refactor: remove unnecessary error checking in PostgresAdapter (#7761)

src/Adapters/Storage/Postgres/PostgresStorageAdapter.js

@@ -15,7 +15,6 @@ const PostgresRelationDoesNotExistError = '42P01';
 const PostgresDuplicateRelationError = '42P07';
 const PostgresDuplicateColumnError = '42701';
 const PostgresMissingColumnError = '42703';
-const PostgresDuplicateObjectError = '42710';
 const PostgresUniqueIndexViolationError = '23505';
 const logger = require('../../../logger');
 
@@ -906,15 +905,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
         'CREATE TABLE IF NOT EXISTS "_SCHEMA" ( "className" varChar(120), "schema" jsonb, "isParseClass" bool, PRIMARY KEY ("className") )'
       )
       .catch(error => {
-        if (
+        throw error;
-          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;
-        }
       });
   }
 
@@ -2450,23 +2441,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
       : fieldNames.map((fieldName, index) => `$${index + 3}:name`);
     const qs = `CREATE INDEX IF NOT EXISTS $1:name ON $2:name (${constraintPatterns.join()})`;
     await conn.none(qs, [indexNameOptions.name, className, ...fieldNames]).catch(error => {
-      if (
+      throw error;
-        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;
-      }
     });
   }
 }