抛弃GdCpp*.dll/pdb历史重新建库。libhv和Sqlite的dll保留
This commit is contained in:
Zhang Jianjun
734
include/CSQLite/CSQLiteStatement.h
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734
include/CSQLite/CSQLiteStatement.h
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@@ -0,0 +1,734 @@
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/**
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* @file CSQLiteStatement.h
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* @ingroup CSQLite
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* @brief A prepared SQLite Statement is a compiled SQL query ready to be executed, pointing to a row of result.
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*
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修改自SQLiteCPP的Statement类。
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1. Ptr类改用_Statemen和QSharedPointer<_Statement>实现
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2. 增加errCode和errMsg保存错误信息
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3. 增加不同数据类型的tryBind()，不抛出异常，出错生成errCode和errMsg
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4. Bind类函数改成用模板函数实现index版和列名称版两套函数
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5. Column相关的函数去掉了checkRow()/checkIndex(aIndex)判断和抛出异常，由调用者确保有记录并且index不超界;
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6. bind一个u32型数据内部转成int，适用于不需要排序的u32列。如果需要排序，强制转成int64再bind
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*/
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#pragma once
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#include "CSQLiteException.h"
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#include "CSQLiteColumn.h"
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#include <climits> // For INT_MAX
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#include <map>
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#include "_Statement.h"
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#include "CSQLiteColumn.h"
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#include "GdCPP_Exports.h"
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#pragma comment(lib, "sqlite3.lib")
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// Forward declaration
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class CSQLiteDB;
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/**
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* @brief RAII encapsulation of a prepared SQLite Statement.
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*
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* A Statement is a compiled SQL query ready to be executed step by step
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* to provide results one row at a time.
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*
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* Resource Acquisition Is Initialization (RAII) means that the Statement
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* is compiled in the constructor and finalized in the destructor, so that there is
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* no need to worry about memory management or the validity of the underlying SQLite Statement.
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*
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* Thread-safety: a Statement object shall not be shared by multiple threads, because :
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* 1) in the SQLite "Thread Safe" mode, "SQLite can be safely used by multiple threads
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* provided that no single database connection is used simultaneously in two or more threads."
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* 2) the SQLite "Serialized" mode is not supported by SQLiteC++,
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* because of the way it shares the underling SQLite precompiled statement
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* in a custom shared pointer (See the inner class "Statement::Ptr").
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*/
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class GDCPP_API CSQLiteStatement
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{
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// friend class CSQLiteColumn; // For access to inner member
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public:
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/**
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* @brief Compile and register the SQL query for the provided SQLite Database Connection
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*
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* @param[in] aDatabase the SQLite Database Connection
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* @param[in] apQuery an UTF-8 encoded query string
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*
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* Exception is thrown in case of error, then the Statement object is NOT constructed.
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*/
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CSQLiteStatement(CSQLiteDB& aDatabase, const char* apQuery);
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/**
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* @brief Compile and register the SQL query for the provided SQLite Database Connection
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*
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* @param[in] aDatabase the SQLite Database Connection
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* @param[in] aQuery an UTF-8 encoded query string
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*
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* Exception is thrown in case of error, then the Statement object is NOT constructed.
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*/
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CSQLiteStatement(CSQLiteDB& aDatabase, const std::string& aQuery);
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/**
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* @brief Move an SQLite statement.
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*
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* @param[in] aStatement Statement to move
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*/
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CSQLiteStatement(CSQLiteStatement&& aStatement) noexcept;
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/// Finalize and unregister the SQL query from the SQLite Database Connection.
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~CSQLiteStatement();
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/// Reset the statement to make it ready for a new execution. Throws an exception on error.
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inline void reset()
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{
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const int ret = tryReset();
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check(ret);
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}
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/// Reset the statement. Returns the sqlite result code instead of throwing an exception on error.
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inline int tryReset() noexcept
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{
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mbHasRow = false;
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mbDone = false;
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return sqlite3_reset(*mStmtPtr);
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}
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/**
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* @brief Clears away all the bindings of a prepared statement.
