CUBRID Functions (PDO_CUBRID)

简介

PDO_CUBRID is a driver that implements the PHP Data Objects (PDO) interface to enable access from PHP to CUBRID databases.

注意:
Current version of PDO_CUBRID doesn't support persistent connection now.

安装

To build the PDO_CUBRID extension, the CUBRID DBMS must be installed on the same system as PHP. PDO_CUBRID is a » PECL extension, so follow the instructions in PECL 扩展安装 to install the PDO_CUBRID extension. Issue the configure command to point to the location of the CUBRID base dir as follows:

   $ ./configure --with-pdo-cubrid=/path/to/CUBRID[,shared]

The configure command defaults to the value of the CUBRID environment variable.

PECL 扩展的 DLL 当前不可用。参见在 Windows 上构建章节。 Detailed information about installation on Linux and Windows manually, please read build-guide.html in PECL package CUBRID for reference.

PDO_CUBRID Features

Scrollable cursors

PDO_CUBRID supports scrollable cursors. The default cursor type is forward only, and you can use parameter driver_options in PDO::prepare() to change cursor type.

Timeout

PDO_CUBRID supports sql statement execution timeout setting; You can use PDO::setAttribute() to set timeout value.

Autocommit_mode and Transaction

PDO_CUBRID supports both autocommit_mode and transaction, and autocommit_mode is enabled by default. You can use PDO::setAttribute() to change its state.

If you use PDO::beginTransaction() to begin a transaction, it will disable autocommit_mode automatically and restore it after PDO::commit() or PDO::rollBack().

注意: Prior do disabling autocommit_mode any pending work is automatically committed.

Multiple SQL Statements

PDO_CUBRID supports Multiple SQL statements. Multiple SQL statements are separated by semicolons (;).

Schema Information

PDO_CUBRID implements PDO::cubrid_schema() to get schema information.

LOBs

PDO_CUBRID supports BLOB/CLOB data type. The LOB in PDO is represented as a stream, so you can insert LOBs by binding a stream, and get LOBs by reading a stream returned by CUBRID PDO. For example:

示例 #1 Insert LOBs in CUBRID PDO

<?php
$fp = fopen('lob_test.png', 'rb');

$sql_stmt = "INSERT INTO lob_test(name, content) VALUES('lob_test.png', ?)";

$stmt = $dbh->prepare($sql_stmt);
$ret = $stmt->bindParam(1, $fp, PDO::PARAM_LOB);
$ret = $stmt->execute();
?>

示例 #2 Fetch LOBs in CUBRID PDO

<?php
$sql_stmt = "SELECT content FROM lob_test WHERE name='lob_test.png'";

$stmt = $dbh->prepare($sql_stmt);
$stmt->execute();
$result = $stmt->fetch(PDO::FETCH_NUM);

header("Content-Type: image/png");
fpassthru($result[0]);
?>

Column meta

The PDOStatement::getColumnMeta() in CUBRID PDO will return an associative array containing the following values:

type
name
table
def
precision
scale
not_null
auto_increment
unique_key
multiple_key
primary_key
foreign_key
reverse_index
reverse_unique

Collection Data Type

PDO_CUBRID supports SET/MULTISET/SEQUENCE data type. If you don't specify data type, the default data type is char. For example:

示例 #3 Insert set in CUBRID PDO with default data type.

<?php
$conn_str ="cubrid:dbname=demodb;host=localhost;port=33000";
$cubrid_pdo = new PDO($conn_str, 'dba', '');

$cubrid_pdo->exec("DROP TABLE if exists test_tbl"); 
$cubrid_pdo->exec("CREATE TABLE test_tbl (col_1 SET(VARCHAR))");
 
$sql_stmt_insert = "INSERT INTO test_tbl VALUES (?);";
$stmt = $cubrid_pdo->prepare($sql_stmt_insert);
$data = array("abc","def","ghi");
$ret = $stmt->bindParam(1, $data, PDO::PARAM_NULL);
$ret = $stmt->execute();
var_Dump($ret);
?>

示例 #4 Specify data type when insert set in CUBRID PDO

<?php
$conn_str ="cubrid:dbname=demodb;host=localhost;port=33000";
$cubrid_pdo = new PDO($conn_str, 'dba', '');

$cubrid_pdo->exec("DROP TABLE if exists test_tbl"); 
$cubrid_pdo->exec("CREATE TABLE test_tbl (col_1 SET(int))");
 
$sql_stmt_insert = "INSERT INTO test_tbl VALUES (?);";
$stmt = $cubrid_pdo->prepare($sql_stmt_insert);
$data = array(1,2,3,4);
$ret = $stmt->bindParam(1, $data, 0,0,"int");
$ret = $stmt->execute();
var_Dump($ret);
?>

CUBRID Bind Data Types for the fifth parameter of PDOStatement::bindParam():

