fix: update schema and table names for mssql metadata extraction

scripts/mssql-info-test/main.go

@@ -27,8 +27,8 @@ func main() {
 		log.Fatal("Couldn't ping mssql db", err)
 	}
 
-	schema := "test"
-	table := "migration_test"
+	schema := "Cartografia"
+	table := "MANZANA"
 
 	columns, err := getTableMetadata(db, schema, table)
 	if err != nil {
@@ -58,15 +58,15 @@ func getTableMetadata(db *sql.DB, schema, table string) ([]ColumnInfo, error) {
 SELECT 
 	c.name AS column_name,
 	t.name AS user_type_name,
-	bt.name AS system_type_name,
-	c.max_length,
-	c.precision,
-	c.scale,
-	c.is_nullable,
-	c.is_identity
+	CASE WHEN t.is_user_defined = 0 THEN t.name ELSE bt.name END AS system_type_name,
+	c.max_length AS max_length,
+	c.precision AS precision,
+	c.scale AS scale,
+	c.is_nullable AS is_nullable,
+	c.is_identity AS is_identity
 FROM sys.columns c
 JOIN sys.types t ON c.user_type_id = t.user_type_id
-JOIN sys.types bt ON c.system_type_id = bt.system_type_id AND bt.user_type_id = bt.system_type_id
+LEFT JOIN sys.types bt ON t.is_user_defined = 1 AND bt.user_type_id = t.system_type_id
 JOIN sys.tables st ON c.object_id = st.object_id
 JOIN sys.schemas s ON st.schema_id = s.schema_id
 WHERE s.name = @schema AND st.name = @table