diff --git a/src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java b/src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java
index 3da6ed0b16..b55d5cacf3 100644
--- a/src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java
+++ b/src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java
@@ -783,12 +783,15 @@ public class SQLExprParser extends SQLParser {
     }
 
     public final SQLExpr andRest(SQLExpr expr) throws ParserException {
-        if (lexer.token() == Token.AND || lexer.token() == Token.AMPAMP) {
-            lexer.nextToken();
-            SQLExpr rightExp = relational();
+        for (;;) {
+            if (lexer.token() == Token.AND || lexer.token() == Token.AMPAMP) {
+                lexer.nextToken();
+                SQLExpr rightExp = relational();
 
-            expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.BooleanAnd, rightExp);
-            expr = andRest(expr);
+                expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.BooleanAnd, rightExp);
+            } else {
+                break;
+            }
         }
 
         return expr;
@@ -800,18 +803,21 @@ public class SQLExprParser extends SQLParser {
     }
 
     public final SQLExpr orRest(SQLExpr expr) throws ParserException {
-        if (lexer.token() == Token.OR) {
-            lexer.nextToken();
-            SQLExpr rightExp = and();
 
-            expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.BooleanOr, rightExp);
-            expr = orRest(expr);
-        } else if (lexer.token() == Token.XOR) {
-            lexer.nextToken();
-            SQLExpr rightExp = and();
+        for (;;) {
+            if (lexer.token() == Token.OR) {
+                lexer.nextToken();
+                SQLExpr rightExp = and();
 
-            expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.BooleanXor, rightExp);
-            expr = orRest(expr);
+                expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.BooleanOr, rightExp);
+            } else if (lexer.token() == Token.XOR) {
+                lexer.nextToken();
+                SQLExpr rightExp = and();
+
+                expr = new SQLBinaryOpExpr(expr, SQLBinaryOperator.BooleanXor, rightExp);
+            } else {
+                break;
+            }
         }
 
         return expr;
diff --git a/src/test/java/com/alibaba/druid/sql/oracle/bvt/LargeOrTest.java b/src/test/java/com/alibaba/druid/sql/oracle/bvt/LargeOrTest.java
new file mode 100644
index 0000000000..61cdfeb9ba
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/sql/oracle/bvt/LargeOrTest.java
@@ -0,0 +1,43 @@
+package com.alibaba.druid.sql.oracle.bvt;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr;
+import com.alibaba.druid.sql.ast.expr.SQLBinaryOperator;
+import com.alibaba.druid.sql.ast.statement.SQLSelectQueryBlock;
+import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
+import com.alibaba.druid.sql.dialect.oracle.parser.OracleStatementParser;
+
+public class LargeOrTest extends TestCase {
+
+    public void test_largeOr() throws Exception {
+        StringBuffer buf = new StringBuffer();
+        buf.append("SELECT 1 FROM T WHERE ID = ?");
+        for (int i = 0; i < 10000; ++i) {
+            buf.append(" OR ID = ?");
+        }
+        String sql = buf.toString();
+        OracleStatementParser parser = new OracleStatementParser(sql);
+        SQLSelectStatement stmt = (SQLSelectStatement) parser.parseStatementList().get(0);
+        SQLSelectQueryBlock select = (SQLSelectQueryBlock) stmt.getSelect().getQuery();
+        SQLBinaryOpExpr where = (SQLBinaryOpExpr) select.getWhere();
+        SQLBinaryOpExpr last = (SQLBinaryOpExpr) where.getRight();
+        Assert.assertEquals(SQLBinaryOperator.Equality, last.getOperator());
+    }
+    
+    public void test_largeAnd() throws Exception {
+        StringBuffer buf = new StringBuffer();
+        buf.append("SELECT 1 FROM T WHERE ID = ?");
+        for (int i = 0; i < 10000; ++i) {
+            buf.append(" AND ID = ?");
+        }
+        String sql = buf.toString();
+        OracleStatementParser parser = new OracleStatementParser(sql);
+        SQLSelectStatement stmt = (SQLSelectStatement) parser.parseStatementList().get(0);
+        SQLSelectQueryBlock select = (SQLSelectQueryBlock) stmt.getSelect().getQuery();
+        SQLBinaryOpExpr where = (SQLBinaryOpExpr) select.getWhere();
+        SQLBinaryOpExpr last = (SQLBinaryOpExpr) where.getRight();
+        Assert.assertEquals(SQLBinaryOperator.Equality, last.getOperator());
+    }
+}