[IMP] util/pg: cache column_exists for common columns

In many cases we know that columns must exist, it's better to cache them
to avoid thousands of small queries.

Author: aj-fuentes

src/util/pg.py

@@ -2,6 +2,7 @@
 """Utility functions for interacting with PostgreSQL."""
 
 import collections
+import functools
 import logging
 import os
 import re
@@ -43,7 +44,7 @@
 
 from .exceptions import MigrationError, SleepyDeveloperError
 from .helpers import _validate_table, model_of_table
-from .misc import Sentinel, log_progress
+from .misc import Sentinel, log_progress, version_gte
 
 _logger = logging.getLogger(__name__)
 
@@ -472,6 +473,29 @@ def _column_info(cr, table, column):
     return cr.fetchone()
 
 
+_COLUMNS = {}
+if version_gte("10.0"):  # before 10.0 it could be arch or arch_db, because it changed in 9.0
+    _COLUMNS[("ir_ui_view", "arch_db")] = True
+if not version_gte("8.0"):  # before 8.0 we know it was arch
+    _COLUMNS[("ir_ui_view", "arch_db")] = False
+if version_gte("14.0"):  # new from 13.0
+    _COLUMNS[("ir_module_module_dependency", "auto_install_required")] = False
+
+
+def _forced_cache(cache):
+    def decorator(f):
+        @functools.wraps(f)
+        def wrapper(cr, *args, **kwargs):
+            if not kwargs and tuple(args) in cache:
+                return cache[tuple(args)]
+            return f(cr, *args, **kwargs)
+
+        return wrapper
+
+    return decorator
+
+
+@_forced_cache(_COLUMNS)
 def column_exists(cr, table, column):
     """
     Return whether a column exists.