Merge pull request #34 from torpedro/misc

Interface Improvements

benchmark/Makefile

@@ -1,4 +1,7 @@
 
+SRC = ./
+CPP  = $(shell find $(SRC) -name '*.cpp')
+
 CFLAGS = -std=c++11 -lstdc++ -Wall -I../src/ -L../
 
 all: parser_benchmark
@@ -6,8 +9,8 @@ all: parser_benchmark
 run: parser_benchmark
 	@export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:../ && ./parser_benchmark
 
-parser_benchmark: parser_benchmark.cpp
+parser_benchmark: $(CPP)
-	$(CXX) $(CFLAGS) parser_benchmark.cpp -o parser_benchmark -lbenchmark -lpthread -lsqlparser
+	$(CXX) $(CFLAGS) $(CPP) -o parser_benchmark -lbenchmark -lpthread -lsqlparser
 
 clean:
 	rm -f parser_benchmark

benchmark/parser_benchmark.cpp

@@ -31,6 +31,18 @@ PARSE_QUERY_BENCHMARK(BM_LongSelectElement26,
 PARSE_QUERY_BENCHMARK(BM_LongSelectElement52,
   "SELECT aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa FROM test;");
 
+// Prepare and Execute benchmarks.
+PARSE_QUERY_BENCHMARK(BM_ExecuteStatement,
+  "EXECUTE procedure;");
+
+PARSE_QUERY_BENCHMARK(BM_ExecuteWith2ParametersStatement,
+  "EXECUTE procedure(11, 'test');");
+
+PARSE_QUERY_BENCHMARK(BM_ExecuteWith10ParametersStatement,
+  "EXECUTE procedure(11, 'test', 5.6, 4.2, 'abc', 6, 7, 8, 9, 10000);");
+
+
+
 // Benchmark the influence of increasing size of the query, while
 // the number of tokens remains unchanged.
 static void BM_CharacterCount(benchmark::State& st) {

example/example.cpp

@@ -6,7 +6,7 @@
 #include "SQLParser.h"
 
 // contains printing utilities
-#include "sqlhelper.h"
+#include "util/sqlhelper.h"
 
 int main(int argc, char *argv[]) {
     if (argc <= 1) {
@@ -16,31 +16,26 @@ int main(int argc, char *argv[]) {
     std::string query = argv[1];
 
     // parse a given query
-    hsql::SQLParserResult* result = hsql::SQLParser::parseSQLString(query);
+    hsql::SQLParserResult result;
+    hsql::SQLParser::parseSQLString(query, &result);
 
     // check whether the parsing was successful
-    if (!result) {
-        return -1;
-    }
 
-    if (result->isValid()) {
+    if (result.isValid()) {
         printf("Parsed successfully!\n");
-        printf("Number of statements: %lu\n", result->size());
+        printf("Number of statements: %lu\n", result.size());
 
-        for (uint i = 0; i < result->size(); ++i) {
+        for (uint i = 0; i < result.size(); ++i) {
             // Print a statement summary.
-            hsql::printStatementInfo(result->getStatement(i));
+            hsql::printStatementInfo(result.getStatement(i));
         }
-
-        delete result;
         return 0;
     } else {
         fprintf(stderr, "Given string is not a valid SQL query.\n");
         fprintf(stderr, "%s (L%d:%d)\n", 
-                result->errorMsg(),
+                result.errorMsg(),
-                result->errorLine(),
+                result.errorLine(),
-                result->errorColumn());
+                result.errorColumn());
-        delete result;
         return -1;
     }
 }

src/SQLParser.cpp

@@ -12,36 +12,51 @@ namespace hsql {
     fprintf(stderr, "SQLParser only has static methods atm! Do not initialize!\n");
   }
 
-  SQLParserResult* SQLParser::parseSQLString(const char* text) {
+  // static
-    SQLParserResult* result = NULL;
+  bool SQLParser::parseSQLString(const char* text, SQLParserResult* result) {
     yyscan_t scanner;
     YY_BUFFER_STATE state;
 
     if (hsql_lex_init(&scanner)) {
       // Couldn't initialize the lexer.
       fprintf(stderr, "[Error] SQLParser: Error when initializing lexer!\n");
-      return NULL;
+      return false;
     }
 
     state = hsql__scan_string(text, scanner);
 
-    // Parser and return early if it failed.
+    // Parse the tokens.
-    if (hsql_parse(&result, scanner)) {
+    // If parsing fails, the result will contain an error object.
-      // Returns an error stmt object.
+    int ret = hsql_parse(result, scanner);
-      hsql__delete_buffer(state, scanner);
+    bool success = (ret == 0);
-      hsql_lex_destroy(scanner);
+    result->setIsValid(success);
-      return result;
-    }
 
     hsql__delete_buffer(state, scanner);
     hsql_lex_destroy(scanner);
+
+    return true;
+  }
+
+  // static
+  bool SQLParser::parseSQLString(const std::string& text, SQLParserResult* result) {
+    return parseSQLString(text.c_str(), result);
+  }
+
+  // static
+  SQLParserResult* SQLParser::parseSQLString(const char* text) {
+    SQLParserResult* result = new SQLParserResult();
+
+    if (!SQLParser::parseSQLString(text, result)) {
+      delete result;
+      return NULL;
+    }
+
     return result;
   }
 
-
+  // static
   SQLParserResult* SQLParser::parseSQLString(const std::string& text) {
     return parseSQLString(text.c_str());
   }
 
-
 } // namespace hsql

src/SQLParser.h

@@ -1,5 +1,5 @@
-#ifndef __SQLPARSER_H_
+#ifndef __SQLPARSER__SQLPARSER_H__
-#define __SQLPARSER_H_
+#define __SQLPARSER__SQLPARSER_H__
 
 #include "SQLParserResult.h"
 #include "sql/statements.h"
@@ -9,10 +9,25 @@ namespace hsql {
   // Static methods used to parse SQL strings.
   class SQLParser {
    public:
+    // Parses a given constant character SQL string into the result object.
+    // Returns true if the lexer and parser could run without internal errors.
+    // This does NOT mean that the SQL string was valid SQL. To check that
+    // you need to check result->isValid();
+    static bool parseSQLString(const char* sql, SQLParserResult* result);
+
+    // Parses a given SQL string into the result object.
+    static bool parseSQLString(const std::string& sql, SQLParserResult* result);
+
+    // Deprecated:
     // Parses a given constant character SQL string.
+    // Note: This is kept for legacy reasons. It is recommended to use
+    //       the (const char*, SQLParserResult*) implementation.
     static SQLParserResult* parseSQLString(const char* sql);
 
+    // Deprecated:
     // Parses an SQL std::string.
+    // Note: This is kept for legacy reasons. It is recommended to use
+    //       the (const std::string&, SQLParserResult*) implementation.
     static SQLParserResult* parseSQLString(const std::string& sql);
 
    private:

src/SQLParserResult.cpp

@@ -4,21 +4,17 @@
 namespace hsql {
 
   SQLParserResult::SQLParserResult() :
-    isValid_(true),
+    isValid_(false),
     errorMsg_(NULL) {};
 