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*
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* Contrary to the intuition of many, reset() does not reset the bindings on a prepared statement.
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* Use this routine to reset all parameters to NULL.
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*/
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inline void clearBindings() // throw(SQLite::Exception)
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{
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const int ret = sqlite3_clear_bindings(*mStmtPtr);
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check(ret);
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}
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////////////////////////////////////////////////////////////////////////////
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// Bind a value to a parameter of the SQL statement,
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// in the form "?" (unnamed), "?NNN", ":VVV", "@VVV" or "$VVV".
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//
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// Can use the parameter index, starting from "1", to the higher NNN value,
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// or the complete parameter name "?NNN", ":VVV", "@VVV" or "$VVV"
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// (prefixed with the corresponding sign "?", ":", "@" or "$")
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//
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// Note that for text and blob values, the SQLITE_TRANSIENT flag is used,
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// which tell the sqlite library to make its own copy of the data before the bind() call returns.
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// This choice is done to prevent any common misuses, like passing a pointer to a
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// dynamic allocated and temporary variable (a std::string for instance).
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// This is under-optimized for static data (a static text define in code)
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// as well as for dynamic allocated buffer which could be transfer to sqlite
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// instead of being copied.
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// => if you know what you are doing, use bindNoCopy() instead of bind()
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/**
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* @brief Bind an int value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
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*/
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inline int tryBind(const int aIndex, const int aValue)
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{
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errCode = sqlite3_bind_int(*mStmtPtr, aIndex, aValue);
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if (SQLITE_OK != errCode)
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{
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errMsg ="Fail to bind index ";
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errMsg += std::to_string(aIndex);
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errMsg += " with int value ";
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errMsg += std::to_string(aValue);
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errMsg += ", errCode=";
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errMsg += std::to_string(errCode);
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}
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return errCode;
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}
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/**
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* @brief Bind a 32bits unsigned int value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
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*/
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inline int tryBind(const int aIndex, const unsigned aValue)
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{
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errCode = sqlite3_bind_int(*mStmtPtr, aIndex, int(aValue));
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if (SQLITE_OK != errCode)
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{
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errMsg ="Fail to bind index ";
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errMsg += std::to_string(aIndex);
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errMsg += " with uint value ";
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errMsg += std::to_string(aValue);
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errMsg += ", errCode=";
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errMsg += std::to_string(errCode);
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}
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return errCode;
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}
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/**
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* @brief Bind a 64bits int value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
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*/
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inline int tryBind(const int aIndex, const int64_t aValue)
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{
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errCode = sqlite3_bind_int64(*mStmtPtr, aIndex, aValue);
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if (SQLITE_OK != errCode)
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{
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errMsg ="Fail to bind index ";
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errMsg += std::to_string(aIndex);
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errMsg += " with int64_t value ";
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errMsg += std::to_string(aValue);
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errMsg += ", errCode=";
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errMsg += std::to_string(errCode);
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}
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return errCode;
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}
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/**
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* @brief Bind a double (64bits float) value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
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*/
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inline int tryBind(const int aIndex, const double aValue)
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{
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errCode = sqlite3_bind_double(*mStmtPtr, aIndex, aValue);
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if (SQLITE_OK != errCode)
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{
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errMsg ="Fail to bind index ";
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errMsg += std::to_string(aIndex);
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errMsg += " with double value ";
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errMsg += std::to_string(aValue);
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errMsg += ", errCode=";
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errMsg += std::to_string(errCode);
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}
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return errCode;
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}
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/**
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* @brief Bind a string value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
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*
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* @note Uses the SQLITE_TRANSIENT flag, making a copy of the data, for SQLite internal use
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*/
