sql desensitize support.

src/main/java/com/alibaba/druid/sql/SQLUtils.java

@@ -15,11 +15,9 @@
  */
 package com.alibaba.druid.sql;
 
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
-import com.alibaba.druid.DruidRuntimeException;
 import com.alibaba.druid.sql.ast.SQLExpr;
 import com.alibaba.druid.sql.ast.SQLObject;
 import com.alibaba.druid.sql.ast.SQLReplaceable;
@@ -277,8 +275,9 @@ public class SQLUtils {
             option = DEFAULT_FORMAT_OPTION;
         }
         visitor.setUppCase(option.isUppCase());
-        visitor.setPrettyFormat(option.isPrettyFormat());
-        visitor.setParameterized(option.isParameterized());
+        visitor.setPrettyFormat(option.prettyFormat);
+        visitor.setParameterized(option.parameterized);
+        visitor.setDesensitize(option.desensitize);
 
         if (tableMapping != null) {
             visitor.setTableMapping(tableMapping);
@@ -630,6 +629,7 @@ public class SQLUtils {
         private boolean ucase = true;
         private boolean prettyFormat = true;
         private boolean parameterized = false;
+        private boolean desensitize = false;
 
         public FormatOption() {
 
@@ -649,6 +649,14 @@ public class SQLUtils {
             this.parameterized = parameterized;
         }
 
+        public boolean isDesensitize() {
+            return desensitize;
+        }
+
+        public void setDesensitize(boolean desensitize) {
+            this.desensitize = desensitize;
+        }
+
         public boolean isUppCase() {
             return ucase;
         }
@@ -865,5 +873,15 @@ public class SQLUtils {
 
         return false;
     }
+
+    public static String desensitizeTable(String tableName) {
+        if (tableName == null) {
+            return null;
+        }
+
+        tableName = normalize(tableName);
+        long hash = Utils.fnv_64_lower(tableName);
+        return Utils.hex_t(hash);
+    }
 }
 

src/main/java/com/alibaba/druid/sql/ast/statement/SQLCreateViewStatement.java

@@ -30,7 +30,7 @@ public class SQLCreateViewStatement extends SQLStatementImpl implements SQLDDLSt
 
     private boolean     orReplace   = false;
     private boolean     force       = false;
-    protected SQLName   name;
+    // protected SQLName   name;
     protected SQLSelect subQuery;
     protected boolean   ifNotExists = false;
 
@@ -38,6 +38,8 @@ public class SQLCreateViewStatement extends SQLStatementImpl implements SQLDDLSt
     protected SQLName   definer;
     protected String    sqlSecurity;
 
+    protected SQLExprTableSource tableSource;
+
     protected final List<Column> columns = new ArrayList<Column>();
 
     private Level with;
@@ -61,11 +63,26 @@ public class SQLCreateViewStatement extends SQLStatementImpl implements SQLDDLSt
     }
 
     public SQLName getName() {
-        return name;
+        if (tableSource == null) {
+            return null;
+        }
+
+        return (SQLName) tableSource.getExpr();
     }
 
     public void setName(SQLName name) {
-        this.name = name;
+        this.setTableSource(new SQLExprTableSource(name));
+    }
+
+    public SQLExprTableSource getTableSource() {
+        return tableSource;
+    }
+
+    public void setTableSource(SQLExprTableSource tableSource) {
+        if (tableSource != null) {
+            tableSource.setParent(this);
+        }
+        this.tableSource = tableSource;
     }
 
     public Level getWith() {
@@ -151,7 +168,7 @@ public class SQLCreateViewStatement extends SQLStatementImpl implements SQLDDLSt
 
     public void output(StringBuffer buf) {
         buf.append("CREATE VIEW ");
-        this.name.output(buf);
+        this.getName().output(buf);
 
         if (this.columns.size() > 0) {
             buf.append(" (");
@@ -176,7 +193,7 @@ public class SQLCreateViewStatement extends SQLStatementImpl implements SQLDDLSt
     @Override
     protected void accept0(SQLASTVisitor visitor) {
         if (visitor.visit(this)) {
-            acceptChild(visitor, this.name);
+            acceptChild(visitor, this.tableSource);
             acceptChild(visitor, this.columns);
             acceptChild(visitor, this.comment);
             acceptChild(visitor, this.subQuery);

src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java

@@ -24,6 +24,7 @@ import java.sql.NClob;
 import java.text.SimpleDateFormat;
 import java.util.*;
 
