public static void PopulateDatabase(ResourceManager resourceManager, StatusCallback callback)
{
// Lock on this class rather than the cacheResults. Tile requests are not
// blocked but we don't index twice.
lock (typeof(SearchEngine))
{
// NOTE: This (re)initializes a static data structure used for
// resolving names into sector locations, so needs to be run
// before any other objects (e.g. Worlds) are loaded.
SectorMap map = SectorMap.FromName(SectorMap.DefaultSetting, resourceManager);
using (var connection = DBUtil.MakeConnection())
{
SqlCommand sqlCommand;
//
// Repopulate the tables - locally first
// FUTURE: will need to batch this up rather than keep it in memory!
//
DataTable dt_sectors = new DataTable();
for (int i = 0; i < 3; ++i)
{
dt_sectors.Columns.Add(new DataColumn());
}
DataTable dt_subsectors = new DataTable();
for (int i = 0; i < 4; ++i)
{
dt_subsectors.Columns.Add(new DataColumn());
}
DataTable dt_worlds = new DataTable();
for (int i = 0; i < 6; ++i)
{
dt_worlds.Columns.Add(new DataColumn());
}
callback("Parsing data...");
foreach (Sector sector in map.Sectors)
{
if (!sector.Tags.Contains("OTU"))
{
continue;
}
foreach (Name name in sector.Names)
{
DataRow row = dt_sectors.NewRow();
row.ItemArray = new object[] { sector.X, sector.Y, name.Text };
dt_sectors.Rows.Add(row);
}
foreach (Subsector subsector in sector.Subsectors)
{
DataRow row = dt_subsectors.NewRow();
row.ItemArray = new object[] { sector.X, sector.Y, subsector.Index, subsector.Name };
dt_subsectors.Rows.Add(row);
}
#if DEBUG
if (!sector.Selected)
{
continue;
}
#endif
// NOTE: May need to page this at some point
WorldCollection worlds = sector.GetWorlds(resourceManager, cacheResults: false);
if (worlds == null)
{
continue;
}
foreach (World world in worlds)
{
DataRow row = dt_worlds.NewRow();
row.ItemArray = new object[] {
sector.X,
sector.Y,
world.X,
world.Y,
world.Name != null && world.Name.Length > 0
? (object)world.Name
: (object)DBNull.Value,
world.UWP
};
dt_worlds.Rows.Add(row);
}
}
//
// Rebuild the tables with fresh schema
//
string[] rebuild_schema =
{
"IF EXISTS(SELECT 1 FROM sys.objects WHERE OBJECT_ID = OBJECT_ID(N'sectors') AND type = (N'U')) DROP TABLE sectors",
"CREATE TABLE sectors(x int NOT NULL,y int NOT NULL,name nvarchar(50) NULL)",
"CREATE NONCLUSTERED INDEX sector_name ON sectors ( name ASC ) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)",
"IF EXISTS(SELECT 1 FROM sys.objects WHERE OBJECT_ID = OBJECT_ID(N'subsectors') AND type = (N'U')) DROP TABLE subsectors",
"CREATE TABLE subsectors (sector_x int NOT NULL, sector_y int NOT NULL, subsector_index char(1) NOT NULL, name nvarchar(50) NULL )",
"CREATE NONCLUSTERED INDEX subsector_name ON subsectors ( name ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)",
"IF EXISTS(SELECT 1 FROM sys.objects WHERE OBJECT_ID = OBJECT_ID(N'worlds') AND type = (N'U')) DROP TABLE worlds",
