-            util.raise_(
-                exc.NoSuchTableError(
-                    "Unable to find a temporary table named '%s' in tempdb."
-                    % tablename
-                ),
-                replace_context=ne,
-            )
+            raise exc.NoSuchTableError(
+                "Unable to find a temporary table named '%s' in tempdb."
+                % tablename
+            ) from ne
 
     @reflection.cache
     @_db_plus_owner
diff --git a/lib/sqlalchemy/dialects/mysql/base.py b/lib/sqlalchemy/dialects/mysql/base.py
index 50bae40b8..5be057495 100644
--- a/lib/sqlalchemy/dialects/mysql/base.py
+++ b/lib/sqlalchemy/dialects/mysql/base.py
@@ -3159,7 +3159,7 @@ class MySQLDialect(default.DefaultDialect):
             ).exec_driver_sql(st)
         except exc.DBAPIError as e:
             if self._extract_error_code(e.orig) == 1146:
-                util.raise_(exc.NoSuchTableError(full_name), replace_context=e)
+                raise exc.NoSuchTableError(full_name) from e
             else:
                 raise
         row = self._compat_first(rp, charset=charset)
@@ -3183,17 +3183,14 @@ class MySQLDialect(default.DefaultDialect):
             except exc.DBAPIError as e:
                 code = self._extract_error_code(e.orig)
                 if code == 1146:
-                    util.raise_(
-                        exc.NoSuchTableError(full_name), replace_context=e
-                    )
+                    raise exc.NoSuchTableError(full_name) from e
+
                 elif code == 1356:
-                    util.raise_(
-                        exc.UnreflectableTableError(
-                            "Table or view named %s could not be "
-                            "reflected: %s" % (full_name, e)
-                        ),
-                        replace_context=e,
-                    )
+                    raise exc.UnreflectableTableError(
+                        "Table or view named %s could not be "
+                        "reflected: %s" % (full_name, e)
+                    ) from e
+
                 else:
                     raise
             rows = self._compat_fetchall(rp, charset=charset)
diff --git a/lib/sqlalchemy/dialects/sqlite/aiosqlite.py b/lib/sqlalchemy/dialects/sqlite/aiosqlite.py
index 4319e2661..0bc8d5cf1 100644
--- a/lib/sqlalchemy/dialects/sqlite/aiosqlite.py
+++ b/lib/sqlalchemy/dialects/sqlite/aiosqlite.py
@@ -221,10 +221,9 @@ class AsyncAdapt_aiosqlite_connection(AdaptedConnection):
             isinstance(error, ValueError)
             and error.args[0] == "no active connection"
         ):
-            util.raise_(
-                self.dbapi.sqlite.OperationalError("no active connection"),
-                from_=error,
-            )
+            raise self.dbapi.sqlite.OperationalError(
+                "no active connection"
+            ) from error
         else:
             raise error
 
diff --git a/lib/sqlalchemy/dialects/sqlite/base.py b/lib/sqlalchemy/dialects/sqlite/base.py
index d238de1ab..dd43dbc79 100644
--- a/lib/sqlalchemy/dialects/sqlite/base.py
+++ b/lib/sqlalchemy/dialects/sqlite/base.py
@@ -1250,12 +1250,9 @@ class SQLiteCompiler(compiler.SQLCompiler):
                 self.process(extract.expr, **kw),
             )
         except KeyError as err:
-            util.raise_(
-                exc.CompileError(
-                    "%s is not a valid extract argument." % extract.field
-                ),
-                replace_context=err,
-            )
+            raise exc.CompileError(
+                "%s is not a valid extract argument." % extract.field
+            ) from err
 
     def limit_clause(self, select, **kw):
         text = ""