Started on md5 auth.

Left to figure out:
Whats the right format to store user:pw in userlist?
hashmap errors?
actually do hash:x comparison

.circleci/run_tests.sh

@@ -13,9 +13,6 @@ function start_pgcat() {
 
 # Setup the database with shards and user
 psql -e -h 127.0.0.1 -p 5432 -U postgres -f tests/sharding/query_routing_setup.sql
-PGPASSWORD=sharding_user pgbench -h 127.0.0.1 -U sharding_user shard0 -i
-PGPASSWORD=sharding_user pgbench -h 127.0.0.1 -U sharding_user shard1 -i
-PGPASSWORD=sharding_user pgbench -h 127.0.0.1 -U sharding_user shard2 -i
 
 # Install Toxiproxy to simulate a downed/slow database
 wget -O toxiproxy-2.1.4.deb https://github.com/Shopify/toxiproxy/releases/download/v2.1.4/toxiproxy_2.1.4_amd64.deb
@@ -31,9 +28,9 @@ toxiproxy-cli create -l 127.0.0.1:5433 -u 127.0.0.1:5432 postgres_replica
 start_pgcat "info"
 
 # pgbench test
-pgbench -i -h 127.0.0.1 -p 6432
+pgbench -i -h 127.0.0.1 -p 6432 && \
-pgbench -h 127.0.0.1 -p 6432 -t 500 -c 2 --protocol simple -f tests/pgbench/simple.sql
+    pgbench -h 127.0.0.1 -p 6432 -t 500 -c 2 --protocol simple && \
-pgbench -h 127.0.0.1 -p 6432 -t 500 -c 2 --protocol extended
+    pgbench -h 127.0.0.1 -p 6432 -t 500 -c 2 --protocol extended
 
 # COPY TO STDOUT test
 psql -h 127.0.0.1 -p 6432 -c 'COPY (SELECT * FROM pgbench_accounts LIMIT 15) TO STDOUT;' > /dev/null

.gitignore

@@ -1,2 +1,5 @@
 /target
 *.deb
+.idea/*
+tests/ruby/.bundle/*
+tests/ruby/vendor/*

Cargo.lock

@@ -220,6 +220,12 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1aab8fc367588b89dcee83ab0fd66b72b50b72fa1904d7095045ace2b0c81c35"
+
 [[package]]
 name = "libc"
 version = "0.2.117"
@@ -369,8 +375,10 @@ dependencies = [
  "regex",
  "serde",
  "serde_derive",
+ "serde_json",
  "sha-1",
  "sqlparser",
+ "statsd",
  "tokio",
  "toml",
 ]
@@ -477,6 +485,12 @@ version = "0.6.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
 
+[[package]]
+name = "ryu"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73b4b750c782965c211b42f022f59af1fbceabdd026623714f104152f1ec149f"
+
 [[package]]
 name = "scopeguard"
 version = "1.1.0"
@@ -500,6 +514,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "serde_json"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e8d9fa5c3b304765ce1fd9c4c8a3de2c8db365a5b91be52f186efc675681d95"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "sha-1"
 version = "0.10.0"
@@ -541,6 +566,15 @@ dependencies = [
  "log",
 ]
 
+[[package]]
+name = "statsd"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df1efceb4bf2c0b5ebec94354285a43bbbed1375605bdf2ebe4132299434a330"
+dependencies = [
+ "rand",
+]
+
 [[package]]
 name = "syn"
 version = "1.0.86"

Cargo.toml

@@ -17,9 +17,11 @@ sha-1 = "0.10"
 toml = "0.5"
 serde = "1"
 serde_derive = "1"
+serde_json = "1"
 regex = "1"
 num_cpus = "1"
 once_cell = "1"
+statsd = "0.15"
 sqlparser = "0.14"
 log = "0.4"
 arc-swap = "1"

pgcat.toml

@@ -48,8 +48,8 @@ password = "sharding_user"
 
 # [ host, port, role ]
 servers = [
-    [ "127.0.0.1", 5432, "primary" ],
+    ["127.0.0.1", 5432, "primary"],
-    [ "localhost", 5432, "replica" ],
+    ["localhost", 5432, "replica"],
     # [ "127.0.1.1", 5432, "replica" ],
 ]
 # Database name (e.g. "postgres")
@@ -58,8 +58,8 @@ database = "shard0"
 [shards.1]
 # [ host, port, role ]
 servers = [
-    [ "127.0.0.1", 5432, "primary" ],
+    ["127.0.0.1", 5432, "primary"],
-    [ "localhost", 5432, "replica" ],
+    ["localhost", 5432, "replica"],
     # [ "127.0.1.1", 5432, "replica" ],
 ]
 database = "shard1"
@@ -67,8 +67,8 @@ database = "shard1"
 [shards.2]
 # [ host, port, role ]
 servers = [
-    [ "127.0.0.1", 5432, "primary" ],
+    ["127.0.0.1", 5432, "primary"],
-    [ "localhost", 5432, "replica" ],
+    ["localhost", 5432, "replica"],
     # [ "127.0.1.1", 5432, "replica" ],
 ]
 database = "shard2"

