"It issues COPY TO SQL command internally to insert records"
I suspect this statement is incorrect, or that s/insert/retrieve/ is appropriate.
(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
pg_copy_to — 将表复制到数组
$connection
,$table_name
,$separator
= "\t",$null_as
= "\\\\N"
pg_copy_to() 将表复制到数组。在内部发出 COPY TO
命令来检索记录。
connection
PgSql\Connection 实例。
table_name
从表中将数据复制到 rows
中的表名。
separator
rows
的每个元素分割为每个字段的值的标记。默认为 \t
。
null_as
SQL NULL
值在 rows
中的表示方式。默认为 \\N
("\\\\N"
)。
版本 | 说明 |
---|---|
8.1.0 |
现在 connection 参数接受 PgSql\Connection
实例,之前接受 resource。
|
示例 #1 pg_copy_to() 示例
<?php
$db = pg_connect("dbname=publisher") or die("Could not connect");
$rows = pg_copy_to($db, $table_name);
pg_query($db, "DELETE FROM $table_name");
pg_copy_from($db, $table_name, $rows);
?>
"It issues COPY TO SQL command internally to insert records"
I suspect this statement is incorrect, or that s/insert/retrieve/ is appropriate.
Worth noting here that just like the COPY TO statement in PostgreSQL, '$table_name' can include a list of columns or be a select query as well.
e.g.:
$rows = pg_copy_to($db,'schema."TableName" (column1, column2, ...)';
$rows = pg_copy_to($db,'(SELECT ...)');
You cannot specify the schema name in this command. You can change the search path for just one query by using the following code:
<?php
pg_query($conn, "SET search_path TO myschema;");
$copy_to = pg_copy_to($conn, 'tablename');
pg_query("RESET search_path;");
?>