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QueryBuilderBase.cs
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50 lines (39 loc) · 1.36 KB
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using System.Linq;
using System.Text;
namespace FizzCode.DbTools.QueryBuilder;
public abstract class QueryBuilderBase
{
protected Query? _query;
protected bool HasColumnWithSameName(QueryElement queryElement, QueryColumn queryColumn)
{
var columns = queryElement.GetColumns();
if (columns is null)
return false;
return columns.Any(c => c.Value == queryColumn.Value);
}
protected string AddJoinColumns()
{
var sb = new StringBuilder();
for (var i = 0; i < _query!.Joins.Count; i++)
{
if (i == 0 && _query.QueryColumns.Count == 1 && _query.QueryColumns[0] is None)
sb.Append(AddQueryElementColumns(_query.Joins[i], true));
else
sb.AppendComma(AddQueryElementColumns(_query.Joins[i], true));
}
return sb.ToString();
}
protected string AddJoins()
{
var sb = new StringBuilder();
foreach (var join in _query!.Joins)
sb.Append(AddJoin(join));
return sb.ToString();
}
protected string AddJoinOn(JoinOn joinOn)
{
return Expression.GetExpression(joinOn.OnExpression, _query!.QueryElements, joinOn);
}
protected abstract string AddQueryElementColumns(QueryElement queryElement, bool useAlias = false);
protected abstract string AddJoin(JoinBase join);
}