python DB-API paramstyle converter
Project description
Python DB-API paramstyle converter
Problem
The DB-API is one of the greatest feature in our python-world. But paramstyle...
module | paramstyle |
---|---|
sqlite3 | qmark |
mysql-connector-python | pyformat |
mysqlclient | format |
mariadb | qmark |
psycopg2 | pyformat |
psycopg | pyformat |
py-postgresql | pyformat |
pyodbc | qmark |
pymssql | pyformat |
python-oracledb | named |
duckdb | qmark |
firebird-driver | qmark |
pydrda | format |
pymonetdb | pyformat |
pyhive.hive/presto | pyformat |
- qmark:
?
,?
- pyformat:
%(name)s
,%(arg)s
- format:
%s
,%s
- named:
:name
,:arg
- numeric:
:1
,:2
Install
- pip install pstyle
test with CLI
# pstyle --help
Usage: pstyle [OPTIONS] COMMAND [ARGS]...
Options:
--version Show the version and exit.
--help Show this message and exit.
Commands:
convert convert SQL and params with specified paramstyle
# pstyle convert --args hello --args world --from-style qmark --to-style format "select * from tbl1 where `key`=? and `value`=?"
op: SELECT * FROM tbl1 WHERE `key`=%s AND `value`=%s
args: ('hello', 'world')
# pstyle convert --args world --args hello --from-style numeric --to-style qmark "select * from tbl1 where `key`=:2 and `value`=:1"
op: SELECT * FROM tbl1 WHERE `key`=? AND `value`=?
args: ('hello', 'world')
using docker
# docker run --rm ghcr.io/wtnb75/pstyle convert --help
Usage: pstyle convert [OPTIONS] OPERATION
convert SQL and params with specified paramstyle
Options:
--verbose / --quiet
--from-style [named|pyformat|qmark|numeric|format|auto]
--to-style [named|pyformat|qmark|numeric|format]
--args TEXT
--kwargs TEXT json
--normalize / --original [default: normalize]
--help Show this message and exit.
convert from str, args
import sqlite3
from pstyle.convert import Pstyle
db = sqlite3.connect(":memory:")
print("paramstyle:", sqlite3.paramstyle) # qmark
cursor = db.cursor()
cursor.execute(*Pstyle.convert("numeric", sqlite3.paramstyle, "select * from tbl1 where id=:2 and val=:1", ("val1", 1)))
# -> cursor.execute("SELECT * FROM tbl1 WHERE id=? AND val=?", (1, "val1"))
wrap DB connection instance
import sqlite3
from pstyle.wrapper import DBWrapper
db = sqlite3.connect(":memory:")
print("paramstyle:", sqlite3.paramstyle) # qmark
db2 = DBWrapper(db, sqlite3.paramstyle, "numeric")
cursor = db2.cursor()
cursor.execute("select * from tbl1 where id=:2 and val=:1", ("val1", 1))
# -> SELECT * FROM tbl1 WHERE id=? AND val=?, (1, "val1")
result = cursor.fetchone()
wrap cursor instance
import sqlite3
from pstyle.wrapper import CursorWrapper
db = sqlite3.connect(":memory:")
print("paramstyle:", sqlite3.paramstyle) # qmark
cursor = CursorWrapper(db.cursor(), sqlite3.paramstyle, "numeric")
cursor.execute("select * from tbl1 where id=:2 and val=:1", ("val1", 1))
# -> SELECT * FROM tbl1 WHERE id=? AND val=?, (1, "val1")
result = cursor.fetchone()
try Python REPL with db connection
# pstyle try-db 'sqlite3://:memory:'
db(qmark): db.execute(...)
wrapped(auto): wrapped.execute(...)
Python 3.12.4 (main, Jun 20 2024, 00:32:08) [Clang 15.0.0 (clang-1500.3.9.4)]
Type 'copyright', 'credits' or 'license' for more information
IPython 8.21.0 -- An enhanced Interactive Python. Type '?' for help.
In [1]: wrapped.execute("create table tbl1 (id integer, val varchar)")
Out[1]: <sqlite3.Cursor at 0x10c519040>
In [2]: wrapped.execute("insert into tbl1 (id, val) values (%s, %s), (%s, %s)", (1, "val1", 2, "val2")).fetchall()
Out[2]: []
In [3]: wrapped.execute("select * from tbl1").fetchall()
Out[3]: [(1, 'val1'), (2, 'val2')]
In [4]: wrapped.execute("select * from tbl1 where id=:key1", dict(key1=1)).fetchall()
Out[4]: [(1, 'val1')]
In [5]: wrapped.execute("select * from tbl1 where id=:key1", dict(key1=2)).fetchall()
Out[5]: [(2, 'val2')]
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