+import com.alibaba.druid.sql.SQLUtils;
 import com.alibaba.druid.sql.ast.*;
 import com.alibaba.druid.sql.ast.expr.*;
 import com.alibaba.druid.sql.ast.statement.*;
@@ -69,6 +70,8 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter implements Paramet
 
     protected transient int lines = 0;
 
+    protected boolean desensitize = false;
+
     public SQLASTOutputVisitor(Appendable appender){
         this.appender = appender;
     }
@@ -118,6 +121,14 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter implements Paramet
         return parameters;
     }
 
+    public boolean isDesensitize() {
+        return desensitize;
+    }
+
+    public void setDesensitize(boolean desensitize) {
+        this.desensitize = desensitize;
+    }
+
     public Set<String> getTables() {
         return this.tables;
     }
@@ -1423,6 +1434,26 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter implements Paramet
             addTable(expr.toString());
         }
 
+        if (desensitize) {
+            SQLExpr owner = null;
+            String ident = null;
+            if (expr instanceof SQLIdentifierExpr) {
+                ident = ((SQLIdentifierExpr) expr).getName();
+            } else if (expr instanceof SQLPropertyExpr) {
+                SQLPropertyExpr propertyExpr = (SQLPropertyExpr) expr;
+                propertyExpr.getOwner().accept(this);
+                print('.');
+
+                ident = propertyExpr.getName();
+            }
+
+            if (ident != null) {
+                String desensitizeTable = SQLUtils.desensitizeTable(ident);
+                print0(desensitizeTable);
+                return;
+            }
+        }
+
         if (tableMapping != null && expr instanceof SQLName) {
             String tableName = expr.toString();
 
@@ -2446,7 +2477,7 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter implements Paramet
             print0(ucase ? "IF NOT EXISTS " : "if not exists ");
         }
 
-        x.getName().accept(this);
+        x.getTableSource().accept(this);
 
         if (x.getColumns().size() > 0) {
             println();

src/main/java/com/alibaba/druid/sql/visitor/SchemaStatVisitor.java

@@ -426,7 +426,11 @@ public class SchemaStatVisitor extends SQLASTVisitorAdapter {
             return true;
         }
 
-        switch (x.getOperator()) {
+        final SQLBinaryOperator op = x.getOperator();
+        final SQLExpr left = x.getLeft();
+        final SQLExpr right = x.getRight();
+
+        switch (op) {
             case Equality:
             case NotEqual:
             case GreaterThan:
@@ -439,15 +443,32 @@ public class SchemaStatVisitor extends SQLASTVisitorAdapter {
             case NotLike:
             case Is:
             case IsNot:
-                handleCondition(x.getLeft(), x.getOperator().name, x.getRight());
-                handleCondition(x.getRight(), x.getOperator().name, x.getLeft());
+                handleCondition(left, x.getOperator().name, right);
+                handleCondition(right, x.getOperator().name, left);
 
-                handleRelationship(x.getLeft(), x.getOperator().name, x.getRight());
+                handleRelationship(left, x.getOperator().name, right);
                 break;
+            case BooleanOr:{
+                List<SQLExpr> list = SQLBinaryOpExpr.split(x, op);
+
+                for (SQLExpr item : list) {
+                    if (item instanceof SQLBinaryOpExpr) {
+                        visit((SQLBinaryOpExpr) item);
+                    } else {
+                        item.accept(this);
+                    }
+                }
+
+                return false;
+            }
             default:
                 break;
         }
-        return true;
+
+        left.accept(this);
+        right.accept(this);
+
+        return false;
     }
 
     protected void handleRelationship(SQLExpr left, String operator, SQLExpr right) {

