/// <summary>
/// Prepares the statement if the <see cref="IQueryRequest"/> is not ad-hoc and caches it for reuse.asynchronously.
/// </summary>
/// <param name="originalRequest">The original query request.</param>
async Task PrepareStatementIfNotAdHocAsync(IQueryRequest originalRequest)
{
if (originalRequest.IsAdHoc)
{
return;
}
var statement = originalRequest.GetStatement();
if (statement == null)
{
statement = originalRequest.GetPreparedPayload().Text;
}
QueryPlan queryPlan;
if (_queryCache.TryGetValue(statement, out queryPlan))
{
originalRequest.Prepared(queryPlan);
}
else
{
var result = await PrepareAsync(originalRequest);
if (!result.Success)
{
return; //FIXME propagate the error somehow
}
queryPlan = result.Rows.First();
queryPlan.Text = originalRequest.GetStatement();
if (_queryCache.TryAdd(statement, queryPlan))
{
originalRequest.Prepared(queryPlan);
}
}
}
/// <summary>
/// Prepares the statement if the <see cref="IQueryRequest"/> is not ad-hoc and caches it for reuse.
/// </summary>
/// <param name="originalRequest">The original query request.</param>
void PrepareStatementIfNotAdHoc(IQueryRequest originalRequest)
{
if (originalRequest.IsAdHoc)
{
return;
}
var statement = originalRequest.GetStatement();
if (statement == null)
{
statement = originalRequest.GetPreparedPayload().Text;
}
QueryPlan queryPlan;
if (_queryCache.TryGetValue(statement, out queryPlan))
{
originalRequest.Prepared(queryPlan);
}
else
{
var result = Prepare(originalRequest);
//FIXME throw an exception?
if (!result.Success)
{
return;
}
queryPlan = result.Rows.First();
queryPlan.Text = originalRequest.GetStatement(); //the plan Text will be used if we reprepare it
if (_queryCache.TryAdd(statement, queryPlan))
{
originalRequest.Prepared(queryPlan);
}
}
}
/// <summary>
/// Prepare an ad-hoc N1QL statement for later execution against a Couchbase Server.
/// </summary>
/// <param name="toPrepare">The <see cref="IQueryRequest" /> containing a N1QL statement to be prepared.</param>
/// <returns>
/// A <see cref="IQueryResult{T}" /> containing the <see cref="IQueryPlan" /> representing the reusable
/// and cachable execution plan for the statement.
/// </returns>
/// <remarks>
/// Most parameters in the IQueryRequest will be ignored, appart from the Statement and the BaseUri.
/// </remarks>
public IQueryResult <IQueryPlan> Prepare(IQueryRequest toPrepare)
{
string statement = toPrepare.GetStatement();
if (!statement.ToUpper().StartsWith("PREPARE "))
{
statement = string.Concat("PREPARE ", statement);
}
QueryRequest query = new QueryRequest(statement);
query.BaseUri(toPrepare.GetBaseUri());
IQueryResult <dynamic> planResult = Query <dynamic>(query);
IQueryResult <IQueryPlan> result = new QueryResult <IQueryPlan>()
{
Message = planResult.Message,
ClientContextId = planResult.ClientContextId,
Errors = planResult.Errors,
Exception = planResult.Exception,
Metrics = planResult.Metrics,
RequestId = planResult.RequestId,
Signature = planResult.Signature,
Status = planResult.Status,
Rows = new List <IQueryPlan>(1),
Success = planResult.Success
};
if (planResult.Success)
{
var rawPlan = planResult.Rows.First();
string encodedPlan = EncodeParameter(rawPlan);
result.Rows.Add(new QueryPlan(encodedPlan));
}
return(result);
}
/// <summary>
/// Prepare an ad-hoc N1QL statement for later execution against a Couchbase Server.
/// </summary>
/// <param name="toPrepare">The <see cref="IQueryRequest" /> containing a N1QL statement to be prepared.</param>
/// <returns>
/// A <see cref="IQueryResult{T}" /> containing the <see cref="QueryPlan" /> representing the reusable
/// and cachable execution plan for the statement.
/// </returns>
/// <remarks>
/// Most parameters in the IQueryRequest will be ignored, appart from the Statement and the BaseUri.
/// </remarks>
public IQueryResult <QueryPlan> Prepare(IQueryRequest toPrepare)
{
var statement = toPrepare.GetStatement();
if (!statement.ToUpper().StartsWith("PREPARE "))
{
statement = string.Concat("PREPARE ", statement);
}
var query = new QueryRequest(statement);
query.BaseUri(toPrepare.GetBaseUri());
return(ExecuteQuery <QueryPlan>(query));
}
