Disable supports_statement_cache (#249)

* refactor(dialect): disable supports_statement_cache * Update CHANGES.rst
sqlalchemy-redshift · May 10, 2022 · 065833c · 065833c
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diff --git a/CHANGES.rst b/CHANGES.rst
@@ -1,9 +1,10 @@
 0.8.10 (unreleased)
 -------------------
 
-- Nothing changed yet.
 - Support HLLSKETCH Redshift datatypes
   (`Pull #246 <https://github.com/sqlalchemy-redshift/sqlalchemy-redshift/pull/246>`_)
+- Disable supports_statement_cache
+  (`Pull #249 <https://github.com/sqlalchemy-redshift/sqlalchemy-redshift/pull/249>`_)
 
 0.8.9 (2021-12-15)
 ------------------

diff --git a/sqlalchemy_redshift/dialect.py b/sqlalchemy_redshift/dialect.py
@@ -555,6 +555,9 @@ class RedshiftDialectMixin(DefaultDialect):
 
     name = 'redshift'
     max_identifier_length = 127
+    # explicitly disables statement cache to disable warnings in logs
+    # ref: https://docs.sqlalchemy.org/en/14/core/connections.html#caching-for-third-party-dialects
+    supports_statement_cache = False
 
     statement_compiler = RedshiftCompiler
     ddl_compiler = RedshiftDDLCompiler