   SQLParserResult::SQLParserResult(SQLStatement* stmt) :
-    isValid_(true),
+    isValid_(false),
     errorMsg_(NULL) {
     addStatement(stmt);
   };
 
   SQLParserResult::~SQLParserResult() {
-    for (SQLStatement* statement : statements_) {
+    reset();
-      delete statement;
-    }
-
-    free(errorMsg_);
   }
 
   void SQLParserResult::addStatement(SQLStatement* stmt) {
@@ -63,4 +59,30 @@ namespace hsql {
     errorColumn_ = errorColumn;
   }
 
+  const std::vector<SQLStatement*>& SQLParserResult::getStatements() const {
+    return statements_;
+  }
+
+  std::vector<SQLStatement*> SQLParserResult::releaseStatements() {
+    std::vector<SQLStatement*> copy = statements_;
+
+    statements_.clear();
+
+    return copy;
+  }
+
+  void SQLParserResult::reset() {
+    for (SQLStatement* statement : statements_) {
+      delete statement;
+    }
+    statements_.clear();
+
+    isValid_ = false;
+
+    free(errorMsg_);
+    errorMsg_ = NULL;
+    errorLine_ = -1;
+    errorColumn_ = -1;
+  }
+
 } // namespace hsql

src/SQLParserResult.h

@@ -1,5 +1,5 @@
-#ifndef __SQLPARSERRESULT__
+#ifndef __SQLPARSER__SQLPARSER_RESULT_H__
-#define __SQLPARSERRESULT__
+#define __SQLPARSER__SQLPARSER_RESULT_H__
 
 #include "sql/SQLStatement.h"
 
@@ -15,15 +15,22 @@ namespace hsql {
     // Takes ownership of the statement.
     SQLParserResult(SQLStatement* stmt);
 
-    // Deletes all statements in the resul.
+    // Deletes all statements in the result.
     virtual ~SQLParserResult();
 
+    // Set whether parsing was successful.
+    void setIsValid(bool isValid);
+
     // Returns true if parsing was successful.
     bool isValid() const;
 
     // Returns the number of statements in the result.
     size_t size() const;
 
+    // Set the details of the error, if available.
+    // Takes ownership of errorMsg.
+    void setErrorDetails(char* errorMsg, int errorLine, int errorColumn);
+
     // Returns the error message, if an error occurred.
     const char* errorMsg() const;
 
@@ -33,23 +40,25 @@ namespace hsql {
     // Returns the column number of the occurrance of the error in the query.
     int errorColumn() const;
 
+    // Adds a statement to the result list of statements.
+    // SQLParserResult takes ownership of the statement.
+    void addStatement(SQLStatement* stmt);
+
     // Gets the SQL statement with the given index.
     const SQLStatement* getStatement(int index) const;
 
     // Gets the non const SQL statement with the given index.
     SQLStatement* getMutableStatement(int index);
 
-    // Adds a statement to the result list of statements.
+    // Get the list of all statements.
-    // Takes ownership of the statement.
+    const std::vector<SQLStatement*>& getStatements() const;
-    void addStatement(SQLStatement* stmt);
 
-    // Set whether parsing was successful.
+    // Returns a copy of the list of all statements in this result.
-    void setIsValid(bool isValid);
+    // Removes them from this result.
-
+    std::vector<SQLStatement*> releaseStatements();
-    // Set the details of the error, if available.
-    // Takes ownership of errorMsg.
-    void setErrorDetails(char* errorMsg, int errorLine, int errorColumn);
 
+    // Deletes all statements and other data within the result.
+    void reset();
 
    private:
     // List of statements within the result.
@@ -70,4 +79,4 @@ namespace hsql {
 
 } // namespace hsql
 
-#endif // __SQLPARSERRESULT__
+#endif // __SQLPARSER__SQLPARSER_RESULT_H__

src/parser/bison_parser.h

@@ -48,7 +48,7 @@
 extern int hsql_debug;
 #endif
 /* "%code requires" blocks.  */
-#line 41 "bison_parser.y" /* yacc.c:1909  */
+#line 36 "bison_parser.y" /* yacc.c:1909  */
 
 // %code requires block	
 
@@ -214,7 +214,7 @@ extern int hsql_debug;
 
 union HSQL_STYPE
 {
-#line 100 "bison_parser.y" /* yacc.c:1909  */
+#line 95 "bison_parser.y" /* yacc.c:1909  */
 
 	double fval;
 	int64_t ival;
@@ -242,7 +242,7 @@ union HSQL_STYPE
 	hsql::GroupByDescription* group_t;
 	hsql::UpdateClause* update_t;
 
-	hsql::SQLParserResult* stmt_list;
+	std::vector<hsql::SQLStatement*>* stmt_vec;
 
 	std::vector<char*>* str_vec;
 	std::vector<hsql::TableRef*>* table_vec;
@@ -275,6 +275,6 @@ struct HSQL_LTYPE
 
 
 
-int hsql_parse (hsql::SQLParserResult** result, yyscan_t scanner);
+int hsql_parse (hsql::SQLParserResult* result, yyscan_t scanner);
 
 #endif /* !YY_HSQL_BISON_PARSER_H_INCLUDED  */

src/parser/bison_parser.y

@@ -18,14 +18,9 @@
 
 using namespace hsql;
 
-int yyerror(YYLTYPE* llocp, SQLParserResult** result, yyscan_t scanner, const char *msg) {
+int yyerror(YYLTYPE* llocp, SQLParserResult* result, yyscan_t scanner, const char *msg) {
-	delete *result;
+	result->setIsValid(false);
-
+	result->setErrorDetails(strdup(msg), llocp->first_line, llocp->first_column);
-	SQLParserResult* list = new SQLParserResult();
-	list->setIsValid(false);
-	list->setErrorDetails(strdup(msg), llocp->first_line, llocp->first_column);
-
-	*result = list;
 	return 0;
 }
 
@@ -90,7 +85,7 @@ int yyerror(YYLTYPE* llocp, SQLParserResult** result, yyscan_t scanner, const ch
 %lex-param   { yyscan_t scanner }
 
 // Define additional parameters for yyparse
-%parse-param { hsql::SQLParserResult** result }
+%parse-param { hsql::SQLParserResult* result }
 %parse-param { yyscan_t scanner }
 
 
@@ -124,7 +119,7 @@ int yyerror(YYLTYPE* llocp, SQLParserResult** result, yyscan_t scanner, const ch
 	hsql::GroupByDescription* group_t;
 	hsql::UpdateClause* update_t;
 
-	hsql::SQLParserResult* stmt_list;
+	std::vector<hsql::SQLStatement*>* stmt_vec;
 
 	std::vector<char*>* str_vec;
 	std::vector<hsql::TableRef*>* table_vec;
@@ -147,7 +142,7 @@ int yyerror(YYLTYPE* llocp, SQLParserResult** result, yyscan_t scanner, const ch
 		}
 	}
 	delete ($$);
-} <str_vec> <table_vec> <column_vec> <update_vec> <expr_vec> <order_vec>
+} <str_vec> <table_vec> <column_vec> <update_vec> <expr_vec> <order_vec> <stmt_vec>
 %destructor { delete ($$); } <*>
 
