feat: change the default created/updated column type and mark as system field

packages/nocodb-sdk/src/lib/sqlUi/MssqlUi.ts

@@ -107,9 +107,10 @@ export class MssqlUi {
         dtxp: '',
         dtxs: '',
         altered: 1,
-        uidt: UITypes.DateTime,
+        uidt: UITypes.CreateTime,
         uip: '',
         uicn: '',
+        system: true,
       },
       {
         column_name: 'updated_at',
@@ -131,9 +132,10 @@ export class MssqlUi {
         dtxp: '',
         dtxs: '',
         altered: 1,
-        uidt: UITypes.DateTime,
+        uidt: UITypes.LastModifiedTime,
         uip: '',
         uicn: '',
+        system: true,
       },
     ];
   }

packages/nocodb-sdk/src/lib/sqlUi/MysqlUi.ts

@@ -111,9 +111,10 @@ export class MysqlUi {
         dtxp: '',
         dtxs: '',
         altered: 1,
-        uidt: UITypes.DateTime,
+        uidt: UITypes.CreateTime,
         uip: '',
         uicn: '',
+        system: true,
       },
       {
         column_name: 'updated_at',
@@ -134,9 +135,10 @@ export class MysqlUi {
         dtxp: '',
         dtxs: '',
         altered: 1,
-        uidt: UITypes.DateTime,
+        uidt: UITypes.LastModifiedTime,
         uip: '',
         uicn: '',
+        system: true,
       },
     ];
   }
@@ -1073,11 +1075,11 @@ export class MysqlUi {
         break;
       case 'CreateTime':
         colProp.dt = 'timestamp';
-        colProp.cdf = 'CURRENT_TIMESTAMP'
+        colProp.cdf = 'CURRENT_TIMESTAMP';
         break;
       case 'LastModifiedTime':
         colProp.dt = 'timestamp';
-        colProp.cdf = 'CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP'
+        colProp.cdf = 'CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP';
         break;
       case 'AutoNumber':
         colProp.dt = 'int';

packages/nocodb-sdk/src/lib/sqlUi/PgUi.ts

@@ -170,9 +170,10 @@ export class PgUi {
         dtxp: '',
         dtxs: '',
         altered: 1,
-        uidt: UITypes.DateTime,
+        uidt: UITypes.CreateTime,
         uip: '',
         uicn: '',
+        system: true,
       },
       {
         column_name: 'updated_at',
@@ -194,9 +195,10 @@ export class PgUi {
         dtxp: '',
         dtxs: '',
         altered: 1,
-        uidt: UITypes.DateTime,
+        uidt: UITypes.LastModifiedTime,
         uip: '',
         uicn: '',
+        system: true,
       },
     ];
   }

packages/nocodb-sdk/src/lib/sqlUi/SnowflakeUi.ts

@@ -106,9 +106,10 @@ export class SnowflakeUi {
         dtxp: '',
         dtxs: '',
         altered: 1,
-        uidt: UITypes.DateTime,
+        uidt: UITypes.CreateTime,
         uip: '',
         uicn: '',
+        system: true,
       },
       {
         column_name: 'updated_at',
@@ -130,9 +131,10 @@ export class SnowflakeUi {
         dtxp: '',
         dtxs: '',
         altered: 1,
-        uidt: UITypes.DateTime,
+        uidt: UITypes.LastModifiedTime,
         uip: '',
         uicn: '',
+        system: true,
       },
     ];
   }

packages/nocodb-sdk/src/lib/sqlUi/SqliteUi.ts

@@ -94,9 +94,10 @@ export class SqliteUi {
         dtxp: '',
         dtxs: '',
         altered: 1,
-        uidt: UITypes.DateTime,
+        uidt: UITypes.CreateTime,
         uip: '',
         uicn: '',
+        system: true,
       },
       {
         column_name: 'updated_at',
@@ -117,9 +118,10 @@ export class SqliteUi {
         dtxp: '',
         dtxs: '',
         altered: 1,
-        uidt: UITypes.DateTime,
+        uidt: UITypes.LastModifiedTime,
         uip: '',
         uicn: '',
+        system: true,
       },
     ];
   }
@@ -628,11 +630,11 @@ export class SqliteUi {
         break;
       case 'CreateTime':
         colProp.dt = 'datetime';
-        colProp.cdf =  'CURRENT_TIMESTAMP';
+        colProp.cdf = 'CURRENT_TIMESTAMP';
         break;
       case 'LastModifiedTime':
         colProp.dt = 'datetime';
-        colProp.cdf =  'CURRENT_TIMESTAMP';
+        colProp.cdf = 'CURRENT_TIMESTAMP';
         break;
       case 'AutoNumber':
         colProp.dt = 'integer';