diff options
Diffstat (limited to 'lib/sqlalchemy/dialects')
| -rw-r--r-- | lib/sqlalchemy/dialects/mysql/base.py | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/sqlalchemy/dialects/mysql/base.py b/lib/sqlalchemy/dialects/mysql/base.py index cbb108f5e..8d62bae02 100644 --- a/lib/sqlalchemy/dialects/mysql/base.py +++ b/lib/sqlalchemy/dialects/mysql/base.py @@ -1710,10 +1710,17 @@ class MySQLCompiler(compiler.SQLCompiler): def visit_cast(self, cast, **kwargs): # No cast until 4, no decimals until 5. if not self.dialect._supports_cast: + util.warn( + "Current MySQL version does not support " + "CAST; the CAST will be skipped.") return self.process(cast.clause.self_group()) type_ = self.process(cast.typeclause) if type_ is None: + util.warn( + "Datatype %s does not support CAST on MySQL; " + "the CAST will be skipped." % + self.dialect.type_compiler.process(cast.typeclause.type)) return self.process(cast.clause.self_group()) return 'CAST(%s AS %s)' % (self.process(cast.clause), type_) |