src/admin.rs

@@ -31,7 +31,7 @@ pub async fn handle_admin(
 
     if query.starts_with("SHOW STATS") {
         trace!("SHOW STATS");
-        show_stats(stream, &pool).await
+        show_stats(stream).await
     } else if query.starts_with("RELOAD") {
         trace!("RELOAD");
         reload(stream).await
@@ -77,19 +77,11 @@ async fn show_lists(stream: &mut OwnedWriteHalf, pool: &ConnectionPool) -> Resul
     ])); // but admin tools that work with pgbouncer want this
     res.put(data_row(&vec![
         "free_clients".to_string(),
-        stats
+        stats["cl_idle"].to_string(),
-            .keys()
-            .map(|address_id| stats[&address_id]["cl_idle"])
-            .sum::<i64>()
-            .to_string(),
     ]));
     res.put(data_row(&vec![
         "used_clients".to_string(),
-        stats
+        stats["cl_active"].to_string(),
-            .keys()
-            .map(|address_id| stats[&address_id]["cl_active"])
-            .sum::<i64>()
-            .to_string(),
     ]));
     res.put(data_row(&vec![
         "login_clients".to_string(),
@@ -97,19 +89,11 @@ async fn show_lists(stream: &mut OwnedWriteHalf, pool: &ConnectionPool) -> Resul
     ]));
     res.put(data_row(&vec![
         "free_servers".to_string(),
-        stats
+        stats["sv_idle"].to_string(),
-            .keys()
-            .map(|address_id| stats[&address_id]["sv_idle"])
-            .sum::<i64>()
-            .to_string(),
     ]));
     res.put(data_row(&vec![
         "used_servers".to_string(),
-        stats
+        stats["sv_active"].to_string(),
-            .keys()
-            .map(|address_id| stats[&address_id]["sv_active"])
-            .sum::<i64>()
-            .to_string(),
     ]));
     res.put(data_row(&vec!["dns_names".to_string(), "0".to_string()]));
     res.put(data_row(&vec!["dns_zones".to_string(), "0".to_string()]));
@@ -141,7 +125,7 @@ async fn show_version(stream: &mut OwnedWriteHalf) -> Result<(), Error> {
 }
 
 /// SHOW POOLS
-async fn show_pools(stream: &mut OwnedWriteHalf, pool: &ConnectionPool) -> Result<(), Error> {
+async fn show_pools(stream: &mut OwnedWriteHalf, _pool: &ConnectionPool) -> Result<(), Error> {
     let stats = get_stats();
     let config = {
         let guard = get_config();
@@ -167,26 +151,16 @@ async fn show_pools(stream: &mut OwnedWriteHalf, pool: &ConnectionPool) -> Resul
     let mut res = BytesMut::new();
     res.put(row_description(&columns));
 
-    for shard in 0..pool.shards() {
+    let mut row = vec![String::from("all"), config.user.name.clone()];
-        for server in 0..pool.servers(shard) {
-            let address = pool.address(shard, server);
-            let stats = match stats.get(&address.id) {
-                Some(stats) => stats.clone(),
-                None => HashMap::new(),
-            };
 
-            let mut row = vec![address.name(), config.user.name.clone()];
+    for column in &columns[2..columns.len() - 1] {
-
+        let value = stats.get(column.0).unwrap_or(&0).to_string();
-            for column in &columns[2..columns.len() - 1] {
+        row.push(value);
-                let value = stats.get(column.0).unwrap_or(&0).to_string();
-                row.push(value);
-            }
-
-            row.push(config.general.pool_mode.to_string());
-            res.put(data_row(&row));
-        }
     }
 
+    row.push(config.general.pool_mode.to_string());
+
+    res.put(data_row(&row));
     res.put(command_complete("SHOW"));
 
     res.put_u8(b'Z');
@@ -335,7 +309,7 @@ async fn show_config(stream: &mut OwnedWriteHalf) -> Result<(), Error> {
 }
 
 /// SHOW STATS
-async fn show_stats(stream: &mut OwnedWriteHalf, pool: &ConnectionPool) -> Result<(), Error> {
+async fn show_stats(stream: &mut OwnedWriteHalf) -> Result<(), Error> {
     let columns = vec![
         ("database", DataType::Text),
         ("total_xact_count", DataType::Numeric),
@@ -358,24 +332,15 @@ async fn show_stats(stream: &mut OwnedWriteHalf, pool: &ConnectionPool) -> Resul
     let mut res = BytesMut::new();
     res.put(row_description(&columns));
 
-    for shard in 0..pool.shards() {
+    let mut row = vec![
-        for server in 0..pool.servers(shard) {
+        String::from("all"), // TODO: per-database stats,
-            let address = pool.address(shard, server);
+    ];
-            let stats = match stats.get(&address.id) {
-                Some(stats) => stats.clone(),
-                None => HashMap::new(),
-            };
 
-            let mut row = vec![address.name()];
+    for column in &columns[1..] {
-
+        row.push(stats.get(column.0).unwrap_or(&0).to_string());
-            for column in &columns[1..] {
-                row.push(stats.get(column.0).unwrap_or(&0).to_string());
-            }
-
-            res.put(data_row(&row));
-        }
     }
 
+    res.put(data_row(&row));
     res.put(command_complete("SHOW"));
 
     res.put_u8(b'Z');

src/client.rs

@@ -58,12 +58,6 @@ pub struct Client {
 
     // Clients want to talk to admin
     admin: bool,
-
-    // Last address the client talked to
-    last_address_id: Option<usize>,
-
-    // Last server process id we talked to
-    last_server_id: Option<i32>,
 }
 
 impl Client {
@@ -114,15 +108,18 @@ impl Client {
                 // Regular startup message.
                 PROTOCOL_VERSION_NUMBER => {
                     trace!("Got StartupMessage");
-
-                    // TODO: perform actual auth.
                     let parameters = parse_startup(bytes.clone())?;
+                    let mut user_name: String = String::new();
+                    match parameters.get(&"user") {
+                        Some(&user) => user_name = user,
+                        None => return Err(Error::ClientBadStartup),
+                    }
+                    start_auth(&mut stream, &user_name).await?;
 
                     // Generate random backend ID and secret key
                     let process_id: i32 = rand::random();
                     let secret_key: i32 = rand::random();
 
-                    auth_ok(&mut stream).await?;
                     write_all(&mut stream, server_info).await?;
                     backend_key_data(&mut stream, process_id, secret_key).await?;
                     ready_for_query(&mut stream).await?;
@@ -153,8 +150,6 @@ impl Client {
                         parameters: parameters,
                         stats: stats,
                         admin: admin,
-                        last_address_id: None,
-                        last_server_id: None,
                     });
                 }
 
@@ -177,8 +172,6 @@ impl Client {
                         parameters: HashMap::new(),
                         stats: stats,
                         admin: false,
-                        last_address_id: None,
-                        last_server_id: None,
                     });
                 }
 
