For more query examples, seeQuery Documentsin the MongoDB manual. Match by Substring The following query filter uses the$regexoperator to find all documents where the value ofemailincludes the term "andrea_le": { email: { $regex: "andrea_le" } } ...
*/int[] createTabInd = RouterUtil.getCreateTablePos(upStmt,0);if(createTabInd[0] >0) {inttableNameIndex=createTabInd[0] + createTabInd[1];if(upStmt.length() > tableNameIndex) {StringtableName=stmt.substring(tableNameIndex).trim();intind2=tableName.indexOf('.');if(ind2 >0) { ...
An array of only a single document with a single field is a good start, to get the feel for running a query to see if that document matches. In the example shown above, the document has a string name field that contains the word “Playground.” The Data Source pane also has a separa...
"tags": ['Mongodb','Index','Query'], "pages": 3, "time": ISODate("2017-04-09T11:43:39.236Z") }, { "_id": ObjectId("58e1d2f0bb1bbc3245fa7572") "title":"MongoDB Query", "author":"eryueyang", "tags": ['Mongodb','Query'], "pages": 8, "time": ISODate("2017-04-...
测试程序点击这里下载。测试基于单个master的mongodb,后续测试发现,如果开启master/slave的话,写入速度非常不稳定,在向slave传送数据的时候写入速度下降50%到80%。还有就是mongodb随着并发的上升并没有带来写入速度上的提高,反而下降了一点,可能是因为读写锁的关系。
In regular expressions, the^character is an anchor that asserts the start of a line or string. When used in a regular expression pattern, it ensures that the matched substring begins at the beginning of the target string. To perform a “starts with” query in MongoDB using regular expression...
String bucket; /** * 下载地址 **/ @Value("${minio.http-url}") private String httpUrl; /** * 判断是否图片 */ private boolean isImage(String fileName) { //设置允许上传文件类型 String suffixList = "jpg,gif,png,ico,bmp,jpeg"; // 获取文件后缀 String suffix = fileName.substring(file...
String format = reader.getFormatName().toLowerCase(); if(ArrayUtils.contains(IMAGE_FORMAT, format)) { formats.add(format); } } }catch (Exception ex) { // } //如果格式不合法,则直接返回 if(formats.isEmpty()) { try { imageInputStream.close(); ...
It shows the specific query that was actually run, important in the case of a SQL batch that contains multiple queries. In the screenshot above, only the first query appears underneath theSQL Querytab because it is the SQL statement that ran at the cursor. ...
substring(property.indexOf(".") + 1); isCompositeColumn = true; } /* * if a composite key. "." assuming "." is part of * property in case of embeddable only */ else if (StringUtils.contains(property, '.')) { EntityType entity = metaModel.entity(m.getEntityClazz()); String...