 
@@ -178,7 +173,7 @@ int yyerror(YYLTYPE* llocp, SQLParserResult** result, yyscan_t scanner, const ch
 /*********************************
  ** Non-Terminal types (http://www.gnu.org/software/bison/manual/html_node/Type-Decl.html)
  *********************************/
-%type <stmt_list>	statement_list
+%type <stmt_vec>	statement_list
 %type <statement> 	statement preparable_statement
 %type <exec_stmt>	execute_statement
 %type <prep_stmt>	prepare_statement
@@ -243,14 +238,18 @@ int yyerror(YYLTYPE* llocp, SQLParserResult** result, yyscan_t scanner, const ch
 // Defines our general input.
 input:
 		statement_list opt_semicolon {
-			*result = $1;
+		  for (SQLStatement* stmt : *$1) {
+		    // Transfers ownership of the statement.
+		  	result->addStatement(stmt);
+		  }
+		  delete $1;
 		}
 	;
 
 
 statement_list:
-		statement { $$ = new SQLParserResult($1); }
+		statement { $$ = new std::vector<SQLStatement*>(); $$->push_back($1); }
-	|	statement_list ';' statement { $1->addStatement($3); $$ = $1; }
+	|	statement_list ';' statement { $1->push_back($3); $$ = $1; }
 	;
 
 statement:
@@ -288,7 +287,11 @@ prepare_statement:
 	|	PREPARE IDENTIFIER '{' statement_list opt_semicolon '}' {
 			$$ = new PrepareStatement();
 			$$->name = $2;
-			$$->query = $4;
+			$$->query = new SQLParserResult();
+		  for (SQLStatement* stmt : *$4) {
+		  	$$->query->addStatement(stmt);
+		  }
+		  delete $4;
 		}
 	;
 
@@ -651,8 +654,8 @@ scalar_expr:
 	;
 
 unary_expr:
-		'-' operand { $$ = Expr::makeOpUnary(Expr::UMINUS, $2); }
+		'-' operand { $$ = Expr::makeOpUnary(kOpMinus, $2); }
-	|	NOT operand { $$ = Expr::makeOpUnary(Expr::NOT, $2); }
+	|	NOT operand { $$ = Expr::makeOpUnary(kOpNot, $2); }
 	;
 
 binary_expr:
@@ -663,20 +666,20 @@ binary_expr:
 	|	operand '*' operand			{ $$ = Expr::makeOpBinary($1, '*', $3); }
 	|	operand '%' operand			{ $$ = Expr::makeOpBinary($1, '%', $3); }
 	|	operand '^' operand			{ $$ = Expr::makeOpBinary($1, '^', $3); }
-	|	operand LIKE operand		{ $$ = Expr::makeOpBinary($1, Expr::LIKE, $3); }
+	|	operand LIKE operand		{ $$ = Expr::makeOpBinary($1, kOpLike, $3); }
-	|	operand NOT LIKE operand	{ $$ = Expr::makeOpBinary($1, Expr::NOT_LIKE, $4); }
+	|	operand NOT LIKE operand	{ $$ = Expr::makeOpBinary($1, kOpNotLike, $4); }
 	;
 
 logic_expr:
-		expr AND expr	{ $$ = Expr::makeOpBinary($1, Expr::AND, $3); }
+		expr AND expr	{ $$ = Expr::makeOpBinary($1, kOpAnd, $3); }
-	|	expr OR expr	{ $$ = Expr::makeOpBinary($1, Expr::OR, $3); }
+	|	expr OR expr	{ $$ = Expr::makeOpBinary($1, kOpOr, $3); }
 	;
 
 in_expr:
 		operand IN '(' expr_list ')'			{ $$ = Expr::makeInOperator($1, $4); }
-	|	operand NOT IN '(' expr_list ')'		{ $$ = Expr::makeOpUnary(Expr::NOT, Expr::makeInOperator($1, $5)); }
+	|	operand NOT IN '(' expr_list ')'		{ $$ = Expr::makeOpUnary(kOpNot, Expr::makeInOperator($1, $5)); }
 	|	operand IN '(' select_no_paren ')'		{ $$ = Expr::makeInOperator($1, $4); }
-	|	operand NOT IN '(' select_no_paren ')'	{ $$ = Expr::makeOpUnary(Expr::NOT, Expr::makeInOperator($1, $5)); }
+	|	operand NOT IN '(' select_no_paren ')'	{ $$ = Expr::makeOpUnary(kOpNot, Expr::makeInOperator($1, $5)); }
 	;
 
 // TODO: allow no else specified
@@ -686,16 +689,16 @@ case_expr:
 
 exists_expr:
 		EXISTS '(' select_no_paren ')' { $$ = Expr::makeExists($3); }
-	|	NOT EXISTS '(' select_no_paren ')' { $$ = Expr::makeOpUnary(Expr::NOT, Expr::makeExists($4)); }
+	|	NOT EXISTS '(' select_no_paren ')' { $$ = Expr::makeOpUnary(kOpNot, Expr::makeExists($4)); }
 	;
 
 comp_expr:
 		operand '=' operand			{ $$ = Expr::makeOpBinary($1, '=', $3); }
-	|	operand NOTEQUALS operand	{ $$ = Expr::makeOpBinary($1, Expr::NOT_EQUALS, $3); }
+	|	operand NOTEQUALS operand	{ $$ = Expr::makeOpBinary($1, kOpNotEquals, $3); }
 	|	operand '<' operand			{ $$ = Expr::makeOpBinary($1, '<', $3); }
 	|	operand '>' operand			{ $$ = Expr::makeOpBinary($1, '>', $3); }
-	|	operand LESSEQ operand		{ $$ = Expr::makeOpBinary($1, Expr::LESS_EQ, $3); }
+	|	operand LESSEQ operand		{ $$ = Expr::makeOpBinary($1, kOpLessEq, $3); }
-	|	operand GREATEREQ operand	{ $$ = Expr::makeOpBinary($1, Expr::GREATER_EQ, $3); }
+	|	operand GREATEREQ operand	{ $$ = Expr::makeOpBinary($1, kOpGreaterEq, $3); }
 	;
 
 function_expr:

src/sql/CreateStatement.h

@@ -1,5 +1,5 @@
-#ifndef __CREATE_STATEMENT_H__
+#ifndef __SQLPARSER__CREATE_STATEMENT_H__
-#define __CREATE_STATEMENT_H__
+#define __SQLPARSER__CREATE_STATEMENT_H__
 
 #include "SQLStatement.h"
 

src/sql/DeleteStatement.h

@@ -1,5 +1,5 @@
-#ifndef __DELETE_STATEMENT_H__
+#ifndef __SQLPARSER__DELETE_STATEMENT_H__
-#define __DELETE_STATEMENT_H__
+#define __SQLPARSER__DELETE_STATEMENT_H__
 
 #include "SQLStatement.h"
 

src/sql/DropStatement.h

@@ -1,5 +1,5 @@
-#ifndef __DROP_STATEMENT_H__
+#ifndef __SQLPARSER__DROP_STATEMENT_H__
-#define __DROP_STATEMENT_H__
+#define __SQLPARSER__DROP_STATEMENT_H__
 
