Class: DBI::DBD::Pg::PgExecutorAsync

Inherits:
PgExecutor show all
Defined in:
lib/dbd/pg/exec.rb

Overview

Asynchronous implementation of PgExecutor, useful for 'green thread' implementations (e.g., MRI <= 1.8.x) which would otherwise suspend other threads while awaiting query results. -- FIXME: PQsetnonblocking + select/poll would make the exec*

methods truly 'async', though this is rarely needed in
practice.

Instance Method Summary collapse

Methods inherited from PgExecutor

#initialize

Constructor Details

This class inherits a constructor from DBI::DBD::Pg::PgExecutor

Instance Method Details

#exec(sql, parameters = nil) ⇒ Object



31
32
33
# File 'lib/dbd/pg/exec.rb', line 31

def exec(sql, parameters = nil)
    @pg_conn.async_exec(sql, parameters)
end

#exec_prepared(stmt_name, parameters = nil) ⇒ Object



35
36
37
38
39
# File 'lib/dbd/pg/exec.rb', line 35

def exec_prepared(stmt_name, parameters = nil)
    @pg_conn.send_query_prepared(stmt_name, parameters)
    @pg_conn.block()
    @pg_conn.get_last_result()
end

#prepare(stmt_name, sql) ⇒ Object



41
42
43
44
45
# File 'lib/dbd/pg/exec.rb', line 41

def prepare(stmt_name, sql)
    @pg_conn.send_prepare(stmt_name, sql)
    @pg_conn.block()
    @pg_conn.get_last_result()
end