DirectQueryProcedure
toRecognizedQuery
sql
buildLogicalPlan
数据源元数据抽取
createSpecificJdbcConnection
chooseAdaptPipeline
build connection(avatica jetty server)
createSpecificProcedure
Jdbc连接
tables and schema
Jdbc client(avatica)
SubtreeSyncopator
conn rpc
statement.executeQuery();
optimizeLogicalPlan
Collect
JdbcPipeline
LogicalViewShuttle
解析出tables
