usql update

usql/lexer.cpp

@@ -162,6 +162,9 @@ namespace usql {
 	    if (token == "create")
 		    return TokenType::keyword_create;
 
+	    if (token == "drop")
+		    return TokenType::keyword_drop;
+
 	    if (token == "where")
 		    return TokenType::keyword_where;
 
@@ -338,6 +341,9 @@ namespace usql {
 		    case TokenType::keyword_create:
 			    txt = "create";
 			    break;
+		    case TokenType::keyword_drop:
+			    txt = "drop";
+			    break;
 		    case TokenType::keyword_where:
 			    txt = "where";
 			    break;