PG: Fix updating mixed array (#5552)

* PG: Fix updating mixed array

* Revert "PG: Fix updating mixed array"

This reverts commit 5a44141.

* simple fix

Author: dplewis

Diff for: spec/ParseQuery.spec.js

@@ -4637,4 +4637,23 @@ describe('Parse.Query testing', () => {
     const results = await query.find();
     equal(results[0].get('array'), data2);
   });
+
+  it('can update mixed array more than 100 elements', async () => {
+    const array = [0, 1.1, 'hello world', { foo: 'bar' }, null];
+    const obj = new TestObject({ array });
+    await obj.save();
+
+    const query = new Parse.Query(TestObject);
+    const result = await query.get(obj.id);
+    equal(result.get('array').length, 5);
+
+    for (let i = 0; i < 100; i += 1) {
+      array.push(i);
+    }
+    obj.set('array', array);
+    await obj.save();
+
+    const results = await query.find();
+    equal(results[0].get('array').length, 105);
+  });
 });

Diff for: src/Adapters/Storage/Postgres/PostgresStorageAdapter.js

@@ -1672,33 +1672,9 @@ export class PostgresStorageAdapter implements StorageAdapter {
           values.push(fieldName, fieldValue);
           index += 2;
         } else {
-          values.push(fieldName);
-          const buildSQLArray = fieldValue => {
-            let pattern = 'json_build_array(';
-            for (let i = 0; i < fieldValue.length; i += 1) {
-              const element = fieldValue[i];
-              let type = '';
-              if (Array.isArray(element)) {
-                pattern += buildSQLArray(element) + ',';
-                continue;
-              } else if (typeof element == 'object') {
-                type = '::json';
-              }
-              values.push(element);
-              pattern += `$${index + 1}${type},`;
-              index += 1;
-            }
-            // remove last comma
-            if (fieldValue.length > 0) {
-              pattern = pattern.slice(0, -1);
-            }
-            pattern += ')';
-            return pattern;
-          };
-          const sql = `$${index}:name = ${buildSQLArray(fieldValue)}`;
-
-          updatePatterns.push(sql);
-          index += 1;
+          updatePatterns.push(`$${index}:name = $${index + 1}::jsonb`);
+          values.push(fieldName, JSON.stringify(fieldValue));
+          index += 2;
         }
       } else {
         debug('Not supported update', fieldName, fieldValue);