/// <summary>
/// Creates a new Insert Query object which is ready to use.
/// </summary>
/// <param name="fields">Array of EntityFieldCore objects to use to build the insert query</param>
/// <param name="fieldsPersistenceInfo">Array of IFieldPersistenceInfo objects to use to build the insert query</param>
/// <param name="query">The query object to fill.</param>
/// <param name="fieldToParameter">Hashtable which will contain after the call for each field the parameter which contains or will contain the field's value.</param>
/// <remarks>Generic version.</remarks>
/// <exception cref="System.ArgumentNullException">When fields is null or fieldsPersistenceInfo is null</exception>
/// <exception cref="System.ArgumentException">When fields contains no EntityFieldCore instances or fieldsPersistenceInfo is empty.</exception>
/// <exception cref="ORMQueryConstructionException">When there are no fields to insert in the fields list. This exception is to prevent
/// INSERT INTO table () VALUES () style queries.</exception>
protected override void CreateSingleTargetInsertDQ(IEntityFieldCore[] fields, IFieldPersistenceInfo[] fieldsPersistenceInfo,
IActionQuery query, Dictionary <IEntityFieldCore, DbParameter> fieldToParameter)
{
TraceHelper.WriteLineIf(Switch.TraceInfo, "CreateSingleTargetInsertDQ", "Method Enter");
QueryFragments fragments = new QueryFragments();
fragments.AddFormatted("INSERT INTO {0}", this.Creator.CreateObjectName(fieldsPersistenceInfo[0]));
DelimitedStringList fieldNames = fragments.AddCommaFragmentList(true);
fragments.AddFragment("VALUES");
DelimitedStringList valueFragments = fragments.AddCommaFragmentList(true);
DbParameter newParameter;
bool hasIdentity = false;
for (int i = 0; i < fields.Length; i++)
{
IEntityFieldCore field = fields[i];
IFieldPersistenceInfo persistenceInfo = fieldsPersistenceInfo[i];
if (string.IsNullOrEmpty(persistenceInfo.IdentityValueSequenceName))
{
if (!CheckIfFieldNeedsInsertAction(field))
{
continue;
}
fieldNames.Add(this.Creator.CreateFieldNameSimple(persistenceInfo, field.Name));
AppendFieldToValueFragmentsForInsert(query, fieldToParameter, valueFragments, field, persistenceInfo);
}
else
{
newParameter = this.Creator.CreateParameter(field, persistenceInfo, ParameterDirection.InputOutput);
query.AddParameterFieldRelation(field, newParameter, persistenceInfo.TypeConverterToUse, parameterValueCanBeNull: false);
query.AddSequenceRetrievalQuery(CreateCommand("SELECT @@IDENTITY", query.Connection), false).AddSequenceParameter(newParameter);
hasIdentity = true;
fieldToParameter.Add(field, newParameter);
}
}
if (fieldNames.Count <= 0)
{
if (hasIdentity)
{
// a table with just 1 identity field, use a special case query: INSERT INTO table values ()
fieldNames.Clear();
valueFragments.Clear();
fragments.AddFragment("()");
}
else
{
throw new ORMQueryConstructionException("The insert query doesn't contain any fields.");
}
}
query.SetCommandText(MakeParametersAnonymous(fragments.ToString(), query.Parameters));
TraceHelper.WriteIf(Switch.TraceVerbose, query, "Generated Sql query");
TraceHelper.WriteLineIf(Switch.TraceInfo, "CreateSingleTargetInsertDQ", "Method Exit");
}
/// <summary>
/// Creates a new Select Query which is ready to use, based on the specified select list and the specified set of relations.
/// If selectFilter is set to null, all rows are selected.
/// </summary>
/// <param name="selectList">list of IEntityFieldCore objects to select</param>
/// <param name="fieldsPersistenceInfo">Array of IFieldPersistenceInfo objects to use to build the select query</param>
/// <param name="query">The query to fill.</param>
/// <param name="selectFilter">A complete IPredicate implementing object which contains the filter for the rows to select. When set to null, no
/// filtering is done, and all rows are returned.</param>
/// <param name="maxNumberOfItemsToReturn">The maximum number of items to return with this retrieval query.
/// If the used Dynamic Query Engine supports it, 'TOP' is used to limit the amount of rows to return.