CHAR
STRING
NCHAR
VARNCHAR
BIT
VARBIT
NUMERIC
NUMBER
INT
SHORT
BIGINT
MONETARY
FLOAT
DOUBLE
DATE
TIME
DATETIME
TIMESTAMP

预定义常量

下列常量由此驱动定义，且仅在扩展编译入 PHP 或在运行时动态载入时可用。另外，使用此驱动时，仅会使用这些驱动特定的常量。使用其他驱动的驱动特定的常量可能会导致不可预见的情况。如果代码可运行于多个驱动，PDO::getAttribute() 可被用于获取 PDO_ATTR_DRIVER_NAME 属性以检查驱动。

The following constants can be used when setting the database attribute. They can be passed to PDO::getAttribute() or PDO::setAttribute().

**PDO::CUBRID attribute flags**
Constant	Description
`PDO::CUBRID_ATTR_ISOLATION_LEVEL`	Transaction isolation level for the database connection.
`PDO::CUBRID_ATTR_LOCK_TIMEOUT`	Transaction timeout in seconds.
`PDO::CUBRID_ATTR_MAX_STRING_LENGTH`	Read only. The maximum string length for bit, varbit, char, varchar, nchar, nchar varying data types when using CUBRID PDO API.

The following constants can be used when setting the transaction isolation level. They can be passed to PDO::getAttribute() or returned by PDO::setAttribute().

**PDO::CUBRID isolation level flags**
Constant	Description
`PDO::TRAN_COMMIT_CLASS_UNCOMMIT_INSTANCE`	The lowest isolation level (1). A dirty, non-repeatable or phantom read may occur for the tuple and a non-repeatable read may occur for the table as well.
`PDO::TRAN_COMMIT_CLASS_COMMIT_INSTANCE`	A relatively low isolation level (2). A dirty read does not occur, but non-repeatable or phantom read may occur.
`PDO::TRAN_REP_CLASS_UNCOMMIT_INSTANCE`	The default isolation of CUBRID (3). A dirty, non-repeatable or phantom read may occur for the tuple, but repeatable read is ensured for the table.
`PDO::TRAN_REP_CLASS_COMMIT_INSTANCE`	A relatively low isolation level (4). A dirty read does not occur, but non-repeatable or phantom read may.
`PDO::TRAN_REP_CLASS_REP_INSTANCE`	A relatively high isolation level (5). A dirty or non-repeatable read does not occur, but a phantom read may.
`PDO::TRAN_SERIALIZABLE`	The highest isolation level (6). Problems concerning concurrency (e.g. dirty read, non-repeatable read, phantom read, etc.) do not occur.

The following constants can be used when getting schema information. They can be passed to PDO::cubrid_schema().

**PDO::CUBRID schema flags**
Constant	Description
`PDO::CUBRID_SCH_TABLE`	Get name and type of table in CUBRID.
`PDO::CUBRID_SCH_VIEW`	Get name and type of view in CUBRID.
`PDO::CUBRID_SCH_QUERY_SPEC`	Get the query definition of view.
`PDO::CUBRID_SCH_ATTRIBUTE`	Get the attributes of table column.
`PDO::CUBRID_SCH_TABLE_ATTRIBUTE`	Get the attributes of table.
`PDO::CUBRID_SCH_METHOD`	Get the instance method. The instance method is a method called by a class instance. It is used more often than the class method because most operations are executed in the instance.
`PDO::CUBRID_SCH_TABLE_METHOD`	Get the class method. The class method is a method called by a class object. It is usually used to create a new class instance or to initialize it. It is also used to access or update class attributes.
`PDO::CUBRID_SCH_METHOD_FILE`	Get the information of the file where the method of the table is defined.
`PDO::CUBRID_SCH_SUPER_TABLE`	Get the name and type of table which table inherites attributes from.
`PDO::CUBRID_SCH_SUB_TABLE`	Get the name and type of table which inherites attributes from this table.
`PDO::CUBRID_SCH_CONSTRAINT`	Get the table constraints.
`PDO::CUBRID_SCH_TRIGGER`	Get the table triggers.
`PDO::CUBRID_SCH_TABLE_PRIVILEGE`	Get the privilege information of table.
`PDO::CUBRID_SCH_COL_PRIVILEGE`	Get the privilege information of column.
`PDO::CUBRID_SCH_DIRECT_SUPER_TABLE`	Get the direct super table of table.
`PDO::CUBRID_SCH_PRIMARY_KEY`	Get the table primary key.
`PDO::CUBRID_SCH_IMPORTED_KEYS`	Get imported keys of table.
`PDO::CUBRID_SCH_EXPORTED_KEYS`	Get exported keys of table.
`PDO::CUBRID_SCH_CROSS_REFERENCE`	Get reference relationship of tow tables.