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Class ProfileQueryResult (2.30.0)
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Version 2.30.0 keyboard_arrow_down
This is a range defined by the Input Iterators returned from its begin()
and end()
members. Callers may directly iterate the ProfileQueryResult
instance, which will return a sequence of StatusOr
<
Row
>
objects.
For convenience, callers may wrap instances in a StreamOf<std::tuple<...>>
object, which will automatically parse each Row
into a std::tuple
with the specified types.
Example:
namespace spanner = ::google::cloud::spanner;
spanner::SqlStatement select(
"SELECT AlbumId, AlbumTitle, MarketingBudget"
" FROM Albums"
" WHERE AlbumTitle >= 'Aardvark' AND AlbumTitle < 'Goo'");
auto profile_query_result = client.ProfileQuery(std::move(select));
for (auto& row : profile_query_result) {
if (!row) throw std::move(row).status();
// Discard rows for brevity in this example.
}
// Stats are only available after all rows from the result have been read.
auto execution_stats = profile_query_result.ExecutionStats();
if (execution_stats) {
for (auto const& stat : *execution_stats) {
std::cout << stat.first << ":\t" << stat.second << "\n";
}
}
Constructors
ProfileQueryResult()
ProfileQueryResult(std::unique_ptr< ResultSourceInterface >)
Parameter
Name
Description
source
std::unique_ptr< ResultSourceInterface >
ProfileQueryResult(ProfileQueryResult &&)
Parameter
Name
Description
ProfileQueryResult &&
Operators
operator=(ProfileQueryResult &&)
Parameter
Name
Description
ProfileQueryResult &&
Returns
Type
Description
ProfileQueryResult &
Functions
begin()
Returns
Type
Description
RowStreamIterator
end()
Returns
Type
Description
RowStreamIterator
ReadTimestamp() const
Retrieves the timestamp at which the read occurred.
Note:
Only available if a read-only transaction was used.
Returns
Type
Description
absl::optional< Timestamp >
ExecutionStats() const
Returns a collection of key value pair statistics for the SQL statement execution.
Note:
Only available when the statement is executed and all results have been read.
Returns
Type
Description
absl::optional< std::unordered_map< std::string, std::string > >
ExecutionPlan() const
Returns the plan of execution for the SQL statement.
Returns
Type
Description
absl::optional< spanner::ExecutionPlan >
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Last updated 2024-10-04 UTC.
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{"lastModified": "Last updated 2024-10-04 UTC."}
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