How can I use IN query with NamedParameterJdbcTemplate? I put ‘surname1′,’surname2′ and surname1’,’surname2 in params, so :surname would be ‘surname1′,’surname2’, but both didn’t work. When there was only gender parameter, it worked. How can I …
Tag: jdbctemplate
How to get list of Map data using JDBCTemplate.queryForMap
How I can get proper return type of List<Map<String, Object>> mapList = jdbctemplate.queryForList(query)); Where my query is “SELECT * FROM table_name;”. Can anyone help me? Answer You can use the following snippet to get the required map from the list: mapList.stream().collect(Collect…
BigQuery TableResult casting options
How can I cast the TableResult to the following format List<Map<String, Any>> Map contains the columns and its value respectively. Multiple rows are added to the list. I tried something like this, but it throws an error -> com.google.cloud.bigquery.TableResult cannot be cast to java.util.List H…
How to fix data conversion error: jdbcTemplate.update, writing Enum to H2 database
I use PostgreSql for my main code and H2 for testing, and get different results (test fails). My class with an Enum type field SQL schema is My DAO class In my test method: Everything works with PostgreSql, but test with H2 fails with data conversion error: I think “java.sql.Types.OTHER” that I us…
What is the jdbctemplate dynamic query parameters limit?
I am trying to perform a read operation on my PostgreSQL database. I am using SpringTemplate and I am passing dynamic parameters to it. “SELECT id, name FROM Student WHERE id IN :id” Here, id=(1,2,3,4,5…) What is the maximum number of elements I can pass in ID without breaking my JDBC connec…
Write unit test for jdbcTemplate.batchUpdate() method
I have jdbcTemplate code, on which I am trying to write a unit test case. But the problem is I am unable to cover the full code. I am able to cover till: try{jdbcTemplate.batchUpdate(“update query”, new BatchPreparedStatementSetter(){ Test code snippet Please help. Answer Here the difficulty is th…
Why can ‘CURRENT_DATE’ not as a parameter when using NamedParameterJdbcTemplate in JAVA?
In mysql,I use this sql and it runs well. select * from student where CREATE_TIME>=DATE_SUB(curdate(),INTERVAL 24 HOUR) Now I want to use the date as a parameter,SO I use NamedParameterJdbcTemplate,If I pass the date like ‘2020-05-30’,it also runs well.But when I pass ‘CURRENT_DATE’…
jdbctemplate count queryForInt and pass multiple parameters
How can I pass multiple parameters in jdbcTemplate queryForInt to get the count. I have tried this, But its showing queryForInt as strikes. Answer Both queryForInt() and queryForLong() are deprecated since version 3.2.2 (correct me if mistake). To fix it, replace the code with queryForObject(String, Class). A…
What are template classes in Spring Java? Why are they called templates? For example jdbc-template, jms-template etc
I’m new to Java. I’ve only been programming it for about a year. What does Spring mean by the use of templates? In Spring, there is jdbc-templates, jms-templates etc.. What are template classes in java? Are they a special kind of design pattern or what? Thank you in advance. Answer They are called…
How to use PostgreSQL hstore/json with JdbcTemplate
Is there a way to use PostgreSQL json/hstore with JdbcTemplate? esp query support. for eg: hstore: for Json Answer Although quite late for an answer (for the insert part), I hope it might be useful someone else: Take the key/value pairs in a HashMap: use one of the following way to insert them to PostgreSQL: …