src/main/java/com/alibaba/druid/util/Utils.java

@@ -334,4 +334,117 @@ public class Utils {
     public static boolean equals(Object a, Object b) {
         return (a == b) || (a != null && a.equals(b));
     }
+
+    public static String hex(int hash) {
+        byte[] bytes = new byte[4];
+
+        bytes[3] = (byte) (hash       );
+        bytes[2] = (byte) (hash >>>  8);
+        bytes[1] = (byte) (hash >>> 16);
+        bytes[0] = (byte) (hash >>> 24);
+
+
+        char[] chars = new char[8];
+        for (int i = 0; i < 4; ++i) {
+            byte b = bytes[i];
+
+            int a = b & 0xFF;
+            int b0 = a >> 4;
+            int b1 = a & 0xf;
+
+            chars[i * 2] = (char) (b0 + (b0 < 10 ? 48 : 55));
+            chars[i * 2 + 1] = (char) (b1 + (b1 < 10 ? 48 : 55));
+        }
+
+        return new String(chars);
+    }
+
+    public static String hex(long hash) {
+        byte[] bytes = new byte[8];
+
+        bytes[7] = (byte) (hash       );
+        bytes[6] = (byte) (hash >>>  8);
+        bytes[5] = (byte) (hash >>> 16);
+        bytes[4] = (byte) (hash >>> 24);
+        bytes[3] = (byte) (hash >>> 32);
+        bytes[2] = (byte) (hash >>> 40);
+        bytes[1] = (byte) (hash >>> 48);
+        bytes[0] = (byte) (hash >>> 56);
+
+        char[] chars = new char[16];
+        for (int i = 0; i < 8; ++i) {
+            byte b = bytes[i];
+
+            int a = b & 0xFF;
+            int b0 = a >> 4;
+            int b1 = a & 0xf;
+
+            chars[i * 2] = (char) (b0 + (b0 < 10 ? 48 : 55));
+            chars[i * 2 + 1] = (char) (b1 + (b1 < 10 ? 48 : 55));
+        }
+
+        return new String(chars);
+    }
+
+    public static String hex_t(long hash) {
+        byte[] bytes = new byte[8];
+
+        bytes[7] = (byte) (hash       );
+        bytes[6] = (byte) (hash >>>  8);
+        bytes[5] = (byte) (hash >>> 16);
+        bytes[4] = (byte) (hash >>> 24);
+        bytes[3] = (byte) (hash >>> 32);
+        bytes[2] = (byte) (hash >>> 40);
+        bytes[1] = (byte) (hash >>> 48);
+        bytes[0] = (byte) (hash >>> 56);
+
+        char[] chars = new char[18];
+        chars[0] = 'T';
+        chars[1] = '_';
+        for (int i = 0; i < 8; ++i) {
+            byte b = bytes[i];
+
+            int a = b & 0xFF;
+            int b0 = a >> 4;
+            int b1 = a & 0xf;
+
+            chars[i * 2 + 2] = (char) (b0 + (b0 < 10 ? 48 : 55));
+            chars[i * 2 + 3] = (char) (b1 + (b1 < 10 ? 48 : 55));
+        }
+
+        return new String(chars);
+    }
+
+    public static long fnv_64(String input) {
+        if (input == null) {
+            return 0;
+        }
+
+        long hash = 0x811c9dc5;
+        for (int i = 0; i < input.length(); ++i) {
+            char c = input.charAt(i);
+            hash ^= c;
+            hash *= 0x1000193;
+        }
+
+        return hash;
+    }
+
+    public static long fnv_64_lower(String input) {
+        if (input == null) {
+            return 0;
+        }
+
+        long hash = 0x811c9dc5;
+        for (int i = 0; i < input.length(); ++i) {
+            char c = input.charAt(i);
+            if (c >= 'A' && c <= 'Z') {
+                c += 32;
+            }
+            hash ^= c;
+            hash *= 0x1000193;
+        }
+
+        return hash;
+    }
 }

