CnServerMessageHandler receive and deal the message from cn-client.

DebugShowScopes show information of a scope structure.

NewCompile is used to new an object of compile.

NewSQLExecutor returns a internal used sql service.

type of scope.

type of scope.

type of scope.

type of scope.

type of scope.

type of scope.

type of scope.

type of scope.

Note: Now the cost going from stat is actually the number of rows, so we can only estimate a number for the size of each row.

type of scope.

type of scope.

type of scope.

type of scope.

HandleNotifyTimeout todo: this is a bad design here.

MaxRpcTime is a default timeout time to rpc context if user never set this deadline.

type of scope.

type of scope.

type of scope.

type of scope.

type of scope.

type of scope.

type of scope.

Note: Now the cost going from stat is actually the number of rows, so we can only estimate a number for the size of each row.

type of scope.

Col is the information of attribute.

Compile contains all the information needed for compilation.

Scope is the output of the compile process.

ServiceOfCompile is used to manage the lifecycle of Compile structures, including their creation and deletion.

Source contains information of a relation which will be used in execution.