fix: some optimize

@@ -21,7 +21,7 @@ type TablePreviewCommand struct {
 }
 }
 
 
 func (cmd *TablePreviewCommand) Valid(validation *validation.Validation) {
 func (cmd *TablePreviewCommand) Valid(validation *validation.Validation) {
-	if cmd.UseCache && cmd.PageSize == 0 {
+	if cmd.UseCache && cmd.PageSize == 0 && cmd.Where.PageSize == 0 {
 		cmd.PageNumber = 1
 		cmd.PageNumber = 1
 		cmd.PageSize = 30000 //默认缓存前30000条
 		cmd.PageSize = 30000 //默认缓存前30000条
 	}
 	}