#2842 sp_BlitzWho params to table

Adds new cached_parameter_info and live_parameter_info to existing tables. Closes #2842.

Author: BrentOzar

sp_BlitzWho.sql

@@ -262,6 +262,20 @@ IF @OutputDatabaseName IS NOT NULL AND @OutputSchemaName IS NOT NULL AND @Output
 		ALTER TABLE ' + @ObjectFullName + N' ADD JoinKey AS ServerName + CAST(CheckDate AS NVARCHAR(50));';
 	EXEC(@StringToExecute);
 
+	/* If the table doesn't have the new cached_parameter_info computed column, add it. See Github #2842. */
+	SET @ObjectFullName = @OutputDatabaseName + N'.' + @OutputSchemaName + N'.' +  @OutputTableName;
+	SET @StringToExecute = N'IF NOT EXISTS (SELECT * FROM ' + @OutputDatabaseName + N'.sys.all_columns 
+		WHERE object_id = (OBJECT_ID(''' + @ObjectFullName + N''')) AND name = ''cached_parameter_info'')
+		ALTER TABLE ' + @ObjectFullName + N' ADD cached_parameter_info NVARCHAR(MAX) NULL;';
+	EXEC(@StringToExecute);
+
+	/* If the table doesn't have the new live_parameter_info computed column, add it. See Github #2842. */
+	SET @ObjectFullName = @OutputDatabaseName + N'.' + @OutputSchemaName + N'.' +  @OutputTableName;
+	SET @StringToExecute = N'IF NOT EXISTS (SELECT * FROM ' + @OutputDatabaseName + N'.sys.all_columns 
+		WHERE object_id = (OBJECT_ID(''' + @ObjectFullName + N''')) AND name = ''live_parameter_info'')
+		ALTER TABLE ' + @ObjectFullName + N' ADD live_parameter_info NVARCHAR(MAX) NULL;';
+	EXEC(@StringToExecute);
+
 	/* Delete history older than @OutputTableRetentionDays */
 	SET @OutputTableCleanupDate = CAST( (DATEADD(DAY, -1 * @OutputTableRetentionDays, GETDATE() ) ) AS DATE);
 	SET @StringToExecute = N' IF EXISTS(SELECT * FROM '