@@ -229,6 +222,9 @@ impl Client {
         loop {
             trace!("Client idle, waiting for message");
 
+            // Client idle, waiting for messages.
+            self.stats.client_idle(self.process_id);
+
             // Read a complete message from the client, which normally would be
             // either a `Q` (query) or `P` (prepare, extended protocol).
             // We can parse it here before grabbing a server from the pool,
@@ -299,13 +295,13 @@ impl Client {
                 continue;
             }
 
+            // Waiting for server connection.
+            self.stats.client_waiting(self.process_id);
+
             debug!("Waiting for connection from pool");
 
             // Grab a server from the pool: the client issued a regular query.
-            let connection = match pool
+            let connection = match pool.get(query_router.shard(), query_router.role()).await {
-                .get(query_router.shard(), query_router.role(), self.process_id)
-                .await
-            {
                 Ok(conn) => {
                     debug!("Got connection from pool");
                     conn
@@ -319,23 +315,15 @@ impl Client {
             };
 
             let mut reference = connection.0;
-            let address = connection.1;
+            let _address = connection.1;
             let server = &mut *reference;
 
             // Claim this server as mine for query cancellation.
             server.claim(self.process_id, self.secret_key);
 
-            // "disconnect" from the previous server stats-wise
-            if let Some(last_address_id) = self.last_address_id {
-                self.stats
-                    .client_disconnecting(self.process_id, last_address_id);
-            }
-
             // Client active & server active
-            self.stats.client_active(self.process_id, address.id);
+            self.stats.client_active(self.process_id);
-            self.stats.server_active(server.process_id(), address.id);
+            self.stats.server_active(server.process_id());
-            self.last_address_id = Some(address.id);
-            self.last_server_id = Some(server.process_id());
 
             debug!(
                 "Client {:?} talking to server {:?}",
@@ -407,17 +395,17 @@ impl Client {
                         }
 
                         // Report query executed statistics.
-                        self.stats.query(self.process_id, address.id);
+                        self.stats.query();
 
                         // The transaction is over, we can release the connection back to the pool.
                         if !server.in_transaction() {
                             // Report transaction executed statistics.
-                            self.stats.transaction(self.process_id, address.id);
+                            self.stats.transaction();
 
                             // Release server back to the pool if we are in transaction mode.
                             // If we are in session mode, we keep the server until the client disconnects.
                             if self.transaction_mode {
-                                self.stats.server_idle(server.process_id(), address.id);
+                                self.stats.server_idle(server.process_id());
                                 break;
                             }
                         }
@@ -493,15 +481,15 @@ impl Client {
                         }
 
                         // Report query executed statistics.
-                        self.stats.query(self.process_id, address.id);
+                        self.stats.query();
 
                         // Release server back to the pool if we are in transaction mode.
                         // If we are in session mode, we keep the server until the client disconnects.
                         if !server.in_transaction() {
-                            self.stats.transaction(self.process_id, address.id);
+                            self.stats.transaction();
 
                             if self.transaction_mode {
-                                self.stats.server_idle(server.process_id(), address.id);
+                                self.stats.server_idle(server.process_id());
                                 break;
                             }
                         }
@@ -532,10 +520,10 @@ impl Client {
                         // Release server back to the pool if we are in transaction mode.
                         // If we are in session mode, we keep the server until the client disconnects.
                         if !server.in_transaction() {
-                            self.stats.transaction(self.process_id, address.id);
+                            self.stats.transaction();
 
                             if self.transaction_mode {
-                                self.stats.server_idle(server.process_id(), address.id);
+                                self.stats.server_idle(server.process_id());
                                 break;
                             }
                         }
@@ -552,7 +540,6 @@ impl Client {
             // The server is no longer bound to us, we can't cancel it's queries anymore.
             debug!("Releasing server back into the pool");
             self.release();
-            self.stats.client_idle(self.process_id, address.id);
         }
     }
 
@@ -565,14 +552,6 @@ impl Client {
 
 impl Drop for Client {
     fn drop(&mut self) {
-        // Disconnect the client
+        self.stats.client_disconnecting(self.process_id);
-        if let Some(address_id) = self.last_address_id {
-            self.stats.client_disconnecting(self.process_id, address_id);
-
-            // The server is now idle
-            if let Some(process_id) = self.last_server_id {
-                self.stats.server_idle(process_id, address_id);
-            }
-        }
     }
 }

src/config.rs

@@ -48,7 +48,6 @@ impl PartialEq<Role> for Option<Role> {
 
 #[derive(Clone, PartialEq, Hash, std::cmp::Eq, Debug)]
 pub struct Address {
-    pub id: usize,
     pub host: String,
     pub port: String,
     pub shard: usize,
@@ -59,7 +58,6 @@ pub struct Address {
 impl Default for Address {
     fn default() -> Address {
         Address {
-            id: 0,
             host: String::from("127.0.0.1"),
             port: String::from("5432"),
             shard: 0,

src/errors.rs

@@ -8,5 +8,7 @@ pub enum Error {
     // ServerTimeout,
     // DirtyServer,
     BadConfig,
+    BadUserList,
     AllServersDown,
+    AuthenticationError
 }

src/main.rs

@@ -31,6 +31,7 @@ extern crate once_cell;
 extern crate serde;
 extern crate serde_derive;
 extern crate sqlparser;
+extern crate statsd;
 extern crate tokio;
 extern crate toml;
 
@@ -49,6 +50,7 @@ use std::sync::Arc;
 mod admin;
 mod client;
 mod config;
+mod userlist;
 mod constants;
 mod errors;
 mod messages;
@@ -93,6 +95,15 @@ async fn main() {
         }
     };
 
+    // Prepare user list
+    match userlist::parse("userlist.json").await {
+        Ok(_) => (),
+        Err(err) => {
+            error!("Userlist parse error: {:?}", err);
+            return;
+        }
+    };
+
     let config = get_config();
 
     let addr = format!("{}:{}", config.general.host, config.general.port);
@@ -112,19 +123,15 @@ async fn main() {
 
