Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Reads metadata for subsequent resultsets in a multi-resultset operation.
template<
class ExecutionStateType>
void
read_resultset_head(
ExecutionStateType& st,
error_code& err,
diagnostics& diag);
If st.should_read_head()
== true,
this function will read the next resultset's initial response message
and metadata, if any. If the resultset indicates a failure (e.g. the
query associated to this resultset contained an error), this function
will fail with that error.
If st.should_read_head()
== false,
this function is a no-op.
stmay be either an execution_state
or static_execution_state object.
This function is only relevant when using multi-function operations with statements that return more than one resultset.
When using the static interface, this function will detect schema mismatches
for the resultset currently being read. Further errors may be detected
by subsequent invocations of this function and by read_some_rows.