src/test/java/com/alibaba/druid/benckmark/sql/MySqlPerfMain_schemaStat.java

@@ -0,0 +1,84 @@
+/*
+ * Copyright 1999-2017 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.benckmark.sql;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlOutputVisitor;
+import com.alibaba.druid.sql.test.TestUtils;
+import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
+import com.alibaba.druid.util.JdbcConstants;
+import com.alibaba.druid.util.Utils;
+
+import java.lang.management.ManagementFactory;
+import java.util.List;
+
+public class MySqlPerfMain_schemaStat {
+
+    public static void main(String[] args) throws Exception {
+        System.out.println(System.getProperty("java.vm.name") + " " + System.getProperty("java.runtime.version"));
+        List<String> arguments = ManagementFactory.getRuntimeMXBean().getInputArguments();
+        System.out.println(arguments);
+
+        String sql = "select * from t ";
+        for (int i = 0; i < 300; ++i) {
+            if (i == 0) {
+                sql += " WHERE ";
+            } else {
+                sql += " OR ";
+            }
+            sql += (" id = " + i);
+        }
+        
+        for (int i = 0; i < 10; ++i) {
+            perfMySql(sql);
+        }
+    }
+
+    static long perfMySql(String sql) {
+        long startYGC = TestUtils.getYoungGC();
+        long startYGCTime = TestUtils.getYoungGCTime();
+        long startFGC = TestUtils.getFullGC();
+
+        long startMillis = System.currentTimeMillis();
+        for (int i = 0; i < 100 * 1; ++i) {
+            execMySql(sql);
+        }
+        long millis = System.currentTimeMillis() - startMillis;
+
+        long ygc = TestUtils.getYoungGC() - startYGC;
+        long ygct = TestUtils.getYoungGCTime() - startYGCTime;
+        long fgc = TestUtils.getFullGC() - startFGC;
+
+        System.out.println("MySql\t" + millis + ", ygc " + ygc + ", ygct " + ygct + ", fgc " + fgc);
+        return millis;
+    }
+
+    static String execMySql(String sql) {
+        List<SQLStatement> statementList = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);
+        SchemaStatVisitor statVisitor = SQLUtils.createSchemaStatVisitor(JdbcConstants.MYSQL);
+
+        for (SQLStatement stmt : statementList) {
+            stmt.accept(statVisitor);
+        }
+        // for (SQLStatement statement : statementList) {
+        // statement.accept(visitor);
+        // visitor.println();
+        // }
+        return "";
+    }
+}

src/test/java/com/alibaba/druid/bvt/filter/wall/mysql/MySqlWallTest87.java

@@ -37,7 +37,7 @@ public class MySqlWallTest87 extends TestCase {
         Assert.assertTrue(provider.checkValid(//
         "CREATE VIEW test.v AS SELECT * FROM t;"));
 
-        Assert.assertEquals(1, provider.getTableStats().size());
+        Assert.assertEquals(2, provider.getTableStats().size());
         Assert.assertTrue(provider.getTableStats().containsKey("t"));
     }
 

src/test/java/com/alibaba/druid/bvt/sql/oracle/DesensitizationTest.java

@@ -0,0 +1,44 @@
+package com.alibaba.druid.bvt.sql.oracle;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.util.JdbcConstants;
+import junit.framework.TestCase;
+
+/**
+ * Created by wenshao on 19/06/2017.
+ */
+public class DesensitizationTest extends TestCase {
+    public void test_for_desensitization() throws Exception {
+        String sql = "select id, name from mytable where id = 3";
+
+        SQLUtils.FormatOption option = new SQLUtils.FormatOption();
+        option.setDesensitize(true);
+        option.setParameterized(true);
+
+        String desens_Sql = SQLUtils.format(sql, JdbcConstants.ORACLE, option);
+        System.out.println(sql);
+        System.out.println("-------------------");
+        System.out.println(desens_Sql);
+
+        assertEquals("SELECT id, name\n" +
+                "FROM T_771DB81F525E1E75\n" +
+                "WHERE id = ?", desens_Sql);
+    }
+
+    public void test_for_desensitization_1() throws Exception {
+        String sql = "select id, name from \"mytable\" where id = 3";
+
+        SQLUtils.FormatOption option = new SQLUtils.FormatOption();
+        option.setDesensitize(true);
+        option.setParameterized(true);
+
+        String desens_Sql = SQLUtils.format(sql, JdbcConstants.ORACLE, option);
+        System.out.println(sql);
+        System.out.println("-------------------");
+        System.out.println(desens_Sql);
+
+        assertEquals("SELECT id, name\n" +
+                "FROM T_771DB81F525E1E75\n" +
+                "WHERE id = ?", desens_Sql);
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/oracle/DesensitizationTest_createTable.java

