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Jifty::DBI::Handle(3) User Contributed Perl DocumentationJifty::DBI::Handle(3)

       Jifty::DBI::Handle - Perl extension which is a generic DBI handle

	 use Jifty::DBI::Handle;

	 my $handle = Jifty::DBI::Handle->new();
	 $handle->connect( driver => 'mysql',
			   database => 'dbname',
			   host	=> 'hostname',
			   user	=> 'dbuser',
			   password => 'dbpassword');
	 # now $handle isa Jifty::DBI::Handle::mysql

       This class provides a wrapper for DBI handles that can also perform a
       number of additional functions.

       Generic constructor

   connect PARAMHASH
       Takes a paramhash and connects to your DBI datasource, with the keys
       "driver", "database", "host", "user" and	"password".

       If you created the handle with
	    Jifty::DBI::Handle->new and	there is a
       Jifty::DBI::Handle::(Driver) subclass for the driver you	have chosen,
       the handle will be automatically	"upgraded" into	that subclass.

       If there	is an error, an	exception will be thrown. If a connection has
       already been established	and is still active, "undef" will be returned
       (which is not an	error).	Otherwise, if a	new connection is made,	a true
       value will be returned.

   _upgrade_handle DRIVER
       This private internal method turns a plain Jifty::DBI::Handle into one
       of the standard driver-specific subclasses.

   build_dsn PARAMHASH
       Builds a	dsn suitable for handing to DBI->connect.

       Mandatory arguments:


       Optional	arguments:

       and anything else your DBD lets you pass	in

       Returns the dsn for this	database connection.

   raise_error [MODE]
       Turns on	the Database Handle's RaiseError attribute.

   print_error [MODE]
       Turns on	the Database Handle's PrintError attribute.

   log MESSAGE
       Takes a single argument,	a message to log.

       Currently prints	that message to	STDERR

   log_sql_statements BOOL
       Takes a boolean argument. If the	boolean	is true, it will log all SQL
       statements, as well as their invocation times and execution times.

       Returns whether we're currently logging or not as a boolean

   log_sql_hook	NAME [,	CODE]
       Used in instrumenting the SQL logging. You can use this to, for
       example,	get a stack trace for each query (so you can find out where
       the query is being made).  The name is required so that multiple	hooks
       can be installed, and inspected,	by name.

       The coderef is run in scalar context and	(currently) receives no

       If you don't pass CODE in, then the coderef currently assigned under
       NAME is returned.

       add an SQL statement to our query log

       Clears out the SQL statement log.

       Returns the current SQL statement log as	an array of arrays. Each entry
       is a list of:

       (Time, Statement, [Bindings], Duration, {HookResults})

       Bindings	is an arrayref of the values of	any placeholders. HookResults
       is a hashref keyed by hook name.

   auto_commit [MODE]
       Turns on	the Database Handle's Autocommit attribute.

       disconnect from your DBI	datasource

   dbh [HANDLE]
       Return the current DBI handle. If we're handed a	parameter, make	the
       database	handle that.

   delete $table_NAME @KEY_VALUE_PAIRS
       Takes a table name and a	set of key-value pairs in an array. splits the
       key value pairs,	constructs an DELETE statement and performs the
       delete. Returns the row_id of this row.

   insert $table_NAME @KEY_VALUE_PAIRS
       Takes a table name and a	set of key-value pairs in an array. splits the
       key value pairs,	constructs an INSERT statement and performs the
       insert. Returns the row_id of this row.

       Takes a hash with columns: "table", "column", "value", "primary_keys",
       and "is_sql_function".  The first two should be obvious;	"value"	is
       where you set the new value you want the	column to have.	The
       "primary_keys" column should be the lvalue of
       Jifty::DBI::Record::PrimaryKeys().  Finally , "is_sql_function" is set
       when the	Value is a SQL function.  For example, you might have "value
       => 'PASSWORD(string)'", by setting "is_sql_function" to true, that
       string will be inserted into the	query directly rather then as a

   update_table_value table COLUMN NEW_value RECORD_ID IS_SQL
       Update column COLUMN of table table where the record id = RECORD_ID.

