/// <summary>
/// Produces insert from subquery
/// </summary>
/// <param name="columns"></param>
/// <param name="query"></param>
/// <returns></returns>
public Query AsInsert(IEnumerable <string> columns, Query query)
{
Method = "insert";
ClearComponent("insert").AddComponent("insert", new InsertQueryClause
{
Columns = columns.ToList(),
Query = query.Clone(),
});
return(this);
}
public override AbstractClause Clone()
{
return(new InQueryCondition
{
Engine = Engine,
Column = Column,
Query = Query.Clone(),
IsOr = IsOr,
IsNot = IsNot,
Component = Component,
});
}
public Query Select(Query query, string alias)
{
Method = "select";
query = query.Clone();
AddComponent("select", new QueryColumn
{
Query = query.As(alias),
});
return(this);
}
public Q From(Query query, string alias = null)
{
query = query.Clone();
query.SetParent((Q)this);
if (alias != null)
{
query.As(alias);
}
;
return(AddOrReplaceComponent("from", new QueryFromClause
{
Query = query
}));
}
public Q WhereExists(Query query)
{
if (!query.HasComponent("from"))
{
throw new ArgumentException("'FromClause' cannot be empty if used inside a 'WhereExists' condition");
}
// remove unneeded components
query = query.Clone().ClearComponent("select")
.SelectRaw("1");
return(AddComponent("where", new ExistsCondition
{
Query = query,
IsNot = GetNot(),
IsOr = GetOr(),
}));
}
public Query HavingExists(Query query)
{
if (!query.HasComponent("from"))
{
throw new ArgumentException("'FromClause' cannot be empty if used inside a 'HavingExists' condition");
}
// simplify the query as much as possible
query = query.Clone().ClearComponent("select")
.SelectRaw("1")
.Limit(1);
return(AddComponent("having", new ExistsCondition
{
Query = query,
IsNot = GetNot(),
IsOr = GetOr(),
}));
}
