adding new sqlalchemy code examples

Author: mattmakai

content/pages/examples/sqlalchemy/sqlalchemy-dialects-mssql.markdown

@@ -1,4 +1,4 @@
-title: sqlalchemy.dialects mssql code examples
+title: sqlalchemy.dialects mssql Example Code
 category: page
 slug: sqlalchemy-dialects-mssql-examples
 sortorder: 500031000

content/pages/examples/sqlalchemy/sqlalchemy-dialects-mysql-pymysql.markdown

@@ -0,0 +1,85 @@
+title: sqlalchemy.dialects.mysql pymysql Example Code
+category: page
+slug: sqlalchemy-dialects-mysql-pymysql-examples
+sortorder: 500031005
+toc: False
+sidebartitle: sqlalchemy.dialects.mysql pymysql
+meta: Python example code for the pymysql callable from the sqlalchemy.dialects.mysql module of the SQLAlchemy project.
+
+
+pymysql is a callable within the sqlalchemy.dialects.mysql module of the SQLAlchemy project.
+
+
+## Example 1 from databases
+[databases](https://github.com/encode/databases)
+([project homepage](https://www.encode.io/databases/)
+and
+[PyPI page](https://pypi.org/project/databases/) provides
+[asyncio](https://docs.python.org/3/library/asyncio.html) support
+with an [SQLALchemy](/sqlalchemy.html) Core interface for common
+[relational databases](/databases.html) such as [MySQL](/mysql.html),
+[PostgreSQL](/postgresql.html) and [SQLite](/sqlite.html). This is
+handy for integrating with asynchronous I/O
+[web frameworks](/web-frameworks.html) like [Sanic](/sanic.html).
+The project is open sourced under the
+[BSD 3-Clause "New" or "Revised" License](https://github.com/encode/databases/blob/master/LICENSE.md).
+
+[**databases / databases / backends / mysql.py**](https://github.com/encode/databases/blob/master/databases/backends/mysql.py)
+
+```python
+# mysql.py
+import getpass
+import logging
+import typing
+import uuid
+
+import aiomysql
+~~from sqlalchemy.dialects.mysql import pymysql
+from sqlalchemy.engine.interfaces import Dialect, ExecutionContext
+from sqlalchemy.engine.result import ResultMetaData, RowProxy
+from sqlalchemy.sql import ClauseElement
+from sqlalchemy.types import TypeEngine
+
+from databases.core import LOG_EXTRA, DatabaseURL
+from databases.interfaces import ConnectionBackend, DatabaseBackend, TransactionBackend
+
+logger = logging.getLogger("databases")
+
+
+class MySQLBackend(DatabaseBackend):
+    def __init__(
+        self, database_url: typing.Union[DatabaseURL, str], **options: typing.Any
+    ) -> None:
+        self._database_url = DatabaseURL(database_url)
+        self._options = options
+~~        self._dialect = pymysql.dialect(paramstyle="pyformat")
+        self._dialect.supports_native_decimal = True
+        self._pool = None
+
+    def _get_connection_kwargs(self) -> dict:
+        url_options = self._database_url.options
+
+        kwargs = {}
+        min_size = url_options.get("min_size")
+        max_size = url_options.get("max_size")
+        ssl = url_options.get("ssl")
+
+        if min_size is not None:
+            kwargs["minsize"] = int(min_size)
+        if max_size is not None:
+            kwargs["maxsize"] = int(max_size)
+        if ssl is not None:
+            kwargs["ssl"] = {"true": True, "false": False}[ssl.lower()]
+
+        for key, value in self._options.items():
+            if key == "min_size":
+                key = "minsize"
+            elif key == "max_size":
+                key = "maxsize"
+            kwargs[key] = value
+
+
+## ... source file continues with no further pymysql examples...
+
+```
+

content/pages/examples/sqlalchemy/sqlalchemy-dialects-mysql.markdown

@@ -1,4 +1,4 @@
-title: sqlalchemy.dialects mysql code examples
+title: sqlalchemy.dialects mysql Example Code
 category: page
 slug: sqlalchemy-dialects-mysql-examples
 sortorder: 500031001

