Hi Michael and Simon - Thank you for your responses and help. Sorry I
should have provided more details.
Putting in the raise gave this error trace blow.
It says it cannot execute more than one line at a time. It says the same
even if I do not have it in a transaction block, but in this case I do.
Meaning if just do a: conn.execute(scriptFile) - it says cannot execute
more than 1 statement at a time, which is the same error I am getting with
the transaction.
...
In this case I do a try catch as in:
conn = engine.connect() transact =
conn.begin() try: conn.execute(scriptFile) transact.commit() except: raise
transact.rollback()
With scriptFile being just a string with 4 CREATE TABLE statements with 3 -
10 fields each.
The scriptFile does have '/n' and '/t' (newlines/tabs) in each line of
fields in the CREATE TABLE statements.
And as I said before I can execute the same statements (with the /n and /t)
1 at a time with either the sqlalchemy or sqlite3 drivers, no problem.
Eventually I do want to run these in PostgresSQL so I assume it is not a
SQLite3 issue. I do need to run on SQLite3 as well.
Btw, in my use case, while I can run the CREATE TABLEs 1 at a time
eventually I do have to run CREATE INDEXES / FKs / INITIAL DATA LOAD
multiple at a time, so I would like to get the multiple statements working
right.
...
This is the error raise generates - at the end it says it can only execute
1 statement at a time but it s warning.
2013-09-21 10:47:35,543 INFO sqlalchemy.engine.base.Engine BEGIN (implicit)
2013-09-21 10:47:35,543 INFO sqlalchemy.engine.base.Engine
... then shows the CREATE TABLE statements ...
2013-09-21 10:47:35,543 INFO sqlalchemy.engine.base.Engine ()
Traceback (most recent call last):
File "dbms.model/python3/Controller.py", line 54, in <module>
if __name__ == "__main__": main()
File "dbms.model/python3/Controller.py", line 50, in main
controller.initiateEnvironment()
... lines from traceback in my code
... end of traceback from SQLAlchemy driver below ...
File "/space/development/python/dbms.model/python3/DBMS/ExecutorSQL.py",
line 47, in executeCreateOnSQLite2
conn.execute(scriptFile)
File "/usr/local/lib/python3.3/dist-packages/sqlalchemy/engine/base.py",
line 662, in execute
params)
File "/usr/local/lib/python3.3/dist-packages/sqlalchemy/engine/base.py",
line 805, in _execute_text
statement, parameters
File "/usr/local/lib/python3.3/dist-packages/sqlalchemy/engine/base.py",
line 874, in _execute_context
context)
File "/usr/local/lib/python3.3/dist-packages/sqlalchemy/engine/base.py",
line 1027, in _handle_dbapi_exception
util.reraise(*exc_info)
File "/usr/local/lib/python3.3/dist-packages/sqlalchemy/util/compat.py",
line 183, in reraise
raise value
File "/usr/local/lib/python3.3/dist-packages/sqlalchemy/engine/base.py",
line 867, in _execute_context
context)
File
"/usr/local/lib/python3.3/dist-packages/sqlalchemy/engine/default.py", line
326, in do_execute
cursor.execute(statement, parameters)
sqlite3.Warning: You can only execute one statement at a time.
...
Hope this helps.
Please let me know if you need anything else.
Thank you again for all your help.
Mono
On Friday, September 20, 2013 7:07:57 PM UTC-4, Simon King wrote:
>
>
> On 20 Sep 2013, at 08:15, monosij...@gmail.com <javascript:> wrote:
>
> >
> > I am trying to create multiple tables from a set of 'create table'
> scripts.The set of scripts are in a list and I am executing as below.
> >
> > The scripts create tables, all scripts tested and work through the
> sqlite3 driver fine - one at a time.
> >
> > However, through the sqlarchemy driver when I try as below - only a few
> of the tables get created, ie the script gets executed.
> >
> > The scripts (for the tables) always come in the same order but randomly
> a few gets executed, somes 1st,2nd or 1st,3rd; etc.
> >
> > The same scripts iterated from the same list get created fine using
> sqlite3 driver as mentioned, with no issues.
> >
> > However only a few of the tables get when I try the following, and then
> there is an error which causes the rollback from the script that failed and
> it exits.
> >
> > Any suggestions will be very appreciated as I actually plan to use the
> scripts for Postgres eventually.
> >
> > Btw I also try executing them all together by trying to execute the list
> - that also failed. Eventually i would like to try and bulk execute if
> possible, but not urgent for 'create table'
> >
> > Thank you for your help.
> >
> > Mono
> >
> > ...
> > dbms = 'sqlite:////dataSpace/sqlite3/test.sqlite3'
> > engine = create_engine(dbms, echo = True)
> > t = conn.begin()
> > try:
> > for script in scripts:
> > print (script)
> > conn.execute(script) # I tried executing scripts all together
> as well but failed.
> > t.commit() # I tried commit outside the for as well
> > executed = True
> > except:
> > t.rollback()
> > …
> >
>
> If your script really looks like this, then you are suppressing any error
> messages that might be happening during the import with your "except"
> clause. Trying putting a bare "raise" after the t.rollback() so that your
> script aborts after an exception.
>
> Simon
>
>
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