created join table instead of join statement. this is what sql actually defines

src/Makefile

@@ -37,4 +37,5 @@ parser/bison_parser.cpp:
 
 clean:
 	rm -f *.o *~ bin/analysis $(TESTS_BIN) bin/grammar_test
+	rm -rf build/
 	make clean -C parser/

src/build_and_run_tests.sh

@@ -13,7 +13,8 @@ echo "\n\n"
 ./bin/grammar_test "SELECT a FROM foo WHERE a > 12 OR b > 3 AND c = 3 LIMIT 10"
 ./bin/grammar_test "SELECT col1, col2, 'test' FROM table, foo AS t WHERE age > 12 AND zipcode = 12345 GROUP BY col1;"
 ./bin/grammar_test "SELECT age FROM table AS t1, (SELECT * FROM table2) AS t2 ORDER BY age DESC"
-./bin/grammar_test "SELECT * from table WHERE (b OR NOT a) AND a = 12.5 AS t1 JOIN table2 ON a = b"
+./bin/grammar_test -f "SELECT * from table WHERE (b OR NOT a) AND a = 12.5 AS t1 JOIN table2 ON a = b"
+./bin/grammar_test "SELECT * from table JOIN table2 ON a = b WHERE (b OR NOT a) AND a = 12.5"
 
 ./bin/grammar_test "(SELECT a FROM foo WHERE a > 12 OR b > 3 AND c = 3 LIMIT 10)"
 
@@ -21,7 +22,8 @@ echo "\n\n"
 
 # ./bin/analysis "SELECT a FROM foo WHERE a > 12 OR b > 3 AND c = 3"
 ./bin/analysis "SELECT col1, col2, 'test' FROM table t1, foo WHERE age > 12 AND zipcode = 12345 GROUP BY col1 ORDER BY col2 DESC LIMIT 100;"
-./bin/analysis "SELECT * from table WHERE (b OR NOT a) AND a = 12.5 AS t1 JOIN table2 AS t2 ON t1.a = t2.b"
+./bin/analysis "SELECT * from table AS t1 JOIN table2 AS t2 ON t1.a = t2.b WHERE (b OR NOT a) AND a = 12.5"
+./bin/analysis "SELECT t1.a, t1.b, t2.c FROM table AS t1 JOIN (SELECT * FROM foo JOIN bar ON foo.id = bar.id) t2 ON t1.a = t2.b WHERE (t1.b OR NOT t1.a) AND t2.c = 12.5"
 # ./bin/analysis "SELECT * from table WHERE (b OR NOT a) AND a = 12.5 JOIN table2 ON a = b"
 
 echo "\n\n"

src/lib/Statement.h

@@ -14,7 +14,6 @@ namespace hsql {
 typedef enum {
 	kStmtError,
 	kStmtSelect,
-	kStmtJoin,
 	kStmtDelete,
 	kStmtInsert,
 	kStmtCreate
@@ -42,15 +41,6 @@ struct LimitDescription {
 };
 
 
-typedef enum {
-	kJoinInner,
-	kJoinOuter,
-	kJoinLeft,
-	kJoinRight
-} JoinType;
-
-
-
 
 struct Statement {
 	Statement(StatementType type) : type(type) {};
@@ -74,16 +64,6 @@ struct SelectStatement : Statement {
 };
 
 
-struct JoinStatement : Statement {
-	JoinStatement() : Statement(kStmtJoin) {};
-
-	TableRef* left;
-	TableRef* right;
-	JoinType join_type;
-	Expr* join_condition;
-};
-
-
 struct DeleteStatement : Statement {
 	// TODO
 };

src/lib/Table.h

@@ -5,7 +5,6 @@
 namespace hsql {
 
 class SelectStatement;
-class JoinStatement;
 
 /**
  * TableRef
@@ -18,6 +17,15 @@ typedef enum {
 	kTableCrossProduct
 } TableRefType;
 
+
+typedef enum {
+	kJoinInner,
+	kJoinOuter,
+	kJoinLeft,
+	kJoinRight
+} JoinType;
+
+
 typedef struct TableRef TableRef;
 
 struct TableRef {
@@ -27,9 +35,15 @@ struct TableRef {
 
 	char* name;
 	char* alias;
+
 	SelectStatement* select;
-	JoinStatement* join;
 	List<TableRef*>* list;
+
+	// Join memberbs
+	TableRef* left;
+	TableRef* right;
+	JoinType join_type;
+	Expr* join_condition;
 };
 
