Implement BETWEEN operator

src/parser/bison_parser.y

@@ -195,7 +195,7 @@ int yyerror(YYLTYPE* llocp, SQLParserResult** result, yyscan_t scanner, const ch
 %type <uval>		import_file_type opt_join_type column_type
 %type <table> 		from_clause table_ref table_ref_atomic table_ref_name
 %type <table>		join_clause join_table table_ref_name_no_alias
-%type <expr> 		expr scalar_expr unary_expr binary_expr function_expr star_expr expr_alias placeholder_expr
+%type <expr> 		expr operand scalar_expr unary_expr binary_expr logic_expr function_expr between_expr star_expr expr_alias placeholder_expr
 %type <expr> 		column_name literal int_literal num_literal string_literal
 %type <expr> 		comp_expr opt_where join_condition opt_having
 %type <limit>		opt_limit opt_top
@@ -601,6 +601,12 @@ expr_alias:
 	;
 
 expr:
+		operand
+	|	between_expr
+	|	logic_expr
+	;
+
+operand:
 		'(' expr ')' { $$ = $2; }
 	|	scalar_expr
 	|	unary_expr
@@ -615,38 +621,44 @@ scalar_expr:
 	;
 
 unary_expr:
-		'-' expr { $$ = Expr::makeOpUnary(Expr::UMINUS, $2); }
+		'-' operand { $$ = Expr::makeOpUnary(Expr::UMINUS, $2); }
-	|	NOT expr { $$ = Expr::makeOpUnary(Expr::NOT, $2); }
+	|	NOT operand { $$ = Expr::makeOpUnary(Expr::NOT, $2); }
 	;
 
 binary_expr:
 		comp_expr
-	|	expr '-' expr	{ $$ = Expr::makeOpBinary($1, '-', $3); }
+	|	operand '-' operand	{ $$ = Expr::makeOpBinary($1, '-', $3); }
-	|	expr '+' expr	{ $$ = Expr::makeOpBinary($1, '+', $3); }
+	|	operand '+' operand	{ $$ = Expr::makeOpBinary($1, '+', $3); }
-	|	expr '/' expr	{ $$ = Expr::makeOpBinary($1, '/', $3); }
+	|	operand '/' operand	{ $$ = Expr::makeOpBinary($1, '/', $3); }
-	|	expr '*' expr	{ $$ = Expr::makeOpBinary($1, '*', $3); }
+	|	operand '*' operand	{ $$ = Expr::makeOpBinary($1, '*', $3); }
-	|	expr '%' expr	{ $$ = Expr::makeOpBinary($1, '%', $3); }
+	|	operand '%' operand	{ $$ = Expr::makeOpBinary($1, '%', $3); }
-	|	expr '^' expr	{ $$ = Expr::makeOpBinary($1, '^', $3); }
+	|	operand '^' operand	{ $$ = Expr::makeOpBinary($1, '^', $3); }
-	|	expr AND expr	{ $$ = Expr::makeOpBinary($1, Expr::AND, $3); }
+	|	operand LIKE operand	{ $$ = Expr::makeOpBinary($1, Expr::LIKE, $3); }
-	|	expr OR expr	{ $$ = Expr::makeOpBinary($1, Expr::OR, $3); }
+	|	operand NOT LIKE operand	{ $$ = Expr::makeOpBinary($1, Expr::NOT_LIKE, $4); }
-	|	expr LIKE expr	{ $$ = Expr::makeOpBinary($1, Expr::LIKE, $3); }
-	|	expr NOT LIKE expr	{ $$ = Expr::makeOpBinary($1, Expr::NOT_LIKE, $4); }
 	;
 
+logic_expr:
+		expr AND expr	{ $$ = Expr::makeOpBinary($1, Expr::AND, $3); }
+	|	expr OR expr	{ $$ = Expr::makeOpBinary($1, Expr::OR, $3); }
+	;
 
 comp_expr:
-		expr '=' expr		{ $$ = Expr::makeOpBinary($1, '=', $3); }
+		operand '=' operand		{ $$ = Expr::makeOpBinary($1, '=', $3); }
-	|	expr NOTEQUALS expr	{ $$ = Expr::makeOpBinary($1, Expr::NOT_EQUALS, $3); }
+	|	operand NOTEQUALS operand	{ $$ = Expr::makeOpBinary($1, Expr::NOT_EQUALS, $3); }
-	|	expr '<' expr		{ $$ = Expr::makeOpBinary($1, '<', $3); }
+	|	operand '<' operand		{ $$ = Expr::makeOpBinary($1, '<', $3); }
-	|	expr '>' expr		{ $$ = Expr::makeOpBinary($1, '>', $3); }
+	|	operand '>' operand		{ $$ = Expr::makeOpBinary($1, '>', $3); }
-	|	expr LESSEQ expr	{ $$ = Expr::makeOpBinary($1, Expr::LESS_EQ, $3); }
+	|	operand LESSEQ operand	{ $$ = Expr::makeOpBinary($1, Expr::LESS_EQ, $3); }
-	|	expr GREATEREQ expr	{ $$ = Expr::makeOpBinary($1, Expr::GREATER_EQ, $3); }
+	|	operand GREATEREQ operand	{ $$ = Expr::makeOpBinary($1, Expr::GREATER_EQ, $3); }
 	;
 
