My question is fairly simple. Is Java used internally by Oracle in their DBMSs?
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1 Answer
No.
All (standard) packages are written in PL/SQL. The DBMS engine itself is written in C
Edit:
Oracle does include a JVM which runs on the same machine as the database itself, but that is not used to run any "DBMS related" code.
It's only there to run stored procedures/functions written in Java.
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5Check out their "History Timeline": oracle.com/us/corporate/timeline/index.html: 1983: "Oracle releases Version 3 of its database, with server code written in the C programming language"– user1822Commented Sep 13, 2011 at 10:24
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My guess is Java is not exists then. I think first Java came at Oracle 8i. Commented Sep 13, 2011 at 16:59
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4The internal JVM is not used to run any "DBMS related" code. It's only there to run stored procedures/functions written in Java.– user1822Commented Sep 13, 2011 at 18:27
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7@a_horse_with_no_name - I guess it depends on what you mean by "standard" packages. Oracle ships a number of packages that are built in Java (anything that uses XDB, for example, including many of the XMLQuery packages, depend on the internal JVM). These aren't "standard" in the sense of packages that most developers use frequently. But they are "standard" in the sense that they are installed when you do a default installation of the Oracle database. Commented Sep 13, 2011 at 20:30