DbQuery class

Represents query for building SQL command

public class Korzh.EasyQuery.Db.DbQuery
    : Query

Package: Korzh.EasyQuery.Db (targets: netstandard2.0)

Assembly: Korzh.EasyQuery.Db.dll


Name Type Description
DbQuery(DataModel model, Query parentQuery) void Initializes a new instance of the Korzh.EasyQuery.Db.DbQuery class.
DbQuery(DataModel model) void Initializes a new instance of the Korzh.EasyQuery.Db.DbQuery class.


Name Type Description
ExtraTables TableList Gets the list of "extra" tables (the tables which will be included into result query by user request).
NoPathResolution NoPathResolution Get or set the type of reaction for the situation when two tables have no path between them
Options SqlExtras Gets the Korzh.EasyQuery.Db.SqlExtras object which defines some extra clauses of generated query.
ResultColumns IEnumerable<QueryColumn> Gets the full list of columns which will be returned in result query. It equals to Columns list if it's not empty. Otherwise - it's an array of all fields from all tables taking part in this query (like SELECT * in SQL).


Name Type Description
CheckModelObject(DataModel model) void Checks if model object has appropriate type and raise exception if not
CoreClear() void Clears all query content. Can be overriden in derived classes.
CreateColumn(IColumnDescriptor& modreq(System.Runtime.InteropServices.InAttribute) desc) QueryColumn Creates a column by its descriptor
CreateParentEntityAttrExpr(EntityAttr attr) EntityAttrExpr Creates the parent entity attribute expression.
CreateQueryExpr() EqExpression Creates a sub-query expression.
CreateSubQuery() Query Creates the subquery.
GetParentQueryRootEntity() Entity Gets the entities from parent query.
GetUsedEntities() List<Entity> Gets the list of used entities.
GetUsedTables() TableList Gets the used tables.
LoadNode(XmlReader reader, BitOptions rwOptions) void Loads the root node.
NewModel() DataModel Creates a new model (an object of DataModel class or its descendant).
ReadOnePropFromJsonAsync(JsonReader reader, string propName, BitOptions rwOptions) Task Reads the property from JSON reader or skip unused (asynchronous way).
SaveNodes(XmlWriter writer, BitOptions rwOptions) void Saves the root nodes.
WritePropertiesToJsonAsync(JsonWriter writer, BitOptions rwOptions) Task Saves content of the query to JSON (asynchronous way).