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# pg_send_query

(PHP 4 >= 4.2.0, PHP 5)

pg_send_query -- Sends asynchronous query

## Description

bool pg_send_query ( resource connection, string query )

pg_send_query() sends a query or queries asynchronously to the connection. Unlike pg_query(), it can send multiple queries at once to PostgreSQL and get the results one by one using pg_get_result().

Script execution is not blocked while the queries are executing. Use pg_connection_busy() to check if the connection is busy (i.e. the query is executing). Queries may be cancelled using pg_cancel_query().

Although the user can send multiple queries at once, multiple queries cannot be sent over a busy connection. If a query is sent while the connection is busy, it waits until the last query is finished and discards all its results.

## Parameters

connection

  PostgreSQL database connection resource.

query

  The SQL statement or statements to be executed.

## Return Values

Returns `TRUE` on success or `FALSE` on failure.

Use pg_get_result() to determine the query result.

## Examples

Example 1. pg_send_query() example
`<?php $dbconn = pg_connect("dbname=publisher") or die("Could not connect"); if (!pg_connection_busy($dbconn)) { pg_send_query($dbconn, "select * from authors; select count(*) from authors;"); } $res1 = pg_get_result($dbconn); echo "First call to pg_get_result(): $res1\n"; $rows1 = pg_num_rows($res1); echo "$res1 has $rows1 records\n\n"; $res2 = pg_get_result($dbconn); echo "Second call to pg_get_result(): $res2\n"; $rows2 = pg_num_rows($res2); echo "$res2 has $rows2 records\n"; ?>`
The above example will output:
    First call to pg_get_result(): Resource id #3
    Resource id #3 has 3 records

    Second call to pg_get_result(): Resource id #4
    Resource id #4 has 1 records

## See Also

pg_query()
pg_cancel_query()
pg_get_result()
pg_connection_busy()

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