10.2 Release Notes

Release Notes Information

This document includes information on CUBRID 10.2(Build Number: 10.2.0.8797-d56a158).

CUBRID 10.2 includes all of the fixed errors and improved features that were detected in the CUBRID 10.1 and were applied to the previous versions.

For CUBRID 10.1, please find https://www.cubrid.org/manual/en/10.1/release_note/index.html.

For CUBRID 10.0, please find https://www.cubrid.org/manual/en/10.0/release_note/index.html.

For CUBRID 9.3, please find https://www.cubrid.org/manual/en/9.3.0/release_note/index.html.

Overview

CUBRID 10.2 is the latest stable version that includes new features, significant changes and enhancements.

CUBRID 10.2

• is a significantly improved version.

• is more reliable, faster and scalable: Online parallel data loading, optimizes auto-commit workloads

• fixes a large number of critical bugs.

• includes useful SQL extensions: JSON data type and CTE(Common Table Expressions) extensions.

• includes many enhancements to index management: Online parallel index loading, Faster foreign key loading, Invisible Index.

• includes huge scale of code refactoring and modernization.

CUBRID 10.2 is faster. It optimizes auto-commit workloads, for instance, YCSB Workload A (140%: 10.1) and YCSB Workload B (130%: 10.1). For faster bulk data loading, CUBRID 10.2 has online parallel loader which shows x10 performance to CUBRID 10.1.

CUBRID 10.2 is also better, bringing new features. CUBRID 10.2 supports built-in JSON data types, path, functions and operators. Common Table Expression is now allowed for INSERT, REPLACE, DELETE, UPDATE, CREATE TABLE AS SELECT as well as SELECT. Index management is greatly improved. To load a secondary key is no more painful. It supports online index loading which allows other select and DMLs without loosing throughputs. It even provides parallel option to load an online index, which greatly speeds up index loading. It also provides from x2 to x3 performance boost to load foreign keys. Invisible index helps DBAs to test effect of removing an index without making a disruptive change.

CUBRID 10.2 is more reliable and stable too. Double Write Buffer protects against I/O partial writes and includes many optimizations to minimize performance degradation. It has fixed over 1300+ issues as CUBRID 10.2 and passed rigorous tests.

CUBRID 10.2 is built with devtoolset-8(GCC 8.2) of Linux and VS 2017 of Windows. CUBRID code is completely recompiled with C++ and new features implementation fully exploit the C++ extensions and STL.

The database volume of CUBRID 10.2 is not compatible with that of CUBRID 10.1 and earlier versions. Therefore, if you use CUBRID 10.1 or earlier, you must migrate your databases. Regarding this, see Upgrade.

Driver Compatibility

• The JDBC and CCI driver of CUBRID 10.2 are compatible with the DB server of CUBRID 10.1, 10.0, 9.3, 9.2, 9.1, 2008 R4.4, R4.3 or R4.1.

• To upgrade drivers are highly recommended.

We strongly recommend to also upgrade your drivers to use CUBRID 10.2. Some new features, especially for JSON data types are only supported with 10.2 drivers.

For more details on changes, see the 10.2 Changes. Users of previous versions should check the 10.2 Changes and New Cautions sections.

10.2 Changes

Please refer to change logs of CUBRID 10.2.

Cautions

New Cautions

The database volume of CUBRID 10.2 is not compatible with that of CUBRID 10.1 and earlier versions.

Existing Cautions

Locale(language and charset) is specified when creating DB

It is changed as locale is specified when creating DB.

CUBRID_CHARSET environment variable is removed

As locale(language and charset) is specified when creating DB from 9.2 version, CUBRID_CHARSET is not used anymore.

[JDBC] Change zero date of TIMESTAMP into ‘1970-01-01 00:00:00’(GST) from ‘0001-01-01 00:00:00’ when the value of zeroDateTimeBehavior in the connection URL is “round”(CUBRIDSUS-11612)

From 2008 R4.4, when the value of the property “zeroDateTimeBehavior” in the connection URL is “round”, the zero date value of TIMESTAMP is changed into ‘1970-01-01 00:00:00’(GST) from ‘0001-01-01 00:00:00’. You should be cautious when using zero date in your application.

