add testcase for #4429

src/test/java/com/alibaba/druid/bvt/sql/mysql/issues/Issue4429.java

@@ -0,0 +1,39 @@
+package com.alibaba.druid.bvt.sql.mysql.issues;
+
+import com.alibaba.druid.DbType;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.parser.SQLParserUtils;
+import com.alibaba.druid.sql.parser.SQLStatementParser;
+import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat;
+import org.junit.Test;
+
+import java.util.Map;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+
+public class Issue4429 {
+    protected final DbType dbType = DbType.mysql;
+
+    @Test
+    public void test_idle2() throws Exception {
+        String sql = "SELECT \n" +
+                "    GROUP_CONCAT(DISTINCT v\n" +
+                "        ORDER BY v ASC\n" +
+                "        SEPARATOR ';')\n" +
+                "FROM\n" +
+                "    t;";
+        SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
+        SQLStatement stmt = parser.parseStatement();
+        SchemaStatVisitor visitor = SQLUtils.createSchemaStatVisitor(dbType);
+
+        stmt.accept(visitor);
+        Map<TableStat.Name, TableStat> tableMap = visitor.getTables();
+        assertFalse(tableMap.isEmpty());
+
+        assertEquals("SELECT GROUP_CONCAT(DISTINCT v ORDER BY v ASC SEPARATOR ';')\n" +
+                "FROM t", stmt.toString());
+    }
+}