/// <summary>
/// Gets a command text from the cache for the query table function operation.
/// </summary>
/// <param name="request">The request object.</param>
/// <returns>The cached command text.</returns>
internal static string GetQueryAllTableFuncText(QueryAllTableFuncRequest request)
{
var commandText = (string)null;
if (m_cache.TryGetValue(request, out commandText) == false)
{
var statementBuilder = EnsureStatementBuilder(request.Connection, request.StatementBuilder);
var fields = GetActualFields(request.Connection, request.Name, request.Fields, request.Transaction);
commandText = statementBuilder.CreateTableFuncQueryAll(new QueryBuilder(),
request.Name,
request.Parameters,
fields,
request.OrderBy,
request.Hints);
m_cache.TryAdd(request, commandText);
}
return(commandText);
}
/// <summary>
/// Queries a data from the database table function in an asynchronous way.
/// </summary>
/// <typeparam name="TEntity">The type of the data entity object.</typeparam>
/// <param name="connection">The connection object to be used.</param>
/// <param name="funcName">Function name.</param>
/// <param name="parameters">Collection of function parameters.</param>
/// <param name="fields">The list of fields to be queried.</param>
/// <param name="orderBy">The order definition of the fields to be used.</param>
/// <param name="hints">The table hints to be used.</param>
/// <param name="cacheKey">
/// The key to the cache. If the cache key is present in the cache, then the item from the cache will be returned instead. Setting this
/// to null would force to query from the database.
/// </param>
/// <param name="cacheItemExpiration">The expiration in minutes of the cache item.</param>
/// <param name="commandTimeout">The command timeout in seconds to be used.</param>
/// <param name="transaction">The transaction to be used.</param>
/// <param name="cache">The cache object to be used.</param>
/// <param name="trace">The trace object to be used.</param>
/// <param name="statementBuilder">The statement builder object to be used.</param>
/// <returns>An enumerable list of data entity object.</returns>
internal static async Task <IEnumerable <TEntity> > QueryAllTableFuncAsyncInternalBase <TEntity>(this IDbConnection connection,
string funcName,
IEnumerable <QueryField> parameters = null,
IEnumerable <Field> fields = null,
IEnumerable <OrderField> orderBy = null,
string hints = null,
string cacheKey = null,
int cacheItemExpiration = Constant.DefaultCacheItemExpirationInMinutes,
int?commandTimeout = null,
IDbTransaction transaction = null,
ICache cache = null,
ITrace trace = null,
IStatementBuilder statementBuilder = null)
where TEntity : class
{
// Get Cache
if (cacheKey != null)
{
var item = cache?.Get(cacheKey, false);
if (item != null)
{
return((IEnumerable <TEntity>)item.Value);
}
}
// Variables
var commandType = CommandType.Text;
var request = new QueryAllTableFuncRequest(typeof(TEntity),
funcName,
connection,
transaction,
parameters?.GetFields(),
fields,
orderBy,
hints,
statementBuilder);
var commandText = CommandTextCache.GetQueryAllTableFuncText(request);
var param = (object)null;
if (parameters != null)
{
param = parameters.AsObject();
}
// Before Execution
if (trace != null)
{
var cancellableTraceLog = new CancellableTraceLog(commandText, param, null);
trace.BeforeQuery(cancellableTraceLog);
if (cancellableTraceLog.IsCancelled)
{
if (cancellableTraceLog.IsThrowException)
{
throw new CancelledExecutionException(commandText);
}
return(null);
}
commandText = (cancellableTraceLog.Statement ?? commandText);
param = (cancellableTraceLog.Parameter ?? param);
}
// Before Execution Time
var beforeExecutionTime = DateTime.UtcNow;
// Actual Execution
var result = await ExecuteQueryAsyncInternal <TEntity>(connection : connection,
commandText : commandText,
param : param,
commandType : commandType,
commandTimeout : commandTimeout,
transaction : transaction,
skipCommandArrayParametersCheck : true);
// After Execution
if (trace != null)
{
trace.AfterQuery(new TraceLog(commandText, param, result,
DateTime.UtcNow.Subtract(beforeExecutionTime)));
}
// Set Cache
if (cacheKey != null)
{
cache?.Add(cacheKey, result, cacheItemExpiration, false);
}
// Result
return(result);
}
