- Support has been improved for Postgresql reflection behavior on very old

(pre 8.1) versions of Postgresql, and potentially other PG engines
such as Redshift (assuming Redshift reports the version as < 8.1).
The query for "indexes" as well as "primary keys" relies upon inspecting
a so-called "int2vector" datatype, which refuses to coerce to an array
prior to 8.1 causing failures regarding the "ANY()" operator used
in the query.  Extensive googling has located the very hacky, but
recommended-by-PG-core-developer query to use when PG version < 8.1
is in use, so index and primary key constraint reflection now work
on these versions.

4 files changed, 12 insertions, 7 deletions

diff --git a/test/dialect/postgresql/test_dialect.py b/test/dialect/postgresql/test_dialect.py
index fd6df2c98..7f22c6a6b 100644
--- a/test/dialect/postgresql/test_dialect.py
+++ b/test/dialect/postgresql/test_dialect.py
@@ -205,6 +205,7 @@ class MiscTest(fixtures.TestBase, AssertsExecutionResults, AssertsCompiledSQL):
                     : Numeric})
         assert_raises(exc.InvalidRequestError, testing.db.execute, stmt)
 
+    @testing.only_if("postgresql >= 8.2", "requires standard_conforming_strings")
     def test_serial_integer(self):
 
         for version, type_, expected in [
diff --git a/test/dialect/postgresql/test_query.py b/test/dialect/postgresql/test_query.py
index ee5800db0..82b49d974 100644
--- a/test/dialect/postgresql/test_query.py
+++ b/test/dialect/postgresql/test_query.py
@@ -70,6 +70,7 @@ class InsertTest(fixtures.TestBase, AssertsExecutionResults):
         metadata.create_all()
         self._assert_data_with_sequence(table, 'my_seq')
 
+    @testing.requires.returning
     def test_sequence_returning_insert(self):
         table = Table('testtable', metadata, Column('id', Integer,
                       Sequence('my_seq'), primary_key=True),
@@ -84,6 +85,7 @@ class InsertTest(fixtures.TestBase, AssertsExecutionResults):
         metadata.create_all()
         self._assert_data_autoincrement(table)
 
+    @testing.requires.returning
     def test_opt_sequence_returning_insert(self):
         table = Table('testtable', metadata, Column('id', Integer,
                       Sequence('my_seq', optional=True),
@@ -97,6 +99,7 @@ class InsertTest(fixtures.TestBase, AssertsExecutionResults):
         metadata.create_all()
         self._assert_data_autoincrement(table)
 
+    @testing.requires.returning
     def test_autoincrement_returning_insert(self):
         table = Table('testtable', metadata, Column('id', Integer,
                       primary_key=True), Column('data', String(30)))
@@ -592,8 +595,7 @@ class ServerSideCursorsTest(fixtures.TestBase, AssertsExecutionResults):
 
 class MatchTest(fixtures.TestBase, AssertsCompiledSQL):
 
-    __only_on__ = 'postgresql'
-    __excluded_on__ = ('postgresql', '<', (8, 3, 0)),
+    __only_on__ = 'postgresql >= 8.3'
 
     @classmethod
     def setup_class(cls):
diff --git a/test/dialect/postgresql/test_reflection.py b/test/dialect/postgresql/test_reflection.py
index 705a64c8e..aefb6a0ba 100644
--- a/test/dialect/postgresql/test_reflection.py
+++ b/test/dialect/postgresql/test_reflection.py
@@ -20,7 +20,7 @@ class DomainReflectionTest(fixtures.TestBase, AssertsExecutionResults):
 
     """Test PostgreSQL domains"""
 
-    __only_on__ = 'postgresql'
+    __only_on__ = 'postgresql > 8.2'
 
     @classmethod
     def setup_class(cls):
@@ -128,8 +128,8 @@ class DomainReflectionTest(fixtures.TestBase, AssertsExecutionResults):
 class ReflectionTest(fixtures.TestBase):
     __only_on__ = 'postgresql'
 
-    @testing.fails_if(('postgresql', '<', (8, 4)),
-            "newer query is bypassed due to unsupported SQL functions")
+    @testing.fails_if("postgresql < 8.4",
+                    "Better int2vector functions not available")
     @testing.provide_metadata
     def test_reflected_primary_key_order(self):
         meta1 = self.metadata
@@ -170,6 +170,8 @@ class ReflectionTest(fixtures.TestBase):
         eq_(
             t.c.x.server_default.arg.text, "'%s'::character varying" % ("abcd" * 40)
         )
+
+    @testing.fails_if("postgresql < 8.1", "schema name leaks in, not sure")
     @testing.provide_metadata
     def test_renamed_sequence_reflection(self):
         metadata = self.metadata
diff --git a/test/dialect/postgresql/test_types.py b/test/dialect/postgresql/test_types.py
index ba4b63e1a..4540b7537 100644
--- a/test/dialect/postgresql/test_types.py
+++ b/test/dialect/postgresql/test_types.py
@@ -102,7 +102,7 @@ class FloatCoercionTest(fixtures.TablesTest, AssertsExecutionResults):
 
 class EnumTest(fixtures.TestBase, AssertsExecutionResults):
 
-    __only_on__ = 'postgresql'
+    __only_on__ = 'postgresql > 8.3'
 
 
     @testing.fails_on('postgresql+zxjdbc',
@@ -908,7 +908,7 @@ class SpecialTypesTest(fixtures.TestBase, ComparesTables, AssertsCompiledSQL):
 class UUIDTest(fixtures.TestBase):
     """Test the bind/return values of the UUID type."""
 
-    __only_on__ = 'postgresql'
+    __only_on__ = 'postgresql >= 8.3'
 
     @testing.fails_on('postgresql+zxjdbc',
                       'column "data" is of type uuid but expression is of type character varying')