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# db2_server_info

(no version information, might be only in CVS)

db2_server_info -- Returns an object with properties that describe the DB2 database server

## Описание

object db2_server_info ( resource connection )

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()

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db2_rollback | Уровень выше | db2_set_option