Fix issue #438 JdbcDatabaseMetaData#getSchemas() no longer supported as of 1.3.169

h2/src/docsrc/html/changelog.html

@@ -62,6 +62,7 @@ Change Log
     queries for in-memory databases using partial sort (by Sergi Vladykin).
 </li><li>Experimental off-heap memory storage engine "nioMemFS:" and "nioMemLZF:",
     suggestion from Mark Addleman.
+</li><li>Fix issue #438:JdbcDatabaseMetaData#getSchemas() no longer supported as of 1.3.169
 </li></ul>
 
 <h2>Version 1.3.170 (2012-11-30)</h2>

h2/src/main/org/h2/jdbc/JdbcDatabaseMetaData.java

@@ -2807,12 +2807,44 @@ public class JdbcDatabaseMetaData extends TraceObject implements DatabaseMetaDat
     //*/
 
     /**
-     * [Not supported] Gets the list of schemas.
+     * Gets the list of schemas in the database.
+     * The result set is sorted by TABLE_SCHEM.
+     *
+     * <ul>
+     * <li>1 TABLE_SCHEM (String) schema name
+     * </li><li>2 TABLE_CATALOG (String) catalog name
+     * </li><li>3 IS_DEFAULT (boolean) if this is the default schema
+     * </li></ul>
+     *
+     * @param catalogPattern null (to get all objects) or the catalog name
+     * @param schemaPattern null (to get all objects) or a schema name
+     *            (uppercase for unquoted names)
+     * @return the schema list
+     * @throws SQLException if the connection is closed
      */
     //## Java 1.6 ##
-    public ResultSet getSchemas(String catalog, String schemaPattern)
+    public ResultSet getSchemas(String catalogPattern, String schemaPattern)
             throws SQLException {
-        throw unsupported("getSchemas(., .)");
+        try {
+            debugCodeCall("getSchemas(String,String)");
+            checkClosed();
+            PreparedStatement prep = conn
+                    .prepareAutoCloseStatement("SELECT "
+                            + "SCHEMA_NAME TABLE_SCHEM, "
+                            + "CATALOG_NAME TABLE_CATALOG, "
+                            +" IS_DEFAULT "
+                            + "FROM INFORMATION_SCHEMA.SCHEMATA "
+                            + "WHERE CATALOG_NAME LIKE ? ESCAPE ? "
+                            + "AND SCHEMA_NAME LIKE ? ESCAPE ? "
+                            + "ORDER BY SCHEMA_NAME");
+            prep.setString(1, getCatalogPattern(catalogPattern));
+            prep.setString(2, "\\");
+            prep.setString(3, getSchemaPattern(schemaPattern));
+            prep.setString(4, "\\");
+            return prep.executeQuery();
+        } catch (Exception e) {
+            throw logAndConvert(e);
+        }
     }
     //*/
 

h2/src/test/org/h2/test/jdbc/TestMetaData.java

@@ -75,6 +75,18 @@ public class TestMetaData extends TestBase {
         assertEquals("PUBLIC", rs.getString("TABLE_SCHEM"));
         assertFalse(rs.next());
 
+        rs = meta.getSchemas(null, null);
+        rs.next();
+        assertEquals("INFORMATION_SCHEMA", rs.getString("TABLE_SCHEM"));
+        rs.next();
+        assertEquals("PUBLIC", rs.getString("TABLE_SCHEM"));
+        assertFalse(rs.next());
+        
+        rs = meta.getSchemas(null, "PUBLIC");
+        rs.next();
+        assertEquals("PUBLIC", rs.getString("TABLE_SCHEM"));
+        assertFalse(rs.next());
+        
         rs = meta.getTableTypes();
         rs.next();
         assertEquals("SYSTEM TABLE", rs.getString("TABLE_TYPE"));
@@ -872,6 +884,15 @@ public class TestMetaData extends TestBase {
         assertEquals("PUBLIC", rs.getString(1));
         assertFalse(rs.next());
 
+        rs = meta.getSchemas(null, null);
+        assertResultSetMeta(rs, 3, new String[] { "TABLE_SCHEM", "TABLE_CATALOG", "IS_DEFAULT" }, new int[] {
+                Types.VARCHAR, Types.VARCHAR, Types.BOOLEAN }, null, null);
+        assertTrue(rs.next());
+        assertEquals("INFORMATION_SCHEMA", rs.getString(1));
+        assertTrue(rs.next());
+        assertEquals("PUBLIC", rs.getString(1));
+        assertFalse(rs.next());
+        
         rs = meta.getCatalogs();
         assertResultSetMeta(rs, 1, new String[] { "TABLE_CAT" }, new int[] { Types.VARCHAR }, null, null);
         assertResultSetOrdered(rs, new String[][] { { CATALOG } });
@@ -926,7 +947,7 @@ public class TestMetaData extends TestBase {
         meta.getProcedureColumns(null, null, null, null);
         meta.getProcedures(null, null, null);
         meta.getSchemas();
-        // meta.getSchemas(null, null);
+        meta.getSchemas(null, null);
         meta.getSuperTables(null, null, null);
         // meta.getSuperTypes(null, null, null);
         meta.getTablePrivileges(null, null, null);