dbReadTable: Convenience functions for importing/exporting DBMS tables

dbReadTable,MySQLConnection,character-methodR Documentation

Convenience functions for importing/exporting DBMS tables


These functions mimic their R/S-Plus counterpart get, assign, exists, remove, and objects, except that they generate code that gets remotely executed in a database engine.


## S4 method for signature 'MySQLConnection,character'
dbReadTable(conn, name, row.names, check.names = TRUE, ...)

## S4 method for signature 'MySQLConnection'
dbListTables(conn, ...)

## S4 method for signature 'MySQLConnection,character'
dbExistsTable(conn, name, ...)

## S4 method for signature 'MySQLConnection,character'
dbRemoveTable(conn, name, ...)

## S4 method for signature 'MySQLConnection,character'
dbListFields(conn, name, ...)



a MySQLConnection object, produced by dbConnect


a character string specifying a table name.


A string or an index specifying the column in the DBMS table to use as row.names in the output data.frame. Defaults to using the row_names column if present. Set to NULL to never use row names.


If TRUE, the default, column names will be converted to valid R identifiers.


Unused, needed for compatiblity with generic.


A data.frame in the case of dbReadTable; otherwise a logical indicating whether the operation was successful.


Note that the data.frame returned by dbReadTable only has primitive data, e.g., it does not coerce character data to factors.


if (mysqlHasDefault()) {
con <- dbConnect(RMySQL::MySQL(), dbname = "test")

# By default, row names are written in a column to row_names, and
# automatically read back into the row.names()
dbWriteTable(con, "mtcars", mtcars[1:5, ], overwrite = TRUE)
dbReadTable(con, "mtcars")
dbReadTable(con, "mtcars", row.names = NULL)

RMySQL documentation built on May 29, 2024, 5:43 a.m.

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