diff --git a/pigx-common/pigx-common-sequence/src/main/java/com/pig4cloud/pigx/common/sequence/SequenceAutoConfiguration.java b/pigx-common/pigx-common-sequence/src/main/java/com/pig4cloud/pigx/common/sequence/SequenceAutoConfiguration.java
index fea0c3bb5..1411fb64b 100644
--- a/pigx-common/pigx-common-sequence/src/main/java/com/pig4cloud/pigx/common/sequence/SequenceAutoConfiguration.java
+++ b/pigx-common/pigx-common-sequence/src/main/java/com/pig4cloud/pigx/common/sequence/SequenceAutoConfiguration.java
@@ -23,6 +23,7 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.anyline.metadata.Column;
 import org.anyline.metadata.Index;
+import org.anyline.metadata.PrimaryKey;
 import org.anyline.metadata.Table;
 import org.anyline.proxy.ServiceProxy;
 import org.anyline.service.AnylineService;
@@ -55,20 +56,39 @@ public class SequenceAutoConfiguration {
         AnylineService service = ServiceProxy.service();
         Table tableMetadata = service.metadata().table(sequenceDbProperties.getDb().getTableName(), false);
         if (Objects.isNull(tableMetadata)) {
-            Table table = Table.from(SequenceTable.class);
-            table.setName(sequenceDbProperties.getDb().getTableName());
-            table.setComment("序列号区间管理表");
-            table.setPrimaryKey(SequenceTable.Fields.id);
-            LinkedHashMap<String, Index> indexLinkedHashMap = new LinkedHashMap<>();
-            Index nameUnique = new Index(SequenceTable.Fields.name);
-            nameUnique.setUnique(true);
-            nameUnique.addColumn(new Column(SequenceTable.Fields.name));
-            indexLinkedHashMap.put(SequenceTable.Fields.name, nameUnique);
-            table.setIndexes(indexLinkedHashMap);
-
+            Table table = buildSequenceTable(sequenceDbProperties.getDb().getTableName());
             service.ddl().create(table);
             log.debug("发号器自动创建表成功:{} ", table);
         }
     }
 
+    /**
+     * 构建发号器表结构
+     * @param tableName 表名
+     * @return 表定义
+     */
+    static Table buildSequenceTable(String tableName) {
+        Table table = Table.from(SequenceTable.class);
+        table.setName(tableName);
+        table.setComment("序列号区间管理表");
+        // Table.from 不会填充 originType，缺失时 DDL 阶段无法按目标库转换类型
+        // （如 PostgreSQL 下 DATETIME 需转为 TIMESTAMP），会原样输出导致建表失败
+        for (Object o : table.getColumns().values()) {
+            Column column = (Column) o;
+            column.setOriginType(column.getTypeName());
+        }
+        // 显式主键约束名：anyline 随机生成的约束名可能以数字开头，属 SQL 语法错误
+        PrimaryKey primaryKey = new PrimaryKey();
+        primaryKey.setName("pk_" + tableName);
+        primaryKey.addColumn(new Column(SequenceTable.Fields.id));
+        table.setPrimaryKey(primaryKey);
+        LinkedHashMap<String, Index> indexLinkedHashMap = new LinkedHashMap<>();
+        Index nameUnique = new Index(SequenceTable.Fields.name);
+        nameUnique.setUnique(true);
+        nameUnique.addColumn(new Column(SequenceTable.Fields.name));
+        indexLinkedHashMap.put(SequenceTable.Fields.name, nameUnique);
+        table.setIndexes(indexLinkedHashMap);
+        return table;
+    }
+
 }
diff --git a/pigx-common/pigx-common-sequence/src/test/java/com/pig4cloud/pigx/common/sequence/SequenceAutoConfigurationTests.java b/pigx-common/pigx-common-sequence/src/test/java/com/pig4cloud/pigx/common/sequence/SequenceAutoConfigurationTests.java
new file mode 100644
index 000000000..33f84ad59
--- /dev/null
+++ b/pigx-common/pigx-common-sequence/src/test/java/com/pig4cloud/pigx/common/sequence/SequenceAutoConfigurationTests.java
@@ -0,0 +1,46 @@
+package com.pig4cloud.pigx.common.sequence;
+
+import org.anyline.adapter.init.DefaultEnvironmentWorker;
+import org.anyline.metadata.Column;
+import org.anyline.metadata.Table;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class SequenceAutoConfigurationTests {
+
+    @BeforeAll
+    static void initAnylineEnvironment() {
+        DefaultEnvironmentWorker.start();
+    }
+
+    /**
+     * Table.from 不会填充 originType，缺失时 DDL 阶段按目标库的类型转换（如
+     * PostgreSQL 下 DATETIME -> TIMESTAMP）会被跳过，直接输出 DATETIME 导致建表失败。
+     */
+    @Test
+    void everyColumnCarriesOriginTypeForDialectConversion() {
+        Table table = SequenceAutoConfiguration.buildSequenceTable("pigx_sequence");
+
+        for (Object o : table.getColumns().values()) {
+            Column column = (Column) o;
+            assertThat(column.getOriginType()).as("column %s originType", column.getName())
+                .isEqualTo(column.getTypeName());
+        }
+    }
+
+    /**
+     * anyline 随机生成的主键约束名可能以数字开头，未加引号时在 PostgreSQL / MySQL
+     * 下都是语法错误，必须显式命名。
+     */
+    @Test
+    void primaryKeyHasExplicitName() {
+        Table table = SequenceAutoConfiguration.buildSequenceTable("pigx_sequence");
+
+        assertThat(table.getPrimaryKey()).isNotNull();
+        assertThat(table.getPrimaryKey().getName()).isEqualTo("pk_pigx_sequence");
+        assertThat(table.getPrimaryKey().getColumns()).containsKey("ID");
+    }
+
+}