fix: support SUBPARTITION TEMPLATE for OceanBase composite partitioning

core/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlCreateTableParser.java

@@ -1430,8 +1430,30 @@ protected void partitionClauseRest(SQLPartitionBy clause) {
 
             if (lexer.identifierEquals(FnvHash.Constants.SUBPARTITION)) {
                 lexer.nextToken();
-                acceptIdentifier("OPTIONS");
-                this.exprParser.parseAssignItem(subPartitionByClause.getOptions(), subPartitionByClause);
+                if (lexer.identifierEquals("TEMPLATE")) {
+                    lexer.nextToken();
+                    accept(Token.LPAREN);
+                    for (; ; ) {
+                        acceptIdentifier("SUBPARTITION");
+                        SQLSubPartition subPartition = new SQLSubPartition();
+                        subPartition.setName(this.exprParser.name());
+                        SQLPartitionValue values = this.exprParser.parsePartitionValues();
+                        if (values != null) {
+                            subPartition.setValues(values);
+                        }
+                        subPartition.setParent(subPartitionByClause);
+                        subPartitionByClause.getSubPartitionTemplate().add(subPartition);
+                        if (lexer.token() == Token.COMMA) {
+                            lexer.nextToken();
+                            continue;
+                        }
+                        break;
+                    }
+                    accept(Token.RPAREN);
+                } else {
+                    acceptIdentifier("OPTIONS");
+                    this.exprParser.parseAssignItem(subPartitionByClause.getOptions(), subPartitionByClause);
+                }
             }
 
             if (lexer.identifierEquals(FnvHash.Constants.SUBPARTITIONS)) {

core/src/test/java/com/alibaba/druid/bvt/sql/oceanbase/issues/Issue6160.java

@@ -0,0 +1,89 @@
+package com.alibaba.druid.bvt.sql.oceanbase.issues;
+
+import com.alibaba.druid.DbType;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.parser.SQLParserUtils;
+import com.alibaba.druid.sql.parser.SQLStatementParser;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * Fix OceanBase/Oracle SUBPARTITION TEMPLATE parsing in CREATE TABLE.
+ * <p>
+ * The MySQL parser (used by OceanBase) only recognized SUBPARTITION OPTIONS
+ * after the subpartition-by clause, but not SUBPARTITION TEMPLATE which is
+ * used to define template subpartitions for composite partitioning.
+ *
+ * @see <a href="https://github.com/alibaba/druid/issues/6160">Issue #6160</a>
+ */
+public class Issue6160 {
+    @Test
+    public void test_subpartition_template_list_range() {
+        // Exact SQL from the issue
+        String sql = "CREATE TABLE t2_m_lr(col1 INT, col2 INT)\n"
+                + "PARTITION BY LIST (col1)\n"
+                + "SUBPARTITION BY RANGE(col2)\n"
+                + "SUBPARTITION TEMPLATE\n"
+                + " (SUBPARTITION mp0 VALUES LESS THAN(100),\n"
+                + "  SUBPARTITION mp1 VALUES LESS THAN(200),\n"
+                + "  SUBPARTITION mp2 VALUES LESS THAN(300))\n"
+                + " (PARTITION p0 VALUES IN(1,3),\n"
+                + "  PARTITION p1 VALUES IN(4,6),\n"
+                + "  PARTITION p2 VALUES IN(7,9))";
+
+        for (DbType dbType : new DbType[]{DbType.oceanbase, DbType.mysql}) {
+            SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
+            List<SQLStatement> stmtList = parser.parseStatementList();
+            assertEquals(1, stmtList.size());
+        }
+    }
+
+    @Test
+    public void test_subpartition_template_range_hash() {
+        String sql = "CREATE TABLE t_range_hash(col1 INT, col2 INT)\n"
+                + "PARTITION BY RANGE(col1)\n"
+                + "SUBPARTITION BY HASH(col2)\n"
+                + "SUBPARTITION TEMPLATE\n"
+                + " (SUBPARTITION sp0,\n"
+                + "  SUBPARTITION sp1,\n"
+                + "  SUBPARTITION sp2)\n"
+                + " (PARTITION p0 VALUES LESS THAN(100),\n"
+                + "  PARTITION p1 VALUES LESS THAN(200))";
+
+        SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, DbType.oceanbase);
+        List<SQLStatement> stmtList = parser.parseStatementList();
+        assertEquals(1, stmtList.size());
+    }
+
+    @Test
+    public void test_subpartition_template_with_values_in() {
+        String sql = "CREATE TABLE t_range_list(col1 INT, col2 INT)\n"
+                + "PARTITION BY RANGE(col1)\n"
+                + "SUBPARTITION BY LIST(col2)\n"
+                + "SUBPARTITION TEMPLATE\n"
+                + " (SUBPARTITION sp0 VALUES IN(1,2,3),\n"
+                + "  SUBPARTITION sp1 VALUES IN(4,5,6))\n"
+                + " (PARTITION p0 VALUES LESS THAN(100),\n"
+                + "  PARTITION p1 VALUES LESS THAN(200))";
+
+        SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, DbType.oceanbase);
+        List<SQLStatement> stmtList = parser.parseStatementList();
+        assertEquals(1, stmtList.size());
+    }
+
+    @Test
+    public void test_subpartition_options_still_works() {
+        // Ensure existing SUBPARTITION OPTIONS parsing is not broken
+        String sql = "CREATE TABLE t_opt(id INT)\n"
+                + "PARTITION BY HASH(id)\n"
+                + "SUBPARTITION BY KEY(id)\n"
+                + "SUBPARTITIONS 4";
+
+        SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, DbType.mysql);
+        List<SQLStatement> stmtList = parser.parseStatementList();
+        assertEquals(1, stmtList.size());
+    }
+}