WeberDev.com -> PHP Manual -> 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

pg_send_query

Description

Parameters

Return Values

Examples

See Also