spec_meta_has_completed
Value
dbHasCompleted() returns a logical scalar.
For a query initiated by dbSendQuery() with non-empty result set,
dbHasCompleted() returns FALSE initially
and TRUE after calling dbFetch() without limit.
For a query initiated by dbSendStatement(),
dbHasCompleted() always returns TRUE.
Failure modes
Attempting to query completion status for a result set cleared with
dbClearResult() gives an error.
Specification
The completion status for a query is only guaranteed to be set to
FALSE after attempting to fetch past the end of the entire result.
Therefore, for a query with an empty result set,
the initial return value is unspecified,
but the result value is TRUE after trying to fetch only one row.
Similarly, for a query with a result set of length n,
the return value is unspecified after fetching n rows,
but the result value is TRUE after trying to fetch only one more
row.
See also
Other meta specifications:
spec_get_info,
spec_meta_bind,
spec_meta_column_info,
spec_meta_get_row_count,
spec_meta_get_rows_affected,
spec_meta_get_statement,
spec_meta_is_valid