diff --git a/src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleUpdateParser.java b/src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleUpdateParser.java
index dcb6548b65..3e6e89da54 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleUpdateParser.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleUpdateParser.java
@@ -16,9 +16,7 @@
 package com.alibaba.druid.sql.dialect.oracle.parser;
 
 import com.alibaba.druid.sql.ast.SQLExpr;
-import com.alibaba.druid.sql.ast.expr.SQLListExpr;
 import com.alibaba.druid.sql.ast.statement.SQLTableSource;
-import com.alibaba.druid.sql.ast.statement.SQLUpdateSetItem;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateStatement;
 import com.alibaba.druid.sql.parser.Lexer;
 import com.alibaba.druid.sql.parser.ParserException;
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/postgresql/parser/PGSQLStatementParser.java b/src/main/java/com/alibaba/druid/sql/dialect/postgresql/parser/PGSQLStatementParser.java
index 7d1a4c033b..e8cb151bc2 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/postgresql/parser/PGSQLStatementParser.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/postgresql/parser/PGSQLStatementParser.java
@@ -24,7 +24,6 @@ import com.alibaba.druid.sql.ast.expr.SQLCurrentOfCursorExpr;
 import com.alibaba.druid.sql.ast.expr.SQLQueryExpr;
 import com.alibaba.druid.sql.ast.statement.SQLInsertStatement;
 import com.alibaba.druid.sql.ast.statement.SQLTableSource;
-import com.alibaba.druid.sql.ast.statement.SQLUpdateSetItem;
 import com.alibaba.druid.sql.ast.statement.SQLUpdateStatement;
 import com.alibaba.druid.sql.dialect.postgresql.ast.PGWithClause;
 import com.alibaba.druid.sql.dialect.postgresql.ast.PGWithQuery;
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/sqlserver/parser/SQLServerStatementParser.java b/src/main/java/com/alibaba/druid/sql/dialect/sqlserver/parser/SQLServerStatementParser.java
index 95671d475b..2850da6244 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/sqlserver/parser/SQLServerStatementParser.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/sqlserver/parser/SQLServerStatementParser.java
@@ -23,7 +23,6 @@ import com.alibaba.druid.sql.ast.expr.SQLQueryExpr;
 import com.alibaba.druid.sql.ast.statement.SQLInsertInto;
 import com.alibaba.druid.sql.ast.statement.SQLInsertStatement;
 import com.alibaba.druid.sql.ast.statement.SQLTableSource;
-import com.alibaba.druid.sql.ast.statement.SQLUpdateSetItem;
 import com.alibaba.druid.sql.ast.statement.SQLUpdateStatement;
 import com.alibaba.druid.sql.dialect.sqlserver.ast.stmt.SQLServerInsertStatement;
 import com.alibaba.druid.sql.dialect.sqlserver.ast.stmt.SQLServerUpdateStatement;