Question

Are sql statements such as CREATE TABLE tbl_name ….. allowed in transactions.

For example:

begin;

CREATE TABLE .......;

sdfghjk;

rollback;

The table is still created despite a statement in the transaction failing, and a rollback at the end. Is there a way to prevent the table from being created if a statement in the transaction fails?

Answer 1

DDL statements are allowed within transactions, but are not generally impacted by the transactions. From the MySQL Documentation on what can and cannot be rolled back:

Some statements cannot be rolled back. In general, these include data
definition language (DDL) statements, such as those that create or
drop databases, those that create, drop, or alter tables or stored
routines.

You should design your transactions not to include such statements. If
you issue a statement early in a transaction that cannot be rolled
back, and then another statement later fails, the full effect of the
transaction cannot be rolled back in such cases by issuing a ROLLBACK
statement.

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