     // Collect statistics and send them to StatsD
     let (tx, rx) = mpsc::channel(100);
+    let collector_tx = tx.clone();
+    tokio::task::spawn(async move {
+        let mut stats_collector = Collector::new(rx, collector_tx);
+        stats_collector.collect().await;
+    });
 
-    // Connection pool for all shards and replicas
     let mut pool =
         ConnectionPool::from_config(client_server_map.clone(), Reporter::new(tx.clone())).await;
 
-    let collector_tx = tx.clone();
-    let addresses = pool.databases();
-    tokio::task::spawn(async move {
-        let mut stats_collector = Collector::new(rx, collector_tx);
-        stats_collector.collect(addresses).await;
-    });
-
-    // Connect to all servers and validate their versions.
     let server_info = match pool.validate().await {
         Ok(info) => info,
         Err(err) => {

src/messages.rs

@@ -1,5 +1,7 @@
 /// Helper functions to send one-off protocol messages
 /// and handle TcpStream (TCP socket).
+
+
 use bytes::{Buf, BufMut, BytesMut};
 use md5::{Digest, Md5};
 use tokio::io::{AsyncReadExt, AsyncWriteExt, BufReader};
@@ -7,10 +9,16 @@ use tokio::net::{
     tcp::{OwnedReadHalf, OwnedWriteHalf},
     TcpStream,
 };
+use log::{error};
 
 use crate::errors::Error;
 use std::collections::HashMap;
 
+use rand::Rng;
+
+use crate::userlist::get_user_list;
+
+
 /// Postgres data type mappings
 /// used in RowDescription ('T') message.
 pub enum DataType {
@@ -29,6 +37,98 @@ impl From<&DataType> for i32 {
     }
 }
 
+/**
+1. Generate salt (4 bytes of random data)
+md5(concat(md5(concat(password, username)), random-salt)))
+2. Send md5 auth request
+3. recieve PasswordMessage with salt.
+4. refactor md5_password function to be reusable
+5. check username hash combo against file
+6. AuthenticationOk or ErrorResponse
+ **/
+pub async fn start_auth(stream: &mut TcpStream, user_name: &String) -> Result<(), Error> {
+    let mut rng = rand::thread_rng();
+
+    //Generate random 4 byte salt
+    let salt = rng.gen::<u32>();
+
+    // Send AuthenticationMD5Password request
+    send_md5_request(stream, salt).await?;
+
+    let code = match stream.read_u8().await {
+        Ok(code) => code as char,
+        Err(_) => return Err(Error::AuthenticationError),
+    };
+
+    match code {
+        // Password response
+        'p' => {
+            fetch_password_and_authenticate(stream, &user_name, &salt).await?;
+            Ok(auth_ok(stream).await?)
+        }
+        _ => {
+            error!("Unknown code: {}", code);
+            return Err(Error::AuthenticationError);
+        }
+    }
+}
+
+pub async fn send_md5_request(stream: &mut TcpStream, salt: u32) -> Result<(), Error> {
+    let mut authentication_md5password = BytesMut::with_capacity(12);
+    authentication_md5password.put_u8(b'R');
+    authentication_md5password.put_i32(12);
+    authentication_md5password.put_i32(5);
+    authentication_md5password.put_u32(salt);
+
+    // Send AuthenticationMD5Password request
+    Ok(write_all(stream, authentication_md5password).await?)
+}
+
+pub async fn fetch_password_and_authenticate(stream: &mut TcpStream, user_name: &String, salt: &u32) -> Result<(), Error> {
+    /**
+    1. How do I store the lists of users and paswords? clear text or hash?? wtf
+    2. Add auth to tests
+    **/
+
+    let len = match stream.read_i32().await {
+        Ok(len) => len,
+        Err(_) => return Err(Error::AuthenticationError),
+    };
+
+    // Read whatever is left.
+    let mut password_hash = vec![0u8; len as usize - 4];
+
+    match stream.read_exact(&mut password_hash).await {
+        Ok(_) => (),
+        Err(_) => return Err(Error::AuthenticationError),
+    };
+
+    let user_list = get_user_list();
+    let mut password: String = String::new();
+    match user_list.get(&user_name) {
+        Some(&p) => password = p,
+        None => return Err(Error::AuthenticationError),
+    }
+
+    let mut md5 = Md5::new();
+
+    //    concat('md5', md5(concat(md5(concat(password, username)), random-salt)))
+    // First pass
+    md5.update(&password.as_bytes());
+    md5.update(&user_name.as_bytes());
+    let output = md5.finalize_reset();
+    // Second pass
+    md5.update(format!("{:x}", output));
+    md5.update(salt.to_be_bytes().to_vec());
+
+
+    let password_string: String = String::from_utf8(password_hash).expect("Could not get password hash");
+    match format!("md5{:x}", md5.finalize()) == password_string {
+        true => Ok(()),
+        _ => Err(Error::AuthenticationError)
+    }
+}
+
 /// Tell the client that authentication handshake completed successfully.
 pub async fn auth_ok(stream: &mut TcpStream) -> Result<(), Error> {
     let mut auth_ok = BytesMut::with_capacity(9);

src/pool.rs

@@ -38,7 +38,6 @@ impl ConnectionPool {
         let mut shards = Vec::new();
         let mut addresses = Vec::new();
         let mut banlist = Vec::new();
-        let mut address_id = 0;
         let mut shard_ids = config
             .shards
             .clone()
@@ -64,7 +63,6 @@ impl ConnectionPool {
                 };
 
                 let address = Address {
-                    id: address_id,
                     host: server.0.clone(),
                     port: server.1.to_string(),
                     role: role,
@@ -72,8 +70,6 @@ impl ConnectionPool {
                     shard: shard_idx.parse::<usize>().unwrap(),
                 };
 
