some compilation refactoring

Data/ODBC/Makefile

@@ -1,7 +1,7 @@
 #
 # Makefile
 #
-# $Id: //poco/Main/DataConnectors/ODBC/Makefile#2 $
+# $Id: //poco/Main/Data/ODBC/Makefile#2 $
 #
 # Makefile for Poco ODBC
 #

Data/ODBC/include/Poco/Data/ODBC/ODBCStatementImpl.h

@@ -94,12 +94,12 @@ protected:
 	bool canBind() const;
 		/// Returns true if a valid statement is set and we can bind.
 
-	bool compileImpl();
+	bool canCompile() const;
+		/// Returns true if another compile is possible.
+
+	void compileImpl();
 		/// Compiles the statement, doesn't bind yet. 
 		/// Does nothing if the statement has already been compiled.
-		/// In this implementation, batch statements are compiled in a single step.
-		/// Therefore, this function always return false indicating no need for
-		/// subsequent compilation.
 
 	void bindImpl();
 		/// Binds all parameters and executes the statement.
@@ -174,7 +174,7 @@ private:
 	ColumnPtrVecVec       _columnPtrs;
 	bool                  _prepared;
 	mutable Poco::UInt32  _affectedRowCount;
-	bool                  _compiled;
+	bool                  _canCompile;
 };
 
 
@@ -216,6 +216,12 @@ inline bool ODBCStatementImpl::nextRowReady() const
 }
 
 
+inline bool ODBCStatementImpl::canCompile() const
+{
+	return _canCompile;
+}
+
+
 } } } // namespace Poco::Data::ODBC
 
 

Data/ODBC/src/ODBCStatementImpl.cpp

@@ -66,7 +66,7 @@ ODBCStatementImpl::ODBCStatementImpl(SessionImpl& rSession):
 	_nextResponse(0),
 	_prepared(false),
 	_affectedRowCount(0),
-	_compiled(false)
+	_canCompile(true)
 {
 }
 
@@ -84,11 +84,10 @@ ODBCStatementImpl::~ODBCStatementImpl()
 }
 
 
-bool ODBCStatementImpl::compileImpl()
+void ODBCStatementImpl::compileImpl()
 {
-	if (_compiled) return false;
+	if (!_canCompile) return;
 
-	clear();
 	_stepCalled = false;
 	_nextResponse = 0;
 
@@ -121,8 +120,7 @@ bool ODBCStatementImpl::compileImpl()
 	makeInternalExtractors();
 	doPrepare();
 
-	 _compiled = true;
-	 return false;
+	 _canCompile = false;
 }
 
 

Data/ODBC/testsuite/src/ODBCOracleTest.cpp

@@ -602,7 +602,7 @@ void ODBCOracleTest::testMultipleResults()
 		*_pSession << sql, now;
 		session().setFeature("autoBind", bindValue(i));
 		session().setFeature("autoExtract", bindValue(i+1));
-		executor().multipleResults("{call multiResultsProcedure(?, ?)}");
+		executor().multipleResults("{call multiResultsProcedure(?, ?, ?)}");
 
 		i += 2;
 	}

Data/SQLite/include/Poco/Data/SQLite/SQLiteStatementImpl.h

@@ -95,15 +95,16 @@ protected:
 	bool canBind() const;
 		/// Returns true if a valid statement is set and we can bind.
 
-	bool compileImpl();
+	bool canCompile() const;
+		/// Returns true if statement can compile.
+
+	void compileImpl();
 		/// Compiles the statement, doesn't bind yet.
 		/// Returns true if the statement was succesfully compiled.
 		/// The way SQLite handles batches of statmeents is by compiling
 		/// one at a time and returning a pointer to the next one.
-		/// The remainder of the statement is remebered in a string
-		/// buffer pointed to by _pLeftover member. Non-zero _pLeftover
-		/// pointing to an empty string means no more statements left
-		/// to compile.
+		/// The remainder of the statement is kept in a string
+		/// buffer pointed to by _pLeftover member.
 
 	void bindImpl();
 		/// Binds parameters
@@ -139,6 +140,7 @@ private:
 	BindIt           _bindBegin;
 	bool             _canBind;
 	bool             _isExtracted;
+	bool             _canCompile;
 };
 
 
@@ -163,6 +165,12 @@ inline bool SQLiteStatementImpl::canBind() const
 }
 
 
+inline bool SQLiteStatementImpl::canCompile() const
+{
+	return _canCompile;
+}
+
+
 } } } // namespace Poco::Data::SQLite
 
 

Data/SQLite/src/SQLiteStatementImpl.cpp

@@ -56,7 +56,8 @@ SQLiteStatementImpl::SQLiteStatementImpl(Poco::Data::SessionImpl& rSession, sqli
 	_nextResponse(0),
 	_affectedRowCount(0),
 	_canBind(false),
-	_isExtracted(false)
+	_isExtracted(false),
+	_canCompile(true)
 {
 	_columns.resize(1);
 }
@@ -68,15 +69,9 @@ SQLiteStatementImpl::~SQLiteStatementImpl()
 }
 
 
-bool SQLiteStatementImpl::compileImpl()
+void SQLiteStatementImpl::compileImpl()
 {
-	if (_pLeftover && _pLeftover->empty()) 
-	{
-		_pLeftover = 0;
-		return false;
-	}
-	else if (!_pLeftover)
-		_bindBegin = bindings().begin();
+	if (!_pLeftover) _bindBegin = bindings().begin();
 
 	std::string statement(toString());
 	sqlite3_stmt* pStmt = 0;
@@ -119,10 +114,15 @@ bool SQLiteStatementImpl::compileImpl()
 	//For last statement in a batch (or a single statement), pLeftover == "", so the next call
 	// to compileImpl() shall return false immediately when there are no more statements left.
 	std::string leftOver(pLeftover);
+	trimInPlace(leftOver);
 	clear();
 	_pStmt = pStmt;
-	_pLeftover = new std::string(leftOver);
-	trimInPlace(*_pLeftover);
+	if (!leftOver.empty())
+	{
+		_pLeftover = new std::string(leftOver);
+		_canCompile = true;
+	}
+	else _canCompile = false;
 
