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import os, plac
from sqlalchemy.ext.sqlsoup import SqlSoup
SQLKEYWORDS = set(['select', 'from', 'inner', 'join', 'outer', 'left', 'right']
) # and many others
DBTABLES = set(['table1', 'table2']) # you can read them from the db schema
COMPLETIONS = SQLKEYWORDS | DBTABLES
class SqlInterface(object):
commands = ['SELECT']
def __init__(self, dsn):
self.soup = SqlSoup(dsn)
def SELECT(self, argstring):
sql = 'SELECT ' + argstring
for row in self.soup.bind.execute(sql):
yield str(row) # the formatting can be much improved
rl_input = plac.ReadlineInput(
COMPLETIONS, histfile=os.path.expanduser('~/.sql_interface.history'),
case_sensitive=False)
def split_on_first_space(line, commentchar):
return line.strip().split(' ', 1) # ignoring comments
if __name__ == '__main__':
plac.Interpreter.call(SqlInterface, split=split_on_first_space,
stdin=rl_input, prompt='sql> ')
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