The following bug has been logged online:

Bug reference:      2905
Logged by:          Adriaan van Os
Email address:      [EMAIL PROTECTED]
PostgreSQL version: 8.1.4
Operating system:   Mac OS X 10.4.6, intel
Description:        min and max return incorrect text type
Details: 

Table 9-37. Aggregate Functions in the Postgres docs states that the return
type for min and max is the "same as argument type".

However, min(VARCHAROID) and max(VARCHAROID) return TEXTOID as a result
type.

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