/// <summary>
/// Initializes a new instance of the <see cref="MaxObsStatus"/> class.
/// </summary>
/// <param name="info">
/// The info.
/// </param>
/// <param name="writeObsFunc">
/// The write observation method.
/// </param>
public MaxObsStatus(DataRetrievalInfoSeries info, Func<DataRetrievalInfoSeries, string, string, IEnumerable<ComponentValue>, int> writeObsFunc)
{
this._info = info;
this._writeObsFunc = writeObsFunc;
this._limit = info.Limit;
var firstNObservations = info.FirstNObservations;
this._lastNObservations = info.LastNObservations;
this._lastObsQueue = new Queue<Tuple<string, string, IEnumerable<ComponentValue>>>(Math.Max(this._lastNObservations, 0));
if (info.HasFirstAndLastNObservations)
{
this._queueLastObsAction = func =>
{
var val = this.WriteOrSkip(firstNObservations, func);
if (val != 0)
{
return val;
}
this._lastObsQueue.Enqueue(func);
if (this._lastObsQueue.Count > this._lastNObservations)
{
this._lastObsQueue.Dequeue();
}
return 0;
};
}
else if (info.HasFirstNObservations)
{
this._queueLastObsAction = func => this.WriteOrSkip(firstNObservations, func);
}
else if (info.HasLastNObservations)
{
// NOTE Assume that we have "DESC".
this._queueLastObsAction = func => this.WriteOrSkip(this._lastNObservations, func);
}
else
{
this._queueLastObsAction = this.WriteObs;
}
}
/// <summary>
/// This method generates the SQL SELECT statement for the dissemination database that will return the data for the incoming Query.
/// </summary>
/// <param name="info">
/// The current state of the data retrieval which containts the current query and mapping set
/// </param>
private static void GenerateDataSetSql(DataRetrievalInfoSeries info)
{
if (!info.DataSetAttributes.Any(mapping => mapping.Mapping.Columns.Count > 0))
{
return;
}
MappingSetEntity mappingSet = info.MappingSet;
Logger.Info(Resources.InfoBeginGenerateSql);
SqlQuery sqlQuery = new SqlQuery();
try
{
// Generate Query subparts
string sql = GenerateSelect(true, ConvertToMapping(info.DataSetAttributes));
sqlQuery.appendSql(sql);
sqlQuery.appendSql(GenerateFrom(mappingSet));
if (string.IsNullOrEmpty(info.SqlWhereCache))
{
info.SqlWhereCache = GenerateWhere(info);
}
sqlQuery.appendSql(info.SqlWhereCache);
}
catch (Exception ex)
{
Logger.Error(ex.ToString());
throw new DataRetrieverException(ex,
SdmxErrorCode.GetFromEnum(SdmxErrorCodeEnumType.SemanticError),
Resources.ErrorUnableToGenerateSQL);
//ErrorTypes.QUERY_PARSING_ERROR, Resources.ErrorUnableToGenerateSQL, ex);
}
info.DataSetSqlString = sqlQuery.getSql();
// log for easy debug
Logger.Info(string.Format(CultureInfo.InvariantCulture, Resources.InfoGeneratedSQLFormat1, info.DataSetSqlString));
Logger.Info(Resources.InfoEndGenerateSql);
}
/// <summary>
/// Appends the cached where to <paramref name="sql"/> from <see cref="DataRetrievalInfoSeries.SqlWhereCache"/> if it is not null or from <see cref="SqlBuilderBase.GenerateWhere"/>
/// </summary>
/// <param name="info">
/// The current DataRetrieval state
/// </param>
/// <param name="sql">
/// The SQL String buffer to
/// </param>
private static void AppendCachedWhere(DataRetrievalInfoSeries info, SqlQuery sqq)
{
if (string.IsNullOrEmpty(info.SqlWhereCache))
{
info.SqlWhereCache = GenerateWhere(info);
}
sqq.appendSql(info.SqlWhereCache);
}
/// <summary>
/// This method generates the SQL SELECT statement for the dissemination database that will return the data for the incoming Query.
/// </summary>
/// <param name="groupBean">
/// The group Bean.
