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What is the requirements for Database-Side JDBC Procedures Using Nested Connections?
In order to preserve transactional atomicity, database-side JDBC procedures that use nested connections:
* cannot issue a commit or rollback, unless called within a CALL or VALUES statement.
Commits are permitted when the procedure is called within a CALL or VALUES statement.
* cannot change connection attributes such as auto-commit.
* cannot modify the data in a table used by the parent statement that called the procedure, using INSERT, UPDATE, or DELETE. For example, if a SELECT statement using the T table calls the changeTables procedure, changeTables cannot modify data in the T table.
* cannot drop a table used by the statement that called the procedure.
* cannot be in a class whose static initializer executes DDL statements.
In addition, the Connection object that represents the nested connection always has its auto-commit mode set to false
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