 #include "SQLStatement.h"
 

src/sql/ExecuteStatement.h

@@ -1,5 +1,5 @@
-#ifndef __EXECUTE_STATEMENT_H__
+#ifndef __SQLPARSER__EXECUTE_STATEMENT_H__
-#define __EXECUTE_STATEMENT_H__
+#define __SQLPARSER__EXECUTE_STATEMENT_H__
 
 #include "SQLStatement.h"
 

src/sql/Expr.cpp

@@ -51,7 +51,7 @@ namespace hsql {
 
   Expr* Expr::makeOpBinary(Expr* expr1, char op, Expr* expr2) {
     Expr* e = new Expr(kExprOperator);
-    e->opType = SIMPLE_OP;
+    e->opType = kOpSimple;
     e->opChar = op;
     e->expr = expr1;
     e->expr2 = expr2;
@@ -61,7 +61,7 @@ namespace hsql {
   Expr* Expr::makeBetween(Expr* expr, Expr* left, Expr* right) {
     Expr* e = new Expr(kExprOperator);
     e->expr = expr;
-    e->opType = BETWEEN;
+    e->opType = kOpBetween;
     e->exprList = new std::vector<Expr*>();
     e->exprList->push_back(left);
     e->exprList->push_back(right);
@@ -71,7 +71,7 @@ namespace hsql {
   Expr* Expr::makeCase(Expr* expr, Expr* then, Expr* other) {
     Expr* e = new Expr(kExprOperator);
     e->expr = expr;
-    e->opType = CASE;
+    e->opType = kOpCase;
     e->exprList = new std::vector<Expr*>();
     e->exprList->push_back(then);
     e->exprList->push_back(other);
@@ -132,14 +132,14 @@ namespace hsql {
 
   Expr* Expr::makeExists(SelectStatement* select) {
     Expr* e = new Expr(kExprOperator);
-    e->opType = EXISTS;
+    e->opType = kOpExists;
     e->select = select;
     return e;
   }
 
   Expr* Expr::makeInOperator(Expr* expr, std::vector<Expr*>* exprList) {
     Expr* e = new Expr(kExprOperator);
-    e->opType = IN;
+    e->opType = kOpIn;
     e->expr = expr;
     e->exprList = exprList;
 
@@ -148,39 +148,39 @@ namespace hsql {
 
   Expr* Expr::makeInOperator(Expr* expr, SelectStatement* select) {
     Expr* e = new Expr(kExprOperator);
-    e->opType = IN;
+    e->opType = kOpIn;
     e->expr = expr;
     e->select = select;
 
     return e;
   }
 
-  bool Expr::isType(ExprType e_type) {
+  bool Expr::isType(ExprType exprType) const {
-    return e_type == type;
+    return exprType == type;
   }
 
-  bool Expr::isLiteral() {
+  bool Expr::isLiteral() const {
     return isType(kExprLiteralInt) || isType(kExprLiteralFloat) || isType(kExprLiteralString) || isType(kExprPlaceholder);
   }
 
-  bool Expr::hasAlias() {
+  bool Expr::hasAlias() const {
     return alias != NULL;
   }
 
-  bool Expr::hasTable() {
+  bool Expr::hasTable() const {
     return table != NULL;
   }
 
-  char* Expr::getName() {
+  const char* Expr::getName() const {
     if (alias != NULL) return alias;
     else return name;
   }
 
-  bool Expr::isSimpleOp() {
+  bool Expr::isSimpleOp() const {
-    return opType == SIMPLE_OP;
+    return opType == kOpSimple;
   }
 
-  bool Expr::isSimpleOp(char op) {
+  bool Expr::isSimpleOp(char op) const {
     return isSimpleOp() && opChar == op;
   }
 

src/sql/Expr.h

@@ -1,5 +1,5 @@
-#ifndef __EXPRESSION_H__
+#ifndef __SQLPARSER__EXPR_H__
-#define __EXPRESSION_H__
+#define __SQLPARSER__EXPR_H__
 
 #include <stdlib.h>
 #include <memory>
@@ -24,48 +24,45 @@ namespace hsql {
     kExprSelect
   };
 
-  typedef struct Expr Expr;
-
-  // Represents SQL expressions (i.e. literals, operators, column_refs).
-  // TODO: When destructing a placeholder expression, we might need to alter the placeholder_list.
-  struct Expr {
   // Operator types. These are important for expressions of type kExprOperator.
   // Trivial types are those that can be described by a single character e.g:
   // + - * / < > = %
   // Non-trivial are: <> <= >= LIKE ISNULL NOT
   enum OperatorType {
-      NONE,
+    kOpNone,
 
     // Ternary operators
-      BETWEEN,
+    kOpBetween,
-      CASE,
+    kOpCase,
 
     // Binary operators.
-      SIMPLE_OP,
+    // Simple operators are identified by the opChar field (e.g. +, -, =, >, <).
-      NOT_EQUALS,
+    kOpSimple,
-      LESS_EQ,
+
-      GREATER_EQ,
+    kOpNotEquals,
-      LIKE,
+    kOpLessEq,
-      NOT_LIKE,
+    kOpGreaterEq,
-      AND,
+    kOpLike,
-      OR,
+    kOpNotLike,
-      IN,
+    kOpAnd,
+    kOpOr,
+    kOpIn,
 
     // Unary operators.
-      NOT,
+    kOpNot,
-      UMINUS,
+    kOpMinus,
-      ISNULL,
+    kOpIsNull,
-      EXISTS
+    kOpExists
   };
 
+  typedef struct Expr Expr;
 
+  // Represents SQL expressions (i.e. literals, operators, column_refs).
+  // TODO: When destructing a placeholder expression, we might need to alter the placeholder_list.
+  struct Expr {
 
     Expr(ExprType type);
-
+    virtual ~Expr();
-    // Interesting side-effect:
-    // Making the destructor virtual used to cause segmentation faults.
-    // TODO: inspect.
-    ~Expr();
 
     ExprType type;
 
@@ -88,19 +85,19 @@ namespace hsql {
 
     // Convenience accessor methods.
 
