Merge pull request #1776 from katzyn/lower

Improve DATABASE_TO_LOWER handling

h2/src/docsrc/html/features.html

@@ -338,7 +338,7 @@ This is achieved using different database URLs. Settings in the URLs are not cas
     <td><a href="#compatibility">Compatibility mode</a></td>
     <td class="notranslate">
         jdbc:h2:&lt;url&gt;;MODE=&lt;databaseType&gt;<br />
-        jdbc:h2:~/test;MODE=MYSQL
+        jdbc:h2:~/test;MODE=MYSQL;DATABASE_TO_LOWER=TRUE
     </td>
 </tr>
 <tr>
@@ -894,8 +894,9 @@ or the SQL statement <code>SET MODE MSSQLServer</code>.
 
 <h3>MySQL Compatibility Mode</h3>
 <p>
-To use the MySQL mode, use the database URL <code>jdbc:h2:~/test;MODE=MySQL</code>
-or the SQL statement <code>SET MODE MySQL</code>. Use this mode for compatibility with MariaDB too.
+To use the MySQL mode, use the database URL <code>jdbc:h2:~/test;MODE=MySQL;DATABASE_TO_LOWER=TRUE</code>.
+Use this mode for compatibility with MariaDB too.
+When case-insensitive identifiers are needed append <code>;CASE_INSENSITIVE_IDENTIFIERS=TRUE</code> to URL.
 </p>
 <ul><li>When inserting data, if a column is defined to be <code>NOT NULL</code>
     and <code>NULL</code> is inserted,
@@ -904,7 +905,6 @@ or the SQL statement <code>SET MODE MySQL</code>. Use this mode for compatibilit
 </li><li>Creating indexes in the <code>CREATE TABLE</code> statement is allowed using
     <code>INDEX(..)</code> or <code>KEY(..)</code>.
     Example: <code>create table test(id int primary key, name varchar(255), key idx_name(name));</code>
-</li><li>Meta data calls return identifiers in lower case.
 </li><li>When converting a floating point number to an integer, the fractional
     digits are not truncated, but the value is rounded.
 </li><li>Concatenating <code>NULL</code> with another value
@@ -944,8 +944,7 @@ or the SQL statement <code>SET MODE Oracle</code>.
 
 <h3>PostgreSQL Compatibility Mode</h3>
 <p>
-To use the PostgreSQL mode, use the database URL <code>jdbc:h2:~/test;MODE=PostgreSQL</code>
-or the SQL statement <code>SET MODE PostgreSQL</code>.
+To use the PostgreSQL mode, use the database URL <code>jdbc:h2:~/test;MODE=PostgreSQL;DATABASE_TO_LOWER=TRUE</code>.
 </p>
 <ul><li>For aliased columns, <code>ResultSetMetaData.getColumnName()</code>
     returns the alias name and <code>getTableName()</code> returns

h2/src/main/org/h2/engine/Database.java

@@ -1275,7 +1275,7 @@ public class Database implements DataHandler {
      * @return the role or null
      */
     public Role findRole(String roleName) {
-        return roles.get(roleName);
+        return roles.get(StringUtils.toUpperEnglish(roleName));
     }
 
     /**
@@ -1309,7 +1309,7 @@ public class Database implements DataHandler {
      * @return the user or null
      */
     public User findUser(String name) {
-        return users.get(name);
+        return users.get(StringUtils.toUpperEnglish(name));
     }
 
     /**

h2/src/main/org/h2/engine/DbSettings.java

@@ -357,6 +357,9 @@ public class DbSettings extends SettingsBase {
         }
         databaseToLower = lower;
         databaseToUpper = upper;
+        HashMap<String, String> settings = getSettings();
+        settings.put("DATABASE_TO_LOWER", Boolean.toString(lower));
+        settings.put("DATABASE_TO_UPPER", Boolean.toString(upper));
     }
 
