<br /><p><font face="Arial" size="2">Have a question regarding when a Query Plan uses an Index.</font><p><font
face="Arial"size="2">I have a basic statement</font><p><font face="Arial" size="2">This query uses the Index
Scan:</font><br/><font face="Arial" size="2">explain analyse select * from tablea where columna_id <
57</font><p><fontface="Arial" size="2">This query uses Seq Scan:</font><br /><font face="Arial" size="2">explain
analyseselect * from tablea where columna_id < 58</font><p><font face="Arial" size="2">There are about 5000 records
inthis table, and columna_id is the primary key, which is Indexed... And recently recreated.</font><p><font
face="Arial"size="2">My question is why is the Plan not using the index on the second occasions?</font><p><font
face="Arial"size="2">Theo</font><table><tr><td bgcolor="#ffffff"><font
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