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inline int tryBind(const int aIndex, const std::string& aValue)
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{
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errCode = sqlite3_bind_text(*mStmtPtr, aIndex, aValue.c_str(),
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static_cast<int>(aValue.size()), SQLITE_TRANSIENT);
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if (SQLITE_OK != errCode)
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{
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errMsg ="Fail to bind index ";
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errMsg += std::to_string(aIndex);
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errMsg += " with string ";
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errMsg += aValue;
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errMsg += ", errCode=";
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errMsg += std::to_string(errCode);
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}
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return errCode;
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}
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/**
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* @brief Bind a text value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
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*
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* @note Uses the SQLITE_TRANSIENT flag, making a copy of the data, for SQLite internal use
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*/
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inline int tryBind(const int aIndex, const char* apValue)
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{
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errCode = sqlite3_bind_text(*mStmtPtr, aIndex, apValue, -1, SQLITE_TRANSIENT);
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if (SQLITE_OK != errCode)
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{
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errMsg ="Fail to bind index ";
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errMsg += std::to_string(aIndex);
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errMsg += " with const char * ";
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errMsg += apValue;
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errMsg += ", errCode=";
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errMsg += std::to_string(errCode);
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}
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return errCode;
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}
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/**
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* @brief Bind a binary blob value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
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*
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* @note Uses the SQLITE_TRANSIENT flag, making a copy of the data, for SQLite internal use
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*/
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inline int tryBind(const int aIndex, const void* apValue, const int aSize)
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{
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errCode = sqlite3_bind_blob(*mStmtPtr, aIndex, apValue, aSize, SQLITE_TRANSIENT);
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if (SQLITE_OK != errCode)
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{
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errMsg ="Fail to bind index ";
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errMsg += std::to_string(aIndex);
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errMsg += " with blob ";
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// errMsg += std::to_string(aValue);
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errMsg += ", errCode=";
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errMsg += std::to_string(errCode);
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}
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return errCode;
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}
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/**
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* @brief Bind a string value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1).
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*
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* The string can contain null characters as it is binded using its size.
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*
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* @warning Uses the SQLITE_STATIC flag, avoiding a copy of the data. The string must remains unchanged while executing the statement.
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*/
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int tryBindNoCopy(const int aIndex, const std::string& aValue)
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{
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errCode = sqlite3_bind_text(*mStmtPtr, aIndex, aValue.c_str(),
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static_cast<int>(aValue.size()), SQLITE_STATIC);
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if (SQLITE_OK != errCode)
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{
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errMsg ="Fail to bindNoCopy index ";
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errMsg += std::to_string(aIndex);
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errMsg += " with string ";
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errMsg += aValue;
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errMsg += ", errCode=";
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errMsg += std::to_string(errCode);
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}
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return errCode;
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}
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/**
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* @brief Bind a text value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
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*
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* Main usage is with null-terminated literal text (aka in code static strings)
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*
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* @warning Uses the SQLITE_STATIC flag, avoiding a copy of the data. The string must remains unchanged while executing the statement.
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*/
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int tryBindNoCopy(const int aIndex, const char* apValue)
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{
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errCode = sqlite3_bind_text(*mStmtPtr, aIndex, apValue, -1, SQLITE_STATIC);
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if (SQLITE_OK != errCode)
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{
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errMsg ="Fail to bindNoCopy index ";
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errMsg += std::to_string(aIndex);
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errMsg += " with const char*: ";
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errMsg += apValue;
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errMsg += ", errCode=";
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errMsg += std::to_string(errCode);
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}
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return errCode;
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}
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/**
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* @brief Bind a binary blob value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
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*
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* @warning Uses the SQLITE_STATIC flag, avoiding a copy of the data. The string must remains unchanged while executing the statement.
