+my @statements = dbdef->sql_update_schema( dbdef_dist(datasrc),
+ $dbh,
+ { 'nullify_default' => 1, },
+ );
+
+#### NEW CUSTOM FIELDS:
+# 1. prevent new custom field columns from being dropped by upgrade
+# 2. migrate old virtual fields to real fields (new custom fields)
+####
+my $cfsth = $dbh->prepare("SELECT * FROM part_virtual_field")
+ or die $dbh->errstr;
+$cfsth->execute or die $cfsth->errstr;
+my $cf;
+while ( $cf = $cfsth->fetchrow_hashref ) {
+ my $tbl = $cf->{'dbtable'};
+ my $name = $cf->{'name'};
+ $name = lc($name) unless driver_name =~ /^mysql/i;
+
+ @statements = grep { $_ !~ /^\s*ALTER\s+TABLE\s+(h_|)$tbl\s+DROP\s+COLUMN\s+cf_$name\s*$/i }
+ @statements;
+ push @statements,
+ "ALTER TABLE $tbl ADD COLUMN cf_$name varchar(".$cf->{'length'}.")"
+ unless (dbdef->table($tbl) && dbdef->table($tbl)->column("cf_$name"));
+ push @statements,
+ "ALTER TABLE h_$tbl ADD COLUMN cf_$name varchar(".$cf->{'length'}.")"
+ unless (dbdef->table("h_$tbl") && dbdef->table("h_$tbl")->column("cf_$name"));
+}
+warn "Custom fields schema upgrade completed";
+
+@statements =
+ grep { $_ !~ /^CREATE +INDEX +h_queue/i } #useless, holds up queue insertion
+ @statements;
+
+unless ( driver_name =~ /^mysql/i ) {
+ #not necessary under non-mysql, takes forever on big db
+ @statements =
+ grep { $_ !~ /^ *ALTER +TABLE +h_queue +ALTER +COLUMN +job +TYPE +varchar\(512\) *$/i }
+ @statements;
+}
+