excelif两个条件如何写举例说明
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2023-11-13
(PHP 4 >= 4.0.3, PHP 5)
pg_put_line — 向 PostgreSQL 后端发送以 NULL 结尾的字符串
说明
bool pg_put_line ([ resource$connection
], string $data
)
pg_put_line() 向 PostgreSQL 后端服务器发送以 NULL 结尾的字符串。例如可以通过 PostgreSQL 的 COPY 操作来向表中高速插入数据。结尾的 NULL 字符会自动加入。
COPY is a high-speed data loading interface supported by PostgreSQL. Data is passed in without being parsed, and in a single transaction.
An alternative to using raw pg_put_line() commands is to use pg_copy_from(). This is a far simpler interface.
Note:
应用程序必须明确地在 pg_end_copy() 之前最后一行发送两个字符 "." 来向后端指明发送数据结束。
WarningUse of the pg_put_line() causes most large object operations, including pg_lo_read() and pg_lo_tell(), to subsequently fail. You can use pg_copy_from() and pg_copy_to() instead.
参数
connection
PostgreSQL database connection resource. When
connection is not present, the default connection
is used. The default connection is the last connection made by
pg_connect() or pg_pconnect().
data
A line of text to be sent directly to the PostgreSQL backend. A NULL terminator is added automatically.
返回值
成功时返回 TRUE， 或者在失败时返回 FALSE。
范例
Example #1 pg_put_line() 例子
<?php
$conn = pg_pconnect("dbname=foo");
pg_query($conn, "create table bar (a int4, b char(16), d float8)");
pg_query($conn, "copy bar from stdin");
pg_put_line($conn, "3thello worldt4.5n");
pg_put_line($conn, "4tgoodbye worldt7.11n");
pg_put_line($conn, ".n");
pg_end_copy($conn);
?>
参见
pg_end_copy() - 与 PostgreSQL 后端同步
