修复mysql语句中partition和别名的顺序问题 #5351

core/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlOutputVisitor.java

@@ -3599,6 +3599,12 @@ public boolean visit(SQLExprTableSource x) {
             sampling.accept(this);
         }
 
+        if (x.getPartitionSize() > 0) {
+            print0(ucase ? " PARTITION (" : " partition (");
+            printlnAndAccept(x.getPartitions(), ", ");
+            print(')');
+        }
+
         String alias = x.getAlias();
         List<SQLName> columns = x.getColumnsDirect();
         if (alias != null) {
@@ -3620,12 +3626,6 @@ public boolean visit(SQLExprTableSource x) {
             x.getHints().get(i).accept(this);
         }
 
-        if (x.getPartitionSize() > 0) {
-            print0(ucase ? " PARTITION (" : " partition (");
-            printlnAndAccept(x.getPartitions(), ", ");
-            print(')');
-        }
-
         return false;
     }
 

core/src/test/java/com/alibaba/druid/bvt/sql/mysql/select/MySqlSelectTest_partition.java

@@ -0,0 +1,44 @@
+package com.alibaba.druid.bvt.sql.mysql.select;
+
+import java.util.List;
+
+import com.alibaba.druid.sql.MysqlTest;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.ast.statement.SQLExprTableSource;
+import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+
+public class MySqlSelectTest_partition extends MysqlTest {
+    public void test_0() throws Exception {
+        String sql = "select\n"
+            + "        p.id as id,\n"
+            + "        c.template_no as templateNo\n"
+            + "    from\n"
+            + "      contract_relation_party partition(p0) p\n"
+            + "    left join\n"
+            + "      contract partition(p0) c\n"
+            + "    on\n"
+            + "      p.contract_sn = c.contract_sn\n"
+            + "      and p.contract_id_no = c.id_no\n"
+            + "    where p.seal_type is null\n"
+            + "    order by p.update_time asc\n"
+            + "    limit 5";
+
+        //System.out.println(sql);
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLSelectStatement stmt = (SQLSelectStatement) statementList.get(0);
+
+        assertEquals(1, statementList.size());
+        //System.out.println(stmt.toString());
+        assertEquals("SELECT p.id AS id, c.template_no AS templateNo\n"
+            + "FROM contract_relation_party PARTITION (p0) p\n"
+            + "\tLEFT JOIN contract PARTITION (p0) c\n"
+            + "\tON p.contract_sn = c.contract_sn\n"
+            + "\t\tAND p.contract_id_no = c.id_no\n"
+            + "WHERE p.seal_type IS NULL\n"
+            + "ORDER BY p.update_time ASC\n"
+            + "LIMIT 5", stmt.toString());
+    }
+}