Try using the following syntax: 

my $sth = $dbh->prepare ("SELECT * from timestamp_testing where start 
+= ?::timestamp");

[download]

BTW, the PostgreSQL client library libpq does not use ? but $1, $2, $3, etc. as placeholders (the DBD::Pg driver makes the conversion internally), that's why you see a $1 on the error string.

In reply to Re: Issue in prepare() and execute() in DBI by salva
in thread Issue in prepare() and execute() in DBI by abubacker

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