Recommendation for installing CUBRID SH package in AIX(CUBRIDSUS-12251)

If you install CUBRID SH package by using ksh in AIX OS, it fails with the following error.

0403-065 An incomplete or invalid multibyte character encountered.

Therefore, it is recommended to use ksh93 or bash instead of ksh.

$ ksh93 ./CUBRID-9.2.0.0146-AIX-ppc64.sh
$ bash ./CUBRID-9.2.0.0146-AIX-ppc64.sh

CUBRID_LANG is removed, CUBRID_MSG_LANG is added

From version 9.1, CUBRID_LANG environment variable is no longer used. To output the utility message and the error message, the CUBRID_MSG_LANG environment variable is used.

Modify how to process an error for the array of the result of executing several queries at once in the CCI application(CUBRIDSUS-9364)

When executing several queries at once in the CCI application, if an error has occurs from at least one query among the results of executing queries by using the cci_execute_array function, the cci_execute_batch function, the error code of the corresponding query was returned from 2008 R3.0 to 2008 R4.1. This problem has been fixed to return the number of the entire queries and check the error of each query by using the CCI_QUERY_RESULT_* macros from 2008 R4.3 and 9.1.

In earlier versions of this modification, there is no way to know whether each query in the array is success or failure when an error occurs; therefore, it it requires certain conditions.

...
char *query = "INSERT INTO test_data (id, ndata, cdata, sdata, ldata) VALUES (?, ?, 'A', 'ABCD', 1234)";
...
req = cci_prepare (con, query, 0, &cci_error);
...
error = cci_bind_param_array_size (req, 3);
...
error = cci_bind_param_array (req, 1, CCI_A_TYPE_INT, co_ex, null_ind, CCI_U_TYPE_INT);
...
n_executed = cci_execute_array (req, &result, &cci_error);

if (n_executed < 0)
  {
    printf ("execute error: %d, %s\n", cci_error.err_code, cci_error.err_msg);

    for (i = 1; i <= 3; i++)
      {
        printf ("query %d\n", i);
        printf ("result count = %d\n", CCI_QUERY_RESULT_RESULT (result, i));
        printf ("error message = %s\n", CCI_QUERY_RESULT_ERR_MSG (result, i));
        printf ("statement type = %d\n", CCI_QUERY_RESULT_STMT_TYPE (result, i));
      }
  }
...

From the modified version, entire queries are regarded as failure if an error occurs. In case that no error occurred, it is determined whether each query in the array succeeds or not.

...
char *query = "INSERT INTO test_data (id, ndata, cdata, sdata, ldata) VALUES (?, ?, 'A', 'ABCD', 1234)";
...
req = cci_prepare (con, query, 0, &cci_error);
...
error = cci_bind_param_array_size (req, 3);
...
error = cci_bind_param_array (req, 1, CCI_A_TYPE_INT, co_ex, null_ind, CCI_U_TYPE_INT);
...
n_executed = cci_execute_array (req, &result, &cci_error);
if (n_executed < 0)
  {
    printf ("execute error: %d, %s\n", cci_error.err_code, cci_error.err_msg);
  }
else
  {
    for (i = 1; i <= 3; i++)
      {
        printf ("query %d\n", i);
        printf ("result count = %d\n", CCI_QUERY_RESULT_RESULT (result, i));
        printf ("error message = %s\n", CCI_QUERY_RESULT_ERR_MSG (result, i));
        printf ("statement type = %d\n", CCI_QUERY_RESULT_STMT_TYPE (result, i));
      }
  }
...

In java.sql.XAConnection interface, HOLD_CURSORS_OVER_COMMIT is not supported(CUBRIDSUS-10800)

Current CUBRID does not support ResultSet.HOLD_CURSORS_OVER_COMMIT in java.sql.XAConnection interface.

From 9.0, STRCMP behaves case-sensitively

Until the previous version of 9.0, STRCMP did not distinguish an uppercase and a lowercase. From 9.0, it compares the strings case-sensitively. To make STRCMP case-insensitive, you should use case-insensitive collation(e.g.: utf8_en_ci).

