Allow order by to define a list of expressions to order by
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@ -131,6 +131,7 @@ int yyerror(YYLTYPE* llocp, SQLParserResult** result, yyscan_t scanner, const ch
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std::vector<hsql::ColumnDefinition*>* column_vec;
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std::vector<hsql::UpdateClause*>* update_vec;
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std::vector<hsql::Expr*>* expr_vec;
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std::vector<hsql::OrderDescription*>* order_vec;
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}
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@ -146,7 +147,7 @@ int yyerror(YYLTYPE* llocp, SQLParserResult** result, yyscan_t scanner, const ch
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}
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}
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delete ($$);
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} <str_vec> <table_vec> <column_vec> <update_vec> <expr_vec>
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} <str_vec> <table_vec> <column_vec> <update_vec> <expr_vec> <order_vec>
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%destructor { delete ($$); } <*>
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@ -197,8 +198,8 @@ int yyerror(YYLTYPE* llocp, SQLParserResult** result, yyscan_t scanner, const ch
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%type <expr> expr scalar_expr unary_expr binary_expr function_expr star_expr expr_alias placeholder_expr
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%type <expr> column_name literal int_literal num_literal string_literal
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%type <expr> comp_expr opt_where join_condition opt_having
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%type <order> opt_order
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%type <limit> opt_limit
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%type <limit> opt_limit opt_top
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%type <order> order_desc
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%type <order_type> opt_order_type
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%type <column_t> column_def
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%type <update_t> update_clause
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@ -207,6 +208,7 @@ int yyerror(YYLTYPE* llocp, SQLParserResult** result, yyscan_t scanner, const ch
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%type <str_vec> ident_commalist opt_column_list
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%type <expr_vec> expr_list select_list literal_list
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%type <table_vec> table_ref_commalist
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%type <order_vec> opt_order order_list
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%type <update_vec> update_clause_commalist
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%type <column_vec> column_def_commalist
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@ -502,13 +504,14 @@ set_operator:
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;
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select_clause:
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SELECT opt_distinct select_list from_clause opt_where opt_group {
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SELECT opt_top opt_distinct select_list from_clause opt_where opt_group {
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$$ = new SelectStatement();
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$$->selectDistinct = $2;
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$$->selectList = $3;
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$$->fromTable = $4;
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$$->whereClause = $5;
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$$->groupBy = $6;
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$$->limit = $2;
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$$->selectDistinct = $3;
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$$->selectList = $4;
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$$->fromTable = $5;
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$$->whereClause = $6;
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$$->groupBy = $7;
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}
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;
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@ -521,7 +524,6 @@ select_list:
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expr_list
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;
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from_clause:
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FROM table_ref { $$ = $2; }
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;
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@ -546,16 +548,31 @@ opt_having:
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| /* empty */ { $$ = NULL; }
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opt_order:
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ORDER BY expr opt_order_type { $$ = new OrderDescription($4, $3); }
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ORDER BY order_list { $$ = $3; }
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| /* empty */ { $$ = NULL; }
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;
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order_list:
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order_desc { $$ = new std::vector<OrderDescription*>(); $$->push_back($1); }
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| order_list ',' order_desc { $1->push_back($3); $$ = $1; }
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;
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order_desc:
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expr opt_order_type { $$ = new OrderDescription($2, $1); }
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;
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opt_order_type:
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ASC { $$ = kOrderAsc; }
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| DESC { $$ = kOrderDesc; }
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| /* empty */ { $$ = kOrderAsc; }
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;
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// TODO: TOP and LIMIT can take more than just int literals.
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opt_top:
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TOP int_literal { $$ = new LimitDescription($2->ival, kNoOffset); delete $2; }
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| /* empty */ { $$ = NULL; }
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;
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opt_limit:
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LIMIT int_literal { $$ = new LimitDescription($2->ival, kNoOffset); delete $2; }
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@ -63,7 +63,7 @@ namespace hsql {
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GroupByDescription* groupBy;
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SelectStatement* unionSelect;
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OrderDescription* order;
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std::vector<OrderDescription*>* order;
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LimitDescription* limit;
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};
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@ -139,8 +139,8 @@ namespace hsql {
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if (stmt->order != NULL) {
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inprint("OrderBy:", numIndent + 1);
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printExpression(stmt->order->expr, numIndent + 2);
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if (stmt->order->type == kOrderAsc) inprint("ascending", numIndent + 2);
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printExpression(stmt->order->at(0)->expr, numIndent + 2);
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if (stmt->order->at(0)->type == kOrderAsc) inprint("ascending", numIndent + 2);
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else inprint("descending", numIndent + 2);
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}
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@ -73,3 +73,23 @@ TEST(SelectGroupDistinctTest) {
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}
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TEST(OrderByTest) {
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TEST_PARSE_SINGLE_SQL(
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"SELECT grade, city FROM students ORDER BY grade, city DESC;",
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kStmtSelect,
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SelectStatement,
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result,
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stmt);
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ASSERT_NULL(stmt->whereClause);
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ASSERT_NOTNULL(stmt->order);
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ASSERT_EQ(stmt->order->size(), 2);
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ASSERT_EQ(stmt->order->at(0)->type, kOrderAsc);
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ASSERT_STREQ(stmt->order->at(0)->expr->name, "grade");
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ASSERT_EQ(stmt->order->at(1)->type, kOrderDesc);
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ASSERT_STREQ(stmt->order->at(1)->expr->name, "city");
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delete result;
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}
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@ -8,6 +8,7 @@ SELECT * FROM "table" LIMIT 10 OFFSET 10; SELECT * FROM second;
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SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY col1;
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SELECT * FROM (SELECT * FROM t1);
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SELECT * FROM t1 UNION (SELECT * FROM t2 UNION SELECT * FROM t3) ORDER BY col1;
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SELECT TOP 10 * FROM t1 ORDER BY col1, col2;
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# JOIN
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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
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SELECT * FROM t1 JOIN t2 ON c1 = c2;
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