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MySQL 5.7 Reference Manual
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Excerpts from this Manual mysql_more_results()

my_bool mysql_more_results(MYSQL *mysql)


This function is used when you execute multiple statements specified as a single statement string, or when you execute CALL statements, which can return multiple result sets.

mysql_more_results() true if more results exist from the currently executed statement, in which case the application must call mysql_next_result() to fetch the results.

Return Values

TRUE (1) if more results exist. FALSE (0) if no more results exist.

In most cases, you can call mysql_next_result() instead to test whether more results exist and initiate retrieval if so.

See Section 25.8.17, “C API Support for Multiple Statement Execution”, and Section, “mysql_next_result()”.



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