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pg_send_query
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pg_send_query

(PHP 4 >= 4.2.0, PHP 5)

pg_send_query --  Sends asynchronous query

Popis

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.

Seznam parametrů

connection

PostgreSQL database connection resource.

query

The SQL statement or statements to be executed.

Návratové hodnoty

Vrací TRUE při úspěchu, FALSE při selhání.

Use pg_get_result() to determine the query result.

Příklady

Příklad 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";
?>

Výše uvedený příklad vypíše:

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

Viz také

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

PředcházejícíDomůDalší
pg_send_query_paramsNahoru