"CREATE TABLE worlds( sector_x int NOT NULL, sector_y int NOT NULL, hex_x int NOT NULL, hex_y int NOT NULL, name nvarchar(50) NULL, uwp nchar(9) NULL )",
"CREATE NONCLUSTERED INDEX world_name ON worlds ( name ASC ) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)",
"CREATE NONCLUSTERED INDEX world_uwp ON worlds ( uwp ASC ) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)",
};
callback("Rebuilding schema...");
foreach (string cmd in rebuild_schema)
{
sqlCommand = new SqlCommand(cmd, connection);
sqlCommand.ExecuteNonQuery();
}
//
// And shovel the data into the database en masse
//
using (var bulk = new SqlBulkCopy(connection, SqlBulkCopyOptions.TableLock, null))
{
callback(String.Format("Writing {0} sectors...", dt_sectors.Rows.Count));
bulk.BatchSize = dt_sectors.Rows.Count;
bulk.DestinationTableName = "sectors";
bulk.WriteToServer(dt_sectors);
bulk.Close();
}
using (var bulk = new SqlBulkCopy(connection, SqlBulkCopyOptions.TableLock, null))
{
callback(String.Format("Writing {0} subsectors...", dt_subsectors.Rows.Count));
bulk.BatchSize = dt_subsectors.Rows.Count;
bulk.DestinationTableName = "subsectors";
bulk.WriteToServer(dt_subsectors);
bulk.Close();
}
using (var bulk = new SqlBulkCopy(connection, SqlBulkCopyOptions.TableLock, null))
{
callback(String.Format("Writing {0} worlds...", dt_worlds.Rows.Count));
bulk.BatchSize = 4096;
bulk.DestinationTableName = "worlds";
bulk.WriteToServer(dt_worlds);
bulk.Close();
}
}
callback("Complete!");
}
}
public static IEnumerable <ItemLocation> PerformSearch(string query, ResourceManager resourceManager, SearchResultsType types, int numResults)
{
List <ItemLocation> results = new List <ItemLocation>();
using (var connection = DBUtil.MakeConnection())
{
List <string> clauses = new List <string>();
List <string> terms = new List <string>();
foreach (string t in query.Split((char[])null, StringSplitOptions.RemoveEmptyEntries))
{
string term = t;
string clause;
if (term.StartsWith("uwp:"))
{
term = term.Substring(term.IndexOf(':') + 1);
clause = "uwp LIKE @term";
types = SearchResultsType.UWP;
}
else if (term.StartsWith("exact:"))
{
term = term.Substring(term.IndexOf(':') + 1);
clause = "name LIKE @term";
}
else if (term.StartsWith("like:"))
{
term = term.Substring(term.IndexOf(':') + 1);
clause = "SOUNDEX(name) = SOUNDEX(@term)";
}
else if (term.Contains("%") || term.Contains("_"))
{
clause = "name LIKE @term";
}
else
{
clause = "name LIKE @term + '%' OR name LIKE '% ' + @term + '%'";
}
clause = clause.Replace("@term", String.Format("@term{0}", terms.Count));
clauses.Add("(" + clause + ")");
terms.Add(term);
}
string where = String.Join(" AND ", clauses.ToArray());
// NOTE: DISTINCT is to filter out "Ley" and "Ley Sector" (different names, same result).
// TODO: Include the searched-for name in the results, and show alternate names in the result set.
