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Finish rewriting TableSyncer and updating its test. Add RowSyncerBidirectional.pm. Add GENLOG switch to start-sandbox.

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This commit is contained in:
Daniel Nichter
2011-12-21 12:10:57 -07:00
parent 4c8fd5c080
commit ec8471ba28
5 changed files with 512 additions and 252 deletions
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32
lib/NibbleIterator.pm
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@@ -84,6 +84,11 @@ sub new {
if ( !$index && !$one_nibble ) {
die "There is no good index and the table is oversized.";
}
my ($index_cols, $order_by);
if ( $index ) {
$index_cols = $tbl->{tbl_struct}->{keys}->{$index}->{cols};
$order_by = join(', ', map {$q->quote($_)} @{$index_cols});
}
my $tbl_struct = $tbl->{tbl_struct};
my $ignore_col = $o->get('ignore-columns') || {};
@@ -93,20 +98,20 @@ sub new {
if ( $one_nibble ) {
# If the chunk size is >= number of rows in table, then we don't
# need to chunk; we can just select all rows, in order, at once.
my $cols = ($args{select} ? $args{select}
: join(', ', map { $q->quote($_) } @cols));
my $from = $q->quote(@{$tbl}{qw(db tbl)});
my $nibble_sql
= ($args{dml} ? "$args{dml} " : "SELECT ")
. ($args{select} ? $args{select}
: join(', ', map { $q->quote($_) } @cols))
. " FROM " . $q->quote(@{$tbl}{qw(db tbl)})
. $cols
. " FROM $from "
. ($where ? " AND ($where)" : '')
. " /*checksum table*/";
MKDEBUG && _d('One nibble statement:', $nibble_sql);
my $explain_nibble_sql
= "EXPLAIN SELECT "
. ($args{select} ? $args{select}
: join(', ', map { $q->quote($_) } @cols))
. " FROM " . $q->quote(@{$tbl}{qw(db tbl)})
= "EXPLAIN SELECT $cols FROM $from"
. ($where ? " AND ($where)" : '')
. " /*explain checksum table*/";
MKDEBUG && _d('Explain one nibble statement:', $explain_nibble_sql);
@@ -117,11 +122,15 @@ sub new {
limit => 0,
nibble_sql => $nibble_sql,
explain_nibble_sql => $explain_nibble_sql,
sql => {
columns => $cols,
from => $from,
where => $where,
order_by => $order_by,
},
};
}
else {
my $index_cols = $tbl->{tbl_struct}->{keys}->{$index}->{cols};
# Figure out how to nibble the table with the index.
my $asc = $args{TableNibbler}->generate_asc_stmt(
%args,
@@ -135,8 +144,7 @@ sub new {
# Make SQL statements, prepared on first call to next(). FROM and
# ORDER BY are the same for all statements. FORCE IDNEX and ORDER BY
# are needed to ensure deterministic nibbling.
my $from = $q->quote(@{$tbl}{qw(db tbl)}) . " FORCE INDEX(`$index`)";
my $order_by = join(', ', map {$q->quote($_)} @{$index_cols});
my $from = $q->quote(@{$tbl}{qw(db tbl)}) . " FORCE INDEX(`$index`)";
# The real first row in the table. Usually we start nibbling from
# this row. Called once in _get_bounds().
@@ -230,7 +238,6 @@ sub new {
$self = {
%args,
index => $index,
limit => $limit,
first_lb_sql => $first_lb_sql,
last_ub_sql => $last_ub_sql,
@@ -249,6 +256,7 @@ sub new {
};
}
$self->{index} = $index;
$self->{row_est} = $row_est;
$self->{nibbleno} = 0;
$self->{have_rows} = 0;