-                address_id += 1;
-
                 if role == Role::Replica {
                     replica_number += 1;
                 }
@@ -125,13 +121,9 @@ impl ConnectionPool {
     pub async fn validate(&mut self) -> Result<BytesMut, Error> {
         let mut server_infos = Vec::new();
 
-        let stats = self.stats.clone();
         for shard in 0..self.shards() {
             for _ in 0..self.servers(shard) {
-                // To keep stats consistent.
+                let connection = match self.get(shard, None).await {
-                let fake_process_id = 0;
-
-                let connection = match self.get(shard, None, fake_process_id).await {
                     Ok(conn) => conn,
                     Err(err) => {
                         error!("Shard {} down or misconfigured: {:?}", shard, err);
@@ -145,8 +137,6 @@ impl ConnectionPool {
 
                 let server_info = server.server_info();
 
-                stats.client_disconnecting(fake_process_id, address.id);
-
                 if server_infos.len() > 0 {
                     // Compare against the last server checked.
                     if server_info != server_infos[server_infos.len() - 1] {
@@ -175,7 +165,6 @@ impl ConnectionPool {
         &mut self,
         shard: usize,
         role: Option<Role>,
-        process_id: i32,
     ) -> Result<(PooledConnection<'_, ServerPool>, Address), Error> {
         let now = Instant::now();
         let addresses = &self.addresses[shard];
@@ -211,8 +200,6 @@ impl ConnectionPool {
             let index = self.round_robin % addresses.len();
             let address = &addresses[index];
 
-            self.stats.client_waiting(process_id, address.id);
-
             // Make sure you're getting a primary or a replica
             // as per request. If no specific role is requested, the first
             // available will be chosen.
@@ -232,9 +219,6 @@ impl ConnectionPool {
                 Err(err) => {
                     error!("Banning replica {}, error: {:?}", index, err);
                     self.ban(address, shard);
-                    self.stats.client_disconnecting(process_id, address.id);
-                    self.stats
-                        .checkout_time(now.elapsed().as_micros(), process_id, address.id);
                     continue;
                 }
             };
@@ -243,7 +227,7 @@ impl ConnectionPool {
             let server = &mut *conn;
             let healthcheck_timeout = get_config().general.healthcheck_timeout;
 
-            self.stats.server_tested(server.process_id(), address.id);
+            self.stats.server_tested(server.process_id());
 
             match tokio::time::timeout(
                 tokio::time::Duration::from_millis(healthcheck_timeout),
@@ -254,9 +238,8 @@ impl ConnectionPool {
                 // Check if health check succeeded
                 Ok(res) => match res {
                     Ok(_) => {
-                        self.stats
+                        self.stats.checkout_time(now.elapsed().as_micros());
-                            .checkout_time(now.elapsed().as_micros(), process_id, address.id);
+                        self.stats.server_idle(conn.process_id());
-                        self.stats.server_idle(conn.process_id(), address.id);
                         return Ok((conn, address.clone()));
                     }
                     Err(_) => {
@@ -265,9 +248,6 @@ impl ConnectionPool {
                         server.mark_bad();
 
                         self.ban(address, shard);
-                        self.stats.client_disconnecting(process_id, address.id);
-                        self.stats
-                            .checkout_time(now.elapsed().as_micros(), process_id, address.id);
                         continue;
                     }
                 },
@@ -278,9 +258,6 @@ impl ConnectionPool {
                     server.mark_bad();
 
                     self.ban(address, shard);
-                    self.stats.client_disconnecting(process_id, address.id);
-                    self.stats
-                        .checkout_time(now.elapsed().as_micros(), process_id, address.id);
                     continue;
                 }
             }
@@ -418,14 +395,13 @@ impl ManageConnection for ServerPool {
     async fn connect(&self) -> Result<Self::Connection, Self::Error> {
         info!(
             "Creating a new connection to {:?} using user {:?}",
-            self.address.name(),
+            self.address, self.user.name
-            self.user.name
         );
 
         // Put a temporary process_id into the stats
         // for server login.
         let process_id = rand::random::<i32>();
-        self.stats.server_login(process_id, self.address.id);
+        self.stats.server_login(process_id);
 
         match Server::startup(
             &self.address,
@@ -438,12 +414,12 @@ impl ManageConnection for ServerPool {
         {
             Ok(conn) => {
                 // Remove the temporary process_id from the stats.
-                self.stats.server_disconnecting(process_id, self.address.id);
+                self.stats.server_disconnecting(process_id);
                 Ok(conn)
             }
             Err(err) => {
                 // Remove the temporary process_id from the stats.
-                self.stats.server_disconnecting(process_id, self.address.id);
+                self.stats.server_disconnecting(process_id);
                 Err(err)
             }
         }

src/query_router.rs

@@ -12,7 +12,7 @@ use sqlparser::parser::Parser;
 
 const CUSTOM_SQL_REGEXES: [&str; 5] = [
     r"(?i)^ *SET SHARDING KEY TO '?([0-9]+)'? *;? *$",
-    r"(?i)^ *SET SHARD TO '?([0-9]+|ANY)'? *;? *$",
+    r"(?i)^ *SET SHARD TO '?([0-9]+)'? *;? *$",
     r"(?i)^ *SHOW SHARD *;? *$",
     r"(?i)^ *SET SERVER ROLE TO '(PRIMARY|REPLICA|ANY|AUTO|DEFAULT)' *;? *$",
     r"(?i)^ *SHOW SERVER ROLE *;? *$",
@@ -192,10 +192,7 @@ impl QueryRouter {
             }
 
             Command::SetShard => {
-                self.active_shard = match value.to_ascii_uppercase().as_ref() {
+                self.active_shard = Some(value.parse::<usize>().unwrap());
-                    "ANY" => Some(rand::random::<usize>() % self.shards),
-                    _ => Some(value.parse::<usize>().unwrap()),
-                };
             }
 
