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- 增加 lambda 表达式树解析子查询 ToList + string.Join() 产生 类似 group_concat 的效果（适配了 sqlserver/pgsql/oracle/mysql/sqlite/达梦/金仓) #405；

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This commit is contained in:
28810
2020-08-08 16:18:10 +08:00
parent 1a8c7ce86d
commit b3ec6cdf8d
30 changed files with 614 additions and 17 deletions
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14
Providers/FreeSql.Provider.Odbc/Dameng/OdbcDamengExpression.cs
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@ -268,6 +268,20 @@ namespace FreeSql.Odbc.Dameng
//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("StringJoinOracleGroupConcat"),
Expression.Convert(toListArgs1.Body, typeof(object)),
Expression.Convert(exp.Arguments[0], typeof(object))),
toListArgs1.Parameters));
var newToListSql = getExp(newToListArgs0);
return newToListSql;
}
break;
}
}
else

14
Providers/FreeSql.Provider.Odbc/KingbaseES/OdbcKingbaseESExpression.cs
View File

@ -337,6 +337,20 @@ namespace FreeSql.Odbc.KingbaseES
return $"'||{_common.IsNull($"({ExpressionLambdaToSql(a, tsc)})::text", "''")}||'";
}).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("StringJoinPgsqlGroupConcat"),
Expression.Convert(toListArgs1.Body, typeof(object)),
Expression.Convert(exp.Arguments[0], typeof(object))),
toListArgs1.Parameters));
var newToListSql = getExp(newToListArgs0);
return newToListSql;
}
break;
}
}
else

14
Providers/FreeSql.Provider.Odbc/MySql/OdbcMySqlExpression.cs
View File

@ -265,6 +265,20 @@ namespace FreeSql.Odbc.MySql
//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 $"concat({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("StringJoinMySqlGroupConcat"),
Expression.Convert(toListArgs1.Body, typeof(object)),
Expression.Convert(exp.Arguments[0], typeof(object))),
toListArgs1.Parameters));
var newToListSql = getExp(newToListArgs0);
return newToListSql;
}
break;
}
}
else

14
Providers/FreeSql.Provider.Odbc/Oracle/OdbcOracleExpression.cs
View File

@ -268,6 +268,20 @@ namespace FreeSql.Odbc.Oracle
//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("StringJoinOracleGroupConcat"),
Expression.Convert(toListArgs1.Body, typeof(object)),
Expression.Convert(exp.Arguments[0], typeof(object))),
toListArgs1.Parameters));
var newToListSql = getExp(newToListArgs0);
return newToListSql;
}
break;
}
}
else

14
Providers/FreeSql.Provider.Odbc/PostgreSQL/OdbcPostgreSQLExpression.cs
View File

@ -359,6 +359,20 @@ namespace FreeSql.Odbc.PostgreSQL
return $"'||{_common.IsNull($"({ExpressionLambdaToSql(a, tsc)})::text", "''")}||'";
}).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("StringJoinPgsqlGroupConcat"),
Expression.Convert(toListArgs1.Body, typeof(object)),
Expression.Convert(exp.Arguments[0], typeof(object))),
toListArgs1.Parameters));
var newToListSql = getExp(newToListArgs0);
return newToListSql;
}
break;
}
}
else

18
Providers/FreeSql.Provider.Odbc/SqlServer/OdbcSqlServerExpression.cs
View File

@ -284,6 +284,24 @@ namespace FreeSql.Odbc.SqlServer
return $"'+{_common.IsNull($"cast({ExpressionLambdaToSql(a, tsc)} as nvarchar(max))", "''")}+{nchar}'";
}).ToArray();
return string.Format(expArgs0, 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(string).GetMethod("Concat", new[] { typeof(object), typeof(object) }),
Expression.Convert(exp.Arguments[0], typeof(object)),
Expression.Convert(toListArgs1.Body, typeof(object))),
toListArgs1.Parameters));
var newToListSql = getExp(newToListArgs0);
if (string.IsNullOrEmpty(newToListSql) == false && newToListSql.StartsWith("(") && newToListSql.EndsWith(")"))
{
newToListSql = $"stuff({newToListSql.Substring(0, newToListSql.Length - 1)} FOR XML PATH('')),1,len({getExp(exp.Arguments[0])}),'')";
return newToListSql;
}
}
break;
}
}
else