R: Collect information about the package annotation DB

hu6800_dbconn {hu6800.db}

R Documentation

Collect information about the package annotation DB

Description

Some convenience functions for getting a connection object to (or collecting information about) the package annotation DB.

Usage

  hu6800_dbconn()
  hu6800_dbfile()
  hu6800_dbschema(file="", show.indices=FALSE)
  hu6800_dbInfo()

Arguments

`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.

Details

hu6800_dbconn returns a connection object to the package annotation DB. IMPORTANT: Don't call dbDisconnect on the connection object returned by hu6800_dbconn or you will break all the AnnDbObj objects defined in this package!

hu6800_dbfile returns the path (character string) to the package annotation DB (this is an SQLite file).

hu6800_dbschema prints the schema definition of the package annotation DB.

hu6800_dbInfo prints other information about the package annotation DB.

Value

hu6800_dbconn: a DBIConnection object representing an open connection to the package annotation DB.

hu6800_dbfile: a character string with the path to the package annotation DB.

hu6800_dbschema: none (invisible NULL).

hu6800_dbInfo: none (invisible NULL).

Examples

  ## Count the number of rows in the "probes" table:
  dbGetQuery(hu6800_dbconn(), "SELECT COUNT(*) FROM probes")

  ## The connection object returned by hu6800_dbconn() was
  ## created with:
  dbConnect(SQLite(), dbname=hu6800_dbfile(), cache_size=64000,
  synchronous=0)

  hu6800_dbschema()

  hu6800_dbInfo()

[Package hu6800.db version 2.6.3 Index]