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Added some handy methods for introspecting on databases.

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git-svn-id: https://samskivert.googlecode.com/svn/trunk@1432 6335cc39-0255-0410-8fd6-9bcaacd3b74c
This commit is contained in:
mdb
2004-05-17 15:58:45 +00:00
parent 92e145286e
commit 4faf6ab519
1 changed files with 41 additions and 1 deletions
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projects/samskivert/src/java/com/samskivert/jdbc/JDBCUtil.java
+41 -1
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@@ -1,5 +1,5 @@
//
// $Id: JDBCUtil.java,v 1.7 2004/04/30 02:38:10 mdb Exp $
// $Id: JDBCUtil.java,v 1.8 2004/05/17 15:58:45 mdb Exp $
//
// samskivert library - useful routines for java programs
// Copyright (C) 2001 Michael Bayne
@@ -164,4 +164,44 @@ public class JDBCUtil
return text;
}
}
/**
* Returns true if the table with the specified name exists, false if
* it does not. <em>Note:</em> the table name is case sensitive.
*/
public static boolean tableExists (Connection conn, String name)
throws SQLException
{
boolean matched = false;
ResultSet rs = conn.getMetaData().getTables("", "", name, null);
while (rs.next()) {
String tname = rs.getString("TABLE_NAME");
if (name.equals(tname)) {
matched = true;
}
}
return matched;
}
/**
* Returns true if the table with the specified name exists and
* contains a column with the specified name, false if either
* condition does not hold true. <em>Note:</em> the names are case
* sensitive.
*/
public static boolean tableContainsColumn (
Connection conn, String table, String column)
throws SQLException
{
boolean matched = false;
ResultSet rs = conn.getMetaData().getColumns("", "", table, column);
while (rs.next()) {
String tname = rs.getString("TABLE_NAME");
String cname = rs.getString("COLUMN_NAME");
if (tname.equals(table) && cname.equals(column)) {
matched = true;
}
}
return matched;
}
}