For #3311, get origin value for tinyint(1) instead of boolean for sharding-proxy (#3338)

sharding-proxy/sharding-proxy-backend/src/main/java/org/apache/shardingsphere/shardingproxy/backend/communication/jdbc/datasource/JDBCRawBackendDataSourceFactory.java

@@ -73,6 +73,7 @@ public final class JDBCRawBackendDataSourceFactory implements JDBCBackendDataSou
         config.addDataSourceProperty("elideSetAutoCommits", Boolean.TRUE.toString());
         config.addDataSourceProperty("maintainTimeStats", Boolean.FALSE.toString());
         config.addDataSourceProperty("netTimeoutForStreamingResults", 0);
+        config.addDataSourceProperty("tinyInt1isBit", Boolean.FALSE.toString());
         return new HikariDataSource(config);
     }