I have the follow code in my JAVA program that allows me to copy data from a file into my Postgres database: This code works fine, but I would like to use a connection pool to manage my connections, as I have this code running for numerous files. So I used C3P0. However, when i get a connection from the
Tag: postgresql
Hibernate startup very slow
For some reason, the startup of my hibernate application is unbarrably slow. (up to 2 min) I have been thinking that the c3p0 configuration is plain wrong (related question) but studying the logs shows, that there is no activity just after the connection to the server is established. Also, using the built-in polling capabilities of Hibernate shows the same result.
Size of byte array gets double when it retrieve from Postgres database
I am using JSF2.0, jetty server and Postgres database. I want to store mp3 file in database in byte array formet. I upload the byte array of mp3 file. But when I retrive same byte array from database I get byte array of double size and my because of that my mp3 file is not working as well. Output: Upload
What is the most recommended way to store time in PostgreSQL using Java?
I’m storing two dates in the PostgreSQL database. First, is the data of visit of a webpage, and the second date is the date of last modification of the webpage(this is get as a long). I have some doubts what is the best strategy to store these values. I only need day/month/year and hour:seconds and this will only for statistical
Which PostgreSQL column type should be used to store a Java BigDecimal?
What PostgreSQL column type should I use to store a Java BigDecimal? Answer See PostgreSQL datatypes – perhaps Numeric, which can act as an arbitrary precision type (this is a PostgreSQL extension). …without any precision or scale creates a column in which numeric values of any precision and scale can be stored, up to the implementation limit on precision. I
Mapping array with Hibernate
Can you please help me to map this class using Hibernate? I’m using PostgreSQL and the column type in the table is integer[] How my array should be mapped? Answer I have never mapped arrays to hibernate. I always use collections. So, I have slightly changed you class:
How to map a PostgreSQL array with Hibernate
Has anyone successfully mapped a numeric array in PostgreSQL to a numeric array in Java via Hibernate? SQL: Mapping: Class: I get an exception when querying the table. Answer Hibernate does not support database arrays (e.g. ones mapped to java.sql.Array) out of the box. array and primitive-array types provided by Hibernate are for mapping Java arrays into backing table –