cater for sqlserver and oracle being defined in connection string (both will be ODBC driver)

Author: SingingBush

README.md

@@ -3,7 +3,7 @@ DDBC
 
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@@ -148,9 +148,23 @@ ddbc:postgresql://127.0.0.1:5432
 ### Microsoft SQL Server (via ODBC)
 
 ```
+ddbc:sqlserver://localhost,1433?user=sa,password=bbk4k77JKH88g54,driver=FreeTDS
+
+or
+
 ddbc:odbc://localhost,1433?user=sa,password=bbk4k77JKH88g54,driver=FreeTDS
 ```
 
+### Oracle (via ODBC) **experimental**
+
+```
+ddbc:oracle://localhost:1521?user=sa,password=bbk4k77JKH88g54,driver=FreeTDS
+
+or
+
+ddbc:odbc://localhost:1521?user=sa,password=bbk4k77JKH88g54,driver=FreeTDS
+```
+
 ### DSN connections for Microsoft SQL Server
 The correct format to use for a dsn connection string is `odbc://?dsn=<DSN name>`.
 Note that the server portion before the `?` is empty, so the default server for

source/ddbc/common.d

@@ -552,9 +552,9 @@ string extractDriverNameFromURL(string url) {
     url = stripDdbcPrefix(url);
     import std.string;
     int colonPos = cast(int)url.indexOf(":");
-    if (colonPos < 0)
-        return url;
-    return url[0 .. colonPos];
+    
+	string dbName = colonPos < 0 ? url : url[0 .. colonPos];
+	return dbName == "sqlserver" || dbName == "oracle" ? "odbc" : dbName;
 }
 
 /// extract parameters from URL string to string[string] map, update url to strip params

source/ddbc/core.d

@@ -411,7 +411,7 @@ string makeDDBCUrl(string driverName, string[string] params) {
 string makeDDBCUrl(string driverName, string host = null, int port = 0, 
 							string dbName = null, string[string] params = null) {
 	import std.algorithm.searching : canFind;
-	enforce(canFind(["sqlite", "postgresql", "mysql", "odbc"], driverName), "driver must be one of sqlite|postgresql|mysql|odbc");
+	enforce(canFind(["sqlite", "postgresql", "mysql", "sqlserver", "oracle", "odbc"], driverName), "driver must be one of sqlite|postgresql|mysql|sqlserver|oracle|odbc");
     import std.conv : to;
     char[] res;
     res.assumeSafeAppend;
@@ -462,6 +462,21 @@ private unittest {
 	assert(url == "ddbc:mysql://127.0.0.1:3306/mydb", "MySQL URL is not correct: "~url);
 }
 
+private unittest {
+	string url = makeDDBCUrl("sqlserver", "127.0.0.1", 1433, "mydb");
+	assert(url == "ddbc:sqlserver://127.0.0.1:1433/mydb", "SQL Server URL is not correct: "~url);
+}
+
+private unittest {
+	string url = makeDDBCUrl("oracle", "127.0.0.1", 1521, "mydb");
+	assert(url == "ddbc:oracle://127.0.0.1:1521/mydb", "Oracle URL is not correct: "~url);
+}
+
+private unittest {
+	string url = makeDDBCUrl("odbc", "127.0.0.1", 3306, "mydb");
+	assert(url == "ddbc:odbc://127.0.0.1:3306/mydb", "ODBC URL is not correct: "~url);
+}
+
 private unittest {
 	string[string] params;
 	params["user"] = "sa";