Restore from 2 SQL files while resolving table differences (think of it as array_merge for a DB restore)
The CREATE TABLE and INSERT statements in filename2 take precedence of those in filename1. INSERT statements from both will be executed, with filename2 INSERTs updating those of filename1. CREATE TABLE statements in filename1 won't be executed if they also exist in filename2.
This method assumes both files follow the SQL dump format created by this class.
$bool = $backup->restoreMerge(string $filename1, string $filename2, array $options);
Filename that may have statements that will update/override those in filename1
True on success, false on fail.
Method can throw exceptions on error:
WireException- if $options['haltOnErrors'] == true.
API reference based on ProcessWire core version 3.0.160