By R.M. Menon
This hugely expected publication tackles functionality matters in JDBC functions head-on, that will help you develop into a professional your self! The e-book info concisely and obviously, the appropriate points of Oracle's structure that at once influence the functionality and effectiveness of your JDBC program. writer R.M. Menon offers complete assurance of the JDBC API, with an in-depth assessment of Oracle 10g-specific gains (the publication additionally covers Oracle 9i.) Menon covers simple and complicated JDBC (standard and Oracle extensions), functionality guidance with aiding benchmarks, connection pooling, assertion caching, chosen PL/SQL concepts, Oracle items and collections, in addition to different issues.
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Additional resources for Expert Oracle JDBC Programming: High Performance Applications with Oracle 10g
When the script is complete, it exits SQL*Plus automatically, so don’t be surprised when SQL*Plus disappears after running the script. sql. sql. Setting Up the BENCHMARK/BENCHMARK Schema Some of the code examples in this book have a user called BENCHMARK with the password BENCHMARK. sql in the directory code\mysqlscripts. com. The content of the script follows. dba_segments to benchmark; -- for block dump select on v_$process to benchmark Performance Tools We’ll also make use of other performance tools throughout the book.
Let’s now create the tables on which we’ll run the query. First we create a table, t, with just one number column, x: benchmark@ORA10G> create table t ( x number ); Table created. Then we insert 10,000 0s and 10,000 1s into table t. For this, we use the mod function on the rownum pseudo column in a query from a Cartesian product of the views all_objects and all_users: benchmark@ORA10G> insert into t select mod(rownum, 2 ) from all_objects, all_users where rownum <= 20000; 20000 rows created. benchmark@ORA10G> select count(*) from t where x = 0; 10000 benchmark@ORA10G> select count(*) from t where x = 1; 10000 benchmark@ORA10G> commit; Commit complete.
Note that each of the methods firstMethod(), secondMethod(), and thirdMethod() is overloaded to take a connection and an array of objects since most of our benchmarks require a connection to be passed. The object array is useful if we want to pass additional parameters to each method. CHAPTER 1 ■ PERFORMANCE TOOLKIT The following timeMethod() method runs the actual timing of the method being benchmarked. It takes as parameters a method number indicating which method to benchmark (firstMethod(), secondMethod(), or thirdMethod()), a connection, an array of optional object parameters, and a message to print before the benchmark is run.