refactor: 串行加载表结构

Author: zhou-hao

hsweb-easy-orm-rdb/src/main/java/org/hswebframework/ezorm/rdb/supports/commons/RDBTableMetadataParser.java

@@ -138,7 +138,7 @@ public Mono<RDBTableMetadata> parseByNameReactive(String name) {
                     .doOnNext(metaData::addIndex);
 
                 return Flux
-                    .merge(columns, comments, index)
+                    .concat(columns, comments, index)
                     .then(Mono.just(metaData));
             })
             .contextWrite(logContext);