     /**

h2/src/main/org/h2/engine/RightOwner.java

@@ -11,6 +11,7 @@ import java.util.List;
 import java.util.Map.Entry;
 
 import org.h2.table.Table;
+import org.h2.util.StringUtils;
 
 /**
  * A right owner (sometimes called principal).
@@ -27,9 +28,13 @@ public abstract class RightOwner extends DbObjectBase {
      */
     private HashMap<DbObject, Right> grantedRights;
 
-    protected RightOwner(Database database, int id, String name,
-            int traceModuleId) {
-        super(database, id, name, traceModuleId);
+    protected RightOwner(Database database, int id, String name, int traceModuleId) {
+        super(database, id, StringUtils.toUpperEnglish(name), traceModuleId);
+    }
+
+    @Override
+    public void rename(String newName) {
+        super.rename(StringUtils.toUpperEnglish(newName));
     }
 
     /**

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

@@ -66,8 +66,53 @@ import org.h2.value.ValueString;
  * used in one thread at any time.
  * </p>
  */
-public class JdbcConnection extends TraceObject
-        implements Connection, JdbcConnectionBackwardsCompat {
+public class JdbcConnection extends TraceObject implements Connection, JdbcConnectionBackwardsCompat {
+
+    /**
+     * Database settings.
+     */
+    static final class Settings {
+
+        /**
+         * The database mode.
+         */
+        final Mode mode;
+
+        /**
+         * Whether unquoted identifiers are converted to upper case.
+         */
+        final boolean databaseToUpper;
+
+        /**
+         * Whether unquoted identifiers are converted to lower case.
+         */
+        final boolean databaseToLower;
+
+        /**
+         * Whether all identifiers are case insensitive.
+         */
+        final boolean caseInsensitiveIdentifiers;
+
+        /**
+         * Creates new instance of database settings.
+         *
+         * @param mode
+         *            the database mode
+         * @param databaseToUpper
+         *            whether unquoted identifiers are converted to upper case
+         * @param databaseToLower
+         *            whether unquoted identifiers are converted to lower case
+         * @param caseInsensitiveIdentifiers
+         *            whether all identifiers are case insensitive
+         */
+        Settings(Mode mode, boolean databaseToUpper, boolean databaseToLower, boolean caseInsensitiveIdentifiers) {
+            this.mode = mode;
+            this.databaseToUpper = databaseToUpper;
+            this.databaseToLower = databaseToLower;
+            this.caseInsensitiveIdentifiers = caseInsensitiveIdentifiers;
+        }
+
+    }
 
     private static final String NUM_SERVERS = "numServers";
     private static final String PREFIX_SERVER = "server";
@@ -93,7 +138,7 @@ public class JdbcConnection extends TraceObject
     private int queryTimeoutCache = -1;
 
     private Map<String, String> clientInfo;
-    private volatile Mode mode;
+    private volatile Settings settings;
     private final boolean scopeGeneratedKeys;
 
     /**
@@ -2088,31 +2133,58 @@ public class JdbcConnection extends TraceObject
     }
 