 function_expr:
 		IDENTIFIER '(' opt_distinct expr_list ')' { $$ = Expr::makeFunctionRef($1, $4, $3); }
 	;
 
+between_expr:
+		operand BETWEEN operand AND operand { $$ = Expr::makeBetween($1, $3, $5); }
+	;
+
 column_name:
 		IDENTIFIER { $$ = Expr::makeColumnRef($1); }
 	|	IDENTIFIER '.' IDENTIFIER { $$ = Expr::makeColumnRef($1, $3); }

src/sql/Expr.cpp

@@ -47,6 +47,15 @@ namespace hsql {
     return e;
   }
 
+  Expr* Expr::makeBetween(Expr* expr, Expr* left, Expr* right) {
+    Expr* e = new Expr(kExprOperator);
+    e->expr = expr;
+    e->exprList = new std::vector<Expr*>();
+    e->exprList->push_back(left);
+    e->exprList->push_back(right);
+    return e;
+  }
+
   Expr* Expr::makeLiteral(int64_t val) {
     Expr* e = new Expr(kExprLiteralInt);
     e->ival = val;

src/sql/Expr.h

@@ -32,9 +32,11 @@ namespace hsql {
     // + - * / < > = %
     // Non-trivial are: <> <= >= LIKE ISNULL NOT
     enum OperatorType {
-      SIMPLE_OP,
+      // Ternary operators
+      BETWEEN,
 
       // Binary operators.
+      SIMPLE_OP,
       NOT_EQUALS,
       LESS_EQ,
       GREATER_EQ,
@@ -60,6 +62,7 @@ namespace hsql {
 
     ExprType type;
 
+    // TODO: Replace expressions by list.
     Expr* expr;
     Expr* expr2;
     std::vector<Expr*>* exprList;
@@ -99,6 +102,8 @@ namespace hsql {
 
     static Expr* makeOpBinary(Expr* expr1, OperatorType op, Expr* expr2);
 
+    static Expr* makeBetween(Expr* expr, Expr* left, Expr* right);
+
     static Expr* makeLiteral(int64_t val);
 
     static Expr* makeLiteral(double val);

test/select_tests.cpp

@@ -111,7 +111,6 @@ TEST(SelectGroupDistinctTest) {
   delete result;
 }
 
-
 TEST(OrderByTest) {
   TEST_PARSE_SINGLE_SQL(
     "SELECT grade, city FROM students ORDER BY grade, city DESC;",
@@ -132,3 +131,29 @@ TEST(OrderByTest) {
 
   delete result;
 }
+
+TEST(SelectBetweenTest) {
+  TEST_PARSE_SINGLE_SQL(
+    "SELECT grade, city FROM students WHERE grade BETWEEN 1 and c;",
+    kStmtSelect,
+    SelectStatement,
+    result,
+    stmt);
+
+
+  Expr* where = stmt->whereClause;
+  ASSERT_NOTNULL(where);
+  ASSERT(where->isType(kExprOperator));
+  ASSERT_EQ(where->opType, Expr::BETWEEN);
+
+  ASSERT_STREQ(where->expr->getName(), "grade");
+  ASSERT(where->expr->isType(kExprColumnRef));
+
+  ASSERT_EQ(where->exprList->size(), 2);
+  ASSERT(where->exprList->at(0)->isType(kExprLiteralInt));
+  ASSERT_EQ(where->exprList->at(0)->ival, 1);
+  ASSERT(where->exprList->at(1)->isType(kExprColumnRef));
+  ASSERT_STREQ(where->exprList->at(1)->getName(), "c");
+
+  delete result;
+}

test/valid_queries.sql

@@ -10,6 +10,7 @@ SELECT * FROM (SELECT * FROM t1);
 SELECT * FROM t1 UNION (SELECT * FROM t2 UNION SELECT * FROM t3) ORDER BY col1;
 SELECT TOP 10 * FROM t1 ORDER BY col1, col2;
 SELECT a, MAX(b), MAX(c, d), CUSTOM(q, UP(r)) AS f FROM t1;
+SELECT * FROM t WHERE a BETWEEN 1 and c;
 # JOIN
 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
 SELECT * FROM t1 JOIN t2 ON c1 = c2;