-    bool isType(ExprType e_type);
+    bool isType(ExprType exprType) const;
 
-    bool isLiteral();
+    bool isLiteral() const;
 
-    bool hasAlias();
+    bool hasAlias() const;
 
-    bool hasTable();
+    bool hasTable() const;
 
-    char* getName();
+    const char* getName() const;
 
-    bool isSimpleOp();
+    bool isSimpleOp() const;
 
-    bool isSimpleOp(char op);
+    bool isSimpleOp(char op) const;
 
 
     // Static constructors.

src/sql/ImportStatement.h

@@ -1,5 +1,5 @@
-#ifndef __IMPORT_STATEMENT_H__
+#ifndef __SQLPARSER__IMPORT_STATEMENT_H__
-#define __IMPORT_STATEMENT_H__
+#define __SQLPARSER__IMPORT_STATEMENT_H__
 
 #include "SQLStatement.h"
 

src/sql/InsertStatement.h

@@ -1,5 +1,5 @@
-#ifndef __INSERT_STATEMENT_H__
+#ifndef __SQLPARSER__INSERT_STATEMENT_H__
-#define __INSERT_STATEMENT_H__
+#define __SQLPARSER__INSERT_STATEMENT_H__
 
 #include "SQLStatement.h"
 #include "SelectStatement.h"

src/sql/PrepareStatement.h

@@ -1,5 +1,5 @@
-#ifndef __PREPARE_STATEMENT_H__
+#ifndef __SQLPARSER__PREPARE_STATEMENT_H__
-#define __PREPARE_STATEMENT_H__
+#define __SQLPARSER__PREPARE_STATEMENT_H__
 
 #include "../SQLParserResult.h"
 #include "SQLStatement.h"
@@ -24,6 +24,8 @@ namespace hsql {
     void setPlaceholders(std::vector<void*> ph);
 
     char* name;
+
+    // The result that is stored within this prepared statement.
     SQLParserResult* query;
 
     // The expressions are not owned by this statement.

src/sql/SQLStatement.h

@@ -1,5 +1,5 @@
-#ifndef __SQLSTATEMENT_H__
+#ifndef __SQLPARSER__SQLSTATEMENT_H__
-#define __SQLSTATEMENT_H__
+#define __SQLPARSER__SQLSTATEMENT_H__
 
 #include "Expr.h"
 #include <vector>
@@ -29,11 +29,13 @@ namespace hsql {
 
     virtual ~SQLStatement();
 
-    virtual StatementType type() const;
+    StatementType type() const;
+
+    bool isType(StatementType type) const;
 
    private:
     StatementType type_;
   };
 
 } // namespace hsql
-#endif // __SQLSTATEMENT_H__
+#endif // __SQLPARSER__SQLSTATEMENT_H__

src/sql/SelectStatement.h

@@ -1,5 +1,5 @@
-#ifndef __SELECT_STATEMENT_H__
+#ifndef __SQLPARSER__SELECT_STATEMENT_H__
-#define __SELECT_STATEMENT_H__
+#define __SQLPARSER__SELECT_STATEMENT_H__
 
 #include "SQLStatement.h"
 #include "Expr.h"
@@ -13,7 +13,6 @@ namespace hsql {
 
   /**
    * Description of the order by clause within a select statement
-   * TODO: hold multiple expressions to be sorted by
    */
   struct OrderDescription {
     OrderDescription(OrderType type, Expr* expr);
@@ -41,8 +40,7 @@ namespace hsql {
    */
   struct GroupByDescription {
     GroupByDescription();
-    // TODO: make virtual
+    virtual ~GroupByDescription();
-    ~GroupByDescription();
 
     std::vector<Expr*>* columns;
     Expr* having;

src/sql/Table.h

@@ -1,5 +1,5 @@
-#ifndef __TABLEREF_H__
+#ifndef __SQLPARSER__TABLEREF_H__
-#define __TABLEREF_H__
+#define __SQLPARSER__TABLEREF_H__
 
 #include "Expr.h"
 #include <stdio.h>
@@ -35,10 +35,10 @@ namespace hsql {
     JoinDefinition* join;
 
     // Returns true if a schema is set.
-    bool hasSchema();
+    bool hasSchema() const;
 
     // Returns the alias, if it is set. Otherwise the name.
-    char* getName();
+    const char* getName() const;
   };
 
   // Possible types of joins.

src/sql/UpdateStatement.h

@@ -1,5 +1,5 @@
-#ifndef __UPDATE_STATEMENT_H__
+#ifndef __SQLPARSER__UPDATE_STATEMENT_H__
-#define __UPDATE_STATEMENT_H__
+#define __SQLPARSER__UPDATE_STATEMENT_H__
 
 #include "SQLStatement.h"
 

src/sql/statements.cpp

@@ -13,6 +13,10 @@ namespace hsql {
     return type_;
   }
 
+  bool SQLStatement::isType(StatementType type) const {
+    return (type_ == type);
+  }
+
   // ColumnDefinition
   ColumnDefinition::ColumnDefinition(char* name, DataType type) :
     name(name),
@@ -268,11 +272,11 @@ namespace hsql {
     }
   }
 
-  bool TableRef::hasSchema() {
+  bool TableRef::hasSchema() const {
     return schema != NULL;
   }
 
-  char* TableRef::getName() {
+  const char* TableRef::getName() const {
     if (alias != NULL) return alias;
     else return name;
   }

src/sql/statements.h

@@ -1,5 +1,5 @@
-#ifndef __STATEMENTS_H__
+#ifndef __SQLPARSER__STATEMENTS_H__
-#define __STATEMENTS_H__
+#define __SQLPARSER__STATEMENTS_H__
 
 #include "SelectStatement.h"
 #include "ImportStatement.h"
@@ -11,4 +11,4 @@
 #include "PrepareStatement.h"
 #include "ExecuteStatement.h"
 
-#endif // __STATEMENTS_H__ 
+#endif // __SQLPARSER__STATEMENTS_H__ 

src/util/sqlhelper.cpp

@@ -63,16 +63,16 @@ namespace hsql {
     }
 
     switch (expr->opType) {
-    case Expr::SIMPLE_OP:
+    case kOpSimple:
       inprintC(expr->opChar, numIndent);
       break;
-    case Expr::AND:
+    case kOpAnd:
       inprint("AND", numIndent);
       break;
-    case Expr::OR:
+    case kOpOr:
       inprint("OR", numIndent);
       break;
-    case Expr::NOT:
+    case kOpNot:
       inprint("NOT", numIndent);
       break;
     default:

src/util/sqlhelper.h

@@ -1,7 +1,7 @@
-#ifndef __SQLHELPER_H__
+#ifndef __SQLPARSER__SQLHELPER_H__
-#define __SQLHELPER_H__
+#define __SQLPARSER__SQLHELPER_H__
 
-#include "sql/statements.h"
+#include "../sql/statements.h"
 
