Search column names and tables - linqpad

Question

Is there any way to search your database for column names or tables in linqpad. Im looking for a similar feature that you can get in SSMS through red gates sql search.

Answer 1

You can get the table and column names from the Linq mapping. The following should dump out the table and column names.
var columns =
(from t in this.Mapping.GetTables()
from dm in t.RowType.DataMembers
where dm.DbType != null
select new
{
TableName = t.RowType.Name ,
TableSqlName = t.TableName,
dm.DbType,
ColumnName = dm.Name,
dm.IsPrimaryKey,
ColumnSqlName = dm.MappedName
}
);
columns.Dump();
So it should be straightforward to filter this query.

Answer 2

If you enable system tables under properties for your connection you can use a query like this (this is for MS SQL but you can probably adapt it to others)
void Main()
{
var text = "ThingToFind";
SearchColumns(text).Dump("Columns: " + text);
SearchModules(text).Dump("Modules: " + text);
}
#region
IEnumerable<dynamic> SearchColumns(string text)
{
return sys
.columns
.Join(sys.objects, o => o.object_id, i => i.object_id, (o, i) => new { Object = i, Column = o })
.Join(sys.types, o => o.Column.user_type_id, i => i.user_type_id, (o, i) => new { o.Column, o.Object, Type = i })
.Where(c => c.Object.type_desc != "INTERNAL_TABLE")
.Where(c => c.Object.type_desc != "SYSTEM_TABLE")
.OrderBy(c => c.Object.type)
.ThenBy(c => c.Object.name)
.Select(c => new { c.Object, c.Column, c.Type, Default = c.Column.default_object_id != 0 ? sys.default_constraints.Single(d => d.object_id == c.Column.default_object_id).definition : null })
.Select(c => new { Table_Type = c.Object.type_desc, Table = c.Object.name, Name = c.Column.name, Type = c.Type.name, Length = c.Column.max_length, Precision = c.Column.precision, Scale = c.Column.scale, Nullable = c.Column.is_nullable, c.Default })
.AsEnumerable()
.Where(c => c.Name.ContainsIgnoreCase(text));
}
IEnumerable<dynamic> SearchModules(string text, bool findRelatedModules = false)
{
var modules = sys
.sql_modules
.AsEnumerable()
.Join(sys.objects, o => o.object_id, i => i.object_id, (o, i) => new { i.name, definition = o.definition.Trim() })
.ToList();
var result = modules
.Where(m => m.name.ContainsIgnoreCase(text) || m.definition.ContainsIgnoreCase(text))
.ToList();
while (findRelatedModules)
{
var add = result
.SelectMany(r => r.definition.Split(" \t\n\r!##$%^&*()-=+[]{};':\",.<>/?\\|`~".ToCharArray(), StringSplitOptions.RemoveEmptyEntries))
.Distinct()
.Where(token => modules.Any(m => m.name.ToLower() == token.ToLower()))
.Where(token => !result.Any(m => m.name.ToLower() == token.ToLower()))
.ToList();
result.AddRange(add.Select(a => modules.Single(m => m.name.ToLower() == a.ToLower())));
findRelatedModules = add.Any();
}
result
.Where(m => !m.definition.ContainsIgnoreCase(m.name))
.Dump("Renamed Modules");
return result.OrderBy(r => r.name);
}
#endregion
public static class StringExtensions
{
public static bool ContainsIgnoreCase(this string source, string toCheck, bool bCaseInsensitive )
{
return source.IndexOf(toCheck, bCaseInsensitive ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal) >= 0;
}
}