diff --git a/config.js b/config.js
index dc6b3b8..b8f60b8 100644
--- a/config.js
+++ b/config.js
@@ -13,7 +13,7 @@ module.exports = {
     'timestamp': 'TIMESTAMP',
     'timestamptz': 'TIMESTAMP',  // PostgreSQL timestamp with time zone
     'bool': 'BIT',
-    'text': 'TEXT',
+    'text': 'VARCHAR(8000)',     // 达梦的TEXT是CLOB不能建索引，改用VARCHAR
     'bytea': 'BLOB',
     'float8': 'DOUBLE',          // PostgreSQL double precision
     'float4': 'REAL',            // PostgreSQL real/float
diff --git a/converter.js b/converter.js
index 817ede2..75d09f0 100644
--- a/converter.js
+++ b/converter.js
@@ -44,7 +44,7 @@ class PG2DMConverter {
     let converted = sql;
     
     // 1. 转换基本类型（包括浮点类型和时间戳类型）
-    const typePattern = /\b(int8|int4|int2|numeric|bool|float8|float4|float|timestamptz)\b/gi;
+    const typePattern = /\b(int8|int4|int2|numeric|bool|float8|float4|float|timestamptz|text)\b/gi;
     
     converted = converted.replace(typePattern, (match) => {
       const lowerMatch = match.toLowerCase();
@@ -63,6 +63,27 @@ class PG2DMConverter {
       return `TIMESTAMP`;
     });
 
+    // 3. 移除时区子句
+    // PostgreSQL: TIMESTAMP without time zone / TIMESTAMP with time zone
+    // 达梦: TIMESTAMP (不支持时区子句)
+    converted = converted.replace(/TIMESTAMP\s+(without|with)\s+time\s+zone/gi, 'TIMESTAMP');
+    const timezoneMatches = sql.match(/TIMESTAMP\s+(without|with)\s+time\s+zone/gi);
+    if (timezoneMatches) {
+      this.log(`移除 ${timezoneMatches.length} 个TIMESTAMP时区子句`);
+    }
+
+    // 4. 修正DECIMAL精度超出范围
+    // 达梦DECIMAL最大精度38位，PostgreSQL可以到1000位
+    converted = converted.replace(/DECIMAL\s*\((\d+)\s*,\s*(\d+)\)/gi, (match, precision, scale) => {
+      const p = parseInt(precision);
+      const s = parseInt(scale);
+      if (p > 38) {
+        this.warn(`DECIMAL(${p},${s}) 精度超出达梦限制(最大38)，已调整为DECIMAL(38,${s})`);
+        return `DECIMAL(38,${s})`;
+      }
+      return match;
+    });
+
     return converted;
   }
 
@@ -177,17 +198,14 @@ class PG2DMConverter {
   removeTypeQuotes(sql) {
     let converted = sql;
     
-    // 先统一小写的text类型为TEXT（避免和"text_ops"操作符混淆）
-    converted = converted.replace(/\s+text\s+/gi, ' TEXT ');
-    converted = converted.replace(/\s+text([,\n\r])/gi, ' TEXT$1');
-    
     // 移除引号中的数据类型（达梦不需要给类型加引号）
-    // 必须在独立的步骤中处理，确保不会误伤列名
-    // 匹配模式：前面有空格，后面有空格或逗号
-    converted = converted.replace(/\s"(BIGINT|INT|SMALLINT|TINYINT|DECIMAL|NUMERIC|VARCHAR|CHAR|TEXT|DATE|TIME|TIMESTAMP|BIT|BOOLEAN|BOOL|BLOB|CLOB)"\s/gi, ' $1 ');
+    // 1. 先处理带括号的类型：VARCHAR(8000), DECIMAL(20,6)等
+    converted = converted.replace(/\s"(VARCHAR|CHAR|DECIMAL|NUMERIC)\s*\([^)]+\)"\s/gi, ' $1 ');
+    converted = converted.replace(/\s"(VARCHAR|CHAR|DECIMAL|NUMERIC)\s*\([^)]+\)"([,\n\r])/gi, ' $1$2');
     
-    // 处理行尾的类型（后面紧跟换行或逗号）
-    converted = converted.replace(/\s"(BIGINT|INT|SMALLINT|TINYINT|DECIMAL|NUMERIC|VARCHAR|CHAR|TEXT|DATE|TIME|TIMESTAMP|BIT|BOOLEAN|BOOL|BLOB|CLOB)"([,\n\r])/gi, ' $1$2');
+    // 2. 再处理简单类型
+    converted = converted.replace(/\s"(BIGINT|INT|SMALLINT|TINYINT|VARCHAR|CHAR|TEXT|DATE|TIME|TIMESTAMP|BIT|BOOLEAN|BOOL|BLOB|CLOB)"\s/gi, ' $1 ');
+    converted = converted.replace(/\s"(BIGINT|INT|SMALLINT|TINYINT|VARCHAR|CHAR|TEXT|DATE|TIME|TIMESTAMP|BIT|BOOLEAN|BOOL|BLOB|CLOB)"([,\n\r])/gi, ' $1$2');
     
     this.log('移除数据类型引号');