@@ -0,0 +1,33 @@
+package com.alibaba.druid.bvt.sql.oracle;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.util.JdbcConstants;
+import junit.framework.TestCase;
+
+/**
+ * Created by wenshao on 19/06/2017.
+ */
+public class DesensitizationTest_createTable extends TestCase {
+    public void test_for_desensitization() throws Exception {
+        String sql = "CREATE TABLE customers\n" +
+                "( customer_id number(10) NOT NULL,\n" +
+                "  customer_name varchar2(50) NOT NULL,\n" +
+                "  city varchar2(50)\n" +
+                ");";
+
+        SQLUtils.FormatOption option = new SQLUtils.FormatOption();
+        option.setDesensitize(true);
+        option.setParameterized(true);
+
+        String desens_Sql = SQLUtils.format(sql, JdbcConstants.ORACLE, option);
+        System.out.println(sql);
+        System.out.println("-------------------");
+        System.out.println(desens_Sql);
+
+        assertEquals("CREATE TABLE T_69BFC132C09344DE (\n" +
+                "\tcustomer_id number(10) NOT NULL,\n" +
+                "\tcustomer_name varchar2(50) NOT NULL,\n" +
+                "\tcity varchar2(50)\n" +
+                ");", desens_Sql);
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/oracle/DesensitizationTest_createView.java

@@ -0,0 +1,46 @@
+package com.alibaba.druid.bvt.sql.oracle;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.util.JdbcConstants;
+import junit.framework.TestCase;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Created by wenshao on 19/06/2017.
+ */
+public class DesensitizationTest_createView extends TestCase {
+    public void test_for_desensitization() throws Exception {
+        String sql = "CREATE VIEW sup_orders AS\n" +
+                "  SELECT suppliers.supplier_id, orders.quantity, orders.price\n" +
+                "  FROM suppliers\n" +
+                "  INNER JOIN orders\n" +
+                "  ON suppliers.supplier_id = orders.supplier_id\n" +
+                "  WHERE suppliers.supplier_name = 'Microsoft';";
+
+        SQLUtils.FormatOption option = new SQLUtils.FormatOption();
+        option.setDesensitize(true);
+        option.setParameterized(true);
+
+        String desens_Sql = SQLUtils.format(sql, JdbcConstants.ORACLE, option);
+        System.out.println(sql);
+        System.out.println("-------------------");
+        System.out.println(desens_Sql);
+
+        assertEquals("CREATE VIEW T_14856F0E5B66E911\n" +
+                "AS\n" +
+                "SELECT suppliers.supplier_id, orders.quantity, orders.price\n" +
+                "FROM T_126BF2439561E30E\n" +
+                "\tINNER JOIN T_C5B90BBF325E96EC ON suppliers.supplier_id = orders.supplier_id \n" +
+                "WHERE suppliers.supplier_name = ?;", desens_Sql);
+
+        Map<String, String> tableMapping = new HashMap<String, String>();
+        tableMapping.put(SQLUtils.desensitizeTable("sup_orders"), "sup_orders");
+        tableMapping.put(SQLUtils.desensitizeTable("suppliers"), "suppliers");
+
+        String restore_sql = SQLUtils.refactor(desens_Sql, JdbcConstants.ORACLE, tableMapping);
+        System.out.println("-------------------");
+        System.out.println(restore_sql);
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/oracle/DesensitizationTest_delete.java

