class swat.cas.datamsghandlers.SQLQuery(query, engine, nrecs=1000, transformers=None, **kwargs)

Bases: swat.cas.datamsghandlers.PandasDataFrame

Create an SQLQuery data message handler

query : string

SQL query.

engine : sqlalchemy engine

sqlalchemy engine.

nrecs : int or long, optional

Number of records to send at a time.

**kwargs : any, optional

Arguments sent to pandas.io.sql.read_sql_query().

SQLQuery data message handler object

See also

pandas.io.sql.read_sql_query(), PandasDataFrame

__init__(query, engine, nrecs=1000, transformers=None, **kwargs)

Initialize self. See help(type(self)) for accurate signature.


__init__(query, engine[, nrecs, transformers]) Initialize self.
create_engine(*args, **kwargs) Return engine from sqlalchemy.create_engine()
finish(connection) Finish the data sending operation
getone(connection, **kwargs) Get a single response from the server
getrow(row) Get a row of values from the data source
send(connection, nrecs) Send the records to the connection
write(row, values) Write the value to the row and column specified in the buffer


args Property that generates the CAS action parameters for CAS actions that use a data message handler.