// {0} is the list of distinct fields (i.e. coordinates), {1} is the table, {2} is the filter
string query_format = "SELECT DISTINCT TOP " + numResults + " {0},name FROM {1} WHERE {2} ORDER BY name ASC";
// Sectors
if (types.HasFlag(SearchResultsType.Sectors) && numResults > 0)
{
string sql = String.Format(query_format, "x, y", "sectors", where);
using (var sqlCommand = new SqlCommand(sql, connection))
{
for (int i = 0; i < terms.Count; ++i)
{
sqlCommand.Parameters.AddWithValue(String.Format("@term{0}", i), terms[i]);
}
using (var row = sqlCommand.ExecuteReader())
{
while (row.Read())
{
results.Add(new SectorLocation(row.GetInt32(0), row.GetInt32(1)));
numResults -= 1;
}
}
}
}
// Subsectors
if (types.HasFlag(SearchResultsType.Subsectors) && numResults > 0)
{
string sql = String.Format(query_format, "sector_x, sector_y, subsector_index", "subsectors", where);
using (var sqlCommand = new SqlCommand(sql, connection))
{
for (int i = 0; i < terms.Count; ++i)
{
sqlCommand.Parameters.AddWithValue(String.Format("@term{0}", i), terms[i]);
}
using (var row = sqlCommand.ExecuteReader())
{
while (row.Read())
{
char[] chars = new char[1];
row.GetChars(2, 0, chars, 0, chars.Length);
results.Add(new SubsectorLocation(row.GetInt32(0), row.GetInt32(1), chars[0]));
}
}
}
}
// Worlds & UWPs
if ((types.HasFlag(SearchResultsType.Worlds) || types.HasFlag(SearchResultsType.UWP)) && numResults > 0)
{
string sql = String.Format(query_format, "sector_x, sector_y, hex_x, hex_y", "worlds", where);
using (var sqlCommand = new SqlCommand(sql, connection))
{
for (int i = 0; i < terms.Count; ++i)
{
sqlCommand.Parameters.AddWithValue(String.Format("@term{0}", i), terms[i]);
}
using (var row = sqlCommand.ExecuteReader())
{
while (row.Read())
{
results.Add(new WorldLocation(row.GetInt32(0), row.GetInt32(1), row.GetInt32(2), row.GetInt32(3)));
}
}
}
}
}
return(results);
}
public static IEnumerable <ItemLocation> PerformSearch(string milieu, string query, SearchResultsType types, int maxResultsPerType, bool random = false)
{
List <ItemLocation> results = new List <ItemLocation>();
List <string> clauses;
List <string> terms;
types = ParseQuery(query, types, out clauses, out terms);
if (clauses.Count() == 0 && !random)
{
return(results);
}
clauses.Insert(0, "milieu = @term");
terms.Insert(0, milieu ?? SectorMap.DEFAULT_MILIEU);
string where = string.Join(" AND ",
clauses.Select((clause, index) => "(" + clause.Replace("@term", $"@term{index}") + ")"));
string orderBy = random ? "ORDER BY NEWID()" : "";
// NOTE: DISTINCT is to filter out "Ley" and "Ley Sector" (different names, same result).
// * {0} is the list of distinct fields (i.e. coordinates),
// * {1} is the list of fields in the subquery (same as {0} but with "name" added,
// * {2} is the table
// * {3} is the filter (WHERE clause, not including "WHERE")
// * {4} is the order (ORDERBY clause)
// * {5} is the limit (TOP clause, not including "TOP")
// Since we need the distinct values from the term {0} but don't use the name for the results construction,
// we can ignore name in the resultset. This allows us to get the top N results from the database, sort by
// name, and then toss out duplicates not based on name but on the other, used, columns. Here's a sample
// subquery that works for the sector table:
// SELECT DISTINCT TOP 160 tt.x, tt.y
// FROM (SELECT TOP 160 x, y,name
// FROM sectors
// WHERE (name LIKE 'LEY%' OR name LIKE '%LEY%')
// ORDER BY name ASC) AS tt;
// TODO: Include the searched-for name in the results, and show alternate names in the result set.
string query_format = "SELECT DISTINCT TOP {5} {0} FROM (SELECT TOP {5} {1} FROM {2} WHERE {3} {4}) AS TT";
using (var connection = DBUtil.MakeConnection())
{
// Sectors
if (types.HasFlag(SearchResultsType.Sectors))
{
// Note duplicated field names so the results of both queries can come out right.
string sql = string.Format(query_format, "TT.x, TT.y", "x, y", "sectors", where, orderBy, maxResultsPerType);
using (var sqlCommand = new SqlCommand(sql, connection))
{
for (int i = 0; i < terms.Count; ++i)
{
sqlCommand.Parameters.AddWithValue($"@term{i}", terms[i]);
}
using (var row = sqlCommand.ExecuteReader())
{
while (row.Read())
{
results.Add(new SectorLocation(row.GetInt32(0), row.GetInt32(1)));
}
}
}
}
// Subsectors
if (types.HasFlag(SearchResultsType.Subsectors))
{
// Note duplicated field names so the results of both queries can come out right.