             Command::SetServerRole => {

src/server.rs

@@ -268,8 +268,7 @@ impl Server {
 
     /// Send messages to the server from the client.
     pub async fn send(&mut self, messages: BytesMut) -> Result<(), Error> {
-        self.stats
+        self.stats.data_sent(messages.len());
-            .data_sent(messages.len(), self.process_id, self.address.id);
 
         match write_all_half(&mut self.write, messages).await {
             Ok(_) => Ok(()),
@@ -375,8 +374,7 @@ impl Server {
         let bytes = self.buffer.clone();
 
         // Keep track of how much data we got from the server for stats.
-        self.stats
+        self.stats.data_received(bytes.len());
-            .data_received(bytes.len(), self.process_id, self.address.id);
 
         // Clear the buffer for next query.
         self.buffer.clear();
@@ -472,8 +470,7 @@ impl Drop for Server {
     /// the socket is in non-blocking mode, so it may not be ready
     /// for a write.
     fn drop(&mut self) {
-        self.stats
+        self.stats.server_disconnecting(self.process_id());
-            .server_disconnecting(self.process_id(), self.address.id);
 
         let mut bytes = BytesMut::with_capacity(4);
         bytes.put_u8(b'X');

src/stats.rs

@@ -1,20 +1,17 @@
-/// Statistics and reporting.
+use log::{debug, info};
-use log::info;
 use once_cell::sync::Lazy;
 use parking_lot::Mutex;
-use std::collections::HashMap;
+use statsd::Client;
 use tokio::sync::mpsc::{Receiver, Sender};
 
-// Latest stats updated every second; used in SHOW STATS and other admin commands.
+use std::collections::HashMap;
-static LATEST_STATS: Lazy<Mutex<HashMap<usize, HashMap<String, i64>>>> =
-    Lazy::new(|| Mutex::new(HashMap::new()));
 
-// Statistics period used for average calculations.
+use crate::config::get_config;
-// 15 seconds.
+
-static STAT_PERIOD: u64 = 15000;
+// Stats used in SHOW STATS
+static LATEST_STATS: Lazy<Mutex<HashMap<String, i64>>> = Lazy::new(|| Mutex::new(HashMap::new()));
+static STAT_PERIOD: u64 = 15000; //15 seconds
 
-/// The names for the events reported
-/// to the statistics collector.
 #[derive(Debug, Clone, Copy)]
 enum EventName {
     CheckoutTime,
@@ -31,253 +28,186 @@ enum EventName {
     ServerTested,
     ServerLogin,
     ServerDisconnecting,
-    UpdateStats,
+    FlushStatsToStatsD,
-    UpdateAverages,
 }
 
-/// Event data sent to the collector
-/// from clients and servers.
 #[derive(Debug)]
 pub struct Event {
-    /// The name of the event being reported.
     name: EventName,
-
-    /// The value being reported. Meaning differs based on event name.
     value: i64,
-
+    process_id: Option<i32>,
-    /// The client or server connection reporting the event.
-    process_id: i32,
-
-    /// The server the client is connected to.
-    address_id: usize,
 }
 
-/// The statistics reporter. An instance is given
-/// to each possible source of statistics,
-/// e.g. clients, servers, connection pool.
 #[derive(Clone, Debug)]
 pub struct Reporter {
     tx: Sender<Event>,
 }
 
 impl Reporter {
-    /// Create a new Reporter instance.
     pub fn new(tx: Sender<Event>) -> Reporter {
         Reporter { tx: tx }
     }
 
-    /// Report a query executed by a client against
+    pub fn query(&self) {
-    /// a server identified by the `address_id`.
-    pub fn query(&self, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::Query,
             value: 1,
-            process_id: process_id,
+            process_id: None,
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Report a transaction executed by a client against
+    pub fn transaction(&self) {
-    /// a server identified by the `address_id`.
-    pub fn transaction(&self, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::Transaction,
             value: 1,
-            process_id: process_id,
+            process_id: None,
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Report data sent to a server identified by `address_id`.
+    pub fn data_sent(&self, amount: usize) {
-    /// The `amount` is measured in bytes.
-    pub fn data_sent(&self, amount: usize, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::DataSent,
             value: amount as i64,
-            process_id: process_id,
+            process_id: None,
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Report data received from a server identified by `address_id`.
+    pub fn data_received(&self, amount: usize) {
-    /// The `amount` is measured in bytes.
-    pub fn data_received(&self, amount: usize, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::DataReceived,
             value: amount as i64,
-            process_id: process_id,
+            process_id: None,
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Time spent waiting to get a healthy connection from the pool
+    pub fn checkout_time(&self, ms: u128) {
-    /// for a server identified by `address_id`.
-    /// Measured in milliseconds.
-    pub fn checkout_time(&self, ms: u128, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::CheckoutTime,
             value: ms as i64,
-            process_id: process_id,
+            process_id: None,
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Reports a client identified by `process_id` waiting for a connection
+    pub fn client_waiting(&self, process_id: i32) {
-    /// to a server identified by `address_id`.
-    pub fn client_waiting(&self, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::ClientWaiting,
             value: 1,
-            process_id: process_id,
+            process_id: Some(process_id),
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Reports a client identified by `process_id` is done waiting for a connection
+    pub fn client_active(&self, process_id: i32) {
-    /// to a server identified by `address_id` and is about to query the server.
-    pub fn client_active(&self, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::ClientActive,
             value: 1,
-            process_id: process_id,
+            process_id: Some(process_id),
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Reports a client identified by `process_id` is done querying the server
+    pub fn client_idle(&self, process_id: i32) {
-    /// identified by `address_id` and is no longer active.
-    pub fn client_idle(&self, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::ClientIdle,
             value: 1,
-            process_id: process_id,
+            process_id: Some(process_id),
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Reports a client identified by `process_id` is disconecting from the pooler.
+    pub fn client_disconnecting(&self, process_id: i32) {
-    /// The last server it was connected to is identified by `address_id`.
-    pub fn client_disconnecting(&self, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::ClientDisconnecting,
             value: 1,
-            process_id: process_id,
+            process_id: Some(process_id),
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Reports a server connection identified by `process_id` for
+    pub fn server_active(&self, process_id: i32) {
-    /// a configured server identified by `address_id` is actively used
-    /// by a client.
-    pub fn server_active(&self, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::ServerActive,
             value: 1,
-            process_id: process_id,
+            process_id: Some(process_id),
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Reports a server connection identified by `process_id` for
+    pub fn server_idle(&self, process_id: i32) {
-    /// a configured server identified by `address_id` is no longer
-    /// actively used by a client and is now idle.
-    pub fn server_idle(&self, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::ServerIdle,
             value: 1,
-            process_id: process_id,
+            process_id: Some(process_id),
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Reports a server connection identified by `process_id` for
+    pub fn server_login(&self, process_id: i32) {
-    /// a configured server identified by `address_id` is attempting
-    /// to login.
-    pub fn server_login(&self, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::ServerLogin,
             value: 1,
-            process_id: process_id,
+            process_id: Some(process_id),
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Reports a server connection identified by `process_id` for
+    pub fn server_tested(&self, process_id: i32) {
-    /// a configured server identified by `address_id` is being
-    /// tested before being given to a client.
-    pub fn server_tested(&self, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::ServerTested,
             value: 1,
-            process_id: process_id,
+            process_id: Some(process_id),
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 
-    /// Reports a server connection identified by `process_id` is disconecting from the pooler.
+    pub fn server_disconnecting(&self, process_id: i32) {
-    /// The configured server it was connected to is identified by `address_id`.
-    pub fn server_disconnecting(&self, process_id: i32, address_id: usize) {
         let event = Event {
             name: EventName::ServerDisconnecting,
             value: 1,
-            process_id: process_id,
+            process_id: Some(process_id),
-            address_id: address_id,
         };
 