 

src/lib/sqlhelper.cpp

@@ -24,6 +24,15 @@ void printTableRefInfo(TableRef* table, uint num_indent) {
     case kTableSelect:
       printSelectStatementInfo(table->select, num_indent);
       break;
+    case kTableJoin:
+      inprint("Join Table", num_indent);
+      inprint("Left", num_indent+1);
+      printTableRefInfo(table->left, num_indent+2);
+      inprint("Right", num_indent+1);
+      printTableRefInfo(table->right, num_indent+2);
+      inprint("Join Condition", num_indent+1);
+      printExpression(table->join_condition, num_indent+2);
+      break;
     case kTableCrossProduct:
       for (TableRef* tbl : table->list->_vector) printTableRefInfo(tbl, num_indent);
       break;
@@ -88,16 +97,5 @@ void printSelectStatementInfo(SelectStatement* stmt, uint num_indent) {
   }
 }
 
-void printJoinStatementInfo(JoinStatement* stmt, uint num_indent) {
-  inprint("JoinStatement", num_indent);
-  inprint("JoinType:", num_indent+1);
-  inprintU(stmt->join_type, num_indent+2);
-  inprint("Left Table:", num_indent+1);
-  printTableRefInfo(stmt->left, num_indent+2);
-  inprint("Right Table:", num_indent+1);
-  printTableRefInfo(stmt->right, num_indent+2);
-  inprint("Join Condition:", num_indent+1);
-  printExpression(stmt->join_condition, num_indent+2);
-}
 
 } // namespace hsql

src/lib/sqlhelper.h

@@ -8,7 +8,6 @@
 namespace hsql {
 
 void printSelectStatementInfo(SelectStatement* stmt, uint num_indent);
-void printJoinStatementInfo(JoinStatement* stmt, uint num_indent);
 
 } // namespace hsql
 

src/parser/bison_parser.y

@@ -74,7 +74,6 @@ typedef void* yyscan_t;
 
 	hsql::Statement* statement;
 	hsql::SelectStatement* select_stmt;
-	hsql::JoinStatement* join_stmt;
 
 	hsql::TableRef* table;
 	hsql::Expr* expr;
@@ -106,10 +105,9 @@ typedef void* yyscan_t;
  *********************************/
 %type <statement> 	statement
 %type <select_stmt> select_statement
-%type <join_stmt>	join_statement
 %type <sval> 		table_name opt_alias alias
 %type <table> 		from_clause table_ref table_ref_atomic table_ref_name
-%type <table>		join_table
+%type <table>		join_stmt join_table
 %type <expr> 		expr scalar_expr unary_expr binary_expr function_expr star_expr
 %type <expr> 		column_name literal int_literal num_literal
 %type <expr> 		comp_expr where_clause join_condition
@@ -159,42 +157,11 @@ input:
 // Atm: only select statements (future: insert, delete, etc...)
 statement:
 		select_statement { $$ = $1; }
-	|	join_statement { $$ = $1; }
 	;
 
 
 
 
-/******************************
- ** Join Statements
- ******************************/
-
-join_statement:
-		join_table JOIN join_table ON join_condition
-		{ 
-			$$ = new JoinStatement();
-			$$->left = $1;
-			$$->right = $3;
-			$$->join_condition = $5;
-			$$->join_type = kJoinInner;
-		}
-		;
-
-
-join_table:
-		select_statement alias {
-			auto tbl = new TableRef(kTableSelect);
-			tbl->select = $1;
-			tbl->alias = $2;
-			$$ = tbl;
-		}
-	|	table_ref_name;
-
-
-join_condition:
-		expr
-		;
-
 
 /******************************
  ** Select Statements
@@ -349,6 +316,7 @@ table_ref_atomic:
 			tbl->alias = $4;
 			$$ = tbl;
 		}
+	|	join_stmt
 	;
 
 
@@ -382,6 +350,42 @@ opt_alias:
 		alias
 	|	/* empty */ { $$ = NULL; }
 
+
+/******************************
+ ** Join Statements
+ ******************************/
+
+join_stmt:
+		join_table JOIN join_table ON join_condition
+		{ 
+			$$ = new TableRef(kTableJoin);
+			$$->left = $1;
+			$$->right = $3;
+			$$->join_condition = $5;
+			$$->join_type = kJoinInner;
+		}
+		;
+
+
+join_table:
+		'(' select_statement ')' alias {
+			auto tbl = new TableRef(kTableSelect);
+			tbl->select = $2;
+			tbl->alias = $4;
+			$$ = tbl;
+		}
+	|	table_ref_name;
+
+
+join_condition:
+		expr
+		;
+
+
+/******************************
+ ** Misc
+ ******************************/
+
 opt_semicolon:
 		';'
 	|	/* empty */

src/sql_analysis.cpp

@@ -25,8 +25,6 @@ int main(int argc, char *argv[]) {
 
         if (stmt->type == kStmtSelect) {
         	printSelectStatementInfo((SelectStatement*) stmt, 0);
-        } else if (stmt->type == kStmtJoin) {
-            printJoinStatementInfo((JoinStatement*) stmt, 0);
         } else {
             if (stmt->type == kStmtError) {
                 fprintf(stderr, "%s!\n", stmt->parser_msg);