Debezium series: support the use of variables in the Kill Command

One 、mysql kill command

• KILL [CONNECTION | QUERY] processlist_id
• And mysqld Each connection of runs in a separate thread . You can use KILL processlist_id Statement kills the thread .

Two 、MySqlParser.g4

debezium-ddl-parser/src/main/antlr4/io/debezium/ddl/parser/mysql/generated/MySqlParser.g4

killStatement
    : KILL connectionFormat=(CONNECTION | QUERY)?
-      decimalLiteral+
+