EVOLUTION-MANAGER
Edit File: dbExistsTable.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Does a table exist?</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for dbExistsTable {DBI}"><tr><td>dbExistsTable {DBI}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Does a table exist?</h2> <h3>Description</h3> <p>Returns if a table given by name exists in the database. </p> <h3>Usage</h3> <pre> dbExistsTable(conn, name, ...) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>conn</code></td> <td> <p>A <a href="DBIConnection-class.html">DBIConnection</a> object, as returned by <code><a href="dbConnect.html">dbConnect()</a></code>.</p> </td></tr> <tr valign="top"><td><code>name</code></td> <td> <p>A character string specifying a DBMS table name.</p> </td></tr> <tr valign="top"><td><code>...</code></td> <td> <p>Other parameters passed on to methods.</p> </td></tr> </table> <h3>Value</h3> <p><code>dbExistsTable()</code> returns a logical scalar, <code>TRUE</code> if the table or view specified by the <code>name</code> argument exists, <code>FALSE</code> otherwise. This includes temporary tables if supported by the database. </p> <p>An error is raised when calling this method for a closed or invalid connection. An error is also raised if <code>name</code> cannot be processed with <code><a href="dbQuoteIdentifier.html">dbQuoteIdentifier()</a></code> or if this results in a non-scalar. </p> <h3>Specification</h3> <p>The <code>name</code> argument is processed as follows, to support databases that allow non-syntactic names for their objects: </p> <ul> <li><p> If an unquoted table name as string: <code>dbExistsTable()</code> will do the quoting, perhaps by calling <code>dbQuoteIdentifier(conn, x = name)</code> </p> </li> <li><p> If the result of a call to <code><a href="dbQuoteIdentifier.html">dbQuoteIdentifier()</a></code>: no more quoting is done </p> </li></ul> <p>For all tables listed by <code><a href="dbListTables.html">dbListTables()</a></code>, <code>dbExistsTable()</code> returns <code>TRUE</code>. </p> <h3>See Also</h3> <p>Other DBIConnection generics: <code><a href="DBIConnection-class.html">DBIConnection-class</a></code>, <code><a href="dbAppendTable.html">dbAppendTable</a>()</code>, <code><a href="dbCreateTable.html">dbCreateTable</a>()</code>, <code><a href="dbDataType.html">dbDataType</a>()</code>, <code><a href="dbDisconnect.html">dbDisconnect</a>()</code>, <code><a href="dbExecute.html">dbExecute</a>()</code>, <code><a href="dbGetException.html">dbGetException</a>()</code>, <code><a href="dbGetInfo.html">dbGetInfo</a>()</code>, <code><a href="dbGetQuery.html">dbGetQuery</a>()</code>, <code><a href="dbIsReadOnly.html">dbIsReadOnly</a>()</code>, <code><a href="dbIsValid.html">dbIsValid</a>()</code>, <code><a href="dbListFields.html">dbListFields</a>()</code>, <code><a href="dbListObjects.html">dbListObjects</a>()</code>, <code><a href="dbListResults.html">dbListResults</a>()</code>, <code><a href="dbListTables.html">dbListTables</a>()</code>, <code><a href="dbReadTable.html">dbReadTable</a>()</code>, <code><a href="dbRemoveTable.html">dbRemoveTable</a>()</code>, <code><a href="dbSendQuery.html">dbSendQuery</a>()</code>, <code><a href="dbSendStatement.html">dbSendStatement</a>()</code>, <code><a href="dbWriteTable.html">dbWriteTable</a>()</code> </p> <h3>Examples</h3> <pre> con <- dbConnect(RSQLite::SQLite(), ":memory:") dbExistsTable(con, "iris") dbWriteTable(con, "iris", iris) dbExistsTable(con, "iris") dbDisconnect(con) </pre> <hr /><div style="text-align: center;">[Package <em>DBI</em> version 1.1.0 <a href="00Index.html">Index</a>]</div> </body></html>