ibase_gen_id
(PHP 5)
ibase_gen_id — Increments the named generator and returns its new value
Описание
mixed ibase_gen_id
( string
$generator
[, int $increment = 1
[, resource $link_identifier = NULL
]] )Внимание
К настоящему времени эта функция еще не была документирована; для ознакомления доступен только список аргументов.
Возвращаемые значения
Returns new generator value as integer, or as string if the value is too big.
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Расширения для работы с базами данных
- Расширения для работы с базами данных отдельных производителей
- Firebird/InterBase
- ibase_add_user
- ibase_affected_rows
- ibase_backup
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- ibase_blob_create
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- ibase_fetch_assoc
- ibase_fetch_object
- ibase_fetch_row
- ibase_field_info
- ibase_free_event_handler
- ibase_free_query
- ibase_free_result
- ibase_gen_id
- ibase_maintain_db
- ibase_modify_user
- ibase_name_result
- ibase_num_fields
- ibase_num_params
- ibase_param_info
- ibase_pconnect
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- ibase_service_attach
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- ibase_set_event_handler
- ibase_trans
- ibase_wait_event
Коментарии
Question arose on php-dev:
How does ibase_gen_id() handle 64bit values?
Interbase 6/Firebird generators are always 64-bit signed integers
(Firebird's BIGINT type), regardless of the platform the client is
running.
On 64-bit platforms, this will never require conversion as PHP's int
type is 64 bits wide on those platforms. On 32-bit platforms, the
generated value is converted to a string if it exceeds the limits of a
32-bit signed integer.
(This behaviour is consistent with the ibase_fetch_*() functions, that
will use strings to represent numerical values that cannot be represented
accurately using native PHP numerical types.)
[Edited by PHP/Interbase maintainer.]
$sql="INSERT INTO mitabla(campo1,campo2,..campo n) VALUES(GEN_ID(mitabla1_codigo_gen,1),'contenido 1', 'contenido 2', 'contenido n' )";EXAMPLE:
You need to know the generator´s value after INSERT:
Before INSERT-Statement run
$nextnumber=ibase_gen_id ("GEN_NAME",1);
GEN_NAME: is the generator´s name
1: means add 1 to actual value of generator
$nextnumber: is variable to store generators value after incrementing
In the INSERT-Statement you can use $nextnumber instead of using generator directly like in:
INSERT INTO test (field1, field2) VALUES gen_id(gen_test_id, 1), 'testme');