check_validity

Description:

public bool check_validity (Connection? cnc) throws Error

If cnc is not null, then checks that all the database objects referenced in the statement actually exist in the connection's database (for example the table being updated in a UPDATE statement must exist in the connection's database for the check to succeed).

This method fills the this->validity_meta_struct attribute.

If cnc is null, then remove any information from a previous call to this method stored in this. In this case, the this->validity_meta_struct attribute is cleared.

Also note that some parts of this may be modified: for example leading and trailing spaces in aliases or objects names will be removed.

Parameters:

this	a SqlStatement pointer
cnc	a Connection object, or null

Returns:

TRUE if no error occurred