add

src/main/java/com/alibaba/druid/sql/repository/Schema.java

@@ -340,6 +340,10 @@ public class Schema {
         return this.objects.values();
     }
 
+    public boolean removeObject(Long nameHashCode64) {
+        return this.objects.remove(nameHashCode64) != null;
+    }
+
     public int getViewCount() {
         int count = 0;
         for (SchemaObject object : this.objects.values()) {

src/main/java/com/alibaba/druid/sql/repository/SchemaRepository.java

@@ -348,6 +348,12 @@ public class SchemaRepository {
         return getDefaultSchema().getTables(x);
     }
 
+    public boolean removeTable(SQLName name) {
+        return getDefaultSchema()
+                .removeObject(
+                        name.nameHashCode64());
+    }
+
     public int getTableCount() {
         return getDefaultSchema().getTableCount();
     }

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

@@ -1006,9 +1006,9 @@ public class SchemaStatVisitor extends SQLASTVisitorAdapter {
         SQLExpr original = expr;
 
         for (int i = 0;;i++) {
-//            if (i > 100) {
-//                return null;
-//            }
+            if (i > 1000) {
+                return null;
+            }
 
             if (expr instanceof SQLMethodInvokeExpr) {
                 SQLMethodInvokeExpr methodInvokeExp = (SQLMethodInvokeExpr) expr;
@@ -1924,12 +1924,6 @@ public class SchemaStatVisitor extends SQLASTVisitorAdapter {
         if (isSimpleExprTableSource(x)) {
             TableStat stat = getTableStatWithUnwrap(expr);
             if (stat == null) {
-                if (expr instanceof SQLIdentifierExpr
-                        && ((SQLIdentifierExpr) expr).getResolvedOwnerObject() instanceof SQLCreateViewStatement) {
-                    SQLCreateViewStatement createView = (SQLCreateViewStatement) ((SQLIdentifierExpr) expr).getResolvedOwnerObject();
-                    createView.getSubQuery().accept(this);
-                }
-
                 return false;
             }
 
@@ -1975,8 +1969,7 @@ public class SchemaStatVisitor extends SQLASTVisitorAdapter {
 
         SQLObject resolvedOwnerObject = identifierExpr.getResolvedOwnerObject();
         if (resolvedOwnerObject instanceof SQLSubqueryTableSource
-                || resolvedOwnerObject instanceof SQLWithSubqueryClause.Entry
-                || resolvedOwnerObject instanceof SQLCreateViewStatement) {
+                || resolvedOwnerObject instanceof SQLWithSubqueryClause.Entry) {
             return true;
         }
 
@@ -2191,6 +2184,7 @@ public class SchemaStatVisitor extends SQLASTVisitorAdapter {
 
         if (x.getSelect() != null) {
             x.getSelect().accept(this);
+            stat.incrementInsertCount();
         }
 
         SQLExprTableSource like = x.getLike();

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

@@ -40,6 +40,10 @@ public class TableStat {
     int dropIndexCount   = 0;
     int referencedCount  = 0;
 
+    public TableStat() {
+
+    }
+
     public int getReferencedCount() {
         return referencedCount;
     }

src/main/java/com/alibaba/druid/support/opds/udf/SqlCodeStat.java

@@ -1,5 +1,6 @@
 package com.alibaba.druid.support.opds.udf;
 
+import com.alibaba.druid.sql.parser.SQLParserFeature;
 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.annotation.JSONField;
 import com.alibaba.fastjson.serializer.SerializerFeature;
@@ -27,7 +28,7 @@ public class SqlCodeStat extends UDF {
         DbType dbType = dbTypeName == null ? null : DbType.valueOf(dbTypeName);
 
         try {
-            List<SQLStatement> stmtList = SQLUtils.parseStatements(sql, DbType.odps);
+            List<SQLStatement> stmtList = SQLUtils.parseStatements(sql, DbType.odps, SQLParserFeature.EnableMultiUnion);
 
             CodeStatVisitor v = new CodeStatVisitor();
             for (SQLStatement stmt : stmtList) {