more strategic connection closing in pg

packages/server/src/integrations/postgres.ts

@@ -147,7 +147,7 @@ module PostgresModule {
       return parts.join(" || ")
     }
 
-    async internalQuery(query: SqlQuery) {
+    async internalQuery(query: SqlQuery, close: boolean = true) {
       const client = this.client
       this.index = 1
       // need to handle a specific issue with json data types in postgres,
@@ -164,10 +164,11 @@ module PostgresModule {
       try {
         return await client.query(query.sql, query.bindings || [])
       } catch (err) {
+        await this.client.end()
         // @ts-ignore
         throw new Error(err)
       } finally {
-        await this.client.end()
+        if (close) await this.client.end()
       }
     }
 
@@ -204,11 +205,11 @@ module PostgresModule {
         }
       } catch (err) {
         tableKeys = {}
-      } finally {
-        await this.client.close()
       }
 
+      try {
         const columnsResponse = await this.client.query(this.COLUMNS_SQL)
+
         const tables: { [key: string]: Table } = {}
 
         for (let column of columnsResponse.rows) {
@@ -246,6 +247,12 @@ module PostgresModule {
         const final = finaliseExternalTables(tables, entities)
         this.tables = final.tables
         this.schemaErrors = final.errors
+      } catch (err) {
+        // @ts-ignore
+        throw new Error(err)
+      } finally {
+        await this.client.end()
+      }
     }
 
     async create(query: SqlQuery | string) {
@@ -274,8 +281,9 @@ module PostgresModule {
       if (Array.isArray(input)) {
         const responses = []
         for (let query of input) {
-          responses.push(await this.internalQuery(query))
+          responses.push(await this.internalQuery(query, false))
         }
+        await this.client.end()
         return responses
       } else {
         const response = await this.internalQuery(input)