         let _ = self.tx.try_send(event);
     }
 }
 
-/// The statistics collector which is receiving statistics
-/// from clients, servers, and the connection pool. There is
-/// only one collector (kind of like a singleton).
-/// The collector can trigger events on its own, e.g.
-/// it updates aggregates every second and averages every
-/// 15 seconds.
 pub struct Collector {
     rx: Receiver<Event>,
     tx: Sender<Event>,
+    client: Client,
 }
 
 impl Collector {
-    /// Create a new collector instance. There should only be one instance
-    /// at a time. This is ensured by mpsc which allows only one receiver.
     pub fn new(rx: Receiver<Event>, tx: Sender<Event>) -> Collector {
-        Collector { rx, tx }
+        Collector {
+            rx,
+            tx,
+            client: Client::new(&get_config().general.statsd_address, "pgcat").unwrap(),
+        }
     }
 
-    /// The statistics collection handler. It will collect statistics
+    pub async fn collect(&mut self) {
-    /// for `address_id`s starting at 0 up to `addresses`.
-    pub async fn collect(&mut self, addresses: usize) {
         info!("Events reporter started");
 
-        let stats_template = HashMap::from([
+        let mut stats = HashMap::from([
             ("total_query_count", 0),
             ("total_xact_count", 0),
             ("total_sent", 0),
@@ -302,47 +232,25 @@ impl Collector {
             ("sv_tested", 0),
         ]);
 
-        let mut stats = HashMap::new();
-
         // Stats saved after each iteration of the flush event. Used in calculation
         // of averages in the last flush period.
-        let mut old_stats: HashMap<usize, HashMap<String, i64>> = HashMap::new();
+        let mut old_stats: HashMap<String, i64> = HashMap::new();
 
         // Track which state the client and server are at any given time.
-        let mut client_server_states: HashMap<usize, HashMap<i32, EventName>> = HashMap::new();
+        let mut client_server_states: HashMap<i32, EventName> = HashMap::new();
 
         // Flush stats to StatsD and calculate averages every 15 seconds.
-        let tx = self.tx.clone();
-        tokio::task::spawn(async move {
-            let mut interval =
-                tokio::time::interval(tokio::time::Duration::from_millis(STAT_PERIOD / 15));
-            loop {
-                interval.tick().await;
-                for address_id in 0..addresses {
-                    let _ = tx.try_send(Event {
-                        name: EventName::UpdateStats,
-                        value: 0,
-                        process_id: -1,
-                        address_id: address_id,
-                    });
-                }
-            }
-        });
-
         let tx = self.tx.clone();
         tokio::task::spawn(async move {
             let mut interval =
                 tokio::time::interval(tokio::time::Duration::from_millis(STAT_PERIOD));
             loop {
                 interval.tick().await;
-                for address_id in 0..addresses {
+                let _ = tx.try_send(Event {
-                    let _ = tx.try_send(Event {
+                    name: EventName::FlushStatsToStatsD,
-                        name: EventName::UpdateAverages,
+                    value: 0,
-                        value: 0,
+                    process_id: None,
-                        process_id: -1,
+                });
-                        address_id: address_id,
-                    });
-                }
             }
         });
 
@@ -356,14 +264,6 @@ impl Collector {
                 }
             };
 
-            let stats = stats
-                .entry(stat.address_id)
-                .or_insert(stats_template.clone());
-            let client_server_states = client_server_states
-                .entry(stat.address_id)
-                .or_insert(HashMap::new());
-            let old_stats = old_stats.entry(stat.address_id).or_insert(HashMap::new());
-
             // Some are counters, some are gauges...
             match stat.name {
                 EventName::Query => {
@@ -413,16 +313,16 @@ impl Collector {
                 | EventName::ServerIdle
                 | EventName::ServerTested
                 | EventName::ServerLogin => {
-                    client_server_states.insert(stat.process_id, stat.name);
+                    client_server_states.insert(stat.process_id.unwrap(), stat.name);
                 }
 
                 EventName::ClientDisconnecting | EventName::ServerDisconnecting => {
-                    client_server_states.remove(&stat.process_id);
+                    client_server_states.remove(&stat.process_id.unwrap());
                 }
 
