This function returns an object with read-only properties that return information about the IBM DB2, Cloudscape, or Apache Derby database server. The following table lists the database server properties:

Таблица 1. Database server properties

Property name	Return type	Description
DBMS_NAME	string	The name of the database server to which you are connected. For DB2 servers this is a combination of `DB2` followed by the operating system on which the database server is running.
DBMS_VER	string	The version of the database server, in the form of a string "MM.mm.uuuu" where `MM` is the major version, `mm` is the minor version, and `uuuu` is the update. For example, "08.02.0001" represents major version 8, minor version 2, update 1.
DB_CODEPAGE	int	The code page of the database to which you are connected.
DB_NAME	string	The name of the database to which you are connected.
DFT_ISOLATION	string	The default transaction isolation level supported by the server: UR Uncommitted read: changes are immediately visible by all concurrent transactions. CS Cursor stability: a row read by one transaction can be altered and committed by a second concurrent transaction. RS Read stability: a transaction can add or remove rows matching a search condition or a pending transaction. RR Repeatable read: data affected by pending transaction is not available to other transactions. NC No commit: any changes are visible at the end of a successful operation. Explicit commits and rollbacks are not allowed.
IDENTIFIER_QUOTE_CHAR	string	The character used to delimit an identifier.
INST_NAME	string	The instance on the database server that contains the database.
ISOLATION_OPTION	array	An array of the isolation options supported by the database server. The isolation options are described in the DFT_ISOLATION property.
KEYWORDS	array	An array of the keywords reserved by the database server.
LIKE_ESCAPE_CLAUSE	bool	`TRUE` if the database server supports the use of `%` and `_` wildcard characters. `FALSE` if the database server does not support these wildcard characters.
MAX_COL_NAME_LEN	int	Maximum length of a column name supported by the database server, expressed in bytes.
MAX_IDENTIFIER_LEN	int	Maximum length of an SQL identifier supported by the database server, expressed in characters.
MAX_INDEX_SIZE	int	Maximum size of columns combined in an index supported by the database server, expressed in bytes.
MAX_PROC_NAME_LEN	int	Maximum length of a procedure name supported by the database server, expressed in bytes.
MAX_ROW_SIZE	int	Maximum length of a row in a base table supported by the database server, expressed in bytes.
MAX_SCHEMA_NAME_LEN	int	Maximum length of a schema name supported by the database server, expressed in bytes.
MAX_STATEMENT_LEN	int	Maximum length of an SQL statement supported by the database server, expressed in bytes.
MAX_TABLE_NAME_LEN	int	Maximum length of a table name supported by the database server, expressed in bytes.
NON_NULLABLE_COLUMNS	bool	`TRUE` if the database server supports columns that can be defined as NOT NULL, `FALSE` if the database server does not support columns defined as NOT NULL.
PROCEDURES	bool	`TRUE` if the database server supports the use of the CALL statement to call stored procedures, `FALSE` if the database server does not support the CALL statement.
SPECIAL_CHARS	string	A string containing all of the characters other than a-Z, 0-9, and underscore that can be used in an identifier name.
SQL_CONFORMANCE	string	The level of conformance to the ANSI/ISO SQL-92 specification offered by the database server: ENTRY Entry-level SQL-92 compliance. FIPS127 FIPS-127-2 transitional compliance. FULL Full level SQL-92 compliance. INTERMEDIATE Intermediate level SQL-92 compliance.

Список параметров

connection: Specifies an active DB2 client connection.

Возвращаемые значения

Returns an object on a successful call. Returns FALSE on failure.

Примеры

Пример 1. A db2_server_info() example
To retrieve information about the server, you must pass a valid database connection resource to db2_server_info().
<?php $conn = db2_connect('sample', 'db2inst1', 'ibmdb2'); $server = db2_server_info( $conn ); if ($server) { echo "DBMS_NAME: "; var_dump( $server->DBMS_NAME ); echo "DBMS_VER: "; var_dump( $server->DBMS_VER ); echo "DB_CODEPAGE: "; var_dump( $server->DB_CODEPAGE ); echo "DB_NAME: "; var_dump( $server->DB_NAME ); echo "INST_NAME: "; var_dump( $server->INST_NAME ); echo "SPECIAL_CHARS: "; var_dump( $server->SPECIAL_CHARS ); echo "KEYWORDS: "; var_dump( sizeof($server->KEYWORDS) ); echo "DFT_ISOLATION: "; var_dump( $server->DFT_ISOLATION ); echo "ISOLATION_OPTION: "; $il = ''; foreach( $server->ISOLATION_OPTION as $opt ) { $il .= $opt." "; } var_dump( $il ); echo "SQL_CONFORMANCE: "; var_dump( $server->SQL_CONFORMANCE ); echo "PROCEDURES: "; var_dump( $server->PROCEDURES ); echo "IDENTIFIER_QUOTE_CHAR: "; var_dump( $server->IDENTIFIER_QUOTE_CHAR ); echo "LIKE_ESCAPE_CLAUSE: "; var_dump( $server->LIKE_ESCAPE_CLAUSE ); echo "MAX_COL_NAME_LEN: "; var_dump( $server->MAX_COL_NAME_LEN ); echo "MAX_ROW_SIZE: "; var_dump( $server->MAX_ROW_SIZE ); echo "MAX_IDENTIFIER_LEN: "; var_dump( $server->MAX_IDENTIFIER_LEN ); echo "MAX_INDEX_SIZE: "; var_dump( $server->MAX_INDEX_SIZE ); echo "MAX_PROC_NAME_LEN: "; var_dump( $server->MAX_PROC_NAME_LEN ); echo "MAX_SCHEMA_NAME_LEN: "; var_dump( $server->MAX_SCHEMA_NAME_LEN ); echo "MAX_STATEMENT_LEN: "; var_dump( $server->MAX_STATEMENT_LEN ); echo "MAX_TABLE_NAME_LEN: "; var_dump( $server->MAX_TABLE_NAME_LEN ); echo "NON_NULLABLE_COLUMNS: "; var_dump( $server->NON_NULLABLE_COLUMNS ); db2_close($conn); } ?>
Результат выполнения данного примера:
DBMS_NAME: string(9) "DB2/LINUX" DBMS_VER: string(10) "08.02.0000" DB_CODEPAGE: int(1208) DB_NAME: string(6) "SAMPLE" INST_NAME: string(8) "db2inst1" SPECIAL_CHARS: string(2) "@#" KEYWORDS: int(179) DFT_ISOLATION: string(2) "CS" ISOLATION_OPTION: string(12) "UR CS RS RR " SQL_CONFORMANCE: string(7) "FIPS127" PROCEDURES: bool(true) IDENTIFIER_QUOTE_CHAR: string(1) """ LIKE_ESCAPE_CLAUSE: bool(true) MAX_COL_NAME_LEN: int(30) MAX_ROW_SIZE: int(32677) MAX_IDENTIFIER_LEN: int(18) MAX_INDEX_SIZE: int(1024) MAX_PROC_NAME_LEN: int(128) MAX_SCHEMA_NAME_LEN: int(30) MAX_STATEMENT_LEN: int(2097152) MAX_TABLE_NAME_LEN: int(128) NON_NULLABLE_COLUMNS: bool(true)

Смотрите также

db2_client_info()

Пред.	Начало	След.
db2_rollback	Уровень выше	db2_special_columns

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