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in reply to Flexible Update SQL

Look up "sql place holder". The query should really be written with placeholders similar to the following:

    my $sql = "UPDATE table SET phone = ?, city = ?"

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Peter (Guo) Pei

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Re^2: Flexible Update SQL
by bichonfrise74 (Vicar) on Dec 02, 2010 at 01:14 UTC
    But this does not solve the problems:
  • passing null parameters...
  • placement of the comma...
[reply]

      bichonfrise74:

      Actually, placeholders *do* handle the null parameter. Constructing the update statement can do the rest...

      my @fields = qw(name phone city country);
my $SQL = "update table set "
.         join(", ", map { "$_=?" } @fields)
.         "where ....";
my $ST=$DB->prepare($SQL);
while (...) {
    my @values = (.....);
    $ST->execute(@values);
}

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      ...roboticus

      When your only tool is a hammer, all problems look like your thumb.

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