- 增加 表达式函数 string.IsNullOrWhiteSpace 解析；

Providers/FreeSql.Provider.PostgreSQL/FreeSql.Provider.PostgreSQL.csproj

@@ -2,7 +2,7 @@
 
 	<PropertyGroup>
 		<TargetFrameworks>netstandard2.0;net45</TargetFrameworks>
-		<Version>0.8.1</Version>
+		<Version>0.8.2</Version>
 		<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
 		<Authors>YeXiangQin</Authors>
 		<Description>FreeSql 数据库实现，基于 PostgreSQL 9.5</Description>

Providers/FreeSql.Provider.PostgreSQL/PostgreSQLExpression.cs

@@ -344,6 +344,9 @@ namespace FreeSql.PostgreSQL
                     case "IsNullOrEmpty":
                         var arg1 = getExp(exp.Arguments[0]);
                         return $"({arg1} is null or {arg1} = '')";
+                    case "IsNullOrWhiteSpace":
+                        var arg2 = getExp(exp.Arguments[0]);
+                        return $"({arg2} is null or {arg2} = '' or ltrim({arg2}) = '')";
                     case "Concat":
                         return _common.StringConcat(exp.Arguments.Select(a => getExp(a)).ToArray(), null);
                 }