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PT-1757 Implemented fallback in NibbleIterator

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Since now NibbleIterator can fallback to nibble (from one chunk) pt-osc
can nibble tables even if due to unacurate stats, it choses one nible as
the initial nibbling method.
This commit is contained in:
Carlos Salguero
2019-10-13 21:58:56 -03:00
parent e58b9fbea8
commit 6a302e2b07
12 changed files with 549 additions and 398 deletions
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72
t/lib/NibbleIterator.t
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@@ -39,7 +39,7 @@ my $dbh = $sb->get_dbh_for('master');
if ( !$dbh ) {
plan skip_all => 'Cannot connect to sandbox master';
} else {
plan tests => 62;
plan tests => 56;
}
my $q = new Quoter();
@@ -896,76 +896,6 @@ is(
"Use non-unique index with highest cardinality (bug 1199591)"
);
$sb->load_file('master', "t/lib/samples/NibbleIterator/enum_keys.sql");
$ni = undef;
eval {
$ni = make_nibble_iter(
db => 'test',
tbl => 't1',
argv => [qw(--databases test --chunk-size 3)],
);
};
like(
$EVAL_ERROR,
qr/The index f3 in table `test`.`t1` has unsorted enum items/,
"PT-1572 Die on unsorted enum items in index",
);
eval {
$ni = make_nibble_iter(
db => 'test',
tbl => 't1',
argv => [qw(--databases test --force-concat-enums --chunk-size 3)],
);
};
like(
$ni->{explain_first_lb_sql},
qr/ORDER BY `f1`, `f2`, CONCAT\(`f3`\)/,
"PT-1572 Use of CONCAT for unsorted ENUM field items without --",
);
eval {
$ni = make_nibble_iter(
db => 'test',
tbl => 't2',
argv => [qw(--databases test --chunk-size 3)],
);
};
is(
$EVAL_ERROR,
'',
"PT-1572 No errors on sorted enum items in index",
);
like(
$ni->{explain_first_lb_sql},
qr/ORDER BY `f1`, `f2`, `f3`/,
"PT-1572 Don't use CONCAT for sorted ENUM field items without --force-concat-enums",
);
eval {
$ni = make_nibble_iter(
db => 'test',
tbl => 't1',
argv => [qw(--databases test --chunk-size 3 --chunk-index-columns 2)],
);
};
is(
$EVAL_ERROR,
'',
"PT-1572 No errors on unsorted enum items in index and --chunk-index-columns",
);
like(
$ni->{explain_first_lb_sql},
qr/ORDER BY `f1`, `f2`, `f3`/,
"PT-1572 Don't use CONCAT for sorted ENUM field items without --force-concat-enums & --chunk-index-columns",
);
# #############################################################################
# Done.
# #############################################################################