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Jade Wang
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feat(csharp): make StatementExecutionConnection inherit from AdbcConnection
Make StatementExecutionConnection a proper ADBC connection by inheriting from AdbcConnection base class. This establishes the correct architecture for the REST API implementation. Changes: - StatementExecutionConnection now inherits from AdbcConnection - Added StatementExecutionStatement stub class implementing AdbcStatement - CreateStatement() now returns a StatementExecutionStatement instance - Implemented required abstract methods (GetObjects, GetTableSchema, GetTableTypes) with NotImplemented exceptions (metadata operations to be added in future) - Statement execution methods throw NotImplementedException with note about PECO-2791-B implementation Testing: - Added 6 new unit tests verifying AdbcConnection implementation - Updated E2E test to verify CreateStatement returns a statement - All 42 tests pass (26 unit + 16 E2E) This is a minimal implementation (Option 1) that establishes the proper inheritance hierarchy while deferring full query execution to PECO-2791-B. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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‎csharp/src/StatementExecution/StatementExecutionConnection.cs‎

Lines changed: 53 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -21,14 +21,15 @@
2121
using System.Threading.Tasks;
2222
using Apache.Arrow.Adbc.Drivers.Apache;
2323
using Apache.Arrow.Adbc.Drivers.Apache.Spark;
24+
using Apache.Arrow.Ipc;
2425

2526
namespace Apache.Arrow.Adbc.Drivers.Databricks.StatementExecution
2627
{
2728
/// <summary>
2829
/// Connection implementation for Databricks Statement Execution REST API.
2930
/// Manages SQL sessions and statement creation using the REST protocol.
3031
/// </summary>
31-
internal class StatementExecutionConnection : IDisposable
32+
internal class StatementExecutionConnection : AdbcConnection
3233
{
3334
private readonly IStatementExecutionClient _client;
3435
private readonly IReadOnlyDictionary<string, string> _properties;
@@ -105,12 +106,12 @@ public async Task OpenAsync(CancellationToken cancellationToken = default)
105106
/// </summary>
106107
/// <returns>A new statement instance.</returns>
107108
/// <remarks>
108-
/// This will be implemented in PECO-2791-B to return StatementExecutionStatement.
109-
/// For now, it throws NotImplementedException.
109+
/// Returns a StatementExecutionStatement instance. Full query execution
110+
/// implementation will be completed in PECO-2791-B.
110111
/// </remarks>
111-
public AdbcStatement CreateStatement()
112+
public override AdbcStatement CreateStatement()
112113
{
113-
throw new NotImplementedException("Statement creation will be implemented in PECO-2791-B");
114+
return new StatementExecutionStatement(_client, _warehouseId, _sessionId);
114115
}
115116

116117
/// <summary>
@@ -138,6 +139,51 @@ public async Task CloseAsync(CancellationToken cancellationToken = default)
138139
}
139140
}
140141

142+
/// <summary>
143+
/// Get a hierarchical view of all catalogs, database schemas, tables, and columns.
144+
/// </summary>
145+
/// <remarks>
146+
/// Metadata operations via Statement Execution API will be implemented in a future release.
147+
/// </remarks>
148+
public override IArrowArrayStream GetObjects(
149+
GetObjectsDepth depth,
150+
string? catalogPattern,
151+
string? dbSchemaPattern,
152+
string? tableNamePattern,
153+
IReadOnlyList<string>? tableTypes,
154+
string? columnNamePattern)
155+
{
156+
throw AdbcException.NotImplemented(
157+
"GetObjects not yet implemented for Statement Execution API. " +
158+
"Metadata operations will be added in a future release.");
159+
}
160+
161+
/// <summary>
162+
/// Get the Arrow schema of a database table.
163+
/// </summary>
164+
/// <remarks>
165+
/// Metadata operations via Statement Execution API will be implemented in a future release.
166+
/// </remarks>
167+
public override Schema GetTableSchema(string? catalog, string? dbSchema, string tableName)
168+
{
169+
throw AdbcException.NotImplemented(
170+
"GetTableSchema not yet implemented for Statement Execution API. " +
171+
"Metadata operations will be added in a future release.");
172+
}
173+
174+
/// <summary>
175+
/// Get a list of table types supported by the database.
176+
/// </summary>
177+
/// <remarks>
178+
/// Metadata operations via Statement Execution API will be implemented in a future release.
179+
/// </remarks>
180+
public override IArrowArrayStream GetTableTypes()
181+
{
182+
throw AdbcException.NotImplemented(
183+
"GetTableTypes not yet implemented for Statement Execution API. " +
184+
"Metadata operations will be added in a future release.");
185+
}
186+
141187
/// <summary>
142188
/// Extracts the warehouse ID from the http_path property (SparkParameters.Path).
143189
/// </summary>
@@ -183,7 +229,7 @@ private static string ExtractWarehouseId(IReadOnlyDictionary<string, string> pro
183229
/// <summary>
184230
/// Disposes the connection and releases resources.
185231
/// </summary>
186-
public void Dispose()
232+
public override void Dispose()
187233
{
188234
if (!_disposed)
189235
{
@@ -201,6 +247,7 @@ public void Dispose()
201247
}
202248
}
203249

250+
base.Dispose();
204251
_disposed = true;
205252
}
206253
}

‎csharp/test/E2E/StatementExecution/StatementExecutionConnectionE2ETests.cs‎

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -522,16 +522,16 @@ public async Task MultipleConnections_Independent_EachHasOwnSession()
522522
}
523523