 namespace hsql {
 

test/prepare_tests.cpp

@@ -0,0 +1,82 @@
+
+#include "thirdparty/microtest/microtest.h"
+#include "sql_asserts.h"
+#include "SQLParser.h"
+
+using hsql::kExprPlaceholder;
+
+using hsql::kStmtDrop;
+using hsql::kStmtExecute;
+using hsql::kStmtInsert;
+using hsql::kStmtPrepare;
+using hsql::kStmtSelect;
+
+using hsql::DropStatement;
+using hsql::ExecuteStatement;
+using hsql::InsertStatement;
+using hsql::PrepareStatement;
+using hsql::SelectStatement;
+
+
+TEST(PrepareSingleStatementTest) {
+  const std::string query = "PREPARE test: SELECT * FROM students WHERE grade = ?;";
+  TEST_PARSE_SINGLE_SQL(query, kStmtPrepare, PrepareStatement, result, prepare);
+
+  const SelectStatement* select = (const SelectStatement*) prepare->query->getStatement(0);
+
+  ASSERT(select->whereClause->isSimpleOp('='));
+  ASSERT_EQ(select->whereClause->expr2, prepare->placeholders[0])
+}
+
+TEST(PrepareMultiStatementTest) {
+  const std::string query = "PREPARE test {"
+                            "INSERT INTO test VALUES(?);"
+                            "SELECT ?, test FROM test WHERE c1 = ?;"
+                            "};"
+                            "PREPARE stmt: SELECT * FROM data WHERE c1 = ?;"
+                            "DEALLOCATE PREPARE stmt;";
+
+  TEST_PARSE_SQL_QUERY(query, result, 3);
+
+  TEST_CAST_STMT(result, 0, kStmtPrepare, PrepareStatement, prep1);
+  TEST_CAST_STMT(result, 1, kStmtPrepare, PrepareStatement, prep2);
+  TEST_CAST_STMT(result, 2, kStmtDrop, DropStatement, drop);
+
+  // Prepare Statement #1
+  ASSERT_STREQ(prep1->name, "test");
+  ASSERT_EQ(prep1->placeholders.size(), 3);
+  ASSERT_EQ(prep1->query->size(), 2);
+
+  TEST_CAST_STMT((*prep1->query), 0, kStmtInsert, InsertStatement, insert);
+  TEST_CAST_STMT((*prep1->query), 1, kStmtSelect, SelectStatement, select);
+
+  ASSERT(insert->values->at(0)->isType(kExprPlaceholder));
+  ASSERT(select->selectList->at(0)->isType(kExprPlaceholder));
+  ASSERT(select->whereClause->expr2->isType(kExprPlaceholder));
+
+  // Check IDs of placeholders
+  ASSERT_EQ(insert->values->at(0)->ival, 0);
+  ASSERT_EQ(insert->values->at(0), prep1->placeholders[0]);
+
+  ASSERT_EQ(select->selectList->at(0)->ival, 1);
+  ASSERT_EQ(select->selectList->at(0), prep1->placeholders[1]);
+
+  ASSERT_EQ(select->whereClause->expr2->ival, 2);
+  ASSERT_EQ(select->whereClause->expr2, prep1->placeholders[2]);
+
+  // Prepare Statement #2
+  ASSERT_STREQ(prep2->name, "stmt");
+  ASSERT_EQ(prep2->placeholders.size(), 1);
+
+  // Deallocate Statement
+  ASSERT_EQ(drop->type, DropStatement::kPreparedStatement);
+  ASSERT_STREQ(drop->name, "stmt");
+}
+
+
+TEST(ExecuteStatementTest) {
+  TEST_PARSE_SINGLE_SQL("EXECUTE test(1, 2);", kStmtExecute, ExecuteStatement, result, stmt);
+
+  ASSERT_STREQ(stmt->name, "test");
+  ASSERT_EQ(stmt->parameters->size(), 2);
+}

test/select_tests.cpp

@@ -16,8 +16,6 @@ TEST(SelectTest) {
 
   ASSERT_NULL(stmt->whereClause);
   ASSERT_NULL(stmt->groupBy);
-
-  delete result;
 }
 
 TEST(SelectExprTest) {
@@ -55,8 +53,6 @@ TEST(SelectExprTest) {
   ASSERT_EQ(stmt->selectList->at(2)->exprList->at(1)->exprList->size(), 1);
   ASSERT(stmt->selectList->at(2)->exprList->at(1)->exprList->at(0)->isType(kExprColumnRef));
   ASSERT_STREQ(stmt->selectList->at(2)->exprList->at(1)->exprList->at(0)->getName(), "un");
-
-  delete result;
 }
 
 
@@ -76,8 +72,6 @@ TEST(SelectHavingTest) {
   ASSERT(group->having->isSimpleOp('<'));
   ASSERT(group->having->expr->isType(kExprFunctionRef));
   ASSERT(group->having->expr2->isType(kExprLiteralFloat));
-
-  delete result;
 }
 
 
@@ -91,8 +85,6 @@ TEST(SelectDistinctTest) {
 
   ASSERT(stmt->selectDistinct);
   ASSERT_NULL(stmt->whereClause);
-
-  delete result;
 }
 
 TEST(SelectGroupDistinctTest) {
@@ -107,8 +99,6 @@ TEST(SelectGroupDistinctTest) {
   ASSERT_EQ(stmt->selectList->size(), 3);
   ASSERT(!stmt->selectList->at(1)->distinct);
   ASSERT(stmt->selectList->at(2)->distinct);
-
-  delete result;
 }
 
 TEST(OrderByTest) {
@@ -128,8 +118,6 @@ TEST(OrderByTest) {
 
   ASSERT_EQ(stmt->order->at(1)->type, kOrderDesc);
   ASSERT_STREQ(stmt->order->at(1)->expr->name, "city");
-
-  delete result;
 }
 
 TEST(SelectBetweenTest) {
@@ -144,7 +132,7 @@ TEST(SelectBetweenTest) {
   Expr* where = stmt->whereClause;
   ASSERT_NOTNULL(where);
   ASSERT(where->isType(kExprOperator));
-  ASSERT_EQ(where->opType, Expr::BETWEEN);
+  ASSERT_EQ(where->opType, kOpBetween);
 
   ASSERT_STREQ(where->expr->getName(), "grade");
   ASSERT(where->expr->isType(kExprColumnRef));
@@ -154,8 +142,6 @@ TEST(SelectBetweenTest) {
   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(SelectConditionalSelectTest) {
@@ -169,7 +155,7 @@ TEST(SelectConditionalSelectTest) {
   Expr* where = stmt->whereClause;
   ASSERT_NOTNULL(where);
   ASSERT(where->isType(kExprOperator));
-  ASSERT_EQ(where->opType, Expr::AND);
+  ASSERT_EQ(where->opType, kOpAnd);
 
   // a = (SELECT ...)
   Expr* cond1 = where->expr;
@@ -189,13 +175,11 @@ TEST(SelectConditionalSelectTest) {
 
   // EXISTS (SELECT ...)
   Expr* cond2 = where->expr2;
-  ASSERT_EQ(cond2->opType, Expr::EXISTS);
+  ASSERT_EQ(cond2->opType, kOpExists);
   ASSERT_NOTNULL(cond2->select);
 
   SelectStatement* ex_select = cond2->select;
   ASSERT_STREQ(ex_select->fromTable->getName(), "test");
-
-  delete result;
 }
 
 TEST(SelectCaseWhen) {
@@ -216,10 +200,8 @@ TEST(SelectCaseWhen) {
   Expr* caseExpr = func->exprList->at(0);
   ASSERT_NOTNULL(caseExpr);
   ASSERT(caseExpr->isType(kExprOperator));
-  ASSERT_EQ(caseExpr->opType, Expr::CASE);
+  ASSERT_EQ(caseExpr->opType, kOpCase);
   ASSERT(caseExpr->expr->isType(kExprOperator));
   ASSERT(caseExpr->expr->isSimpleOp('='));
   ASSERT_EQ(caseExpr->exprList->size(), 2);
-
-  delete result;
 }

test/sql_asserts.h

@@ -3,20 +3,21 @@
 
 
 #define TEST_PARSE_SQL_QUERY(query, result, numStatements) \
-	const SQLParserResult* result = SQLParser::parseSQLString(query); \
+	hsql::SQLParserResult result; \
-	ASSERT(result->isValid()); \
+  hsql::SQLParser::parseSQLString(query, &result); \
-	ASSERT_EQ(result->size(), numStatements);
+	ASSERT(result.isValid()); \
+	ASSERT_EQ(result.size(), numStatements);
 
