That is bizarre. Does EXPLAIN show any difference? ---------------------------------------------------------------------------
Merlin Moncure wrote: > I have a strange but reproducible problem where a query does not seem to > return the same results. > > esp=# select 1::int4, * from data1.po_line_file > esp-# where pol_po_no = '00000002' and > esp-# (pol_po_no = '00000002' and pol_po_rel_no = 0) and > esp-# (pol_po_no = '00000002' and pol_po_rel_no = 0 and > pol_item_no = '1570') > esp-# limit 1 ; > [fields omitted] > (0 rows) > > esp=# select 1::int4, * from data1.po_line_file > esp-# where --pol_po_no = '00000002' and > esp-# --(pol_po_no = '00000002' and pol_po_rel_no = 0) and > esp-# (pol_po_no = '00000002' and pol_po_rel_no = 0 and > pol_item_no = '1570') > esp-# limit 1 ; > [fields omitted, note commented redundant clauses] > (1 row) > > The obviously silly Boolean clause here was sql that was generated by a > driver. I recoded the driver to make more intelligent sql and now the > problem is gone, at least from my application. Note that the same query > form but with different tables/fields works correctly 99.99999% of the > time, just not this time...I'm just curious as to how two seemingly > equivalent statements could produce different results...perhpaps I > missed something? > > Merlin > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/docs/faqs/FAQ.html > -- Bruce Momjian | http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073 ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])