     Mode getMode() throws SQLException {
-        Mode mode = this.mode;
-        if (mode == null) {
-            String name;
+        return getSettings().mode;
+    }
+
+    Settings getSettings() throws SQLException {
+        Settings settings = this.settings;
+        if (settings == null) {
+            String modeName = ModeEnum.REGULAR.name();
+            boolean databaseToUpper = true, databaseToLower = false, caseInsensitiveIdentifiers = false;
             try (PreparedStatement prep = prepareStatement(
-                    "SELECT VALUE FROM INFORMATION_SCHEMA.SETTINGS WHERE NAME=?")) {
+                    "SELECT NAME, VALUE FROM INFORMATION_SCHEMA.SETTINGS WHERE NAME IN (?, ?, ?, ?)")) {
                 prep.setString(1, "MODE");
+                prep.setString(2, "DATABASE_TO_UPPER");
+                prep.setString(3, "DATABASE_TO_LOWER");
+                prep.setString(4, "CASE_INSENSITIVE_IDENTIFIERS");
                 ResultSet rs = prep.executeQuery();
-                rs.next();
-                name = rs.getString(1);
+                while (rs.next()) {
+                    String value = rs.getString(2);
+                    switch (rs.getString(1)) {
+                    case "MODE":
+                        modeName = value;
+                        break;
+                    case "DATABASE_TO_UPPER":
+                        databaseToUpper = Boolean.valueOf(value);
+                        break;
+                    case "DATABASE_TO_LOWER":
+                        databaseToLower = Boolean.valueOf(value);
+                        break;
+                    case "CASE_INSENSITIVE_IDENTIFIERS":
+                        caseInsensitiveIdentifiers = Boolean.valueOf(value);
+                    }
+                }
             }
-            mode = Mode.getInstance(name);
+            Mode mode = Mode.getInstance(modeName);
             if (mode == null) {
                 mode = Mode.getRegular();
             }
-            this.mode = mode;
+            if (session instanceof SessionRemote
+                    && ((SessionRemote) session).getClientVersion() < Constants.TCP_PROTOCOL_VERSION_18) {
+                caseInsensitiveIdentifiers = !databaseToUpper;
+            }
+            settings = new Settings(mode, databaseToUpper, databaseToLower, caseInsensitiveIdentifiers);
+            this.settings = settings;
         }
-        return mode;
+        return settings;
     }
 
     /**
      * INTERNAL
      */
     public boolean isRegularMode() throws SQLException {
-        // Clear cached mode if any (required by tests)
-        mode = null;
+        // Clear cached settings if any (required by tests)
+        settings = null;
         return getMode().getEnum() == ModeEnum.REGULAR;
     }
 }

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

@@ -16,7 +16,6 @@ import java.util.Map.Entry;
 import java.util.Properties;
 
 import org.h2.engine.Constants;
-import org.h2.engine.Mode.ModeEnum;
 import org.h2.engine.SessionInterface;
 import org.h2.engine.SessionRemote;
 import org.h2.engine.SysProperties;
@@ -1539,7 +1538,7 @@ public class JdbcDatabaseMetaData extends TraceObject implements
 
     /**
      * Gets the comma-separated list of all SQL keywords that are not supported as
-     * table/column/index name, in addition to the SQL-2003 keywords. The list
+     * table/column/index name, in addition to the SQL:2003 keywords. The list
      * returned is:
      * <pre>
      * IF,ILIKE,INTERSECTS,
@@ -1551,7 +1550,7 @@ public class JdbcDatabaseMetaData extends TraceObject implements
      * SYSDATE,SYSTIME,SYSTIMESTAMP,
      * TODAY,TOP
      * </pre>
-     * The complete list of keywords (including SQL-2003 keywords) is:
+     * The complete list of keywords (including SQL:2003 keywords) is:
      * <pre>
      * ALL, AND, ARRAY, AS,
      * BETWEEN,
@@ -2594,98 +2593,100 @@ public class JdbcDatabaseMetaData extends TraceObject implements
 
     /**
      * Checks if for CREATE TABLE Test(ID INT), getTables returns Test as the
-     * table name.
+     * table name and identifiers are case sensitive.
      *
-     * @return false
+     * @return true is so, false otherwise
      */
     @Override
-    public boolean supportsMixedCaseIdentifiers() {
+    public boolean supportsMixedCaseIdentifiers() throws SQLException{
         debugCodeCall("supportsMixedCaseIdentifiers");
-        return false;
-    }
-
-    /**
-     * Checks if a table created with CREATE TABLE "Test"(ID INT) is a different
-     * table than a table created with CREATE TABLE TEST(ID INT).
-     *
-     * @return true usually, and false in MySQL mode
-     */
-    @Override
-    public boolean supportsMixedCaseQuotedIdentifiers() throws SQLException {
-        debugCodeCall("supportsMixedCaseQuotedIdentifiers");
-        return conn.getMode().getEnum() != ModeEnum.MySQL;
+        JdbcConnection.Settings settings = conn.getSettings();
+        return !settings.databaseToUpper && !settings.databaseToLower && !settings.caseInsensitiveIdentifiers;
     }
 