-- In previous version of 9.0 STRCMP works case-insensitively
SELECT STRCMP ('ABC','abc');
0

-- From 9.0 version, STRCMP distinguish the uppercase and the lowercase when the collation is case-sensitive.
export CUBRID_CHARSET=en_US.iso88591

SELECT STRCMP ('ABC','abc');
-1

-- If the collation is case-insensitive, it distinguish the uppercase and the lowercase.
export CUBRID_CHARSET=en_US.iso88591

SELECT STRCMP ('ABC' COLLATE utf8_en_ci ,'abc' COLLATE utf8_en_ci);
0

Since the 2008 R4.1 version, the Default value of CCI_DEFAULT_AUTOCOMMIT has been ON(CUBRIDSUS-5879)

The default value for the CCI_DEFAULT_AUTOCOMMIT broker parameter, which affects the auto commit mode for applications developed with CCI interface, has been changed to ON since CUBRID 2008 R4.1. As a result of this change, CCI and CCI-based interface (PHP, ODBC, OLE DB etc.) users should check whether or not the application’s auto commit mode is suitable for this.

From the 2008 R4.0 version, the options and parameters that use the unit of pages were changed to use the unit of volume size(CUBRIDSUS-5136)

The options (-p, -l, -s), which use page units to specify the database volume size and log volume size of the cubrid createdb utility, will be removed. Instead, the new options, added after 2008 R4.0 Beta (–db-volume-size, –log-volume-size, –db-page-size, –log-page-size), are used.

To specify the database volume size of the cubrid addvoldb utility, use the newly-added option (–db-volume-size) after 2008 R4.0 Beta instead of using the page unit. It is recommended to use the new system parameters in bytes because the page-unit system parameters will be removed. For details on the related system parameters, see the below.

Be cautious when setting db volume size if you are a user of a version before 2008 R4.0 Beta(CUBRIDSUS-4222)

From the 2008 R4.0 Beta version, the default value of data page size and log page size in creating the database was changed from 4 KB to 16 KB. If you specify the database volume to the page count, the byte size of the volume may differ from your expectations. If you did not set any options, 100MB-database volume with 4KB-page size was created in the previous version. However, starting from the 2008 R4.0, 512MB-database volume with 16KB-page size is created.

In addition, the minimum size of the available database volume is limited to 20 MB. Therefore, a database volume less than this size cannot be created.

The change of the default value of some system parameters of the versions before 2008 R4.0(CUBRIDSUS-4095)

Starting from 2008 R4.0, the default values of some system parameters have been changed.

Now, the default value of max_clients, which specifies the number of concurrent connections allowed by a DB server, and the default value of index_unfill_factor that specifies the ratio of reserved space for future updates while creating an index page, have been changed. Furthermore, the default values of the system parameters in bytes now use more memory when they exceed the default values of the previous system parameters per page.

Previous System Parameter	Added System Parameter	Previous Default Value	Changed Default Value (unit: byte)
max_clients	None	50	100
index_unfill_factor	None	0.2	0.05
data_buffer_pages	data_buffer_size	100M(page size=4K)	512M
log_buffer_pages	log_buffer_size	200K(page size=4K)	4M
sort_buffer_pages	sort_buffer_size	64K(page size=4K)	2M
index_scan_oid_buffer_pages	index_scan_oid_buffer_size	16K(page size=4K)	64K

In addition, when a database is created using cubrid createdb, the minimum value of the data page size and the log page size has been changed from 1K to 4K.

Changed so that database services, utilities, and applications cannot be executed when the system parameter is incorrectly configured(CUBRIDSUS-5375)

It has been changed so that now the related database services, utilities, and applications are not executed when configuring system parameters that are not defined in cubrid.conf or cubrid_ha.conf, when the value of system parameters exceed the threshold, or when the system parameters per page and the system parameters in bytes are used simultaneously.

Database fails to start if the data_buffer_size is configured with a value that exceeds 2G in CUBRID 32-bit version(CUBRIDSUS-5349)

In the CUBRID 32-bit version, if the value of data_buffer_size exceeds 2G, the running database fails. Note that the configuration value cannot exceed 2G in the 32-bit version because of the OS limit.

