StatSchema support DropIndex

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

@@ -51,6 +51,7 @@ import com.alibaba.druid.sql.ast.statement.SQLCommentStatement;
 import com.alibaba.druid.sql.ast.statement.SQLCreateTableStatement;
 import com.alibaba.druid.sql.ast.statement.SQLCreateViewStatement;
 import com.alibaba.druid.sql.ast.statement.SQLDeleteStatement;
+import com.alibaba.druid.sql.ast.statement.SQLDropIndexStatement;
 import com.alibaba.druid.sql.ast.statement.SQLDropTableStatement;
 import com.alibaba.druid.sql.ast.statement.SQLExprTableSource;
 import com.alibaba.druid.sql.ast.statement.SQLInsertStatement;
@@ -1156,4 +1157,23 @@ public class SchemaStatVisitor extends SQLASTVisitorAdapter {
     public boolean visit(SQLAlterTableDropConstraint x) {
         return false;
     }
+    
+    @Override
+    public boolean visit(SQLDropIndexStatement x) {
+        setMode(x, Mode.DropIndex);
+        SQLName name = (SQLName) x.getTableName().getExpr();
+
+        String ident = name.toString();
+        setCurrentTable(ident);
+        
+        TableStat stat = getTableStat(ident);
+        stat.incrementDropIndexCount();
+
+        Map<String, String> aliasMap = getAliasMap();
+        if (aliasMap != null) {
+            aliasMap.put(ident, ident);
+        }
+        
+        return false;
+    }
 }

src/main/java/com/alibaba/druid/stat/TableStat.java

@@ -33,6 +33,15 @@ public class TableStat {
     int createCount      = 0;
     int alterCount       = 0;
     int createIndexCount = 0;
+    int dropIndexCount   = 0;
+
+    public int getDropIndexCount() {
+        return dropIndexCount;
+    }
+
+    public void incrementDropIndexCount() {
+        this.dropIndexCount++;
+    }
 
     public int getCreateIndexCount() {
         return createIndexCount;
@@ -155,6 +164,9 @@ public class TableStat {
         if (createIndexCount > 0) {
             buf.append("CreateIndex");
         }
+        if (dropIndexCount > 0) {
+            buf.append("DropIndex");
+        }
 
         return buf.toString();
     }
@@ -497,7 +509,7 @@ public class TableStat {
         Merge(16), //
         Truncate(32), //
         Alter(64), //
-        Drop(128);
+        Drop(128), DropIndex(256); //
 
         public final int mark;
 

src/test/java/com/alibaba/druid/bvt/pool/StatTest.java

@@ -0,0 +1,61 @@
+package com.alibaba.druid.bvt.pool;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.util.Map;
+
+import junit.framework.TestCase;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.pool.DruidDataSource;
+import com.alibaba.druid.pool.DruidDataSourceStatValue;
+import com.alibaba.druid.stat.DruidStatService;
+import com.alibaba.druid.stat.JdbcSqlStatValue;
+import com.alibaba.druid.support.json.JSONUtils;
+
+public class StatTest extends TestCase {
+
+    private DruidDataSource dataSource;
+
+    protected void setUp() throws Exception {
+        dataSource = new DruidDataSource();
+        dataSource.setUrl("jdbc:h2:mem:test;");
+        dataSource.setFilters("stat");
+    }
+
+    protected void tearDown() throws Exception {
+        dataSource.close();
+    }
+
+    public void test_0() throws Exception {
+        {
+            Connection conn = dataSource.getConnection();
+            PreparedStatement stmt = conn.prepareStatement("select * from INFORMATION_SCHEMA.SETTINGS");
+            ResultSet rs = stmt.executeQuery();
+            rs.close();
+            stmt.close();
+            conn.close();
+        }
+
+        DruidDataSourceStatValue dataSourceStatValue = dataSource.getStatValueAndReset();
+        Assert.assertEquals(1, dataSourceStatValue.getSqlList().size());
+        JdbcSqlStatValue sqlStat = dataSourceStatValue.getSqlList().get(0);
+        Assert.assertNotNull(sqlStat.getExecuteLastStartTime());
+        Assert.assertNotNull(sqlStat.getExecuteNanoSpanMaxOccurTime());
+        Assert.assertTrue(sqlStat.getExecuteMillisMax() > 0);
+
+        {
+            Connection conn = dataSource.getConnection();
+            PreparedStatement stmt = conn.prepareStatement("select * from INFORMATION_SCHEMA.SETTINGS");
+            ResultSet rs = stmt.executeQuery();
+            rs.close();
+            stmt.close();
+            conn.close();
+        }
+        String json = DruidStatService.getInstance().service("/sql-" + sqlStat.getId() + ".json");
+        Map map = (Map) JSONUtils.parse(json);
+        System.out.println(json);
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlDropIndexTest.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright 1999-2011 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.bvt.sql.mysql;
+
+import java.util.List;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.MysqlTest;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.ast.statement.SQLDropIndexStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat;
+
+public class MySqlDropIndexTest extends MysqlTest {
+
+    public void test_0() throws Exception {
+        String sql = "drop index index_name on table_name ";
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLDropIndexStatement stmt = (SQLDropIndexStatement) statementList.get(0);
+        print(statementList);
+
+        Assert.assertEquals(1, statementList.size());
+
+        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+        stmt.accept(visitor);
+
+        System.out.println("Tables : " + visitor.getTables());
+        System.out.println("fields : " + visitor.getColumns());
+        System.out.println("coditions : " + visitor.getConditions());
+        System.out.println("orderBy : " + visitor.getOrderByColumns());
+
+        Assert.assertEquals(1, visitor.getTables().size());
+        Assert.assertEquals(0, visitor.getColumns().size());
+        Assert.assertEquals(0, visitor.getConditions().size());
+
+        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("table_name")));
+        TableStat tableStat = visitor.getTables().get(new TableStat.Name("table_name"));
+        Assert.assertEquals(1, tableStat.getDropIndexCount());
+
+    }
+}