 
 #define TEST_PARSE_SINGLE_SQL(query, stmtType, stmtClass, result, outputVar) \
 	TEST_PARSE_SQL_QUERY(query, result, 1); \
-    ASSERT_EQ(result->getStatement(0)->type(), stmtType); \
+    ASSERT_EQ(result.getStatement(0)->type(), stmtType); \
-    const stmtClass* outputVar = (const stmtClass*) result->getStatement(0);
+    const stmtClass* outputVar = (const stmtClass*) result.getStatement(0);
 
 
 #define TEST_CAST_STMT(result, stmt_index, stmtType, stmtClass, outputVar) \
-    ASSERT_EQ(result->getStatement(stmt_index)->type(), stmtType); \
+    ASSERT_EQ(result.getStatement(stmt_index)->type(), stmtType); \
-    const stmtClass* outputVar = (const stmtClass*) result->getStatement(stmt_index);
+    const stmtClass* outputVar = (const stmtClass*) result.getStatement(stmt_index);
 
 
 #endif

test/sql_grammar_test.cpp

@@ -79,23 +79,22 @@ TEST(AutoGrammarTest) {
     start = std::chrono::system_clock::now();
 
     // Parsing
-    SQLParserResult* result = SQLParser::parseSQLString(sql.c_str());
+    SQLParserResult result;
+    SQLParser::parseSQLString(sql.c_str(), &result);
 
     end = std::chrono::system_clock::now();
     std::chrono::duration<double> elapsed_seconds = end - start;
     double us = elapsed_seconds.count() * 1000 * 1000;
 
-    if (expectFalse == result->isValid()) {
+    if (expectFalse == result.isValid()) {
       printf("\033[0;31m{  failed}\033[0m\n");
-      printf("\t\033[0;31m%s (L%d:%d)\n\033[0m", result->errorMsg(), result->errorLine(), result->errorColumn());
+      printf("\t\033[0;31m%s (L%d:%d)\n\033[0m", result.errorMsg(), result.errorLine(), result.errorColumn());
       printf("\t%s\n", sql.c_str());
       numFailed++;
     } else {
       // TODO: indicate whether expectFalse was set
       printf("\033[0;32m{      ok} (%.1fus)\033[0m %s\n", us, sql.c_str());
     }
-
-    delete result;
   }
 
   if (numFailed == 0) {

test/sql_tests.cpp

@@ -3,36 +3,40 @@
  */
 
 #include "thirdparty/microtest/microtest.h"
-#include "sql_asserts.h"
+
 #include "SQLParser.h"
-#include "sqlhelper.h"
+#include "util/sqlhelper.h"
+
+#include "sql_asserts.h"
 
 using namespace hsql;
 
 
 TEST(DeleteStatementTest) {
-  const SQLParserResult* result = SQLParser::parseSQLString("DELETE FROM students WHERE grade > 2.0;");
+  SQLParserResult result;
-  ASSERT(result->isValid());
+  SQLParser::parseSQLString("DELETE FROM students WHERE grade > 2.0;", &result);
-  ASSERT_EQ(result->size(), 1);
-  ASSERT(result->getStatement(0)->type() == kStmtDelete);
 
-  const DeleteStatement* stmt = (const DeleteStatement*) result->getStatement(0);
+  ASSERT(result.isValid());
+  ASSERT_EQ(result.size(), 1);
+  ASSERT(result.getStatement(0)->type() == kStmtDelete);
+
+  const DeleteStatement* stmt = (const DeleteStatement*) result.getStatement(0);
   ASSERT_STREQ(stmt->tableName, "students");
   ASSERT_NOTNULL(stmt->expr);
   ASSERT(stmt->expr->isType(kExprOperator));
   ASSERT_STREQ(stmt->expr->expr->name, "grade");
   ASSERT_EQ(stmt->expr->expr2->fval, 2.0);
-
-  delete result;
 }
 
 TEST(CreateStatementTest) {
-  const SQLParserResult* result = SQLParser::parseSQLString("CREATE TABLE students (name TEXT, student_number INT, city INTEGER, grade DOUBLE)");
+  SQLParserResult result;
-  ASSERT(result->isValid());
+  SQLParser::parseSQLString("CREATE TABLE students (name TEXT, student_number INT, city INTEGER, grade DOUBLE)", &result);
-  ASSERT_EQ(result->size(), 1);
-  ASSERT_EQ(result->getStatement(0)->type(), kStmtCreate);
 
-  const CreateStatement* stmt = (const CreateStatement*) result->getStatement(0);
+  ASSERT(result.isValid());
+  ASSERT_EQ(result.size(), 1);
+  ASSERT_EQ(result.getStatement(0)->type(), kStmtCreate);
+
+  const CreateStatement* stmt = (const CreateStatement*) result.getStatement(0);
   ASSERT_EQ(stmt->type, CreateStatement::kTable);
   ASSERT_STREQ(stmt->tableName, "students");
   ASSERT_NOTNULL(stmt->columns);
@@ -45,18 +49,18 @@ TEST(CreateStatementTest) {
   ASSERT_EQ(stmt->columns->at(1)->type, ColumnDefinition::INT);
   ASSERT_EQ(stmt->columns->at(2)->type, ColumnDefinition::INT);
   ASSERT_EQ(stmt->columns->at(3)->type, ColumnDefinition::DOUBLE);
-
-  delete result;
 }
 
 
 TEST(UpdateStatementTest) {
-  const SQLParserResult* result = SQLParser::parseSQLString("UPDATE students SET grade = 5.0, name = 'test' WHERE name = 'Max Mustermann';");
+  SQLParserResult result;
-  ASSERT(result->isValid());
+  SQLParser::parseSQLString("UPDATE students SET grade = 5.0, name = 'test' WHERE name = 'Max Mustermann';", &result);
-  ASSERT_EQ(result->size(), 1);
-  ASSERT_EQ(result->getStatement(0)->type(), kStmtUpdate);
 
-  const UpdateStatement* stmt = (const UpdateStatement*) result->getStatement(0);
+  ASSERT(result.isValid());
+  ASSERT_EQ(result.size(), 1);
+  ASSERT_EQ(result.getStatement(0)->type(), kStmtUpdate);
+
+  const UpdateStatement* stmt = (const UpdateStatement*) result.getStatement(0);
   ASSERT_NOTNULL(stmt->table);
   ASSERT_STREQ(stmt->table->name, "students");
 
@@ -74,9 +78,6 @@ TEST(UpdateStatementTest) {
   ASSERT(stmt->where->isSimpleOp('='));
   ASSERT_STREQ(stmt->where->expr->name, "name");
   ASSERT_STREQ(stmt->where->expr2->name, "Max Mustermann");
-  \
-
-  delete result;
 }
 
