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executemany with select

From: Damon Fasching <fasching(at)design(dot)lbl(dot)gov>
To: pgsql-novice(at)postgresql(dot)org
Subject: executemany with select
Date: 2002-03-05 03:13:38
Message-ID: Pine.SOL.3.96.1020304190531.18973F-100000@design.lbl.gov (view raw or flat)
Thread:
Lists: pgsql-novice
Hi,

If executemany(queryString, sequence) is used with a SELECT query, as in 
the example below, it seems that the cursor retains only the data from the
last member of sequence.  Can someone verify this? No big deal, just
trying to get my usage correct.

Thanks,
 Damon

## ===================================================================

import psycopg

conn = psycopg.connect('testdb')
curs = conn.cursor()

curs.execute("CREATE TABLE testtb (key int4, data text)")

s = ((0, 'row1'), (1, 'row2'))
curs.executemany("INSERT INTO testtb VALUES (%d, %s)", s)

keys = ((0,), (1,))
curs.executemany("SELECT name FROM testtb WHERE key = %d", keys)

rows = curs.fetchall()
for row in rows: print row, "\n"

## ==================================================================

produces the output
>>> ('row2',)

---------

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  shine on the Truth some day		L Cohen


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