content/pages/examples/sqlalchemy/sqlalchemy-dialects-oracle.markdown

@@ -1,4 +1,4 @@
-title: sqlalchemy.dialects oracle code examples
+title: sqlalchemy.dialects oracle Example Code
 category: page
 slug: sqlalchemy-dialects-oracle-examples
 sortorder: 500031002

content/pages/examples/sqlalchemy/sqlalchemy-dialects-postgresql-array.markdown

@@ -1,7 +1,7 @@
-title: sqlalchemy.dialects.postgresql ARRAY code examples
+title: sqlalchemy.dialects.postgresql ARRAY Example Code
 category: page
 slug: sqlalchemy-dialects-postgresql-array-examples
-sortorder: 500031005
+sortorder: 500031006
 toc: False
 sidebartitle: sqlalchemy.dialects.postgresql ARRAY
 meta: Python example code for the ARRAY constant from the sqlalchemy.dialects.postgresql module of the SQLAlchemy project.

content/pages/examples/sqlalchemy/sqlalchemy-dialects-postgresql-base-pgtypecompiler.markdown

@@ -1,7 +1,7 @@
-title: sqlalchemy.dialects.postgresql.base PGTypeCompiler code examples
+title: sqlalchemy.dialects.postgresql.base PGTypeCompiler Example Code
 category: page
 slug: sqlalchemy-dialects-postgresql-base-pgtypecompiler-examples
-sortorder: 500031013
+sortorder: 500031015
 toc: False
 sidebartitle: sqlalchemy.dialects.postgresql.base PGTypeCompiler
 meta: Python example code for the PGTypeCompiler class from the sqlalchemy.dialects.postgresql.base module of the SQLAlchemy project.

content/pages/examples/sqlalchemy/sqlalchemy-dialects-postgresql-bigint.markdown

@@ -1,7 +1,7 @@
-title: sqlalchemy.dialects.postgresql BIGINT code examples
+title: sqlalchemy.dialects.postgresql BIGINT Example Code
 category: page
 slug: sqlalchemy-dialects-postgresql-bigint-examples
-sortorder: 500031006
+sortorder: 500031007
 toc: False
 sidebartitle: sqlalchemy.dialects.postgresql BIGINT
 meta: Python example code for the BIGINT constant from the sqlalchemy.dialects.postgresql module of the SQLAlchemy project.

content/pages/examples/sqlalchemy/sqlalchemy-dialects-postgresql-bit.markdown

@@ -1,7 +1,7 @@
-title: sqlalchemy.dialects.postgresql BIT code examples
+title: sqlalchemy.dialects.postgresql BIT Example Code
 category: page
 slug: sqlalchemy-dialects-postgresql-bit-examples
-sortorder: 500031007
+sortorder: 500031008
 toc: False
 sidebartitle: sqlalchemy.dialects.postgresql BIT
 meta: Python example code for the BIT constant from the sqlalchemy.dialects.postgresql module of the SQLAlchemy project.

content/pages/examples/sqlalchemy/sqlalchemy-dialects-postgresql-double-precision.markdown

@@ -1,7 +1,7 @@
-title: sqlalchemy.dialects.postgresql DOUBLE_PRECISION code examples
+title: sqlalchemy.dialects.postgresql DOUBLE_PRECISION Example Code
 category: page
 slug: sqlalchemy-dialects-postgresql-double-precision-examples
-sortorder: 500031008
+sortorder: 500031009
 toc: False
 sidebartitle: sqlalchemy.dialects.postgresql DOUBLE_PRECISION
 meta: Python example code for the DOUBLE_PRECISION constant from the sqlalchemy.dialects.postgresql module of the SQLAlchemy project.

content/pages/examples/sqlalchemy/sqlalchemy-dialects-postgresql-excludeconstraint.markdown

@@ -1,7 +1,7 @@
-title: sqlalchemy.dialects.postgresql ExcludeConstraint code examples
+title: sqlalchemy.dialects.postgresql ExcludeConstraint Example Code
 category: page
 slug: sqlalchemy-dialects-postgresql-excludeconstraint-examples
-sortorder: 500031009
+sortorder: 500031010
 toc: False
 sidebartitle: sqlalchemy.dialects.postgresql ExcludeConstraint
 meta: Python example code for the ExcludeConstraint class from the sqlalchemy.dialects.postgresql module of the SQLAlchemy project.