string sql = string.Format(query_format, "TT.sector_x, TT.sector_y, TT.subsector_index", "sector_x, sector_y, subsector_index", "subsectors", where, orderBy, maxResultsPerType);
using (var sqlCommand = new SqlCommand(sql, connection))
{
for (int i = 0; i < terms.Count; ++i)
{
sqlCommand.Parameters.AddWithValue($"@term{i}", terms[i]);
}
using (var row = sqlCommand.ExecuteReader())
{
while (row.Read())
{
char[] chars = new char[1];
row.GetChars(2, 0, chars, 0, chars.Length);
results.Add(new SubsectorLocation(row.GetInt32(0), row.GetInt32(1), chars[0]));
}
}
}
}
// Worlds & UWPs, etc
if (types.HasFlag(SearchResultsType.Worlds))
{
// Note duplicated field names so the results of both queries can come out right.
string sql = string.Format(query_format, "TT.sector_x, TT.sector_y, TT.hex_x, TT.hex_y", "sector_x, sector_y, hex_x, hex_y", "worlds", where, orderBy, maxResultsPerType);
using (var sqlCommand = new SqlCommand(sql, connection))
{
for (int i = 0; i < terms.Count; ++i)
{
sqlCommand.Parameters.AddWithValue($"@term{i}", terms[i]);
}
using (var row = sqlCommand.ExecuteReader())
{
while (row.Read())
{
results.Add(new WorldLocation(row.GetInt32(0), row.GetInt32(1), (byte)row.GetInt32(2), (byte)row.GetInt32(3)));
}
}
}
}
// Labels
if (types.HasFlag(SearchResultsType.Labels))
{
// Note duplicated field names so the results of both queries can come out right.
string sql = string.Format(query_format, "TT.x, TT.y, TT.radius, TT.name", "x, y, radius, name", "labels", where, orderBy, maxResultsPerType);
using (var sqlCommand = new SqlCommand(sql, connection))
{
for (int i = 0; i < terms.Count; ++i)
{
sqlCommand.Parameters.AddWithValue($"@term{i}", terms[i]);
}
using (var row = sqlCommand.ExecuteReader())
{
while (row.Read())
{
results.Add(new LabelLocation(row.GetString(3), new Point(row.GetInt32(0), row.GetInt32(1)), row.GetInt32(2)));
}
}
}
}
}
return(results);
}
public static void PopulateDatabase(ResourceManager resourceManager, StatusCallback callback)
{
// Lock to prevent indexing twice, without blocking tile requests.
lock (SearchEngine.s_lock)
{
// NOTE: This (re)initializes a static data structure used for
// resolving names into sector locations, so needs to be run
// before any other objects (e.g. Worlds) are loaded.
SectorMap map = SectorMap.GetInstance(resourceManager);
using (var connection = DBUtil.MakeConnection())
{
SqlCommand sqlCommand;
//
// Repopulate the tables - locally first
// FUTURE: will need to batch this up rather than keep it in memory!