/// When set to 0, no limitations are specified.</param>
/// <param name="sortClauses">The order by specifications for the sorting of the resultset. When not specified, no sorting is applied.</param>
/// <param name="relationsToWalk">list of EntityRelation objects, which will be used to formulate a FROM clause with INNER JOINs.</param>
/// <param name="allowDuplicates">Flag which forces the inclusion of DISTINCT if set to true. If the resultset contains fields of type ntext, text or image, no duplicate filtering
/// is done.</param>
/// <param name="groupByClause">The list of fields to group by on. When not specified or an empty collection is specified, no group by clause
/// is added to the query. A check is performed for each field in the selectList. If a field in the selectList is not present in the groupByClause
/// collection, an exception is thrown.</param>
/// <param name="relationsSpecified">flag to signal if relations are specified, this is a result of a check. This routine should
/// simply assume the value of this flag is correct.</param>
/// <param name="sortClausesSpecified">flag to signal if sortClauses are specified, this is a result of a check. This routine should
/// simply assume the value of this flag is correct.</param>
/// <exception cref="System.ArgumentNullException">When selectList is null or fieldsPersistenceInfo is null</exception>
/// <exception cref="System.ArgumentException">When selectList contains no EntityFieldCore instances or fieldsPersistenceInfo is empty.</exception>
protected override void CreateSelectDQ(IEntityFieldCore[] selectList, IFieldPersistenceInfo[] fieldsPersistenceInfo,
IRetrievalQuery query, IPredicate selectFilter, long maxNumberOfItemsToReturn, ISortExpression sortClauses,
IRelationCollection relationsToWalk, bool allowDuplicates, IGroupByCollection groupByClause,
bool relationsSpecified, bool sortClausesSpecified)
{
TraceHelper.WriteLineIf(Switch.TraceInfo, "CreateSelectDQ", "Method Enter");
QueryFragments fragments = new QueryFragments();
fragments.AddFragment("SELECT");
StringPlaceHolder distinctPlaceholder = fragments.AddPlaceHolder();
StringPlaceHolder topPlaceholder = fragments.AddPlaceHolder();
DelimitedStringList projection = fragments.AddCommaFragmentList(false);
UniqueList <string> fieldNamesInSelectList;
bool distinctViolatingTypesFound;
bool pkFieldSeen;
AppendResultsetFields(selectList, fieldsPersistenceInfo, relationsToWalk, projection, sortClausesSpecified, allowDuplicates, true, new UniqueList <string>(),
query, out fieldNamesInSelectList, out distinctViolatingTypesFound, out pkFieldSeen);
bool resultsCouldContainDuplicates = this.DetermineIfDuplicatesWillOccur(relationsToWalk);
bool distinctEmitted = this.HandleDistinctEmit(sortClauses, allowDuplicates, sortClausesSpecified, query, distinctPlaceholder, distinctViolatingTypesFound,
(pkFieldSeen && !resultsCouldContainDuplicates), fieldNamesInSelectList);
bool groupByClauseSpecified = ((groupByClause != null) && (groupByClause.Count > 0));
if (maxNumberOfItemsToReturn > 0)
{
// row limits are emitted always, unless duplicates are required but DISTINCT wasn't emitable. If not emitable, switch to client-side row limitation
if (distinctEmitted || !resultsCouldContainDuplicates || groupByClauseSpecified || allowDuplicates)
{
topPlaceholder.SetFormatted("TOP {0}", maxNumberOfItemsToReturn);
}
else
{
query.RequiresClientSideLimitation = true;
query.ManualRowsToTake = (int)maxNumberOfItemsToReturn;
}
}
if (relationsSpecified)
{
fragments.AddFormatted("FROM {0}", relationsToWalk.ToQueryText());
query.AddParameters(((RelationCollection)relationsToWalk).CustomFilterParameters);
}
else
{
var persistenceInfoToUse = fieldsPersistenceInfo.FirstOrDefault(p => p != null);
if ((persistenceInfoToUse != null) && (persistenceInfoToUse.SourceObjectName.Length > 0))
{
fragments.AddFormatted(" FROM {0}", this.Creator.CreateObjectName(persistenceInfoToUse));
string targetAlias = this.DetermineTargetAlias(selectList[0], relationsToWalk);
if (targetAlias.Length > 0)
{
fragments.AddFormatted(" {0}", this.Creator.CreateValidAlias(targetAlias));
}
}
}
AppendWhereClause(selectFilter, fragments, query);
AppendGroupByClause(groupByClause, fragments, query);
AppendOrderByClause(sortClauses, fragments, query);
query.SetCommandText(MakeParametersAnonymous(fragments.ToString(), query.Parameters));
TraceHelper.WriteIf(Switch.TraceVerbose, query, "Generated Sql query");
TraceHelper.WriteLineIf(Switch.TraceInfo, "CreateSelectDQ", "Method Exit");
}