@@ -0,0 +1,27 @@
+package com.alibaba.druid.bvt.sql.oracle;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.util.JdbcConstants;
+import junit.framework.TestCase;
+
+/**
+ * Created by wenshao on 19/06/2017.
+ */
+public class DesensitizationTest_delete extends TestCase {
+    public void test_for_desensitization() throws Exception {
+        String sql = "DELETE FROM customers\n" +
+                "WHERE last_name = 'Smith';";
+
+        SQLUtils.FormatOption option = new SQLUtils.FormatOption();
+        option.setDesensitize(true);
+        option.setParameterized(true);
+
+        String desens_Sql = SQLUtils.format(sql, JdbcConstants.ORACLE, option);
+        System.out.println(sql);
+        System.out.println("-------------------");
+        System.out.println(desens_Sql);
+
+        assertEquals("DELETE FROM T_69BFC132C09344DE\n" +
+                "WHERE last_name = ?;", desens_Sql);
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/oracle/DesensitizationTest_insert.java

@@ -0,0 +1,32 @@
+package com.alibaba.druid.bvt.sql.oracle;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.util.JdbcConstants;
+import junit.framework.TestCase;
+
+/**
+ * Created by wenshao on 19/06/2017.
+ */
+public class DesensitizationTest_insert extends TestCase {
+    public void test_for_desensitization() throws Exception {
+        String sql = "INSERT INTO suppliers\n" +
+                "(supplier_id, supplier_name)\n" +
+                "SELECT account_no, name\n" +
+                "FROM customers\n" +
+                "WHERE customer_id > 5000;";
+
+        SQLUtils.FormatOption option = new SQLUtils.FormatOption();
+        option.setDesensitize(true);
+        option.setParameterized(true);
+
+        String desens_Sql = SQLUtils.format(sql, JdbcConstants.ORACLE, option);
+        System.out.println(sql);
+        System.out.println("-------------------");
+        System.out.println(desens_Sql);
+
+        assertEquals("INSERT INTO T_126BF2439561E30E (supplier_id, supplier_name)\n" +
+                "SELECT account_no, name\n" +
+                "FROM T_69BFC132C09344DE\n" +
+                "WHERE customer_id > ?;", desens_Sql);
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/oracle/DesensitizationTest_update.java

@@ -0,0 +1,29 @@
+package com.alibaba.druid.bvt.sql.oracle;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.util.JdbcConstants;
+import junit.framework.TestCase;
+
+/**
+ * Created by wenshao on 19/06/2017.
+ */
+public class DesensitizationTest_update extends TestCase {
+    public void test_for_desensitization() throws Exception {
+        String sql = "UPDATE customers\n" +
+                "SET last_name = 'Anderson'\n" +
+                "WHERE customer_id = 5000;";
+
+        SQLUtils.FormatOption option = new SQLUtils.FormatOption();
+        option.setDesensitize(true);
+        option.setParameterized(true);
+
+        String desens_Sql = SQLUtils.format(sql, JdbcConstants.ORACLE, option);
+        System.out.println(sql);
+        System.out.println("-------------------");
+        System.out.println(desens_Sql);
+
+        assertEquals("UPDATE T_69BFC132C09344DE\n" +
+                "SET last_name = ?\n" +
+                "WHERE customer_id = ?;", desens_Sql);
+    }
+}

src/test/java/com/alibaba/druid/bvt/utils/Fnv64_lower_test.java

@@ -0,0 +1,14 @@
+package com.alibaba.druid.bvt.utils;
+
+import com.alibaba.druid.util.Utils;
+import junit.framework.TestCase;
+
+/**
+ * Created by wenshao on 19/06/2017.
+ */
+public class Fnv64_lower_test extends TestCase {
+    public void test_fnv_lower() throws Exception {
+        assertEquals(Utils.fnv_64_lower("Id"), Utils.fnv_64_lower("ID"));
+        assertEquals(Utils.fnv_64_lower("id"), Utils.fnv_64_lower("ID"));
+    }
+}