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ESENT: Add method CreateIndex

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The index creation process has been separated into a dedicated method to improve readability and stability.
This commit is contained in:
Namhyeon Go 2025-06-24 11:30:27 +09:00
parent 3e4b6a73b5
commit 62d219f443
1 changed files with 41 additions and 12 deletions
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53
WelsonJS.Toolkit/WelsonJS.Launcher/MetadataStore.cs
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@ -17,6 +17,9 @@ namespace WelsonJS.Launcher
{
public class MetadataStore : IDisposable
{
private const string _primaryKeyindexName = "primary";
private const string _indexNamePrefix = "idx_";
private static readonly object _lock = new object();
private static bool _initialized = false;
private static Instance _instance;
@ -105,23 +108,46 @@ namespace WelsonJS.Launcher
Api.JetAddColumn(_session, tableid, col.Name, coldef, null, 0, out _);
}
string indexName = "primary";
string key = $"+{_primaryKey.Name}\0";
string keyDescription = key + "\0"; // double null-terminated
int keyDescriptionLength = Encoding.ASCII.GetByteCount(keyDescription); // in characters
CreateIndex(tableid, new[] { _primaryKey }, CreateIndexGrbit.IndexPrimary | CreateIndexGrbit.IndexUnique);
Api.JetCloseTable(_session, tableid);
Api.JetCommitTransaction(_session, CommitTransactionGrbit.None);
}
public void CreateIndex(JET_TABLEID tableid, IEnumerable<Column> columns, CreateIndexGrbit grbit)
{
if (columns == null)
throw new ArgumentNullException(nameof(columns));
var columnList = columns.ToList();
if (columnList.Count == 0)
throw new ArgumentException("At least one column is required to create an index.", nameof(columns));
if (tableid == JET_TABLEID.Nil)
throw new ArgumentException("Invalid table ID.", nameof(tableid));
bool isPrimaryKeyIndex = (columnList.Count == 1 && columnList[0].IsPrimaryKey);
if (isPrimaryKeyIndex && (grbit & CreateIndexGrbit.IndexPrimary) == 0)
throw new ArgumentException("Primary key index must have the CreateIndexGrbit.IndexPrimary flag set.", nameof(grbit));
string indexName = isPrimaryKeyIndex
? _primaryKeyindexName
: _indexNamePrefix + string.Join("_", columnList.Select(c => c.Name));
string key = string.Concat(columnList.Select(c => "+" + c.Name));
string keyDescription = key + "\0\0"; // double null-terminated
int keyDescriptionLength = keyDescription.Length;
Api.JetCreateIndex(
_session,
tableid,
indexName,
CreateIndexGrbit.IndexPrimary | CreateIndexGrbit.IndexUnique,
grbit,
keyDescription,
keyDescriptionLength,
100
);
Api.JetCloseTable(_session, tableid);
Api.JetCommitTransaction(_session, CommitTransactionGrbit.None);
}
private void CacheColumns()
@ -172,7 +198,7 @@ namespace WelsonJS.Launcher
{
Api.JetBeginTransaction(_session);
Api.JetSetCurrentIndex(_session, table, null);
Api.JetSetCurrentIndex(_session, table, _primaryKeyindexName);
MakeKeyByType(keyValue, keyType, _session, table);
bool found = Api.TrySeek(_session, table, SeekGrbit.SeekEQ);
@ -197,8 +223,9 @@ namespace WelsonJS.Launcher
catch (Exception ex)
{
Trace.TraceError($"[ESENT] Operation failed: {ex.Message}");
MessageBox.Show($"[ESENT] Operation failed: {ex.Message}");
Api.JetRollback(_session, RollbackTransactionGrbit.None);
MessageBox.Show($"[ESENT] Operation failed: {ex.Message}");
return false;
}
}
@ -211,7 +238,7 @@ namespace WelsonJS.Launcher
using (var table = new Table(_session, _dbid, _schema.TableName, OpenTableGrbit.ReadOnly))
{
Api.JetSetCurrentIndex(_session, table, null);
Api.JetSetCurrentIndex(_session, table, _primaryKeyindexName);
MakeKeyByType(keyValue, keyType, _session, table);
if (!Api.TrySeek(_session, table, SeekGrbit.SeekEQ))
return null;
@ -235,6 +262,8 @@ namespace WelsonJS.Launcher
using (var table = new Table(_session, _dbid, _schema.TableName, OpenTableGrbit.ReadOnly))
{
Api.JetSetCurrentIndex(_session, table, _primaryKeyindexName);
if (!Api.TryMoveFirst(_session, table))
return results;
@ -263,7 +292,7 @@ namespace WelsonJS.Launcher
using (var table = new Table(_session, _dbid, _schema.TableName, OpenTableGrbit.Updatable))
{
Api.JetSetCurrentIndex(_session, table, null);
Api.JetSetCurrentIndex(_session, table, _primaryKeyindexName);
MakeKeyByType(keyValue, keyType, _session, table);
if (!Api.TrySeek(_session, table, SeekGrbit.SeekEQ))
return false;