//
DataTable dt_sectors = new DataTable();
for (int i = 0; i < SECTORS_COLUMNS.Length; ++i)
{
dt_sectors.Columns.Add(new DataColumn());
}
DataTable dt_subsectors = new DataTable();
for (int i = 0; i < SUBSECTORS_COLUMNS.Length; ++i)
{
dt_subsectors.Columns.Add(new DataColumn());
}
DataTable dt_worlds = new DataTable();
for (int i = 0; i < WORLDS_COLUMNS.Length; ++i)
{
dt_worlds.Columns.Add(new DataColumn());
}
DataTable dt_labels = new DataTable();
for (int i = 0; i < LABELS_COLUMNS.Length; ++i)
{
dt_labels.Columns.Add(new DataColumn());
}
// Map of (milieu, string) => [ points ... ]
Dictionary <Tuple <string, string>, List <Point> > labels = new Dictionary <Tuple <string, string>, List <Point> >();
Action <string, string, Point> AddLabel = (string milieu, string text, Point coords) => {
if (text == null)
{
return;
}
text = SanifyLabel(text);
var key = Tuple.Create(milieu, text);
if (!labels.ContainsKey(key))
{
labels.Add(key, new List <Point>());
}
labels[key].Add(coords);
};
callback("Parsing data...");
foreach (Sector sector in map.Sectors)
{
// TODO: Index alternate milieu
if (!sector.Tags.Contains("OTU") && !sector.Tags.Contains("Faraway"))
{
continue;
}
foreach (Name name in sector.Names)
{
DataRow row = dt_sectors.NewRow();
row.ItemArray = new object[] { sector.CanonicalMilieu, sector.X, sector.Y, name.Text };
dt_sectors.Rows.Add(row);
}
if (!string.IsNullOrEmpty(sector.Abbreviation))
{
DataRow row = dt_sectors.NewRow();
row.ItemArray = new object[] { sector.CanonicalMilieu, sector.X, sector.Y, sector.Abbreviation };
dt_sectors.Rows.Add(row);
}
foreach (Subsector subsector in sector.Subsectors)
{
DataRow row = dt_subsectors.NewRow();
row.ItemArray = new object[] { sector.CanonicalMilieu, sector.X, sector.Y, subsector.Index, subsector.Name };
dt_subsectors.Rows.Add(row);
}
foreach (Border border in sector.Borders.Where(b => b.ShowLabel))
{
AddLabel(
sector.CanonicalMilieu,
border.GetLabel(sector),
Astrometrics.LocationToCoordinates(new Location(sector.Location, border.LabelPosition)));
}
foreach (Label label in sector.Labels)
{
AddLabel(
sector.CanonicalMilieu,
label.Text,
Astrometrics.LocationToCoordinates(new Location(sector.Location, label.Hex)));
}
#if DEBUG
if (!sector.Selected)
{
continue;
}
#endif
// NOTE: May need to page this at some point
WorldCollection worlds = sector.GetWorlds(resourceManager, cacheResults: false);
if (worlds == null)
{
continue;
}
var world_query = from world in worlds
where !world.IsPlaceholder
select world;
foreach (World world in world_query)
{
DataRow row = dt_worlds.NewRow();
row.ItemArray = new object[] {
sector.CanonicalMilieu,
world.Coordinates.X,
world.Coordinates.Y,
sector.X,
sector.Y,
world.X,
world.Y,
string.IsNullOrEmpty(world.Name) ? (object)DBNull.Value : (object)world.Name,
world.UWP,
world.Remarks,
world.PBG,
string.IsNullOrEmpty(world.Zone) ? "G" : world.Zone,
world.Allegiance,
sector.Names.Count > 0 ? (object)sector.Names[0] : (object)DBNull.Value
};
dt_worlds.Rows.Add(row);
}
}
foreach (KeyValuePair <Tuple <string, string>, List <Point> > entry in labels)
{
string milieu = entry.Key.Item1;
string name = entry.Key.Item2;
List <Point> points = entry.Value;
Point avg = new Point(
(int)Math.Round(points.Select(p => p.X).Average()),
(int)Math.Round(points.Select(p => p.Y).Average()));
Point min = new Point(points.Select(p => p.X).Min(), points.Select(p => p.Y).Min());
