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Avoid using SOQL subqueries for query locator error #8
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Record Clone has been using SOQL subqueries to fetch child relationship records so to simplify and minimize the SOQL executions. However when child records are too many , it causes Aggregate Query Error and Invalid Query Locator Error when trying to access the child data bypassing its parent data. In additions to the number of records, it has been reported that there are some odd cases causing the same error with small number of child records, which is not documented in any help page.
Taking the situations into account, using SOQL subqueries for obtaining child records is replaced with simple SOQLs executed for each sobject. It increases the number of SOQL executions, but it follows the rules of governor limits that makes it observable.