     /**
      * Checks if for CREATE TABLE Test(ID INT), getTables returns TEST as the
      * table name.
      *
-     * @return true usually, and false in MySQL mode
+     * @return true is so, false otherwise
      */
     @Override
     public boolean storesUpperCaseIdentifiers() throws SQLException {
         debugCodeCall("storesUpperCaseIdentifiers");
-        return conn.getMode().getEnum() != ModeEnum.MySQL;
+        return conn.getSettings().databaseToUpper;
     }
 
     /**
      * Checks if for CREATE TABLE Test(ID INT), getTables returns test as the
      * table name.
      *
-     * @return false usually, and true in MySQL mode
+     * @return true is so, false otherwise
      */
     @Override
     public boolean storesLowerCaseIdentifiers() throws SQLException {
         debugCodeCall("storesLowerCaseIdentifiers");
-        return conn.getMode().getEnum() == ModeEnum.MySQL;
+        return conn.getSettings().databaseToLower;
     }
 
     /**
      * Checks if for CREATE TABLE Test(ID INT), getTables returns Test as the
-     * table name.
+     * table name and identifiers are not case sensitive.
      *
-     * @return false
+     * @return true is so, false otherwise
      */
     @Override
-    public boolean storesMixedCaseIdentifiers() {
+    public boolean storesMixedCaseIdentifiers() throws SQLException {
         debugCodeCall("storesMixedCaseIdentifiers");
-        return false;
+        JdbcConnection.Settings settings = conn.getSettings();
+        return !settings.databaseToUpper && !settings.databaseToLower && settings.caseInsensitiveIdentifiers;
+    }
+
+    /**
+     * Checks if a table created with CREATE TABLE "Test"(ID INT) is a different
+     * table than a table created with CREATE TABLE "TEST"(ID INT).
+     *
+     * @return true is so, false otherwise
+     */
+    @Override
+    public boolean supportsMixedCaseQuotedIdentifiers() throws SQLException {
+        debugCodeCall("supportsMixedCaseQuotedIdentifiers");
+        return !conn.getSettings().caseInsensitiveIdentifiers;
     }
 
     /**
      * Checks if for CREATE TABLE "Test"(ID INT), getTables returns TEST as the
      * table name.
      *
-     * @return false usually, and true in MySQL mode
+     * @return false
      */
     @Override
     public boolean storesUpperCaseQuotedIdentifiers() throws SQLException {
         debugCodeCall("storesUpperCaseQuotedIdentifiers");
-        return conn.getMode().getEnum() == ModeEnum.MySQL;
+        return false;
     }
 
     /**
      * Checks if for CREATE TABLE "Test"(ID INT), getTables returns test as the
      * table name.
      *
-     * @return false usually, and true in MySQL mode
+     * @return false
      */
     @Override
     public boolean storesLowerCaseQuotedIdentifiers() throws SQLException {
         debugCodeCall("storesLowerCaseQuotedIdentifiers");
-        return conn.getMode().getEnum() == ModeEnum.MySQL;
+        return false;
     }
 
     /**
      * Checks if for CREATE TABLE "Test"(ID INT), getTables returns Test as the
-     * table name.
+     * table name and identifiers are case insensitive.
      *
-     * @return true usually, and false in MySQL mode
+     * @return true is so, false otherwise
      */
     @Override
     public boolean storesMixedCaseQuotedIdentifiers() throws SQLException {
         debugCodeCall("storesMixedCaseQuotedIdentifiers");
-        return conn.getMode().getEnum() != ModeEnum.MySQL;
+        return conn.getSettings().caseInsensitiveIdentifiers;
     }
 
