Forum OpenACS Q&A: Error in gc/admin/view-alerts.tcl?domain_id=1

The error code is <p>
[28/Dec/2000:12:39:00]
    Error: Ns_PgExec: result status: 7 message: ERROR:  Function
'decode(bpchar, unknown, unknown, unknown)' does not exist
        Unable to identify a function that satisfies the given
argument types
        You may need to add explicit typecasts

<p>

[28/Dec/2000:12:39:00]
    Error: dbinit: error(localhost::iigfdb,ERROR:  Function
'decode(bpchar, unknown, unknown, unknown)' does not exist
        Unable to identify a function that satisfies the given
argument types
        You may need to add explicit typecasts
    ): 'select cea.*, cea.alert_id,
    decode(valid_p,'f','t','f') as not_valid_p,
    upper(email) as upper_email, email
    from classified_email_alerts cea, users
    where cea.user_id = users.user_id
    and domain_id = 1
    order by not_valid_p, upper_email'

<p>

[28/Dec/2000:12:39:00]
    Error: Database operation "select" failed (exception NSDB, "Query
was not a statement returning rows.")
    Database operation "select" failed (exception NSDB, "Query was not
a statement returning rows.")
        while executing
    "ns_db select $db "select cea.*, cea.alert_id,
    decode(valid_p,'f','t','f') as not_valid_p,
    upper(email) as upper_email, email
    from classified_email_ale ..."
        invoked from within
    "set selection [ns_db select $db "select cea.*, cea.alert_id,
    decode(valid_p,'f','t','f') as not_valid_p,
    upper(email) as upper_email, email
    from class ..."
        (file "/web/iig.org.in/www/gc/admin/view-alerts.tcl" line 41)
        invoked from within
    "source $script"
        invoked from within
    "if ![file exists $script] {
                ns_returnnotfound $conn
        } else {
                source $script
        }"
        (procedure "ns_sourceproc" line 3)
        invoked from within
    "ns_sourceproc cns54 {}"
    Notice: Querying 'select ad_group_member_p(1,
system_administrator_group_id()) from dual;'

<p>This is the same error I was getting previously in ads.tcl due to
decode function but in theis view-alerts.tcl there is no decode
function . <p>
Help Please