/// </param>
/// <param name="info">
/// The current data retrieval state
/// </param>
/// <returns>
/// The string containing the SQL query that needs to be executed on the dissemination database, in order to return the data required by the input query
/// </returns>
private static string GenerateGroupSql(GroupInformation groupBean, DataRetrievalInfoSeries info)
{
MappingSetEntity mappingSet = info.MappingSet;
Logger.Info(Resources.InfoBeginGenerateSql);
SqlQuery sqlQuery = new SqlQuery();
string sql = string.Empty;
try
{
// Generate Query subparts
sql = GenerateSelect(true, ConvertToMapping(groupBean.ComponentMappings));
sqlQuery.appendSql(sql);
sqlQuery.appendSql(GenerateFrom(mappingSet));
if (string.IsNullOrEmpty(info.SqlWhereCache))
{
info.SqlWhereCache = GenerateWhere(info);
}
sqlQuery.appendSql(info.SqlWhereCache);
// In SDMX Group we don't care if it is flat or not.
sqlQuery.appendSql(GenerateOrderBy(info, groupBean.ThisGroup.Dimensions));
}
catch (Exception ex)
{
Logger.Error(ex.ToString());
throw new DataRetrieverException(ex,
SdmxErrorCode.GetFromEnum(SdmxErrorCodeEnumType.SemanticError),
Resources.ErrorUnableToGenerateSQL);
//ErrorTypes.QUERY_PARSING_ERROR, Resources.ErrorUnableToGenerateSQL, ex);
}
// log for easy debug
Logger.Info(string.Format(CultureInfo.InvariantCulture, Resources.InfoGeneratedSQLFormat1, sql));
Logger.Info(Resources.InfoEndGenerateSql);
return sqlQuery.getSql();
}
/// <summary>
/// This method generates the SQL SELECT statement for the dissemination database that will return the data for the incoming Query.
/// </summary>
/// <param name="groupBean">
/// The group Bean.
/// </param>
/// <param name="info">
/// The current data retrieval state
/// </param>
/// <returns>
/// The string containing the SQL query that needs to be executed on the dissemination database, in order to return the data required by the input query
/// </returns>
private static string GenerateGroupSql(GroupInformation groupBean, DataRetrievalInfoSeries info)
{
MappingSetEntity mappingSet = info.MappingSet;
Logger.Info(Resources.InfoBeginGenerateSql);
SqlQuery sqlQuery = new SqlQuery();
string sql = string.Empty;
try
{
// Generate Query subparts
sql = GenerateSelect(true, ConvertToMapping(groupBean.ComponentMappings));
sqlQuery.appendSql(sql);
sqlQuery.appendSql(GenerateFrom(mappingSet));
if (string.IsNullOrEmpty(info.SqlWhereCache))
{
info.SqlWhereCache = GenerateWhere(info);
}
sqlQuery.appendSql(info.SqlWhereCache);
bool bFlat = false;
var allDimensions = DimensionAtObservation.GetFromEnum(DimensionAtObservationEnumType.All).Value;
IBaseDataQuery baseDataQuery = (IBaseDataQuery)info.ComplexQuery ?? info.Query;
//the Flat option will be read only when we have flat aka AllDimensions
if (baseDataQuery.DimensionAtObservation.Equals(allDimensions))
Boolean.TryParse(ConfigurationManager.AppSettings["QueryFlatFormat"], out bFlat);
if (!bFlat)
sqlQuery.appendSql(GenerateOrderBy(info, groupBean.ThisGroup.Dimensions));
}
catch (Exception ex)
{
Logger.Error(ex.ToString());
throw new DataRetrieverException(ex,
SdmxErrorCode.GetFromEnum(SdmxErrorCodeEnumType.SemanticError),
Resources.ErrorUnableToGenerateSQL);
//ErrorTypes.QUERY_PARSING_ERROR, Resources.ErrorUnableToGenerateSQL, ex);
}
// log for easy debug
Logger.Info(string.Format(CultureInfo.InvariantCulture, Resources.InfoGeneratedSQLFormat1, sql));
Logger.Info(Resources.InfoEndGenerateSql);
return sqlQuery.getSql();
}