524524
[Fact]
525-
public void CreateStatement_ThrowsNotImplementedException()
525+
public void CreateStatement_ReturnsStatement()
526526
{
527527
_client = CreateClient();
528528
var properties = GetConnectionProperties(enableSessionManagement: true);
529529
var connection = new StatementExecutionConnection(_client, properties);
530530

531-
var exception = Assert.Throws<NotImplementedException>(() =>
532-
connection.CreateStatement());
531+
var statement = connection.CreateStatement();
533532

534-
Assert.Contains("PECO-2791-B", exception.Message);
533+
Assert.NotNull(statement);
534+
Assert.IsAssignableFrom<AdbcStatement>(statement);
535535
}
536536
}
537537
}

‎csharp/test/Unit/StatementExecution/StatementExecutionConnectionTests.cs‎

Lines changed: 103 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -382,10 +382,10 @@ public async Task Dispose_WithActiveSession_ClosesSession()
382382

383383
#endregion
384384

385-
#region CreateStatement Tests
385+
#region AdbcConnection Implementation Tests
386386

387387
[Fact]
388-
public void CreateStatement_ThrowsNotImplementedException()
388+
public void Connection_InheritsFromAdbcConnection()
389389
{
390390
var properties = new Dictionary<string, string>
391391
{
@@ -394,7 +394,107 @@ public void CreateStatement_ThrowsNotImplementedException()
394394

395395
var connection = new StatementExecutionConnection(_mockClient.Object, properties);
396396

397-
var exception = Assert.Throws<NotImplementedException>(() => connection.CreateStatement());
397+
Assert.IsAssignableFrom<AdbcConnection>(connection);
398+
}
399+
400+
[Fact]
401+
public void CreateStatement_ReturnsStatementExecutionStatement()
402+
{
403+
var properties = new Dictionary<string, string>
404+
{
405+
{ SparkParameters.Path, "/sql/1.0/warehouses/test-warehouse" }
406+
};
407+
408+
var connection = new StatementExecutionConnection(_mockClient.Object, properties);
409+
var statement = connection.CreateStatement();
410+
411+
Assert.NotNull(statement);
412+
Assert.IsType<StatementExecutionStatement>(statement);
413+
}
414+
415+
[Fact]
416+
public void GetObjects_ThrowsNotImplemented()
417+
{
418+
var properties = new Dictionary<string, string>
419+
{
420+
{ SparkParameters.Path, "/sql/1.0/warehouses/test-warehouse" }
421+
};
422+
423+
var connection = new StatementExecutionConnection(_mockClient.Object, properties);
424+
425+
var exception = Assert.Throws<AdbcException>(() =>
426+
connection.GetObjects(
427+
AdbcConnection.GetObjectsDepth.All,
428+
null, null, null, null, null));
429+
430+
Assert.Contains("not yet implemented", exception.Message);
431+
}
432+
433+
[Fact]
434+
public void GetTableSchema_ThrowsNotImplemented()
435+
{
436+
var properties = new Dictionary<string, string>
437+
{
438+
{ SparkParameters.Path, "/sql/1.0/warehouses/test-warehouse" }
439+
};
440+
441+
var connection = new StatementExecutionConnection(_mockClient.Object, properties);
442+
443+
var exception = Assert.Throws<AdbcException>(() =>
444+
connection.GetTableSchema(null, null, "test_table"));
445+
446+
Assert.Contains("not yet implemented", exception.Message);
447+
}
448+
449+
[Fact]
450+
public void GetTableTypes_ThrowsNotImplemented()
451+
{
452+
var properties = new Dictionary<string, string>
453+
{
454+
{ SparkParameters.Path, "/sql/1.0/warehouses/test-warehouse" }
455+
};
456+
457+
var connection = new StatementExecutionConnection(_mockClient.Object, properties);
458+
459+
var exception = Assert.Throws<AdbcException>(() =>
460+
connection.GetTableTypes());
461+
462+
Assert.Contains("not yet implemented", exception.Message);
463+
}
464+
465+
[Fact]
466+
public void Statement_ExecuteQuery_ThrowsNotImplementedException()
467+
{
468+
var properties = new Dictionary<string, string>
469+
{
470+
{ SparkParameters.Path, "/sql/1.0/warehouses/test-warehouse" }
471+
};
472+
473+
var connection = new StatementExecutionConnection(_mockClient.Object, properties);
474+
var statement = connection.CreateStatement();
475+
statement.SqlQuery = "SELECT 1";
476+
477+
var exception = Assert.Throws<NotImplementedException>(() =>
478+
statement.ExecuteQuery());
479+
480+
Assert.Contains("PECO-2791-B", exception.Message);
481+
}
482+
483+
[Fact]
484+
public void Statement_ExecuteUpdate_ThrowsNotImplementedException()
485+
{
486+
var properties = new Dictionary<string, string>
487+
{
488+
{ SparkParameters.Path, "/sql/1.0/warehouses/test-warehouse" }
489+
};
490+
491+
var connection = new StatementExecutionConnection(_mockClient.Object, properties);
492+
var statement = connection.CreateStatement();
493+
statement.SqlQuery = "INSERT INTO test VALUES (1)";
494+
495+
var exception = Assert.Throws<NotImplementedException>(() =>
496+
statement.ExecuteUpdate());
497+
398498
Assert.Contains("PECO-2791-B", exception.Message);
399499
}
400500

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