       If IS_SQL is set, don't quote the NEW_VALUE.

   simple_query	QUERY_STRING, [	BIND_VALUE, ...	]
       Execute the SQL string specified	in QUERY_STRING

   fetch_result	QUERY, [ BIND_VALUE, ... ]
       Takes a SELECT query as a string, along with an array of	BIND_VALUEs If
       the select succeeds, returns the	first row as an	array.	Otherwise,
       returns a Class::ResturnValue object with the failure loaded up.

       Returns a hash ref for the bind_param call to identify BLOB types used
       by the current database for a particular	column type.

       Returns the database's version.

       If argument "short" is true returns short variant, in other case
       returns whatever	database handle/driver returns.	By default returns
       short version, e.g. 4.1.23 or "8.0-rc4".

       Returns empty string on error or	if database couldn't return version.

       The base	implementation uses a "SELECT VERSION()"

       Returns 1 if the	current	database's searches are	case sensitive by
       default Returns undef otherwise

   _make_clause_case_insensitive column	operator VALUE
       Takes a column, operator	and value. performs the	magic necessary	to
       make your database treat	this clause as case insensitive.

       Returns a column	operator value triple.

   quote_value VALUE
       Calls the database's "quote" in DBD method and returns the result.
       Additionally, turns on perl's utf8 flag if the returned content is

       Tells Jifty::DBI	to begin a new SQL transaction.	This will temporarily
       suspend Autocommit mode.

       Emulates	nested transactions, by	keeping	a transaction stack depth.

       Tells Jifty::DBI	to commit the current SQL transaction.	This will turn
       Autocommit mode back on.

   rollback [FORCE]
       Tells Jifty::DBI	to abort the current SQL transaction.  This will turn
       Autocommit mode back on.

       If this method is passed	a true argument, stack depth is	blown away and
       the outermost transaction is rolled back

       Force the handle	to rollback. Whether or	not we're deep in nested

       Return the current depth	of the faked nested transaction	stack.

       takes an	SQL SELECT statement and massages it to	return ROWS_PER_PAGE
       starting	with FIRST_ROW;

   join	{ Paramhash }
       Takes a paramhash of everything Jifty::DBI::Collection's	"join" method
       takes, plus a parameter called "collection" that	contains a ref to a
       Jifty::DBI::Collection object'.

       This performs the join.

       Takes a "collection" and	"alias"	in a hash and returns true if
       restrictions of the query allow NULLs in	a table	joined with the	alias,
       otherwise returns false value which means that you can use normal join
       instead of left for the aliased table.

       Works only for queries have been	built with "join" in
       Jifty::DBI::Collection and "limit" in Jifty::DBI::Collection methods,
       for other cases return true value to avoid fault	optimizations.

   distinct_query STATEMENTREF
       takes an	incomplete SQL SELECT statement	and massages it	to return a
       DISTINCT	result set.

   distinct_count STATEMENTREF
       takes an	incomplete SQL SELECT statement	and massages it	to return a
       DISTINCT	result set.

       This returns the	canonical true value for this database.	For example,
       in SQLite it is 1 but in	Postgres it is 't'.

       The default is 1.

       This returns the	canonical false	value for this database. For example,
       in SQLite it is 0 but in	Postgres it is 'f'.

       The default is 0.

   Schema manipulation methods

       Rename a	column in a table. Takes 'table', 'column' and new name	in


       Renames a table in the DB. Takes	'table'	and new	name of	it in 'to'.

       Returns a list of the drivers Jifty::DBI	supports.

       Returns a list of the available drivers based on	the presence of
       "DBD::*"	modules.

       Returns a boolean indicating whether the	provided driver	is available.

       When we get rid of the Jifty::DBI::Handle, we need to disconnect	from
       the database

       Setting "JIFTY_DBQUERY_CALLER" environment variable will	make
       Jifty::DBI dump the caller for the SQL queries matching it.  See	also
       "DBI" about setting "DBI_PROFILE".

       Jesse Vincent, <>

       perl(1),	Jifty::DBI

perl v5.32.0			  2014-05-29		 Jifty::DBI::Handle(3)


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