revert adapter file

Author: cbaker6

src/Adapters/Storage/Postgres/PostgresStorageAdapter.js

@@ -15,6 +15,7 @@ const PostgresRelationDoesNotExistError = '42P01';
 const PostgresDuplicateRelationError = '42P07';
 const PostgresDuplicateColumnError = '42701';
 const PostgresMissingColumnError = '42703';
+const PostgresDuplicateObjectError = '42710';
 const PostgresUniqueIndexViolationError = '23505';
 const logger = require('../../../logger');
 
@@ -905,7 +906,15 @@ export class PostgresStorageAdapter implements StorageAdapter {
         'CREATE TABLE IF NOT EXISTS "_SCHEMA" ( "className" varChar(120), "schema" jsonb, "isParseClass" bool, PRIMARY KEY ("className") )'
       )
       .catch(error => {
-        throw error;
+        if (
+          error.code === PostgresDuplicateRelationError ||
+          error.code === PostgresUniqueIndexViolationError ||
+          error.code === PostgresDuplicateObjectError
+        ) {
+          // Table already exists, must have been created by a different request. Ignore error.
+        } else {
+          throw error;
+        }
       });
   }
 
@@ -2446,7 +2455,23 @@ export class PostgresStorageAdapter implements StorageAdapter {
     }
     await conn.none(qs, [indexNameOptions.name, className, ...fieldNames])
       .catch(error => {
-        throw error;
+        if (
+          error.code === PostgresDuplicateRelationError &&
+          error.message.includes(indexNameOptions.name)
+        ) {
+          // Index already exists. Ignore error.
+        } else if (
+          error.code === PostgresUniqueIndexViolationError &&
+          error.message.includes(indexNameOptions.name)
+        ) {
+          // Cast the error into the proper parse error
+          throw new Parse.Error(
+            Parse.Error.DUPLICATE_VALUE,
+            'A duplicate value for a field with unique values was provided'
+          );
+        } else {
+          throw error;
+        }
       });
   }