Don't prepare named statements twice

Author: abenhamdine

Diff for: packages/pg/lib/client.js

@@ -498,6 +498,10 @@ class Client extends EventEmitter {
       }
       this.blocked = query.blocking
       this.sentQueryQueue.push(query)
+      if (query.name) {
+        console.log(`we store that ${query.name} has been submitted`)
+        this.connection.submittedNamedStatements[query.name] = query.text
+      }
     }
 
     if (this.readyForQuery === true) {

Diff for: packages/pg/lib/connection.js

@@ -19,6 +19,8 @@ class Connection extends EventEmitter {
     this._keepAliveInitialDelayMillis = config.keepAliveInitialDelayMillis
     this.lastBuffer = false
     this.parsedStatements = {}
+    // to track preparation of statements submitted to server
+    this.submittedNamedStatements = {}
     this.ssl = config.ssl || false
     this._ending = false
     this._emitMessage = false

Diff for: packages/pg/lib/query.js

@@ -160,6 +160,12 @@ class Query extends EventEmitter {
   }
 
   hasBeenParsed(connection) {
+    if (connection.submittedNamedStatements[this.name]) {
+      console.log(`-----------------------------------`)
+      console.log(`query.hasBeenParsed :  This statement has already been prepared`)
+      console.log(`-----------------------------------`)
+      return true
+    }
     return this.name && connection.parsedStatements[this.name]
   }