Recommendations for controlling services with the CUBRID Utility in Windows Vista and higher(CUBRIDSUS-4186)

To control services using cubrid utility from Windows Vista and higher, it is recommended to start the command prompt window with administrative privileges.

If you don’t start the command prompt window with administrative privileges and use the cubrid utility, you can still execute it with administrative privileges through the User Account Control (UAC) dialog box, but you will not be able to verify the resulting messages.

The procedures for starting the command prompt window as an administrator in Windows Vista and higher are as follows:

• Right-click [Start > All Programs > Accessories > Command Prompt].

• When [Execute as an administrator (A)] is selected, a dialog box to verify the privilege escalation is activated. Click “YES” to start with administrative privileges.

A manager server process-related error occurs in the execution of the CUBRID source after its build(CUBRIDSUS-3553)

If users want to build the CUBRID source and install it themselves, they must build and install CUBRID and the CUBRID Manager respectively. If you check out only CUBRID source and run cubrid service start or cubrid manager start after build, the error “cubrid manager server is not installed” will occur.

GLO class which is used in 2008 r3.0 or before is not supported any longer(CUBRIDSUS-3826)

CUBRID 2008 R3.0 and earlier versions processed Large Objects with the Generalized Large Object glo class, but the glo class has been removed from CUBRID 2008 R3.1 and later versions. Instead, they support BLOB and CLOB (LOB from this point forward) data types. (See BLOB/CLOB Data Types for more information about LOB data types).

glo class users are recommended to carry out tasks as follows:

• After saving GLO data as a file, modify to not use GLO in any application and DB schema.

• Implement DB migration by using the unloaddb and loaddb utilities.

• Perform tasks to load files into LOB data according to the modified application.

• Verify the application that you modified operates normally.

For reference, if the cubrid loaddb utility loads a table that inherits the GLO class or has the GLO class type, it stops the data from loading by displaying an error message, “Error occurred during schema loading.”

With the discontinued support of GLO class, the deleted functions for each interface are as follows:

Interface	Deleted Functions
CCI	cci_glo_append_data cci_glo_compress_data cci_glo_data_size cci_glo_delete_data cci_glo_destroy_data cci_glo_insert_data cci_glo_load cci_glo_new cci_glo_read_data cci_glo_save cci_glo_truncate_data cci_glo_write_data
JDBC	CUBRIDConnection.getNewGLO CUBRIDOID.loadGLO CUBRIDOID.saveGLO
PHP	cubrid_new_glo cubrid_save_to_glo cubrid_load_from_glo cubrid_send_glo

Port configuration is required if the protocol between the master and server processes is changed, or if two versions are running at the same time(CUBRIDSUS-3564)

Because the communication protocol between a master process (cub_master) and a server process (cub_server) has been changed, the master process of CUBRID 2008 R3.0 or later cannot communicate with the server process of a lower version, and the master process of a lower version cannot communicate with a server process of 2008 R3.0 version or later. Therefore, if you run two versions of CUBRID at the same time by adding a new version in an environment where a lower version has already been installed, you should modify the cubrid_port_id system parameter of cubrid.conf so that different ports are used by the different versions.

Specifying a question mark when entering connection information as a URL string in JDBC(CUBRIDSUS-3217)

When entering connection information as a URL string in JDBC, property information was applied even if you did not enter a question mark (?) in the earlier version. However, you must specify a question mark depending on syntax in this CUBRID 2008 R3.0 version. If not, an error is displayed. In addition, you must specify colon (:) even if there is no username or password in the connection information.

URL=jdbc:CUBRID:127.0.0.1:31000:db1:::altHosts=127.0.0.2:31000,127.0.0.3:31000 -- Error
URL=jdbc:CUBRID:127.0.0.1:31000:db1:::?altHosts=127.0.0.2:31000,127.0.0.3:31000 -- Normal

Not allowed to include @ in a database name(CUBRIDSUS-2828)

If @ is included in a database name, it can be interpreted that a host name has been specified. To prevent this, a revision has been made so that @ cannot be included in a database name when running cubrid createdb, cubrid renamedb and cubrid copydb utilities.