Build string/int processors for JSONIndexType, JSONPathType

Fixed regression in JSON datatypes where the "literal processor" for
a JSON index value, that needs to take effect for example within DDL,
would not be invoked for the value.  The native String and Integer
datatypes are now called upon from within the JSONIndexType
and JSONPathType.  This is applied to the generic, Postgresql, and
MySQL JSON types.

Change-Id: Ifa5f2acfeee57a79d01d7fc85d265a37bd27c716
Fixes: #3765

1 files changed, 8 insertions, 4 deletions

diff --git a/lib/sqlalchemy/testing/suite/test_types.py b/lib/sqlalchemy/testing/suite/test_types.py
index d74ef60da..d85531396 100644
--- a/lib/sqlalchemy/testing/suite/test_types.py
+++ b/lib/sqlalchemy/testing/suite/test_types.py
@@ -736,14 +736,18 @@ class JSONTest(_LiteralRoundTripFixture, fixtures.TablesTest):
     def _test_index_criteria(self, crit, expected):
         self._criteria_fixture()
         with config.db.connect() as conn:
+            stmt = select([self.tables.data_table.c.name]).where(crit)
+
             eq_(
-                conn.scalar(
-                    select([self.tables.data_table.c.name]).
-                    where(crit)
-                ),
+                conn.scalar(stmt),
                 expected
             )
 
+            literal_sql = str(stmt.compile(
+                config.db, compile_kwargs={"literal_binds": True}))
+
+            eq_(conn.scalar(literal_sql), expected)
+
     def test_crit_spaces_in_key(self):
         name = self.tables.data_table.c.name
         col = self.tables.data_table.c['data']