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*/
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int tryBindNoCopy(const int aIndex, const void* apValue, const int aSize)
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{
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errCode = sqlite3_bind_blob(*mStmtPtr, aIndex, apValue, aSize, SQLITE_STATIC);
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if (SQLITE_OK != errCode)
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{
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errMsg ="Fail to bindNoCopy blob to index ";
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errMsg += std::to_string(aIndex);
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errMsg += " with void *, size ";
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errMsg += std::to_string(aSize);
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errMsg += ", errCode=";
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errMsg += std::to_string(errCode);
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}
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return errCode;
|
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}
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template<typename T>
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inline void bind(const int aIndex, T aValue)
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{
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const int ret = tryBind(aIndex, aValue);
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if (SQLITE_OK != ret)
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{
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throw CSQLiteException(errMsg);
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}
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}
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|
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template<typename T>
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inline void bindNoCopy(const int aIndex, T aValue)
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{
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const int ret = tryBindNoCopy(aIndex, aValue);
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if (SQLITE_OK != ret)
|
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{
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throw CSQLiteException(errMsg);
|
||||
}
|
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}
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template<typename T>
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inline void bind(const char* apName, T aValue)
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{
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const int index = sqlite3_bind_parameter_index(*mStmtPtr, apName);
|
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if(index==0){
|
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std::string errstr("sqlite3_bind_parameter_index fail for ");
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errstr += apName;
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throw CSQLiteException(errstr);
|
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}
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bind(index, aValue);
|
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}
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template<typename T>
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inline void bindNoCopy(const char* apName, T aValue)
|
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{
|
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const int index = sqlite3_bind_parameter_index(*mStmtPtr, apName);
|
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if(index==0){
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std::string errstr("sqlite3_bind_parameter_index fail for ");
|
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errstr += apName;
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throw CSQLiteException(errstr);
|
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}
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bind(index, aValue);
|
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}
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template<typename T>
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inline void bind(const std::string& aName, T aValue)
|
||||
{
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bind(aName.c_str(), aValue);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Bind a NULL value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
|
||||
*
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||||
* @see clearBindings() to set all bound parameters to NULL.
|
||||
*/
|
||||
inline void bindNull(const int aIndex)
|
||||
{
|
||||
const int ret = sqlite3_bind_null(*mStmtPtr, aIndex);
|
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check(ret);
|
||||
}
|
||||
inline void bindNull(const char* apName)
|
||||
{
|
||||
const int index = sqlite3_bind_parameter_index(*mStmtPtr, apName);
|
||||
if(index==0){
|
||||
std::string errstr("sqlite3_bind_parameter_index fail for ");
|
||||
errstr += apName;
|
||||
throw CSQLiteException(errstr);
|
||||
}
|
||||
bindNull(index);
|
||||
}
|
||||
inline void bindNull(const std::string& aName)
|
||||
{
|
||||
bindNull(aName.c_str());
|
||||
}
|
||||
|
||||
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
/**
|
||||
* @brief Execute a step of the prepared query to fetch one row of results.
|
||||
*
|
||||
* While true is returned, a row of results is available, and can be accessed
|
||||
* thru the getColumn() method
|
||||
*
|
||||
* @see exec() execute a one-step prepared statement with no expected result
|
||||
* @see tryExecuteStep() try to execute a step of the prepared query to fetch one row of results, returning the sqlite result code.
|
||||
* @see CSQLiteDB::exec() is a shortcut to execute one or multiple statements without results
|
||||
*
|
||||
* @return - true (SQLITE_ROW) if there is another row ready : you can call getColumn(N) to get it
|
||||
* then you have to call executeStep() again to fetch more rows until the query is finished
|
||||
* - false (SQLITE_DONE) if the query has finished executing : there is no (more) row of result
|
||||
* (case of a query with no result, or after N rows fetched successfully)
|
||||
*
|
||||
* @throw SQLite::Exception in case of error
|
||||
*/
|
||||
bool executeStep();
|
||||
|
||||
/**
|
||||
* @brief Try to execute a step of the prepared query to fetch one row of results, returning the sqlite result code.
|
||||
*
|
||||
*
|
||||
*
|
||||
* @see exec() execute a one-step prepared statement with no expected result
|
||||
* @see executeStep() execute a step of the prepared query to fetch one row of results
|
||||
* @see CSQLiteDB::exec() is a shortcut to execute one or multiple statements without results
|
||||
*
|
||||
* @return the sqlite result code.
