public override string BuildQuerySQL(SQLServerVisitor <TextContent> visitor, out IEnumerable <Parameter> parameters)
{
var innerVisitor = new SQLServerVisitor <Models.TextContent>(visitor.Parameters);
innerVisitor.Visite(categoriesQuery.InnerQuery.Expression);
var innerExecutor = (new TextContentTranslator()).Translate(categoriesQuery.InnerQuery);
var innerQuerySQL = innerExecutor.BuildQuerySQL(innerVisitor, out parameters);
string selectClause = "*";
if (visitor.SelectFields != null && visitor.SelectFields.Length > 0)
{
selectClause = string.Join(",", visitor.SelectFields);
}
string whereClause = visitor.WhereClause;
var paraName = visitor.AppendParameter(categoriesQuery.CategoryFolder.FullName);
whereClause = whereClause + " AND FolderName=" + paraName;
string sql = string.Format(@"
SELECT {0} FROM [{1}] category
WHERE EXISTS(
SELECT ContentCategory.CategoryUUID
FROM [{2}] ContentCategory,
({3})content
WHERE content.UUID = ContentCategory.UUID AND ContentCategory.CategoryUUID = category.UUID
) AND {4}", selectClause
, categoriesQuery.CategoryFolder.GetSchema().GetTableName()
, categoriesQuery.Repository.GetCategoryTableName()
, innerQuerySQL
, whereClause);
return(sql);
}
protected virtual SqlCommand BuildCommand(SQLServerVisitor <T> visitor)
{
string whereClause = "1=1";
if (!string.IsNullOrEmpty(visitor.WhereClause))
{
whereClause = visitor.WhereClause;
}
string orderBy = "Id DESC";
if (visitor.OrderClauses != null && visitor.OrderClauses.Count() > 0)
{
orderBy = ToOrderString(visitor);
}
IEnumerable <Parameter> parameters;
string sql = BuildQuerySQL(visitor, out parameters);
if (visitor.Take != 0)
{
sql = string.Format(@"
SELECT *
FROM (
SELECT *,ROW_NUMBER() OVER(ORDER BY {0}) AS RowIndex
FROM ({1})content
)paging
WHERE (RowIndex > {2}) AND (RowIndex <= {3}) "
, orderBy
, sql
, visitor.Skip
, visitor.Skip + visitor.Take);
}
else
{
sql = sql + " ORDER BY " + orderBy;
}
return(BuildCommand(sql, parameters));
}
private IEnumerable <string> GetCategoryClause(Repository repository, IEnumerable <IContentQuery <TextContent> > categoryQueries, List <Parameter> parameters)
{
TextContentTranslator translator = new TextContentTranslator();
List <string> categoryQueryList = new List <string>();
foreach (var categoryQuery in categoryQueries)
{
var executor = translator.Translate(categoryQuery);
var categoryVisitor = new SQLServerVisitor <TextContent>(parameters);
categoryVisitor.Visite(categoryQuery.Expression);
IEnumerable <Parameter> outParameters;
var categoryQuerySQL = executor.BuildQuerySQL(categoryVisitor, out outParameters);
categoryQueryList.Add(string.Format(@"EXISTS(
SELECT ContentCategory.CategoryUUID
FROM [{0}] ContentCategory,
({1})category
WHERE content.UUID = ContentCategory.UUID AND ContentCategory.CategoryUUID = category.UUID
)", repository.GetCategoryTableName()
, categoryQuerySQL));
}
return(categoryQueryList);
}
private IEnumerable <T> List(SQLServerVisitor <T> visitor)
{
var command = BuildCommand(visitor);
SqlConnection connection;
List <T> list = new List <T>();
using (var dataReader = SQLServerHelper.ExecuteReader(ContentQuery.Repository, command, out connection))
{
try
{
while (dataReader.Read())
{
T content = new T();
list.Add(dataReader.ToContent(content));
}
}
finally
{
dataReader.Close();
connection.Close();
}
}
return(list);
}
public abstract string BuildQuerySQL(SQLServerVisitor <T> visitor, out IEnumerable <Parameter> parameters);
protected static string ChangeOrderDirectionOrderString(SQLServerVisitor <T> visitor)
{
return(string.Join(",", visitor.OrderClauses.Distinct(new OrderClauseComparer()).Select(it => "[" + it.FieldName + "] " + (it.Descending ? "ASC" : "DESC")).ToArray()));
}