 	_pBinder = new Binder(_pStmt);
 	_pExtractor = new Extractor(_pStmt);
@@ -150,8 +150,6 @@ bool SQLiteStatementImpl::compileImpl()
 			_columns[curDataSet].push_back(mc);
 		}
 	}
-
-	return true;
 }
 
 
@@ -226,7 +224,6 @@ void SQLiteStatementImpl::clear()
 		_pStmt=0;
 	}
 	_pLeftover = 0;
-	_canBind = false;
 }
 
 

Data/include/Poco/Data/StatementImpl.h

@@ -198,18 +198,13 @@ protected:
 		/// Expects the statement to be compiled and bound.
 
 	virtual bool canBind() const = 0;
-		/// Returns if another bind is possible.
+		/// Returns true if another bind is possible.
 
-	virtual bool compileImpl() = 0;
+	virtual bool canCompile() const = 0;
+		/// Returns true if another compile is possible.
+
+	virtual void compileImpl() = 0;
 		/// Compiles the statement, doesn't bind yet.
-		/// Returns true if compilation was succesful.
-		/// This function will be called at least twice, so
-		/// for connectors requiring one call only, this function
-		/// should always return false and internall protect itself
-		/// against multiple calls.
-		/// This design is to conform to the connectors (e.g. SQLite)
-		/// that handle batches of statements as a sequence of independent
-		/// statements, each with its own prepare/bind/execute operations.
 
 	virtual void bindImpl() = 0;
 		/// Binds parameters.
@@ -304,9 +299,8 @@ protected:
 		/// Returns the extraction limit.
 
 private:
-	bool compile();
-		/// Compiles the statement, if not yet compiled.
-		/// Returns true if more compile calls are needed.
+	void compile();
+		/// Compiles the statement.
 
 	void bind();
 		/// Binds the statement, if not yet bound.

Data/src/StatementImpl.cpp

@@ -87,14 +87,14 @@ Poco::UInt32 StatementImpl::execute()
 	if (_lowerLimit > _extrLimit.value())
 		throw LimitException("Illegal Statement state. Upper limit must not be smaller than the lower limit.");
 
-	compile();
 	do
 	{
+		compile();
 		if (_extrLimit.value() == Limit::LIMIT_UNLIMITED)
 			lim += executeWithoutLimit();
 		else
 			lim += executeWithLimit();
-	} while (compile());
+	} while (canCompile());
 
 	if (_extrLimit.value() == Limit::LIMIT_UNLIMITED)
 		_state = ST_DONE;
@@ -145,15 +145,13 @@ Poco::UInt32 StatementImpl::executeWithoutLimit()
 }
 
 
-bool StatementImpl::compile()
+void StatementImpl::compile()
 {
-	bool retval = false;
-
 	if (_state == ST_INITIALIZED || 
 		_state == ST_RESET || 
 		_state == ST_BOUND)
 	{
-		retval = compileImpl();
+		compileImpl();
 		_state = ST_COMPILED;
 
 		if (!extractions().size() && !isStoredProcedure())
@@ -165,8 +163,6 @@ bool StatementImpl::compile()
 		fixupExtraction();
 		fixupBinding();
 	}
-
-	return retval;
 }
 
 

Data/testsuite/src/TestStatementImpl.cpp

@@ -40,7 +40,8 @@ namespace Test {
 
 
 TestStatementImpl::TestStatementImpl(SessionImpl& rSession):
-	Poco::Data::StatementImpl(rSession)
+	Poco::Data::StatementImpl(rSession),
+	_compiled(false)
 {
 }
 
@@ -50,13 +51,13 @@ TestStatementImpl::~TestStatementImpl()
 }
 
 
-bool TestStatementImpl::compileImpl()
+void TestStatementImpl::compileImpl()
 {
 	// prepare binding
 	_ptrBinder    = new Binder;
 	_ptrExtractor = new Extractor;
 	_ptrPrepare   = new Preparation;
-	return false;
+	_compiled = true;
 }
 
 

Data/testsuite/src/TestStatementImpl.h

@@ -83,7 +83,10 @@ protected:
 	bool canBind() const;
 		/// Returns true if a valid statement is set and we can bind.
 
-	bool compileImpl();
+	bool canCompile() const;
+		/// Returns true if statement was not compiled.
+
+	void compileImpl();
 		/// Compiles the statement, doesn't bind yet
 
 	void bindImpl();
@@ -96,9 +99,10 @@ protected:
 		/// Returns the concrete binder used by the statement.
 
 private:
-	Poco::SharedPtr<Binder>    _ptrBinder;
-	Poco::SharedPtr<Extractor> _ptrExtractor;
+	Poco::SharedPtr<Binder>      _ptrBinder;
+	Poco::SharedPtr<Extractor>   _ptrExtractor;
 	Poco::SharedPtr<Preparation> _ptrPrepare;
+	bool                         _compiled; 
 };
 
 
@@ -123,6 +127,12 @@ inline Poco::UInt32 TestStatementImpl::affectedRowCount() const
 }
 
 
+inline bool TestStatementImpl::canCompile() const
+{
+	return !_compiled;
+}
+
+
 } } } // namespace Poco::Data::Test