Point max = new Point(points.Select(p => p.X).Max(), points.Select(p => p.Y).Max());
Size size = new Size(max.X - min.X, max.Y - min.Y);
int radius = Math.Max(size.Width, size.Height);
DataRow row = dt_labels.NewRow();
row.ItemArray = new object[] {
milieu,
avg.X,
avg.Y,
radius,
name
};
dt_labels.Rows.Add(row);
}
//
// Rebuild the tables with fresh schema
//
const string INDEX_OPTIONS = " WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)";
const string DROP_TABLE_IF_EXISTS = "IF EXISTS(SELECT 1 FROM sys.objects WHERE OBJECT_ID = OBJECT_ID(N'{0}') AND type = (N'U')) DROP TABLE {0}";
string[] rebuild_schema =
{
string.Format(DROP_TABLE_IF_EXISTS, "sectors"),
"CREATE TABLE sectors (" + string.Join(",", SECTORS_COLUMNS) + ")",
"CREATE NONCLUSTERED INDEX sector_name ON sectors ( name ASC )" + INDEX_OPTIONS,
"CREATE NONCLUSTERED INDEX sector_milieu ON sectors ( milieu ASC )" + INDEX_OPTIONS,
string.Format(DROP_TABLE_IF_EXISTS, "subsectors"),
"CREATE TABLE subsectors (" + string.Join(",", SUBSECTORS_COLUMNS) + ")",
"CREATE NONCLUSTERED INDEX subsector_name ON subsectors ( name ASC )" + INDEX_OPTIONS,
"CREATE NONCLUSTERED INDEX subsector_milieu ON subsectors ( milieu ASC )" + INDEX_OPTIONS,
string.Format(DROP_TABLE_IF_EXISTS, "worlds"),
"CREATE TABLE worlds (" + string.Join(",", WORLDS_COLUMNS) + ")",
"CREATE NONCLUSTERED INDEX world_name ON worlds ( name ASC )" + INDEX_OPTIONS,
"CREATE NONCLUSTERED INDEX world_uwp ON worlds ( uwp ASC )" + INDEX_OPTIONS,
"CREATE NONCLUSTERED INDEX world_pbg ON worlds ( pbg ASC )" + INDEX_OPTIONS,
"CREATE NONCLUSTERED INDEX world_alleg ON worlds ( alleg ASC )" + INDEX_OPTIONS,
"CREATE NONCLUSTERED INDEX world_sector_name ON worlds ( sector_name ASC )" + INDEX_OPTIONS,
"CREATE NONCLUSTERED INDEX world_milieu ON worlds ( milieu ASC )" + INDEX_OPTIONS,
string.Format(DROP_TABLE_IF_EXISTS, "labels"),
"CREATE TABLE labels (" + string.Join(",", LABELS_COLUMNS) + ")",
"CREATE NONCLUSTERED INDEX name ON labels ( name ASC )" + INDEX_OPTIONS,
"CREATE NONCLUSTERED INDEX milieu ON labels ( milieu ASC )" + INDEX_OPTIONS,
};
callback("Rebuilding schema...");
foreach (string cmd in rebuild_schema)
{
sqlCommand = new SqlCommand(cmd, connection);
sqlCommand.ExecuteNonQuery();
}
//
// And shovel the data into the database en masse
//
Action <string, DataTable, int> BulkInsert = (string name, DataTable table, int batchSize) => {
using (var bulk = new SqlBulkCopy(connection, SqlBulkCopyOptions.TableLock, null))
{
callback($"Writing {table.Rows.Count} {name}...");
bulk.BatchSize = batchSize;
bulk.DestinationTableName = name;
bulk.WriteToServer(table);
}
};
BulkInsert("sectors", dt_sectors, dt_sectors.Rows.Count);
BulkInsert("subsectors", dt_subsectors, dt_subsectors.Rows.Count);
BulkInsert("worlds", dt_worlds, 4096);
BulkInsert("labels", dt_labels, dt_labels.Rows.Count);
}
callback("Complete!");
}
}
public static IEnumerable <ItemLocation> PerformSearch(string query, SearchResultsType types, int maxResultsPerType)
{
List <ItemLocation> results = new List <ItemLocation>();
List <string> clauses;
List <string> terms;
types = ParseQuery(query, types, out clauses, out terms);
if (clauses.Count() == 0)
{
return(results);
}
string where = string.Join(" AND ", clauses.ToArray());
// NOTE: DISTINCT is to filter out "Ley" and "Ley Sector" (different names, same result).
// TODO: Include the searched-for name in the results, and show alternate names in the result set.
