Query parser 3.0 (#23)

* Starting query parsing

* Query parser

* working config

* disable by default

* fix tsets

* introducing log crate; test for query router; comments

* typo

* fixes for banning

* added test for prepared stmt

Cargo.lock

@@ -322,6 +322,7 @@ dependencies = [
  "bb8",
  "bytes",
  "chrono",
+ "log",
  "md-5",
  "num_cpus",
  "once_cell",
@@ -330,6 +331,7 @@ dependencies = [
  "serde",
  "serde_derive",
  "sha-1",
+ "sqlparser",
  "statsd",
  "tokio",
  "toml",
@@ -492,6 +494,15 @@ version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2dd574626839106c320a323308629dcb1acfc96e32a8cba364ddc61ac23ee83"
 
+[[package]]
+name = "sqlparser"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8f192f29f4aa49e57bebd0aa05858e0a1f32dd270af36efe49edb82cbfffab6"
+dependencies = [
+ "log",
+]
+
 [[package]]
 name = "statsd"
 version = "0.15.0"