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##### execution_state::info

Returns additional text information about this resultset.

###### Synopsis

    string_view
    info() const noexcept;

###### Description

The format of this information is documented by MySQL here.

The returned string always uses ASCII encoding, regardless of the connection's character set.

###### Exception safety

No-throw guarantee.

###### Preconditions

`this->complete() == true || this->should_read_head() == true`

###### Object lifetimes

This function returns a view object, with reference semantics. The returned view points into memory owned by `*this`, and will be valid as long as `*this` or an object move-constructed from `*this` are alive.