From a8abc496323f741d3218d298d5d2bb118fa01017 Mon Sep 17 00:00:00 2001
From: Neelesh Salian <nssalian@users.noreply.github.com>
Date: Fri, 27 Jan 2023 17:00:39 -0800
Subject: [PATCH] [CT-1940] Stand-alone Python module for PostgresColumn
 (#6773)

---
 .changes/unreleased/Features-20230127-162812.yaml  |  6 ++++++
 plugins/postgres/dbt/adapters/postgres/__init__.py |  2 +-
 plugins/postgres/dbt/adapters/postgres/column.py   | 12 ++++++++++++
 plugins/postgres/dbt/adapters/postgres/impl.py     |  2 +-
 plugins/postgres/dbt/adapters/postgres/relation.py | 12 ------------
 5 files changed, 20 insertions(+), 14 deletions(-)
 create mode 100644 .changes/unreleased/Features-20230127-162812.yaml
 create mode 100644 plugins/postgres/dbt/adapters/postgres/column.py

diff --git a/.changes/unreleased/Features-20230127-162812.yaml b/.changes/unreleased/Features-20230127-162812.yaml
new file mode 100644
index 00000000000..8076cf3b18d
--- /dev/null
+++ b/.changes/unreleased/Features-20230127-162812.yaml
@@ -0,0 +1,6 @@
+kind: Features
+body: Stand-alone Python module for PostgresColumn
+time: 2023-01-27T16:28:12.212427-08:00
+custom:
+  Author: nssalian
+  Issue: "6772"
diff --git a/plugins/postgres/dbt/adapters/postgres/__init__.py b/plugins/postgres/dbt/adapters/postgres/__init__.py
index b5b3b7b7a09..38dce8bdb22 100644
--- a/plugins/postgres/dbt/adapters/postgres/__init__.py
+++ b/plugins/postgres/dbt/adapters/postgres/__init__.py
@@ -1,7 +1,7 @@
 # these are mostly just exports, #noqa them so flake8 will be happy
 from dbt.adapters.postgres.connections import PostgresConnectionManager  # noqa
 from dbt.adapters.postgres.connections import PostgresCredentials
-from dbt.adapters.postgres.relation import PostgresColumn  # noqa
+from dbt.adapters.postgres.column import PostgresColumn  # noqa
 from dbt.adapters.postgres.relation import PostgresRelation  # noqa: F401
 from dbt.adapters.postgres.impl import PostgresAdapter
 
diff --git a/plugins/postgres/dbt/adapters/postgres/column.py b/plugins/postgres/dbt/adapters/postgres/column.py
new file mode 100644
index 00000000000..686ec0cb8a4
--- /dev/null
+++ b/plugins/postgres/dbt/adapters/postgres/column.py
@@ -0,0 +1,12 @@
+from dbt.adapters.base import Column
+
+
+class PostgresColumn(Column):
+    @property
+    def data_type(self):
+        # on postgres, do not convert 'text' or 'varchar' to 'varchar()'
+        if self.dtype.lower() == "text" or (
+            self.dtype.lower() == "character varying" and self.char_size is None
+        ):
+            return self.dtype
+        return super().data_type
diff --git a/plugins/postgres/dbt/adapters/postgres/impl.py b/plugins/postgres/dbt/adapters/postgres/impl.py
index 9a5d5d3f8f6..9d729b5148e 100644
--- a/plugins/postgres/dbt/adapters/postgres/impl.py
+++ b/plugins/postgres/dbt/adapters/postgres/impl.py
@@ -5,7 +5,7 @@
 from dbt.adapters.base.impl import AdapterConfig
 from dbt.adapters.sql import SQLAdapter
 from dbt.adapters.postgres import PostgresConnectionManager
-from dbt.adapters.postgres import PostgresColumn
+from dbt.adapters.postgres.column import PostgresColumn
 from dbt.adapters.postgres import PostgresRelation
 from dbt.dataclass_schema import dbtClassMixin, ValidationError
 from dbt.exceptions import (
diff --git a/plugins/postgres/dbt/adapters/postgres/relation.py b/plugins/postgres/dbt/adapters/postgres/relation.py
index 43c8c724a74..820a69b0c64 100644
--- a/plugins/postgres/dbt/adapters/postgres/relation.py
+++ b/plugins/postgres/dbt/adapters/postgres/relation.py
@@ -1,4 +1,3 @@
-from dbt.adapters.base import Column
 from dataclasses import dataclass
 from dbt.adapters.base.relation import BaseRelation
 from dbt.exceptions import DbtRuntimeError
@@ -21,14 +20,3 @@ def __post_init__(self):
 
     def relation_max_name_length(self):
         return 63
-
-
-class PostgresColumn(Column):
-    @property
-    def data_type(self):
-        # on postgres, do not convert 'text' or 'varchar' to 'varchar()'
-        if self.dtype.lower() == "text" or (
-            self.dtype.lower() == "character varying" and self.char_size is None
-        ):
-            return self.dtype
-        return super().data_type