Mercurial > hg > monetdb-java
diff tests/Test_Rmetadata.java @ 0:a5a898f6886c
Copy of MonetDB java directory changeset e6e32756ad31.
author | Sjoerd Mullender <sjoerd@acm.org> |
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date | Wed, 21 Sep 2016 09:34:48 +0200 (2016-09-21) |
parents | |
children | 04fbf3655452 |
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new file mode 100644 --- /dev/null +++ b/tests/Test_Rmetadata.java @@ -0,0 +1,90 @@ +/* + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * Copyright 1997 - July 2008 CWI, August 2008 - 2016 MonetDB B.V. + */ + +import java.sql.*; + +public class Test_Rmetadata { + public static void main(String[] args) throws Exception { + Class.forName("nl.cwi.monetdb.jdbc.MonetDriver"); + Connection con = DriverManager.getConnection(args[0]); + Statement stmt = con.createStatement(); + ResultSet rs = null; + ResultSetMetaData rsmd = null; + //DatabaseMetaData dbmd = con.getMetaData(); + + con.setAutoCommit(false); + // >> false: auto commit should be off now + System.out.println("0. false\t" + con.getAutoCommit()); + + try { + stmt.executeUpdate("CREATE TABLE table_Test_Rmetadata ( myint int, mydouble double, mybool boolean, myvarchar varchar(15), myclob clob )"); + + // all NULLs + stmt.executeUpdate("INSERT INTO table_Test_Rmetadata VALUES (NULL, NULL, NULL, NULL, NULL)"); + // all filled in + stmt.executeUpdate("INSERT INTO table_Test_Rmetadata VALUES (2 , 3.0, true, 'A string', 'bla bla bla')"); + + rs = stmt.executeQuery("SELECT * FROM table_Test_Rmetadata"); + rsmd = rs.getMetaData(); + + System.out.println("0. 4 columns:\t" + rsmd.getColumnCount()); + for (int col = 1; col <= rsmd.getColumnCount(); col++) { + System.out.println("Colnr " + col + "."); + System.out.println("\tclassname " + rsmd.getColumnClassName(col)); + System.out.println("\tdisplaysize " + rsmd.getColumnDisplaySize(col)); + System.out.println("\tlabel " + rsmd.getColumnLabel(col)); + System.out.println("\tname " + rsmd.getColumnName(col)); + System.out.println("\ttype " + rsmd.getColumnType(col)); + System.out.println("\ttypename " + rsmd.getColumnTypeName(col)); + System.out.println("\tprecision " + rsmd.getPrecision(col)); + System.out.println("\tscale " + rsmd.getScale(col)); + System.out.println("\tcatalogname " + rsmd.getCatalogName(col)); + System.out.println("\tschemaname " + rsmd.getSchemaName(col)); + System.out.println("\ttablename " + rsmd.getTableName(col)); + System.out.println("\tautoincrement " + rsmd.isAutoIncrement(col)); + System.out.println("\tcasesensitive " + rsmd.isCaseSensitive(col)); + System.out.println("\tcurrency " + rsmd.isCurrency(col)); + System.out.println("\tdefwritable " + rsmd.isDefinitelyWritable(col)); + System.out.println("\tnullable " + rsmd.isNullable(col)); + System.out.println("\treadonly " + rsmd.isReadOnly(col)); + System.out.println("\tsearchable " + rsmd.isSearchable(col)); + System.out.println("\tsigned " + rsmd.isSigned(col)); + System.out.println("\twritable " + rsmd.isWritable(col)); + } + + for (int i = 5; rs.next(); i++) { + for (int col = 1; col <= rsmd.getColumnCount(); col++) { + System.out.println("" + i + ".\t" + + isInstance(rs.getObject(col), rsmd.getColumnClassName(col)) + ); + } + } + } catch (SQLException e) { + System.out.println("failed :( "+ e.getMessage()); + System.out.println("ABORTING TEST!!!"); + } + + con.rollback(); + con.close(); + } + + private static String isInstance(Object obj, String type) { + if (obj == null) + return("(null)"); + try { + Class c = Class.forName(type); + if (c.isInstance(obj)) { + return(obj.getClass().getName() + " is an instance of " + type); + } else { + return(obj.getClass().getName() + " is NOT an instance of " + type); + } + } catch (ClassNotFoundException e) { + return("No such class: " + type); + } + } +}