// {0} is the list of distinct fields (i.e. coordinates), {1} is the list of fields in the subquery (same as {0} but with "name" added, {2} is the table, {3} is the filter
// Since we need the distinct values from the term {0} but don't use the name for the results construction, we can ignore name in the resultset.
// This allows us to get the top N results from the database, sort by name, and then toss out duplicates not based on name but on the other, used, columns
// Here's a sample subquery that works for the sector table.
// SELECT DISTINCT TOP 160 tt.x, tt.y FROM (SELECT TOP 160 x, y,name FROM sectors WHERE (name LIKE 'LEY%' OR name LIKE '%LEY%') ORDER BY name ASC) AS tt;
string query_format = "SELECT DISTINCT TOP " + maxResultsPerType + " {0} FROM (SELECT TOP " + maxResultsPerType + " {1} FROM {2} WHERE {3}) AS TT";
using (var connection = DBUtil.MakeConnection())
{
// Sectors
if (types.HasFlag(SearchResultsType.Sectors))
{
// Note duplicated field names so the results of both queries can come out right.
string sql = string.Format(query_format, "TT.x, TT.y", "x, y", "sectors", where);
using (var sqlCommand = new SqlCommand(sql, connection))
{
for (int i = 0; i < terms.Count; ++i)
{
sqlCommand.Parameters.AddWithValue(string.Format("@term{0}", i), terms[i]);
}
using (var row = sqlCommand.ExecuteReader())
{
while (row.Read())
{
results.Add(new SectorLocation(row.GetInt32(0), row.GetInt32(1)));
}
}
}
}
// Subsectors
if (types.HasFlag(SearchResultsType.Subsectors))
{
// Note duplicated field names so the results of both queries can come out right.
string sql = string.Format(query_format, "TT.sector_x, TT.sector_y, TT.subsector_index", "sector_x, sector_y, subsector_index", "subsectors", where);
using (var sqlCommand = new SqlCommand(sql, connection))
{
for (int i = 0; i < terms.Count; ++i)
{
sqlCommand.Parameters.AddWithValue(string.Format("@term{0}", i), terms[i]);
}
using (var row = sqlCommand.ExecuteReader())
{
while (row.Read())
{
char[] chars = new char[1];
row.GetChars(2, 0, chars, 0, chars.Length);
results.Add(new SubsectorLocation(row.GetInt32(0), row.GetInt32(1), chars[0]));
}
}
}
}
// Worlds & UWPs, etc
if (types.HasFlag(SearchResultsType.Worlds))
{
// Note duplicated field names so the results of both queries can come out right.
string sql = string.Format(query_format, "TT.sector_x, TT.sector_y, TT.hex_x, TT.hex_y", "sector_x, sector_y, hex_x, hex_y", "worlds", where);
using (var sqlCommand = new SqlCommand(sql, connection))
{
for (int i = 0; i < terms.Count; ++i)
{
sqlCommand.Parameters.AddWithValue(string.Format("@term{0}", i), terms[i]);
}
using (var row = sqlCommand.ExecuteReader())
{
while (row.Read())
{
results.Add(new WorldLocation(row.GetInt32(0), row.GetInt32(1), (byte)row.GetInt32(2), (byte)row.GetInt32(3)));
}
}
}
}
// Labels
if (types.HasFlag(SearchResultsType.Labels))
{
// Note duplicated field names so the results of both queries can come out right.
string sql = string.Format(query_format, "TT.x, TT.y, TT.radius, TT.name", "x, y, radius, name", "labels", where);
using (var sqlCommand = new SqlCommand(sql, connection))
{
for (int i = 0; i < terms.Count; ++i)
{
sqlCommand.Parameters.AddWithValue(string.Format("@term{0}", i), terms[i]);
}
using (var row = sqlCommand.ExecuteReader())
{
while (row.Read())
{
results.Add(new LabelLocation(row.GetString(3), new Point(row.GetInt32(0), row.GetInt32(1)), row.GetInt32(2)));
}
}
}
}
}
return(results);
}