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Handle resume in OobNibbleIterator.

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This commit is contained in:
Daniel Nichter
2011-11-16 11:10:34 -07:00
parent 27456d00b7
commit 42bd00c4d6
2 changed files with 61 additions and 17 deletions
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18
lib/OobNibbleIterator.pm
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@@ -104,7 +104,21 @@ sub new {
$self->{past_upper_sql} = $past_upper_sql;
$self->{explain_past_lower_sql} = $explain_past_lower_sql;
$self->{explain_past_upper_sql} = $explain_past_upper_sql;
$self->{past_nibbles} = [qw(lower upper)]; # what we nibble
my @past_nibbles = qw(lower upper);
if ( my $nibble = $args{resume} ) {
if ( !defined $nibble->{lower_boundary} ) {
# Have past lower nibble, do only past upper nibble.
$self->{past_nibbles} = [qw(upper)];
}
elsif ( !defined $nibble->{upper_boundary} ) {
# Have past upper nibble, so the past lower nibble
# should have alredy been done. Nothing for us to do.
$self->{past_nibbles} = [];
}
}
MKDEBUG && _d('Nibble past', @past_nibbles);
$self->{past_nibbles} = \@past_nibbles,
}
return bless $self, $class;
@@ -131,7 +145,7 @@ sub statements {
sub _prepare_sths {
my ($self) = @_;
MKDEBUG && _d('Preparing boundless statement handles');
MKDEBUG && _d('Preparing out-of-bound statement handles');
# Prepare our statements for nibbles past the lower and upper boundaries.
if ( !$self->{one_nibble} ) {