-                EventName::UpdateStats => {
+                EventName::FlushStatsToStatsD => {
                     // Calculate connection states
-                    for (_, state) in client_server_states.iter() {
+                    for (_, state) in &client_server_states {
                         match state {
                             EventName::ClientActive => {
                                 let counter = stats.entry("cl_active").or_insert(0);
@@ -434,6 +334,11 @@ impl Collector {
                                 *counter += 1;
                             }
 
+                            EventName::ClientIdle => {
+                                let counter = stats.entry("cl_idle").or_insert(0);
+                                *counter += 1;
+                            }
+
                             EventName::ServerIdle => {
                                 let counter = stats.entry("sv_idle").or_insert(0);
                                 *counter += 1;
@@ -454,20 +359,39 @@ impl Collector {
                                 *counter += 1;
                             }
 
-                            EventName::ClientIdle => {
-                                let counter = stats.entry("cl_idle").or_insert(0);
-                                *counter += 1;
-                            }
-
                             _ => unreachable!(),
                         };
                     }
 
+                    // Calculate averages
+                    for stat in &[
+                        "avg_query_count",
+                        "avgxact_count",
+                        "avg_sent",
+                        "avg_received",
+                        "avg_wait_time",
+                    ] {
+                        let total_name = stat.replace("avg_", "total_");
+                        let old_value = old_stats.entry(total_name.clone()).or_insert(0);
+                        let new_value = stats.get(total_name.as_str()).unwrap_or(&0).to_owned();
+                        let avg = (new_value - *old_value) / (STAT_PERIOD as i64 / 1_000); // Avg / second
+
+                        stats.insert(stat, avg);
+                        *old_value = new_value;
+                    }
+
+                    debug!("{:?}", stats);
+
                     // Update latest stats used in SHOW STATS
                     let mut guard = LATEST_STATS.lock();
+                    for (key, value) in &stats {
+                        guard.insert(key.to_string(), value.clone());
+                    }
+
+                    let mut pipeline = self.client.pipeline();
+
                     for (key, value) in stats.iter() {
-                        let entry = guard.entry(stat.address_id).or_insert(HashMap::new());
+                        pipeline.gauge(key, *value as f64);
-                        entry.insert(key.to_string(), value.clone());
                     }
 
                     // These are re-calculated every iteration of the loop, so we don't want to add values
@@ -485,33 +409,14 @@ impl Collector {
                     ] {
                         stats.insert(stat, 0);
                     }
-                }
 
-                EventName::UpdateAverages => {
+                    pipeline.send(&self.client);
-                    // Calculate averages
-                    for stat in &[
-                        "avg_query_count",
-                        "avgxact_count",
-                        "avg_sent",
-                        "avg_received",
-                        "avg_wait_time",
-                    ] {
-                        let total_name = stat.replace("avg_", "total_");
-                        let old_value = old_stats.entry(total_name.clone()).or_insert(0);
-                        let new_value = stats.get(total_name.as_str()).unwrap_or(&0).to_owned();
-                        let avg = (new_value - *old_value) / (STAT_PERIOD as i64 / 1_000); // Avg / second
-
-                        stats.insert(stat, avg);
-                        *old_value = new_value;
-                    }
                 }
             };
         }
     }
 }
 
-/// Get a snapshot of statistics. Updated once a second
+pub fn get_stats() -> HashMap<String, i64> {
-/// by the `Collector`.
-pub fn get_stats() -> HashMap<usize, HashMap<String, i64>> {
     LATEST_STATS.lock().clone()
 }

src/userlist.json

@@ -0,0 +1,4 @@
+{
+  "sven": "clear_text_password",
+  "sharding_user": "sharding_user"
+}

src/userlist.rs

@@ -0,0 +1,57 @@
+use arc_swap::{ArcSwap, Guard};
+use log::{error};
+use once_cell::sync::Lazy;
+use tokio::fs::File;
+use tokio::io::AsyncReadExt;
+
+use std::collections::{HashMap};
+use std::sync::Arc;
+
+use crate::errors::Error;
+
+pub type UserList = HashMap<String, String>;
+static USER_LIST: Lazy<ArcSwap<UserList>> = Lazy::new(|| ArcSwap::from_pointee(HashMap::new()));
+
+pub fn get_user_list() -> Guard<Arc<UserList>> {
+    USER_LIST.load()
+}
+
+/// Parse the user list.
+pub async fn parse(path: &str) -> Result<(), Error> {
+    let mut contents = String::new();
+    let mut file = match File::open(path).await {
+        Ok(file) => file,
+        Err(err) => {
+            error!("Could not open '{}': {}", path, err.to_string());
+            return Err(Error::BadConfig);
+        }
+    };
+
+    match file.read_to_string(&mut contents).await {
+        Ok(_) => (),
+        Err(err) => {
+            error!("Could not read config file: {}", err.to_string());
+            return Err(Error::BadConfig);
+        }
+    };
+
+    let map: HashMap<String, String> = serde_json::from_str(&contents).expect("JSON was not well-formatted");
+
+
+
+    USER_LIST.store(Arc::new(map.clone()));
+
+    Ok(())
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[tokio::test]
+    async fn test_config() {
+        parse("userlist.json").await.unwrap();
+        assert_eq!(get_user_list()["sven"], "clear_text_password");
+        assert_eq!(get_user_list()["sharding_user"], "sharding_user");
+    }
+}

tests/pgbench/simple.sql

@@ -1,28 +0,0 @@
-
--- \setrandom aid 1 :naccounts
-\set aid random(1, 100000)
--- \setrandom bid 1 :nbranches
-\set bid random(1, 100000)
--- \setrandom tid 1 :ntellers
-\set tid random(1, 100000)
--- \setrandom delta -5000 5000
-\set delta random(-5000,5000)
-
-\set shard random(0, 2)
-
-SET SHARD TO :shard;
-
-BEGIN;
-
-UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;
-
-SELECT abalance FROM pgbench_accounts WHERE aid = :aid;
-
-UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid;
-
-UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;
-
-INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);
-
-END;
-