     /**

h2/src/test/org/h2/test/db/TestCompatibility.java

@@ -315,13 +315,15 @@ public class TestCompatibility extends TestDb {
     }
 
     private void testMySQL() throws SQLException {
+        // need to reconnect to change DATABASE_TO_LOWER
+        conn.close();
+        conn = getConnection("compatibility;MODE=MYSQL;DATABASE_TO_LOWER=TRUE");
         Statement stat = conn.createStatement();
-        stat.execute("set mode mysql");
         stat.execute("create schema test_schema");
         stat.execute("use test_schema");
-        assertResult("TEST_SCHEMA", stat, "select schema()");
+        assertResult("test_schema", stat, "select schema()");
         stat.execute("use public");
-        assertResult("PUBLIC", stat, "select schema()");
+        assertResult("public", stat, "select schema()");
 
         stat.execute("SELECT 1");
         stat.execute("DROP TABLE IF EXISTS TEST");
@@ -372,17 +374,17 @@ public class TestCompatibility extends TestDb {
         }
         // need to reconnect, because meta data tables may be initialized
         conn.close();
-        conn = getConnection("compatibility;MODE=MYSQL");
+        conn = getConnection("compatibility;MODE=MYSQL;DATABASE_TO_LOWER=TRUE");
         stat = conn.createStatement();
         testLog(Math.log(10), stat);
 
         DatabaseMetaData meta = conn.getMetaData();
         assertTrue(meta.storesLowerCaseIdentifiers());
-        assertTrue(meta.storesLowerCaseQuotedIdentifiers());
+        assertFalse(meta.storesLowerCaseQuotedIdentifiers());
         assertFalse(meta.storesMixedCaseIdentifiers());
         assertFalse(meta.storesMixedCaseQuotedIdentifiers());
         assertFalse(meta.storesUpperCaseIdentifiers());
-        assertTrue(meta.storesUpperCaseQuotedIdentifiers());
+        assertFalse(meta.storesUpperCaseQuotedIdentifiers());
 
         stat = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
                 ResultSet.CONCUR_UPDATABLE);
@@ -422,7 +424,7 @@ public class TestCompatibility extends TestDb {
 
         // Check if mysql comments are supported, ensure clean connection
         conn.close();
-        conn = getConnection("compatibility;MODE=MYSQL");
+        conn = getConnection("compatibility;MODE=MYSQL;DATABASE_TO_LOWER=TRUE");
         stat = conn.createStatement();
         stat.execute("DROP TABLE IF EXISTS TEST_NO_COMMENT");
         stat.execute("CREATE table TEST_NO_COMMENT " +
@@ -450,6 +452,8 @@ public class TestCompatibility extends TestDb {
         stat.execute("CREATE INDEX IDX_ATTACHMENT_ID ON TEST_COMMENT_ENGINE (ATTACHMENT_ID)");
         stat.execute("DROP INDEX IDX_ATTACHMENT_ID ON TEST_COMMENT_ENGINE");
 
+        stat.execute("DROP ALL OBJECTS");
+
         conn.close();
         conn = getConnection("compatibility");
     }

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

@@ -527,7 +527,7 @@ public class TestMetaData extends TestDb {
         assertFalse(meta.storesLowerCaseIdentifiers());
         assertFalse(meta.storesLowerCaseQuotedIdentifiers());
         assertFalse(meta.storesMixedCaseIdentifiers());
-        assertTrue(meta.storesMixedCaseQuotedIdentifiers());
+        assertFalse(meta.storesMixedCaseQuotedIdentifiers());
         assertTrue(meta.storesUpperCaseIdentifiers());
         assertFalse(meta.storesUpperCaseQuotedIdentifiers());
         assertTrue(meta.supportsAlterTableWithAddColumn());

h2/src/test/org/h2/test/unit/TestBnf.java

@@ -39,7 +39,7 @@ public class TestBnf extends TestDb {
             testModes(conn);
             testProcedures(conn, false);
         }
-        try (Connection conn = getConnection("bnf;mode=mysql")) {
+        try (Connection conn = getConnection("bnf;mode=mysql;database_to_lower=true")) {
             testProcedures(conn, true);
         }
     }