- 增加 Firebird string.Join + ToList 表达式解析，实现与 MySql group_concat 相同的效果 #443；

FreeSql.Tests/FreeSql.Tests/Firebird/FirebirdExpression/StringTest.cs

@@ -53,7 +53,7 @@ namespace FreeSql.Tests.FirebirdExpression
         [Fact]
         public void StringJoin()
         {
-            var fsql = g.sqlite;
+            var fsql = g.firebird;
             fsql.Delete<StringJoin01>().Where("1=1").ExecuteAffrows();
             fsql.Insert(new[] { new StringJoin01 { name = "北京" }, new StringJoin01 { name = "上海" }, new StringJoin01 { name = "深圳" }, }).ExecuteAffrows();
 

FreeSql/Extensions/FreeSqlGlobalExpressionCallExtensions.cs

@@ -358,6 +358,11 @@ namespace FreeSql
             expContext.Result = $"listagg(to_char({expContext.ParsedContent["column"]}),{expContext.ParsedContent["delimiter"]}) within group({orderby})";
             return null;
         }
+        public static string StringJoinFirebirdList(object column, object delimiter)
+        {
+            expContext.Result = $"list({expContext.ParsedContent["column"]},{expContext.ParsedContent["delimiter"]})";
+            return null;
+        }
         #endregion
     }
 }

Providers/FreeSql.Provider.Firebird/FirebirdExpression.cs

@@ -255,6 +255,20 @@ namespace FreeSql.Firebird
                         //4个 {} 时，Arguments[1] 只能解析这个出来，然后里面是 NewArray []
                         var expArgs = expArgsHack.Select(a => $"'||{_common.IsNull(ExpressionLambdaToSql(a, tsc), "''")}||'").ToArray();
                         return string.Format(ExpressionLambdaToSql(exp.Arguments[0], tsc), expArgs);
+                    case "Join":
+                        if (exp.IsStringJoin(out var tolistObjectExp, out var toListMethod, out var toListArgs1))
+                        {
+                            var newToListArgs0 = Expression.Call(tolistObjectExp, toListMethod,
+                                Expression.Lambda(
+                                    Expression.Call(
+                                        typeof(SqlExtExtensions).GetMethod("StringJoinFirebirdList"),
+                                        Expression.Convert(toListArgs1.Body, typeof(object)),
+                                        Expression.Convert(exp.Arguments[0], typeof(object))),
+                                    toListArgs1.Parameters));
+                            var newToListSql = getExp(newToListArgs0);
+                            return newToListSql;
+                        }
+                        break;
                 }
             }
             else