#PERFINO SEE JDBC STATEMENTS EXECUTED UPDATE#
#PERFINO SEE JDBC STATEMENTS EXECUTED DRIVER#

It might be safer to just close() the statement rather than trying to cache it somehow. Statement and/or Connection from multiple concurrent threads (except cancel(), close(), and alike cases). Note: the Statement object is bound to a Connection, and it is not a good idea to access the same However pgjdbc can use server side prepared statements in both cases. PreparedStatement ps = con.prepareStatement('select /*test*/ ?::int4')

#PERFINO SEE JDBC STATEMENTS EXECUTED DRIVER#

However the driver is able to server-prepare statements automatically across connection.prepareStatement(.) calls. It is generally a good idea to reuse the same PreparedStatement object for performance reasons, Reaches the threshold it will start to use server side prepared statements. In order to get to server-side prepare, you need to execute the query 5 times (that can beĬonfigured via prepareThreshold connection property).Īn internal counter keeps track of how many times the statement has been executed and when it The driver uses server side prepared statements by default when PreparedStatement API is used. Protocol-level equivalents which avoid these changes in query results.

#PERFINO SEE JDBC STATEMENTS EXECUTED UPDATE#

Missing ResultSet metadata and row update counts. With 7.3, but produced application-visible changes in query results, such as This is supported on all server versions beginning Previous versions of the driver used PREPARE and EXECUTE to implement The client can reuse result set column definition, so it does not have to receive and parse metadata on each execution.It enables the reuse server-side execution plan.

binary int4, binary timestamps, etc) the parameters and results are much faster to parse It enables use of binary transfer (e.g.Server side prepared statements can improve execution speed as The planner decides that the generic plan is not too much more expensive than the specific plans. Sent (the query will be planned at execution), except if the query is executed several times and With 9.2, the planner will use specific plans regarding to the parameters PostgreSQL 9.2 release notes: prepared statements used to be optimized once, without any knowledge Version 7.4, but as Java developers we really just want to use the standard This functionality is available at the SQL level via PREPARE and EXECUTEīeginning with server version 7.3, and at the protocol level beginning with server To be reused to avoid the overhead of parsing and planning the statement for everyĮxecution. The PostgreSQL™ server allows clients to compile sql statements that are expected

Perfino see jdbc statements executed