jdbc

问题 I have a database which is using composite keys. Is it possible to utilize spring-data-jdbc? I tried the milestone version 1.1M2 where I mapped my entity in the following way: class History { @ID @Embedded private CompositeHistoryID id; } Then in my repository class, I added HistoryRepository extends Repository<History,CompositeHistoryID >{ History findByhId(CompositeHistoryID id) } I traced the SQL, and it did not work. The embedded part worked, but the where clause was not correct. It was

问题 While writing from Pyspark to Netezza Im constantly getting following error (Issue persists when the size of the dataframe increases, no issues in appending for small dataframes with 10 to 60 rows) : org.netezza.error.NzSQLException: failed to create external table for bulk load at org.netezza.sql.NzPreparedStatament.executeBatch(NzPreparedStatament.java:1140) at org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$.savePartition(JdbcUtils.scala:667) at org.apache.spark.sql.execution

问题 Created a fresh boot project with just jdbc and Oracle jdbc as dependencies <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jdbc</artifactId> </dependency> <dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc8</artifactId> <version>12.2.0.1</version> </dependency> I configure the datasource in the application.properties file and run this simple application and it bombs with below stacktrace. 2020-05-25 15:07:16.769 WARN 11840 --- [ main] s

问题 Created a fresh boot project with just jdbc and Oracle jdbc as dependencies <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jdbc</artifactId> </dependency> <dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc8</artifactId> <version>12.2.0.1</version> </dependency> I configure the datasource in the application.properties file and run this simple application and it bombs with below stacktrace. 2020-05-25 15:07:16.769 WARN 11840 --- [ main] s

问题 Currently I have a dynamic table inside the form using the following HTML and Javascript code: <script type="text/javascript"> function addRows(){ var table = document.getElementById('tourdaytbl'); var rowCount = table.rows.length; var cellCount = table.rows[0].cells.length; var row = table.insertRow(rowCount); for(var i =0; i <= cellCount; i++){ var cell = 'cell'+i; cell = row.insertCell(i); var copycel = document.getElementById('col'+i).innerHTML; cell.innerHTML=copycel; } } function

问题 When using a UUID data type as the primary key of a table, and asking H2 to generate each UUID value by default upon INSERT of a new record, how does one access the value of the newly generated UUID value? I am using plain JDBC 4.x in a Java app, if that helps with a solution. I know SCOPE_IDENTITY function returns a long for a key generated on a column marked as IDENTITY for an auto-incrementing sequence number. But I am using UUID rather than an incrementing number as my primary key column

问题 I am using the below code in google apps script to insert employee record from a Google Sheet into a mysql database. The stored procedure [dbo].[insertemployee] accepts "@empname" parameter. var empname = 'test'; var mysqldbconn = Jdbc.getConnection(url,username,password); var mysqlquery = mysqldbconn.createStatement(); callstoredprocedure = "{call [dbo].[testemployee](?)}"; mysqlquery = mysqldbconn.prepareCall(callstoredprocedure); mysqlquery.setString(1, empname); mysqlquery.executeUpdate()

问题 I'm using R to do a statistical analysis on a SQL Server 2008 R2 database. My database client (aka driver) is JDBC and thereby I'm using RJDBC package. My query is pretty simple and I'm sure that query would return a lot of rows (about 2 million rows). SELECT * FROM [maindb].[dbo].[users] My R script is as follows. library(RJDBC); javaPackageName <- "com.microsoft.sqlserver.jdbc.SQLServerDriver"; clientJarFile <- "/home/abforce/mystuff/sqljdbc_3.0/enu/sqljdbc4.jar"; driver <- JDBC

问题 I have ES 2.2 and installed JDBC importer for Elasticsearch elasticsearch-jdbc-2.2.0.0 and have been able to insert data, but not being to update ES with a change in mysql, ie. syncing of mysql with ES. How do i do the sync? I executed the following shell script once, data got inserted properly but the scheduler dint work. It is not executing every minute to capture any changes in mysql(schemes table). Is there something wrong in my script? or any workaround available? DIR="$( cd "$( dirname

问题 I have a database with at least 500 tables. What is the exact code to get all the primary keys and foreign keys of each table? //Primary Key DatabaseMetaData meta=conn.getMetaData(); ResultSet rs1= meta.getTables(null, null, "TableName" , new String[]{"TABLE"}); rs1=meta.getPrimaryKeys(null, null, "TableName"); while(rs1.next()) System.out.println("Primary Key :"+rs1.getString(4)); //Foreign Key rs1=meta.getExportedKeys(null, null, "TableName"); while(rs1.next()) System.out.println("Foreign