Update config.go

[dacker-soul]

Fix dump config ignore tables format

[dacker-soul]

canal/canal.go:162-166行

        for _, ignoreTable := range c.cfg.Dump.IgnoreTables {
		if seps := strings.Split(ignoreTable, ","); len(seps) == 2 {
			c.dumper.AddIgnoreTables(seps[0], seps[1])
		}
	}

忽略的表（ignoreTable），用逗号分隔 DB和table，这里好奇怪，不知道为什么，但是
canal/.go:25-26行

       // Ignore table format is db.table
	IgnoreTables []string `toml:"ignore_tables"`

要求用” . “来间隔。

[luispater]

这里原先应该就是正确的吧？
database1.table1,database2.table2，逗号是用来分割不同的表，句点是用sql语法将database和table做分割吧？

[dacker-soul]

这里原先应该就是正确的吧？
database1.table1，database2.table2，逗号是用来分割不同的表，句点是用SQL语法将数据库和表做分割吧？

    for _, ignoreTable := range c.cfg.Dump.IgnoreTables {
	if seps := strings.Split(ignoreTable, ","); len(seps) == 2 {
		c.dumper.AddIgnoreTables(seps[0], seps[1])
	}
}

seps[0]是DB，seps[1]是table
根据 strings.Split(ignoreTable, ",")源代码来看，他们是通过 “,”来链接的

而注释
// Ignore table format is db.table
IgnoreTables []string toml:"ignore_tables"

要求用“.”来连接，所以自相矛盾啊

[dveeden]

@lance6716 could you check this PR?

[lance6716]

The old comment are not aligned with code. However, I think the problems are

• Code behaviour is a bit weird. It's more common to use db.table rather than db,table
• But we don't dare to change it, because maybe some applications already depends on the behaviour 😂
• It does not consider database name or table name which contains . (currently contains ,)

I just have no strong ideas about fixing them. Maybe we can change the field name and toml name of

IgnoreTables []string `toml:"ignore_tables"`

to avoid application silently fails after the fix, and choose a better syntax