mgu74av2_dbconn {mgu74av2.db} | R Documentation |
Some convenience functions for getting a connection object to (or collecting information about) the package annotation DB.
mgu74av2_dbconn() mgu74av2_dbfile() mgu74av2_dbschema(file="", show.indices=FALSE) mgu74av2_dbInfo()
file |
A connection, or a character string naming the file to print to (see
the file argument of the cat function for
the details).
|
show.indices |
The CREATE INDEX statements are not shown by default.
Use show.indices=TRUE to get them.
|
mgu74av2_dbconn
returns a connection object to the package
annotation DB.
IMPORTANT: Don't call dbDisconnect
on the connection
object returned by mgu74av2_dbconn
or you will
break all the AnnDbObj
objects defined in this package!
mgu74av2_dbfile
returns the path (character string) to the
package annotation DB (this is an SQLite file).
mgu74av2_dbschema
prints the schema definition of the
package annotation DB.
mgu74av2_dbInfo
prints other information about the package
annotation DB.
mgu74av2_dbconn
: a DBIConnection object representing an open
connection to the package annotation DB.
mgu74av2_dbfile
: a character string with the path to the
package annotation DB.
mgu74av2_dbschema
: none (invisible NULL
).
mgu74av2_dbInfo
: none (invisible NULL
).
dbGetQuery
,
dbConnect
,
dbconn
,
dbfile
,
dbschema
,
dbInfo
## Count the number of rows in the "probes" table: dbGetQuery(mgu74av2_dbconn(), "SELECT COUNT(*) FROM probes") ## The connection object returned by mgu74av2_dbconn() was created with: dbConnect(SQLite(), dbname=mgu74av2_dbfile(), cache_size=64000, synchronous=0) mgu74av2_dbschema() mgu74av2_dbInfo()