 
@@ -90,8 +91,6 @@ TEST(InsertStatementTest) {
 
   ASSERT_EQ(stmt->values->size(), 4);
   // TODO
-
-  delete result;
 }
 
 
@@ -106,66 +105,26 @@ TEST(DropTableStatementTest) {
   ASSERT_EQ(stmt->type, DropStatement::kTable);
   ASSERT_NOTNULL(stmt->name);
   ASSERT_STREQ(stmt->name, "students");
-
-  delete result;
 }
 
+TEST(ReleaseStatementTest) {
+  TEST_PARSE_SINGLE_SQL(
+    "SELECT * FROM students;",
+    kStmtSelect,
+    SelectStatement,
+    result,
+    stmt);
 
-TEST(PrepareStatementTest) {
+  ASSERT_EQ(1, result.size());
-  std::string query = "PREPARE test {"
+  ASSERT_NULL(stmt->whereClause);
-                      "INSERT INTO test VALUES(?);"
-                      "SELECT ?, test FROM test WHERE c1 = ?;"
-                      "};"
-                      "PREPARE stmt: SELECT * FROM data WHERE c1 = ?;"
-                      "DEALLOCATE PREPARE stmt;";
 
-  TEST_PARSE_SQL_QUERY(query, result, 3);
+  std::vector<SQLStatement*> statements = result.releaseStatements();
 
-  TEST_CAST_STMT(result, 0, kStmtPrepare, PrepareStatement, prep1);
+  ASSERT_EQ(0, result.size());
-  TEST_CAST_STMT(result, 1, kStmtPrepare, PrepareStatement, prep2);
-  TEST_CAST_STMT(result, 2, kStmtDrop, DropStatement, drop);
 
-  // Prepare Statement #1
+  for (SQLStatement* stmt : statements) {
-  ASSERT_STREQ(prep1->name, "test");
+    delete stmt;
-  ASSERT_EQ(prep1->placeholders.size(), 3);
+  }
-  ASSERT_EQ(prep1->query->size(), 2);
-
-  TEST_CAST_STMT(prep1->query, 0, kStmtInsert, InsertStatement, insert);
-  TEST_CAST_STMT(prep1->query, 1, kStmtSelect, SelectStatement, select);
-
-  ASSERT(insert->values->at(0)->isType(kExprPlaceholder));
-  ASSERT(select->selectList->at(0)->isType(kExprPlaceholder));
-  ASSERT(select->whereClause->expr2->isType(kExprPlaceholder));
-
-  // Check IDs of placeholders
-  ASSERT_EQ(insert->values->at(0)->ival, 0);
-  ASSERT_EQ(insert->values->at(0), prep1->placeholders[0]);
-
-  ASSERT_EQ(select->selectList->at(0)->ival, 1);
-  ASSERT_EQ(select->selectList->at(0), prep1->placeholders[1]);
-
-  ASSERT_EQ(select->whereClause->expr2->ival, 2);
-  ASSERT_EQ(select->whereClause->expr2, prep1->placeholders[2]);
-
-  // Prepare Statement #2
-  ASSERT_STREQ(prep2->name, "stmt");
-  ASSERT_EQ(prep2->placeholders.size(), 1);
-
-  // Deallocate Statement
-  ASSERT_EQ(drop->type, DropStatement::kPreparedStatement);
-  ASSERT_STREQ(drop->name, "stmt");
-
-  delete result;
-}
-
-
-TEST(ExecuteStatementTest) {
-  TEST_PARSE_SINGLE_SQL("EXECUTE test(1, 2);", kStmtExecute, ExecuteStatement, result, stmt);
-
-  ASSERT_STREQ(stmt->name, "test");
-  ASSERT_EQ(stmt->parameters->size(), 2);
-
-  delete result;
 }
 
 TEST_MAIN();

test/tpc_h_tests.cpp

@@ -1,7 +1,9 @@
 #include "thirdparty/microtest/microtest.h"
-#include "sql_asserts.h"
+
 #include "SQLParser.h"
-#include "sqlhelper.h"
+#include "util/sqlhelper.h"
+
+#include "sql_asserts.h"
 
 #include <string>
 #include <fstream>
@@ -37,15 +39,15 @@ TEST(TPCHQueryGrammarTests) {
   for (const std::string& file_path : files) {
     std::string query = readFileContents(file_path);
 
-    SQLParserResult* result = SQLParser::parseSQLString(query.c_str());
+    SQLParserResult result;
-    if (!result->isValid()) {
+    SQLParser::parseSQLString(query.c_str(), &result);
+    if (!result.isValid()) {
       mt::printFailed(file_path.c_str());
-      printf("%s           %s (L%d:%d)%s\n", mt::red(), result->errorMsg(), result->errorLine(), result->errorColumn(), mt::def());
+      printf("%s           %s (L%d:%d)%s\n", mt::red(), result.errorMsg(), result.errorLine(), result.errorColumn(), mt::def());
       ++testsFailed;
     } else {
       mt::printOk(file_path.c_str());
     }
-    delete result;
   }
   ASSERT_EQ(testsFailed, 0);
 }
@@ -53,11 +55,12 @@ TEST(TPCHQueryGrammarTests) {
 TEST(TPCHQueryDetailTest) {
   std::string query = readFileContents("test/queries/tpc-h-16-22.sql");
 
-  SQLParserResult* result = SQLParser::parseSQLString(query.c_str());
+  SQLParserResult result;
-  ASSERT(result->isValid());
+  SQLParser::parseSQLString(query.c_str(), &result);
-  ASSERT_EQ(result->size(), 7);
+  ASSERT(result.isValid());
+  ASSERT_EQ(result.size(), 7);
 
-  const SQLStatement* stmt20 = result->getStatement(4);
+  const SQLStatement* stmt20 = result.getStatement(4);
   ASSERT_EQ(stmt20->type(), kStmtSelect);
 
   const SelectStatement* select20 = (const SelectStatement*) stmt20;
@@ -69,18 +72,18 @@ TEST(TPCHQueryDetailTest) {
   Expr* where = select20->whereClause;
   ASSERT_NOTNULL(where);
   ASSERT(where->isType(kExprOperator));
-  ASSERT_EQ(where->opType, Expr::AND);
+  ASSERT_EQ(where->opType, kOpAnd);
 
   Expr* andExpr2 = where->expr;
   ASSERT_NOTNULL(andExpr2);
   ASSERT(andExpr2->isType(kExprOperator));
-  ASSERT_EQ(andExpr2->opType, Expr::AND);
+  ASSERT_EQ(andExpr2->opType, kOpAnd);
 
   // Test IN expression.
   Expr* inExpr = andExpr2->expr;
   ASSERT_NOTNULL(inExpr);
   ASSERT(inExpr->isType(kExprOperator));
-  ASSERT_EQ(inExpr->opType, Expr::IN);
+  ASSERT_EQ(inExpr->opType, kOpIn);
 
   ASSERT_STREQ(inExpr->expr->getName(), "S_SUPPKEY");
   ASSERT_NOTNULL(inExpr->select);
@@ -93,6 +96,4 @@ TEST(TPCHQueryDetailTest) {
   ASSERT_EQ(select20->order->size(), 1);
   ASSERT(select20->order->at(0)->expr->isType(kExprColumnRef));
   ASSERT_STREQ(select20->order->at(0)->expr->getName(), "S_NAME");
-
-  delete result;
 }