Adding support for BLOB columns (mapped to ArrayBuffer)

cpp/sequel.cpp

@@ -229,6 +229,16 @@ void bindStatement(sqlite3_stmt *statement, jsi::Runtime &rt, jsi::Value const &
 
       sqlite3_bind_text(statement, ii + 1, strVal.c_str(), strVal.length(), SQLITE_TRANSIENT);
     }
+    else if (value.isObject())
+    {
+      auto obj = value.asObject(rt);
+      if (obj.isArrayBuffer(rt))
+      {
+        auto buf = obj.getArrayBuffer(rt);
+        // The statement is executed before returning control to JSI, so we don't need to copy the data to extend its lifetime.
+        sqlite3_bind_blob(statement, ii + 1, buf.data(rt), buf.size(rt), SQLITE_STATIC);
+      }
+    }
   }
 }
 
@@ -312,6 +322,19 @@ SequelResult sequel_execute(jsi::Runtime &rt, string const dbName, string const
           break;
         }
 
+        case SQLITE_BLOB:
+        {
+          int blob_size = sqlite3_column_bytes(statement, i);
+          const void *blob = sqlite3_column_blob(statement, i);
+          jsi::Function array_buffer_ctor = rt.global().getPropertyAsFunction(rt, "ArrayBuffer");
+          jsi::Object o = array_buffer_ctor.callAsConstructor(rt, blob_size).getObject(rt);
+          jsi::ArrayBuffer buf = o.getArrayBuffer(rt);
+          // It's a shame we have to copy here: see https://github.com/facebook/hermes/pull/419 and https://github.com/facebook/hermes/issues/564.
+          memcpy(buf.data(rt), blob, blob_size);
+          entry.setProperty(rt, column_name.c_str(), o);
+          break;
+        }
+
         case SQLITE_NULL:
         // Intentionally left blank to switch to default case
         default:

example/package.json

@@ -10,6 +10,7 @@
     "postinstall": "patch-package"
   },
   "dependencies": {
+    "buffer": "^6.0.3",
     "react": "16.13.1",
     "react-native": "0.63.4",
     "typeorm": "^0.2.36"

example/src/App.tsx

@@ -2,13 +2,15 @@ import 'reflect-metadata';
 import * as React from 'react';
 import {
   StyleSheet,
+  Image,
   View,
   Text,
   FlatList,
   ListRenderItemInfo,
 } from 'react-native';
 import { createDb } from './Database';
 import type { User } from './model/User';
+import { Buffer } from "buffer";
 
 export default function App() {
   let [users, setUsers] = React.useState<User[]>([]);
@@ -34,6 +36,7 @@ export default function App() {
                 backgroundColor: 'white',
               }}
             >
+              <Image style={{width: 64, height: 64}} source={{uri: `data:image/png;base64,${Buffer.from(info.item.avatar).toString("base64")}`}}></Image>
               <Text style={{ fontWeight: 'bold' }}>Name</Text>
               <Text>{info.item.name}</Text>
               <Text style={{ fontWeight: 'bold', marginTop: 10 }}>Age</Text>

example/src/Database.ts

@@ -1,6 +1,7 @@
 import { createConnection, getRepository } from 'typeorm';
 import { Book } from './model/Book';
 import { User } from './model/User';
+import { Buffer } from "buffer";
 
 export const createDb = async () => {
   await createConnection({
@@ -24,6 +25,7 @@ export const createDb = async () => {
     nickname:
       '<p>We deliver that something because <em>some interesting text!</em></p>\n<p>Always remember...  </p>\n<p><strong>some 🧟‍♀️ 🧚 🍉 text here.</strong></p>\n',
   };
+  user1.avatar = Buffer.from("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", "base64").buffer;
 
   // const book1 = new Book();
   // book1.title = 'Lord of the rings';

example/src/model/User.ts

@@ -21,4 +21,7 @@ export class User {
 
   @Column("simple-json")
   metadata: { nickname: string };
-}
+
+  @Column("blob")
+  avatar: ArrayBuffer;
+}