This is a discussion on understanding output from Explain within the Pgsql General forums, part of the PostgreSQL category; --> "Seq Scan on" - is this just a FULL TABLE scan? I'm familiar with Oracles explain plans and terminology. ...
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| "Seq Scan on" - is this just a FULL TABLE scan? I'm familiar with Oracles explain plans and terminology. But not so much so with psql... ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org/ |
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| am Sun, dem 22.04.2007, um 9:43:32 -0400 mailte Tom Allison folgendes: > "Seq Scan on" - is this just a FULL TABLE scan? Yes. Andreas -- Andreas Kretschmer Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header) GnuPG-ID: 0x3FFF606C, privat 0x7F4584DA http://wwwkeys.de.pgp.net ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match |
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| Is there a tutorial on this stuff? I did check the Really Fine Manual and they said explain plans are beyond the scope RTFM. On Apr 22, 2007, at 10:36 AM, A. Kretschmer wrote: > am Sun, dem 22.04.2007, um 9:43:32 -0400 mailte Tom Allison > folgendes: >> "Seq Scan on" - is this just a FULL TABLE scan? > > Yes. > > > Andreas > -- > Andreas Kretschmer > Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header) > GnuPG-ID: 0x3FFF606C, privat 0x7F4584DA http://wwwkeys.de.pgp.net > > ---------------------------(end of > broadcast)--------------------------- > TIP 9: In versions below 8.0, the planner will ignore your desire to > choose an index scan if your joining column's datatypes do not > match ---------------------------(end of broadcast)--------------------------- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq |