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<div id=Content><div class="CClass"><div class=CTopic id=MainTopic><h1 class=CTitle><a name="pt_table_sync"></a>pt_table_sync</h1><div class=CBody><!--START_ND_SUMMARY--><div class=Summary><div class=STitle>Summary</div><div class=SBorder><table border=0 cellspacing=0 cellpadding=0 class=STable><tr class="SMain"><td class=SEntry><a href="#pt_table_sync" >pt_table_sync</a></td><td class=SDescription></td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#pt_table_sync.Variables" >Variables</a></td><td class=SDescription></td></tr><tr class="SVariable SIndent2 SMarked"><td class=SEntry><a href="#pt_table_sync.dsn_for" id=link1 onMouseOver="ShowTip(event, 'tt1', 'link1')" onMouseOut="HideTip('tt1')">%dsn_for</a></td><td class=SDescription></td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#pt_table_sync.Functions" >Functions</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#pt_table_sync.main" id=link2 onMouseOver="ShowTip(event, 'tt2', 'link2')" onMouseOut="HideTip('tt2')">main</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#pt_table_sync.lock_and_rename" id=link3 onMouseOver="ShowTip(event, 'tt3', 'link3')" onMouseOut="HideTip('tt3')">lock_and_rename</a></td><td class=SDescription>Lock and rename a table.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#pt_table_sync.sync_one_table" id=link4 onMouseOver="ShowTip(event, 'tt4', 'link4')" onMouseOut="HideTip('tt4')">sync_one_table</a></td><td class=SDescription>Sync one table between one source host and multiple destination hosts. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#pt_table_sync.sync_via_replication" id=link5 onMouseOver="ShowTip(event, 'tt5', 'link5')" onMouseOut="HideTip('tt5')">sync_via_replication</a></td><td class=SDescription>Sync multiple destination hosts to one source host via replication. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#pt_table_sync.sync_all" id=link6 onMouseOver="ShowTip(event, 'tt6', 'link6')" onMouseOut="HideTip('tt6')">sync_all</a></td><td class=SDescription>Sync every table between one source host and multiple destination hosts. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#pt_table_sync.lock_server" id=link7 onMouseOver="ShowTip(event, 'tt7', 'link7')" onMouseOut="HideTip('tt7')">lock_server</a></td><td class=SDescription>Lock a host with FLUSH TABLES WITH READ LOCK. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#pt_table_sync.unlock_server" id=link8 onMouseOver="ShowTip(event, 'tt8', 'link8')" onMouseOut="HideTip('tt8')">unlock_server</a></td><td class=SDescription>Unlock a host with UNLOCK TABLES. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#pt_table_sync.sync_a_table" id=link9 onMouseOver="ShowTip(event, 'tt9', 'link9')" onMouseOut="HideTip('tt9')">sync_a_table</a></td><td class=SDescription>Sync the destination host table to the source host table. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#pt_table_sync.get_change_dbh" id=link10 onMouseOver="ShowTip(event, 'tt10', 'link10')" onMouseOut="HideTip('tt10')">get_change_dbh</a></td><td class=SDescription>Return the dbh to write to for syncing changes. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#pt_table_sync.make_action_subs" id=link11 onMouseOver="ShowTip(event, 'tt11', 'link11')" onMouseOut="HideTip('tt11')">make_action_subs</a></td><td class=SDescription>Make callbacks for <a href="../modules/ChangeHandler-pm.html#ChangeHandler.new" class=LFunction id=link12 onMouseOver="ShowTip(event, 'tt12', 'link12')" onMouseOut="HideTip('tt12')">ChangeHandler::new()</a> actions argument. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#pt_table_sync.print_err" >print_err</a></td><td class=SDescription>Try to extract the MySQL error message and print it.</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#pt_table_sync.get_cxn" >get_cxn</a></td><td class=SDescription>Connect to host specified by DSN.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#pt_table_sync.ok_to_sync" >ok_to_sync</a></td><td class=SDescription>Check that the destination host table can be synced to the source host table. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#pt_table_sync.filter_diffs" >filter_diffs</a></td><td class=SDescription>Filter different slave tables according to the various schema object filters. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#pt_table_sync.disconnect" >disconnect</a></td><td class=SDescription>Disconnect host dbhs created by <a href="#pt_table_sync.get_cxn" class=LFunction id=link13 onMouseOver="ShowTip(event, 'tt13', 'link13')" onMouseOut="HideTip('tt13')">get_cxn()</a>. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#pt_table_sync.print_sql" >print_sql</a></td><td class=SDescription>Callback for <a href="../modules/TableSyncer-pm.html#TableSyncer.sync_table" class=LFunction id=link14 onMouseOver="ShowTip(event, 'tt14', 'link14')" onMouseOut="HideTip('tt14')">TableSyncer::sync_table()</a> if --print --verbose --verbose is specified. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#pt_table_sync.cmd_conflict_col" >cmd_conflict_col</a></td><td class=SDescription>Compare --conflict-column values for --bidirectional. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#pt_table_sync.set_bidirectional_callbacks" >set_bidirectional_callbacks</a></td><td class=SDescription>Set syncer plugin callbacks for --bidirectional.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#pt_table_sync.get_plugins" >get_plugins</a></td><td class=SDescription>Get internal TableSync* plugins.</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#pt_table_sync.get_server_time" >get_server_time</a></td><td class=SDescription>Return HH:MM:SS of SELECT NOW() from the server.</td></tr></table></div></div><!--END_ND_SUMMARY--></div></div></div>
<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.Variables"></a>Variables</h3></div></div>
<div class="CVariable"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.dsn_for"></a>%dsn_for</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">my %dsn_for</td></tr></table></blockquote></div></div></div>
<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.Functions"></a>Functions</h3></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.main"></a>main</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub main</td></tr></table></blockquote></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.lock_and_rename"></a>lock_and_rename</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub lock_and_rename</td></tr></table></blockquote><p>Lock and rename a table.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>%args</td><td class=CDLDescription>Arguments</td></tr></table><h4 class=CHeading>Required Arguments</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>dsns</td><td class=CDLDescription>Arrayref of DSNs</td></tr><tr><td class=CDLEntry>plugins</td><td class=CDLDescription>Arrayref of TableSync* objects</td></tr><tr><td class=CDLEntry>OptionParser</td><td class=CDLDescription><a href="../modules/OptionParser-pm.html#OptionParser" class=LClass id=link15 onMouseOver="ShowTip(event, 'tt15', 'link15')" onMouseOut="HideTip('tt15')">OptionParser</a> object</td></tr><tr><td class=CDLEntry>DSNParser</td><td class=CDLDescription><a href="../modules/DSNParser-pm.html#DSNParser" class=LClass id=link16 onMouseOver="ShowTip(event, 'tt16', 'link16')" onMouseOut="HideTip('tt16')">DSNParser</a> object</td></tr><tr><td class=CDLEntry>Quoter</td><td class=CDLDescription><a href="../modules/Quoter-pm.html#Quoter" class=LClass id=link17 onMouseOver="ShowTip(event, 'tt17', 'link17')" onMouseOut="HideTip('tt17')">Quoter</a> object</td></tr></table><h4 class=CHeading>Returns</h4><p>Exit status</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.sync_one_table"></a>sync_one_table</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub sync_one_table</td></tr></table></blockquote><p>Sync one table between one source host and multiple destination hosts.&nbsp; The first DSN in $args{dsns} specifies the source host, database (D), and table (t).&nbsp; The other DSNs are the destination hosts.&nbsp; If a destination DSN does not specify a database or table, the source database or table are used as defaults.&nbsp; Else, the destination-specific database or table are used.&nbsp; This allows you to sync tables with different names.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>%args</td><td class=CDLDescription>Arguments</td></tr></table><h4 class=CHeading>Required Arguments</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>dsns</td><td class=CDLDescription>Arrayref of DSNs</td></tr><tr><td class=CDLEntry>plugins</td><td class=CDLDescription>Arrayref of TableSync* objects</td></tr><tr><td class=CDLEntry>OptionParser</td><td class=CDLDescription><a href="../modules/OptionParser-pm.html#OptionParser" class=LClass id=link18 onMouseOver="ShowTip(event, 'tt15', 'link18')" onMouseOut="HideTip('tt15')">OptionParser</a> object</td></tr><tr><td class=CDLEntry>DSNParser</td><td class=CDLDescription><a href="../modules/DSNParser-pm.html#DSNParser" class=LClass id=link19 onMouseOver="ShowTip(event, 'tt16', 'link19')" onMouseOut="HideTip('tt16')">DSNParser</a> object</td></tr><tr><td class=CDLEntry>Quoter</td><td class=CDLDescription><a href="../modules/Quoter-pm.html#Quoter" class=LClass id=link20 onMouseOver="ShowTip(event, 'tt17', 'link20')" onMouseOut="HideTip('tt17')">Quoter</a> object</td></tr><tr><td class=CDLEntry>VersionParser</td><td class=CDLDescription><a href="../modules/VersionParser-pm.html#VersionParser" class=LClass id=link21 onMouseOver="ShowTip(event, 'tt18', 'link21')" onMouseOut="HideTip('tt18')">VersionParser</a> object</td></tr></table><h4 class=CHeading>Returns</h4><p>Exit status</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.sync_via_replication"></a>sync_via_replication</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub sync_via_replication</td></tr></table></blockquote><p>Sync multiple destination hosts to one source host via replication.&nbsp; The first DSN in $args{dsns} specifies the source host.&nbsp; If --sync-to-master is specified, then the source host is a master and there is only one destination host which is its slave.&nbsp; Else, destination hosts are auto-discovered with <a href="../modules/MasterSlave-pm.html#MasterSlave.recurse_to_slaves" class=LFunction id=link22 onMouseOver="ShowTip(event, 'tt19', 'link22')" onMouseOut="HideTip('tt19')">MasterSlave::recurse_to_slaves()</a>.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>%args</td><td class=CDLDescription>Arguments</td></tr></table><h4 class=CHeading>Required Arguments</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>dsns</td><td class=CDLDescription>Arrayref of DSNs</td></tr><tr><td class=CDLEntry>plugins</td><td class=CDLDescription>Arrayref of TableSync* objects</td></tr><tr><td class=CDLEntry>OptionParser</td><td class=CDLDescription><a href="../modules/OptionParser-pm.html#OptionParser" class=LClass id=link23 onMouseOver="ShowTip(event, 'tt15', 'link23')" onMouseOut="HideTip('tt15')">OptionParser</a> object</td></tr><tr><td class=CDLEntry>DSNParser</td><td class=CDLDescription><a href="../modules/DSNParser-pm.html#DSNParser" class=LClass id=link24 onMouseOver="ShowTip(event, 'tt16', 'link24')" onMouseOut="HideTip('tt16')">DSNParser</a> object</td></tr><tr><td class=CDLEntry>Quoter</td><td class=CDLDescription><a href="../modules/Quoter-pm.html#Quoter" class=LClass id=link25 onMouseOver="ShowTip(event, 'tt17', 'link25')" onMouseOut="HideTip('tt17')">Quoter</a> object</td></tr><tr><td class=CDLEntry>VersionParser</td><td class=CDLDescription><a href="../modules/VersionParser-pm.html#VersionParser" class=LClass id=link26 onMouseOver="ShowTip(event, 'tt18', 'link26')" onMouseOut="HideTip('tt18')">VersionParser</a> object</td></tr><tr><td class=CDLEntry>TableChecksum</td><td class=CDLDescription><a href="../modules/TableChecksum-pm.html#TableChecksum" class=LClass id=link27 onMouseOver="ShowTip(event, 'tt20', 'link27')" onMouseOut="HideTip('tt20')">TableChecksum</a> object</td></tr><tr><td class=CDLEntry>MasterSlave</td><td class=CDLDescription><a href="../modules/MasterSlave-pm.html#MasterSlave" class=LClass id=link28 onMouseOver="ShowTip(event, 'tt21', 'link28')" onMouseOut="HideTip('tt21')">MasterSlave</a> object</td></tr></table><h4 class=CHeading>Returns</h4><p>Exit status</p><h4 class=CHeading>See Also</h4><p><a href="#pt_table_sync.filter_diffs" class=LFunction id=link29 onMouseOver="ShowTip(event, 'tt22', 'link29')" onMouseOut="HideTip('tt22')">filter_diffs()</a></p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.sync_all"></a>sync_all</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub sync_all</td></tr></table></blockquote><p>Sync every table between one source host and multiple destination hosts.&nbsp; The first DSN in $args{dsns} specifies the source host.&nbsp; The other DSNs are the destination hosts.&nbsp; Unlike <a href="#pt_table_sync.sync_one_table" class=LFunction id=link30 onMouseOver="ShowTip(event, 'tt4', 'link30')" onMouseOut="HideTip('tt4')">sync_one_table</a>, the database and table names must be the same on the source and destination hosts.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>%args</td><td class=CDLDescription>Arguments</td></tr></table><h4 class=CHeading>Required Arguments</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>dsns</td><td class=CDLDescription>Arrayref of DSNs</td></tr><tr><td class=CDLEntry>plugins</td><td class=CDLDescription>Arrayref of TableSync* objects</td></tr><tr><td class=CDLEntry>OptionParser</td><td class=CDLDescription><a href="../modules/OptionParser-pm.html#OptionParser" class=LClass id=link31 onMouseOver="ShowTip(event, 'tt15', 'link31')" onMouseOut="HideTip('tt15')">OptionParser</a> object</td></tr><tr><td class=CDLEntry>DSNParser</td><td class=CDLDescription><a href="../modules/DSNParser-pm.html#DSNParser" class=LClass id=link32 onMouseOver="ShowTip(event, 'tt16', 'link32')" onMouseOut="HideTip('tt16')">DSNParser</a> object</td></tr><tr><td class=CDLEntry>Quoter</td><td class=CDLDescription><a href="../modules/Quoter-pm.html#Quoter" class=LClass id=link33 onMouseOver="ShowTip(event, 'tt17', 'link33')" onMouseOut="HideTip('tt17')">Quoter</a> object</td></tr><tr><td class=CDLEntry>VersionParser</td><td class=CDLDescription><a href="../modules/VersionParser-pm.html#VersionParser" class=LClass id=link34 onMouseOver="ShowTip(event, 'tt18', 'link34')" onMouseOut="HideTip('tt18')">VersionParser</a> object</td></tr><tr><td class=CDLEntry>TableParser</td><td class=CDLDescription><a href="../modules/TableParser-pm.html#TableParser" class=LClass id=link35 onMouseOver="ShowTip(event, 'tt23', 'link35')" onMouseOut="HideTip('tt23')">TableParser</a> object</td></tr><tr><td class=CDLEntry>MySQLDump</td><td class=CDLDescription><a href="../modules/MySQLDump-pm.html#MySQLDump" class=LClass id=link36 onMouseOver="ShowTip(event, 'tt24', 'link36')" onMouseOut="HideTip('tt24')">MySQLDump</a> object</td></tr></table><h4 class=CHeading>Returns</h4><p>Exit status</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.lock_server"></a>lock_server</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub lock_server</td></tr></table></blockquote><p>Lock a host with FLUSH TABLES WITH READ LOCK.&nbsp; This implements --lock 3 by calling <a href="../modules/TableSyncer-pm.html#TableSyncer.lock_and_wait" class=LFunction id=link37 onMouseOver="ShowTip(event, 'tt25', 'link37')" onMouseOut="HideTip('tt25')">TableSyncer::lock_and_wait()</a>.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>%args</td><td class=CDLDescription>Arguments</td></tr></table><h4 class=CHeading>Required Arguments</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>src</td><td class=CDLDescription>Hashref with source host information</td></tr><tr><td class=CDLEntry>dst</td><td class=CDLDescription>Hashref with destination host information</td></tr><tr><td class=CDLEntry>OptionParser</td><td class=CDLDescription><a href="../modules/OptionParser-pm.html#OptionParser" class=LClass id=link38 onMouseOver="ShowTip(event, 'tt15', 'link38')" onMouseOut="HideTip('tt15')">OptionParser</a> object</td></tr><tr><td class=CDLEntry>DSNParser</td><td class=CDLDescription><a href="../modules/DSNParser-pm.html#DSNParser" class=LClass id=link39 onMouseOver="ShowTip(event, 'tt16', 'link39')" onMouseOut="HideTip('tt16')">DSNParser</a> object</td></tr><tr><td class=CDLEntry>TableSyncer</td><td class=CDLDescription><a href="../modules/TableSyncer-pm.html#TableSyncer" class=LClass id=link40 onMouseOver="ShowTip(event, 'tt26', 'link40')" onMouseOut="HideTip('tt26')">TableSyncer</a> object</td></tr></table></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.unlock_server"></a>unlock_server</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub unlock_server</td></tr></table></blockquote><p>Unlock a host with UNLOCK TABLES.&nbsp; This implements --lock 3 by calling <a href="../modules/TableSyncer-pm.html#TableSyncer.unlock" class=LFunction id=link41 onMouseOver="ShowTip(event, 'tt27', 'link41')" onMouseOut="HideTip('tt27')">TableSyncer::unlock()</a>.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>%args</td><td class=CDLDescription>Arguments</td></tr></table><h4 class=CHeading>Required Arguments</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>src</td><td class=CDLDescription>Hashref with source host information</td></tr><tr><td class=CDLEntry>dst</td><td class=CDLDescription>Hashref with destination host information</td></tr><tr><td class=CDLEntry>OptionParser</td><td class=CDLDescription><a href="../modules/OptionParser-pm.html#OptionParser" class=LClass id=link42 onMouseOver="ShowTip(event, 'tt15', 'link42')" onMouseOut="HideTip('tt15')">OptionParser</a> object</td></tr><tr><td class=CDLEntry>DSNParser</td><td class=CDLDescription><a href="../modules/DSNParser-pm.html#DSNParser" class=LClass id=link43 onMouseOver="ShowTip(event, 'tt16', 'link43')" onMouseOut="HideTip('tt16')">DSNParser</a> object</td></tr><tr><td class=CDLEntry>TableSyncer</td><td class=CDLDescription><a href="../modules/TableSyncer-pm.html#TableSyncer" class=LClass id=link44 onMouseOver="ShowTip(event, 'tt26', 'link44')" onMouseOut="HideTip('tt26')">TableSyncer</a> object</td></tr></table></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.sync_a_table"></a>sync_a_table</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub sync_a_table</td></tr></table></blockquote><p>Sync the destination host table to the source host table.&nbsp; This sub is not called directly but indirectly via the other sync_* subs.&nbsp; In turn, this sub calls <a href="../modules/TableSyncer-pm.html#TableSyncer.sync_table" class=LFunction id=link45 onMouseOver="ShowTip(event, 'tt14', 'link45')" onMouseOut="HideTip('tt14')">TableSyncer::sync_table()</a> which actually does the sync work.&nbsp; Calling sync_table() requires a fair amount of prep work that this sub does/simplifies.&nbsp; New <a href="../modules/RowDiff-pm.html#RowDiff" class=LClass id=link46 onMouseOver="ShowTip(event, 'tt28', 'link46')" onMouseOut="HideTip('tt28')">RowDiff</a> and <a href="../modules/ChangeHandler-pm.html#ChangeHandler" class=LClass id=link47 onMouseOver="ShowTip(event, 'tt29', 'link47')" onMouseOut="HideTip('tt29')">ChangeHandler</a> objects are created, so those packages need to be available.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>$args</td><td class=CDLDescription>Arguments</td></tr></table><h4 class=CHeading>Required Arguments</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>src</td><td class=CDLDescription>Hashref with source host information</td></tr><tr><td class=CDLEntry>dst</td><td class=CDLDescription>Hashref with destination host information</td></tr><tr><td class=CDLEntry>plugins</td><td class=CDLDescription>Arrayref of TableSync* objects</td></tr><tr><td class=CDLEntry>OptionParser</td><td class=CDLDescription><a href="../modules/OptionParser-pm.html#OptionParser" class=LClass id=link48 onMouseOver="ShowTip(event, 'tt15', 'link48')" onMouseOut="HideTip('tt15')">OptionParser</a> object</td></tr><tr><td class=CDLEntry>Quoter</td><td class=CDLDescription><a href="../modules/Quoter-pm.html#Quoter" class=LClass id=link49 onMouseOver="ShowTip(event, 'tt17', 'link49')" onMouseOut="HideTip('tt17')">Quoter</a> object</td></tr><tr><td class=CDLEntry>TableParser</td><td class=CDLDescription><a href="../modules/TableParser-pm.html#TableParser" class=LClass id=link50 onMouseOver="ShowTip(event, 'tt23', 'link50')" onMouseOut="HideTip('tt23')">TableParser</a> object</td></tr><tr><td class=CDLEntry>MySQLDump</td><td class=CDLDescription><a href="../modules/MySQLDump-pm.html#MySQLDump" class=LClass id=link51 onMouseOver="ShowTip(event, 'tt24', 'link51')" onMouseOut="HideTip('tt24')">MySQLDump</a> object</td></tr><tr><td class=CDLEntry>TableSyncer</td><td class=CDLDescription><a href="../modules/TableSyncer-pm.html#TableSyncer" class=LClass id=link52 onMouseOver="ShowTip(event, 'tt26', 'link52')" onMouseOut="HideTip('tt26')">TableSyncer</a> object</td></tr></table><h4 class=CHeading>Returns</h4><p>Exit status</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.get_change_dbh"></a>get_change_dbh</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub get_change_dbh</td></tr></table></blockquote><p>Return the dbh to write to for syncing changes.&nbsp; Write statements are executed on the &ldquo;change dbh&rdquo;.&nbsp; If --sync-to-master or --replicate is specified, the source (master) dbh is the &ldquo;change dbh&rdquo;.&nbsp; This means changes replicate to all slaves.&nbsp; Else, the destination dbh is the change dbh.&nbsp; This is the case when two independent servers (or perhaps one table on the same server) are synced.&nbsp; This sub implements --[no]check-slave because writing to a slave is generally a bad thing.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>%args</td><td class=CDLDescription>Arguments</td></tr></table><h4 class=CHeading>Required Arguments</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>src</td><td class=CDLDescription>Hashref with source host information</td></tr><tr><td class=CDLEntry>dst</td><td class=CDLDescription>Hashref with destination host information</td></tr><tr><td class=CDLEntry>tbl_struct</td><td class=CDLDescription>Hashref returned by <a href="../modules/TableParser-pm.html#TableParser.parse" class=LFunction id=link53 onMouseOver="ShowTip(event, 'tt30', 'link53')" onMouseOut="HideTip('tt30')">TableParser::parse()</a></td></tr><tr><td class=CDLEntry>OptionParser</td><td class=CDLDescription><a href="../modules/OptionParser-pm.html#OptionParser" class=LClass id=link54 onMouseOver="ShowTip(event, 'tt15', 'link54')" onMouseOut="HideTip('tt15')">OptionParser</a> object</td></tr><tr><td class=CDLEntry>DSNParser</td><td class=CDLDescription><a href="../modules/DSNParser-pm.html#DSNParser" class=LClass id=link55 onMouseOver="ShowTip(event, 'tt16', 'link55')" onMouseOut="HideTip('tt16')">DSNParser</a> object</td></tr><tr><td class=CDLEntry>MasterSlave</td><td class=CDLDescription><a href="../modules/MasterSlave-pm.html#MasterSlave" class=LClass id=link56 onMouseOver="ShowTip(event, 'tt21', 'link56')" onMouseOut="HideTip('tt21')">MasterSlave</a> object</td></tr></table><h4 class=CHeading>Returns</h4><p>Either $args{src}-&gt;{dbh} or $args{dst}-&gt;{dbh} if no checks fail.</p><h4 class=CHeading>See Also</h4><p><a href="#pt_table_sync.make_action_subs" class=LFunction id=link57 onMouseOver="ShowTip(event, 'tt11', 'link57')" onMouseOut="HideTip('tt11')">make_action_subs()</a></p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.make_action_subs"></a>make_action_subs</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub make_action_subs</td></tr></table></blockquote><p>Make callbacks for <a href="../modules/ChangeHandler-pm.html#ChangeHandler.new" class=LFunction id=link58 onMouseOver="ShowTip(event, 'tt12', 'link58')" onMouseOut="HideTip('tt12')">ChangeHandler::new()</a> actions argument.&nbsp; This sub implements --print and --execute.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>%args</td><td class=CDLDescription>Arguments</td></tr></table><h4 class=CHeading>Required Arguments</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>change_dbh</td><td class=CDLDescription>dbh returned by <a href="#pt_table_sync.get_change_dbh" class=LFunction id=link59 onMouseOver="ShowTip(event, 'tt10', 'link59')" onMouseOut="HideTip('tt10')">get_change_dbh</a></td></tr><tr><td class=CDLEntry>OptionParser</td><td class=CDLDescription><a href="../modules/OptionParser-pm.html#OptionParser" class=LClass id=link60 onMouseOver="ShowTip(event, 'tt15', 'link60')" onMouseOut="HideTip('tt15')">OptionParser</a> object</td></tr></table><h4 class=CHeading>Returns</h4><p>Arrayref of callbacks (coderefs)</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.print_err"></a>print_err</h3><div class=CBody><p>Try to extract the MySQL error message and print it.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>$msg</td><td class=CDLDescription>Error message</td></tr><tr><td class=CDLEntry>$database</td><td class=CDLDescription>Database name being synced when error occurred</td></tr><tr><td class=CDLEntry>$table</td><td class=CDLDescription>Table name being synced when error occurred</td></tr><tr><td class=CDLEntry>$host</td><td class=CDLDescription>Host name error occurred on</td></tr></table></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.get_cxn"></a>get_cxn</h3><div class=CBody><p>Connect to host specified by DSN.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>$dsn</td><td class=CDLDescription>Host DSN</td></tr><tr><td class=CDLEntry>%args</td><td class=CDLDescription>Arguments</td></tr></table><h4 class=CHeading>Required Arguments</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>OptionaParser</td><td class=CDLDescription><a href="../modules/OptionParser-pm.html#OptionParser" class=LClass id=link61 onMouseOver="ShowTip(event, 'tt15', 'link61')" onMouseOut="HideTip('tt15')">OptionParser</a> object</td></tr><tr><td class=CDLEntry>DSNParser</td><td class=CDLDescription><a href="../modules/DSNParser-pm.html#DSNParser" class=LClass id=link62 onMouseOver="ShowTip(event, 'tt16', 'link62')" onMouseOut="HideTip('tt16')">DSNParser</a> object</td></tr></table><h4 class=CHeading>Returns</h4><p>dbh</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.ok_to_sync"></a>ok_to_sync</h3><div class=CBody><p>Check that the destination host table can be synced to the source host table.&nbsp; All sorts of sanity checks are performed to help ensure that syncing the table won&rsquo;t cause problems in <a href="#pt_table_sync.sync_a_table" class=LFunction id=link63 onMouseOver="ShowTip(event, 'tt9', 'link63')" onMouseOut="HideTip('tt9')">sync_a_table()</a> or <a href="../modules/TableSyncer-pm.html#TableSyncer.sync_table" class=LFunction id=link64 onMouseOver="ShowTip(event, 'tt14', 'link64')" onMouseOut="HideTip('tt14')">TableSyncer::sync_table()</a>.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>%args</td><td class=CDLDescription>Arguments</td></tr></table><h4 class=CHeading>Required Arguments</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>src</td><td class=CDLDescription>Hashref with source host information</td></tr><tr><td class=CDLEntry>dst</td><td class=CDLDescription>Hashref with destination host information</td></tr><tr><td class=CDLEntry>DSNParser</td><td class=CDLDescription><a href="../modules/DSNParser-pm.html#DSNParser" class=LClass id=link65 onMouseOver="ShowTip(event, 'tt16', 'link65')" onMouseOut="HideTip('tt16')">DSNParser</a> object</td></tr><tr><td class=CDLEntry>Quoter</td><td class=CDLDescription><a href="../modules/Quoter-pm.html#Quoter" class=LClass id=link66 onMouseOver="ShowTip(event, 'tt17', 'link66')" onMouseOut="HideTip('tt17')">Quoter</a> object</td></tr><tr><td class=CDLEntry>VersionParser</td><td class=CDLDescription><a href="../modules/VersionParser-pm.html#VersionParser" class=LClass id=link67 onMouseOver="ShowTip(event, 'tt18', 'link67')" onMouseOut="HideTip('tt18')">VersionParser</a> object</td></tr><tr><td class=CDLEntry>TableParser</td><td class=CDLDescription><a href="../modules/TableParser-pm.html#TableParser" class=LClass id=link68 onMouseOver="ShowTip(event, 'tt23', 'link68')" onMouseOut="HideTip('tt23')">TableParser</a> object</td></tr><tr><td class=CDLEntry>MySQLDump</td><td class=CDLDescription><a href="../modules/MySQLDump-pm.html#MySQLDump" class=LClass id=link69 onMouseOver="ShowTip(event, 'tt24', 'link69')" onMouseOut="HideTip('tt24')">MySQLDump</a> object</td></tr><tr><td class=CDLEntry>TableSyncer</td><td class=CDLDescription><a href="../modules/TableSyncer-pm.html#TableSyncer" class=LClass id=link70 onMouseOver="ShowTip(event, 'tt26', 'link70')" onMouseOut="HideTip('tt26')">TableSyncer</a> object</td></tr><tr><td class=CDLEntry>OptionParser</td><td class=CDLDescription><a href="../modules/OptionParser-pm.html#OptionParser" class=LClass id=link71 onMouseOver="ShowTip(event, 'tt15', 'link71')" onMouseOut="HideTip('tt15')">OptionParser</a> object</td></tr></table><h4 class=CHeading>Returns</h4><p>Table structure (from <a href="../modules/TableParser-pm.html#TableParser.parse" class=LFunction id=link72 onMouseOver="ShowTip(event, 'tt30', 'link72')" onMouseOut="HideTip('tt30')">TableParser::parse()</a>) if ok to sync, else it dies.</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.filter_diffs"></a>filter_diffs</h3><div class=CBody><p>Filter different slave tables according to the various schema object filters.&nbsp; This sub is called in <a href="#pt_table_sync.sync_via_replication" class=LFunction id=link73 onMouseOver="ShowTip(event, 'tt5', 'link73')" onMouseOut="HideTip('tt5')">sync_via_replication()</a> to implement schema object filters like --databases and --tables.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>$skip_table</td><td class=CDLDescription>Hashref of databases and tables to skip</td></tr><tr><td class=CDLEntry>$databases</td><td class=CDLDescription>Hashref of databases to skip</td></tr><tr><td class=CDLEntry>$tables</td><td class=CDLDescription>Hashref of tables to skip</td></tr><tr><td class=CDLEntry>@diffs</td><td class=CDLDescription>Array of hashrefs, one for each different slave table</td></tr></table><h4 class=CHeading>Returns</h4><p>Array of different slave tables that pass the filters</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.disconnect"></a>disconnect</h3><div class=CBody><p>Disconnect host dbhs created by <a href="#pt_table_sync.get_cxn" class=LFunction id=link74 onMouseOver="ShowTip(event, 'tt13', 'link74')" onMouseOut="HideTip('tt13')">get_cxn()</a>.&nbsp; To make sure all dbh are closed, pt-table-sync keeps track of the dbh it opens and this sub helps keep track of the dbh that are closed.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>@hosts</td><td class=CDLDescription>Array of hashrefs with host information, one for each host</td></tr></table></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.print_sql"></a>print_sql</h3><div class=CBody><p>Callback for <a href="../modules/TableSyncer-pm.html#TableSyncer.sync_table" class=LFunction id=link75 onMouseOver="ShowTip(event, 'tt14', 'link75')" onMouseOut="HideTip('tt14')">TableSyncer::sync_table()</a> if --print --verbose --verbose is specified.&nbsp; The callback simply prints the SQL statements passed to it by sync_table().&nbsp; They&rsquo;re usually (always?) identical statements.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>$src_sql</td><td class=CDLDescription>SQL statement to be executed on the sourch host</td></tr><tr><td class=CDLEntry>$dst_sql</td><td class=CDLDescription>SQL statement to be executed on the destination host</td></tr></table></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.cmd_conflict_col"></a>cmd_conflict_col</h3><div class=CBody><p>Compare --conflict-column values for --bidirectional.&nbsp; This sub is used as a callback in <a href="#pt_table_sync.set_bidirectional_callbacks" class=LFunction id=link76 onMouseOver="ShowTip(event, 'tt31', 'link76')" onMouseOut="HideTip('tt31')">set_bidirectional_callbacks()</a>.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>$left_val</td><td class=CDLDescription>Column value from left (usually the source host)</td></tr><tr><td class=CDLEntry>$right_val</td><td class=CDLDescription>Column value from right (usually the destination host)</td></tr><tr><td class=CDLEntry>$cmp</td><td class=CDLDescription>Type of conflict comparison, --conflict-comparison</td></tr><tr><td class=CDLEntry>$val</td><td class=CDLDescription>Value for certain types of comparisons, --conflict-value</td></tr><tr><td class=CDLEntry>$thr</td><td class=CDLDescription>Threshold for certain types of comparisons, --conflict-threshold</td></tr></table><h4 class=CHeading>Returns</h4><p>One of the constants above, UPDATE_* or FAILED_THRESHOLD</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.set_bidirectional_callbacks"></a>set_bidirectional_callbacks</h3><div class=CBody><p>Set syncer plugin callbacks for --bidirectional.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>%args</td><td class=CDLDescription>Arguments</td></tr></table><h4 class=CHeading>Required Arguments</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>plugin</td><td class=CDLDescription>TableSync* object</td></tr><tr><td class=CDLEntry>OptionParser</td><td class=CDLDescription><a href="../modules/OptionParser-pm.html#OptionParser" class=LClass id=link77 onMouseOver="ShowTip(event, 'tt15', 'link77')" onMouseOut="HideTip('tt15')">OptionParser</a> object</td></tr></table></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.get_plugins"></a>get_plugins</h3><div class=CBody><p>Get internal TableSync* plugins.</p><h4 class=CHeading>Returns</h4><p>Hash of available algoritms and the plugin/module names that implement them, like &ldquo;chunk =&gt; TableSyncChunk&rdquo;.</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="pt_table_sync.get_server_time"></a>get_server_time</h3><div class=CBody><p>Return HH:MM:SS of SELECT NOW() from the server.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>$dbh</td><td class=CDLDescription>dbh</td></tr></table></div></div></div>
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<div class=CToolTip id="tt1"><div class=CVariable><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">my %dsn_for</td></tr></table></blockquote></div></div><div class=CToolTip id="tt2"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub main</td></tr></table></blockquote></div></div><div class=CToolTip id="tt3"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub lock_and_rename</td></tr></table></blockquote>Lock and rename a table.</div></div><div class=CToolTip id="tt4"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub sync_one_table</td></tr></table></blockquote>Sync one table between one source host and multiple destination hosts. </div></div><div class=CToolTip id="tt5"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub sync_via_replication</td></tr></table></blockquote>Sync multiple destination hosts to one source host via replication. </div></div><div class=CToolTip id="tt6"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub sync_all</td></tr></table></blockquote>Sync every table between one source host and multiple destination hosts. </div></div><div class=CToolTip id="tt7"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub lock_server</td></tr></table></blockquote>Lock a host with FLUSH TABLES WITH READ LOCK. </div></div><div class=CToolTip id="tt8"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub unlock_server</td></tr></table></blockquote>Unlock a host with UNLOCK TABLES. </div></div><div class=CToolTip id="tt9"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub sync_a_table</td></tr></table></blockquote>Sync the destination host table to the source host table. </div></div><div class=CToolTip id="tt10"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub get_change_dbh</td></tr></table></blockquote>Return the dbh to write to for syncing changes. </div></div><div class=CToolTip id="tt11"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub make_action_subs</td></tr></table></blockquote>Make callbacks for ChangeHandler::new() actions argument. </div></div><div class=CToolTip id="tt12"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub new</td></tr></table></blockquote></div></div><div class=CToolTip id="tt13"><div class=CFunction>Connect to host specified by DSN.</div></div><div class=CToolTip id="tt14"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub sync_table</td></tr></table></blockquote></div></div><div class=CToolTip id="tt15"><div class=CClass>OptionParser parses command line options from a tool&rsquo;s POD. </div></div><div class=CToolTip id="tt16"><div class=CClass>DSNParser parses DSNs and creates connections to MySQL using DBI and DBD::mysql.</div></div><div class=CToolTip id="tt17"><div class=CClass>Quoter handles value quoting, unquoting, escaping, etc.</div></div><div class=CToolTip id="tt18"><div class=CClass>VersionParser parses a MySQL version string.</div></div><div class=CToolTip id="tt19"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub recurse_to_slaves</td></tr></table></blockquote>Descend to slaves by examining SHOW SLAVE HOSTS. </div></div><div class=CToolTip id="tt20"><div class=CClass>TableChecksum checksums tables.</div></div><div class=CToolTip id="tt21"><div class=CClass>MasterSlave handles common tasks related to master-slave setups.</div></div><div class=CToolTip id="tt22"><div class=CFunction>Filter different slave tables according to the various schema object filters. </div></div><div class=CToolTip id="tt23"><div class=CClass>TableParser parses SHOW CREATE TABLE.</div></div><div class=CToolTip id="tt24"><div class=CClass>MySQLDump gets CREATE TABLE defs from MySQL.</div></div><div class=CToolTip id="tt25"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">sub lock_and_wait</td></tr></table></blockquote></div></div><div class=CToolTip id="tt26"><div class=CClass>TableSyncer helps sync tables with various table sync algo 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