SNOW-933246: adding missed fix for HTAP parameter removal

Snowflake.Data.Tests/IntegrationTests/SFDbDataReaderIT.cs

@@ -174,6 +174,38 @@ public void TestGetDate(string inputTimeStr)
             testGetDateAndOrTime(inputTimeStr, null, SFDataType.DATE);
         }
 
+        [Test]
+        public void TestDateOutputFormat()
+        {
+            using (IDbConnection conn = new SnowflakeDbConnection())
+            {
+                conn.ConnectionString = ConnectionString;
+                conn.Open();
+                IDbCommand cmd = conn.CreateCommand();
+
+                try
+                {
+                    cmd.CommandText = "alter session set DATE_OUTPUT_FORMAT='MM/DD/YYYY'";
+                    cmd.ExecuteNonQuery();
+
+                    cmd.CommandText = $"select TO_DATE('2013-05-17')";
+                    IDataReader reader = cmd.ExecuteReader();
+
+                    Assert.IsTrue(reader.Read());
+                    Assert.AreEqual("05/17/2013", reader.GetString(0));
+
+                    reader.Close();
+                }
+                finally
+                {
+                    // set format back to default to avoid impact other test cases
+                    cmd.CommandText = "alter session set DATE_OUTPUT_FORMAT='YYYY-MM-DD'";
+                    cmd.ExecuteNonQuery();
+                }
+
+                conn.Close();
+            }
+        }
 
         [Test]
         [TestCase(null, null)]

Snowflake.Data.Tests/UnitTests/SFSessionTest.cs

@@ -34,6 +34,12 @@ public void TestUpdateDatabaseAndSchema()
 
             Assert.AreEqual(databaseName, sfSession.database);
             Assert.AreEqual(schemaName, sfSession.schema);
+
+            // when database or schema name is missing in the response,
+            // the cached value should keep unchanged
+            sfSession.UpdateDatabaseAndSchema(null, null);
+            Assert.AreEqual(databaseName, sfSession.database);
+            Assert.AreEqual(schemaName, sfSession.schema);
         }
 
         [Test]

Snowflake.Data/Core/ArrowResultSet.cs

@@ -45,7 +45,7 @@ public ArrowResultSet(QueryExecResponseData responseData, SFStatement sfStatemen
 
                 responseData.rowSet = null;
 
-                sfResultSetMetaData = new SFResultSetMetaData(responseData);
+                sfResultSetMetaData = new SFResultSetMetaData(responseData, this.sfStatement.SfSession);
 
                 isClosed = false;
 

Snowflake.Data/Core/SFResultSet.cs

@@ -39,7 +39,7 @@ public SFResultSet(QueryExecResponseData responseData, SFStatement sfStatement,
                 _currentChunk = new SFResultChunk(responseData.rowSet);
                 responseData.rowSet = null;
 
-                sfResultSetMetaData = new SFResultSetMetaData(responseData);
+                sfResultSetMetaData = new SFResultSetMetaData(responseData, this.sfStatement.SfSession);
 
                 isClosed = false;
 

Snowflake.Data/Core/SFResultSetMetaData.cs

@@ -37,24 +37,20 @@ class SFResultSetMetaData
         /// </summary>
         private Dictionary<string, int> columnNameToIndexCache = new Dictionary<string, int>();
 
-        internal SFResultSetMetaData(QueryExecResponseData queryExecResponseData)
+        internal SFResultSetMetaData(QueryExecResponseData queryExecResponseData, SFSession session)
         {
             rowTypes = queryExecResponseData.rowType;
             columnCount = rowTypes.Count;
             statementType = findStatementTypeById(queryExecResponseData.statementTypeId);
             columnTypes = InitColumnTypes();
-            
-            foreach (NameValueParameter parameter in queryExecResponseData.parameters)
+
+            if (session.ParameterMap.ContainsKey(SFSessionParameter.DATE_OUTPUT_FORMAT))
             {
-                switch(parameter.name)
-                {
-                    case "DATE_OUTPUT_FORMAT":
-                        dateOutputFormat = parameter.value;
-                        break;
-                    case "TIME_OUTPUT_FORMAT":
-                        timeOutputFormat = parameter.value;
-                        break;
-                }
+                dateOutputFormat = session.ParameterMap[SFSessionParameter.DATE_OUTPUT_FORMAT].ToString();
+            }
+            if (session.ParameterMap.ContainsKey(SFSessionParameter.TIME_OUTPUT_FORMAT))
+            {
+                timeOutputFormat = session.ParameterMap[SFSessionParameter.TIME_OUTPUT_FORMAT].ToString();
             }
         }
 

Snowflake.Data/Core/Session/SFSession.cs

@@ -380,6 +380,13 @@ internal SFRestRequest BuildTimeoutRestRequest(Uri uri, Object body)
         internal void UpdateSessionParameterMap(List<NameValueParameter> parameterList)
         {
             logger.Debug("Update parameter map");
+            // with HTAP parameter removal parameters might not returned
+            // query response
+            if (parameterList is null)
+            {
+                return;
+            }
+
             foreach (NameValueParameter parameter in parameterList)
             {
                 if (Enum.TryParse(parameter.name, out SFSessionParameter parameterName))
@@ -432,8 +439,16 @@ internal RequestQueryContext GetQueryContextRequest()
 
         internal void UpdateDatabaseAndSchema(string databaseName, string schemaName)
         {
-            this.database = databaseName;
-            this.schema = schemaName;
+            // with HTAP session metadata removal database/schema
+            // might be not returened in query result
+            if (!String.IsNullOrEmpty(databaseName))
+            {
+                this.database = databaseName;
+            }
+            if (!String.IsNullOrEmpty(schemaName))
+            {
+                this.schema = schemaName;
+            }
         }
 
         internal void startHeartBeatForThisSession()

Snowflake.Data/Core/Session/SFSessionParameter.cs

@@ -12,5 +12,7 @@ internal enum SFSessionParameter
         CLIENT_STAGE_ARRAY_BINDING_THRESHOLD,
         CLIENT_SESSION_KEEP_ALIVE,
         QUERY_CONTEXT_CACHE_SIZE,
+        DATE_OUTPUT_FORMAT,
+        TIME_OUTPUT_FORMAT,
     }
 }