diff --git a/chat2db-server/chat2db-plugins/chat2db-postgresql/src/main/java/ai/chat2db/plugin/postgresql/consts/SQLConst.java b/chat2db-server/chat2db-plugins/chat2db-postgresql/src/main/java/ai/chat2db/plugin/postgresql/consts/SQLConst.java
index 22fe5e91..0938f348 100644
--- a/chat2db-server/chat2db-plugins/chat2db-postgresql/src/main/java/ai/chat2db/plugin/postgresql/consts/SQLConst.java
+++ b/chat2db-server/chat2db-plugins/chat2db-postgresql/src/main/java/ai/chat2db/plugin/postgresql/consts/SQLConst.java
@@ -42,7 +42,7 @@ public class SQLConst {
             + "        -- 约束\n"
             + "        tableScript:= tableScript || chr(13)||chr(10) || array_to_string(\n"
             + "        array(\n"
-            + "        select concat(' CONSTRAINT ',conname ,c ,u,p,f) from (\n"
+            + "        select concat(' CONSTRAINT ', conname || '_' || tablename ,c ,u,p,f) from (\n"
             + "        select conname,\n"
             + "        case when contype='c' then ' CHECK('|| ( select findattname(namespace,tablename,'c') ) ||')' "
             + "end "
@@ -109,13 +109,13 @@ public class SQLConst {
             + "        -- COMMENT COMMENT ON COLUMN sys_activity.id IS '主键';\n"
             + "        tableScript:= tableScript || chr(13)||chr(10) || chr(13)||chr(10) || array_to_string(\n"
             + "        array(\n"
-            + "        SELECT 'COMMENT ON COLUMN ' || tablename || '.' || a.attname ||' IS '|| ''''|| d.description "
+            + "        SELECT 'COMMENT ON COLUMN ' || 'namespace.tablename' || '.' || a.attname ||' IS '|| ''''|| d.description "
             + "||''''\n"
             + "        FROM pg_class c\n"
             + "        JOIN pg_description d ON c.oid=d.objoid\n"
             + "        JOIN pg_attribute a ON c.oid = a.attrelid\n"
             + "        WHERE c.relname=tablename\n"
-            + "        AND a.attnum = d.objsubid),','|| chr(13)||chr(10)) ;\n"
+            + "        AND a.attnum = d.objsubid),';'|| chr(13)||chr(10)) ;\n"
             + "\n"
             + "        return tableScript;\n"
             + "\n"