The following bug has been logged online:

Bug reference:      2450
Logged by:          Anjali
Email address:      [EMAIL PROTECTED]
PostgreSQL version: 7.4.8
Operating system:   fedora core3
Description:        change the type of existing column
Details: 

i am getting difficulty to change the type of the existing table in
postgresql.
is this version of postgresql supported change of data type of the existing
column.
plz reply me as soon as possible.

---------------------------(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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