The SQL/PSM standard comes from Oracle, and is variously implemented in PostgreSQL, MariaDB, IBM Db2, and more. https://en.m.wikipedia.org/wiki/SQL/PSM https:/

The SQL/PSM standard comes from Oracle, and is variously implemented in PostgreSQL, MariaDB, IBM Db2, and more. https://en.m.wikipedia.org/wiki/SQL/PSM https://en.m.wikipedia.org/wiki/SQL/PSM "SQL/PSM is derived, seemingly directly, from Oracle's PL/SQL. Oracle developed PL/SQL and released it in 1991, basing the language on the US Department of Defense's Ada programming language. However, Oracle has maintained a distance from the standard in its documentation. IBM's SQL PL (used in DB2) and Mimer SQL's PSM were the first two products officially implementing SQL/PSM."