chore: Setup code skeleton of datanode

src/query/src/executor.rs

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+

src/query/src/lib.rs

@@ -1 +1,4 @@
-
+mod executor;
+mod logical_optimizer;
+mod physical_optimizer;
+mod physical_planner;

src/query/src/logical_optimizer.rs

@@ -0,0 +1 @@
+

src/query/src/physical_optimizer.rs

@@ -0,0 +1 @@
+

src/query/src/physical_planner.rs

@@ -0,0 +1 @@
+