|
||||
*/
|
||||
int tryExecuteStep() noexcept;
|
||||
|
||||
/**
|
||||
* @brief Execute a one-step query with no expected result.
|
||||
*
|
||||
* This method is useful for any kind of statements other than the Data Query Language (DQL) "SELECT" :
|
||||
* - Data Definition Language (DDL) statements "CREATE", "ALTER" and "DROP"
|
||||
* - Data Manipulation Language (DML) statements "INSERT", "UPDATE" and "DELETE"
|
||||
* - Data Control Language (DCL) statements "GRANT", "REVOKE", "COMMIT" and "ROLLBACK"
|
||||
*
|
||||
* It is similar to CSQLiteDB::exec(), but using a precompiled statement, it adds :
|
||||
* - the ability to bind() arguments to it (best way to insert data),
|
||||
* - reusing it allows for better performances (efficient for multiple insertion).
|
||||
*
|
||||
* @see executeStep() execute a step of the prepared query to fetch one row of results
|
||||
* @see tryExecuteStep() try to execute a step of the prepared query to fetch one row of results, returning the sqlite result code.
|
||||
* @see CSQLiteDB::exec() is a shortcut to execute one or multiple statements without results
|
||||
*
|
||||
* @return number of row modified by this SQL statement (INSERT, UPDATE or DELETE)
|
||||
*
|
||||
* @throw SQLite::Exception in case of error, or if row of results are returned !
|
||||
*/
|
||||
int exec();
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
/**
|
||||
* @brief Return a copy of the column data specified by its index
|
||||
*
|
||||
* Can be used to access the data of the current row of result when applicable,
|
||||
* while the executeStep() method returns true.
|
||||
*
|
||||
* Throw an exception if there is no row to return a Column from:
|
||||
* - if provided index is out of bound
|
||||
* - before any executeStep() call
|
||||
* - after the last executeStep() returned false
|
||||
* - after a reset() call
|
||||
*
|
||||
* Throw an exception if the specified index is out of the [0, getColumnCount()) range.
|
||||
*
|
||||
* @param[in] aIndex Index of the column, starting at 0
|
||||
*
|
||||
* @note This method is not const, reflecting the fact that the returned Column object will
|
||||
* share the ownership of the underlying sqlite3_stmt.
|
||||
*
|
||||
* @warning The resulting Column object must not be memorized "as-is".
|
||||
* Is is only a wrapper around the current result row, so it is only valid
|
||||
* while the row from the Statement remains valid, that is only until next executeStep() call.
|
||||
* Thus, you should instead extract immediately its data (getInt(), getText()...)
|
||||
* and use or copy this data for any later usage.
|
||||
*
|
||||
* 注意调用者必须保证有一行数据，且index在[0, getColumnCount())范围内.
|
||||
* 本类只想做简单的封装，不想到处抛出异常
|
||||
*/
|
||||
inline CSQLiteColumn getColumn(const int aIndex)
|
||||
{
|
||||
// checkRow();
|
||||
// checkIndex(aIndex);
|
||||
|
||||
// Share the Statement Object handle with the new Column created
|
||||
return CSQLiteColumn(mStmtPtr, aIndex);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Return a copy of the column data specified by its column name (less efficient than using an index)
|
||||
*
|
||||
* Can be used to access the data of the current row of result when applicable,
|
||||
* while the executeStep() method returns true.
|
||||
*
|
||||
* Throw an exception if there is no row to return a Column from :
|
||||
* - if provided name is not one of the aliased column names
|
||||
* - before any executeStep() call
|
||||
* - after the last executeStep() returned false
|
||||
* - after a reset() call
|
||||
*
|
||||
* Throw an exception if the specified name is not an on of the aliased name of the columns in the result.
|
||||
*
|
||||
* @param[in] apName Aliased name of the column, that is, the named specified in the query (not the original name)
|
||||
*
|
||||
* @note Uses a map of column names to indexes, build on first call.
|
||||
*
|
||||
* @note This method is not const, reflecting the fact that the returned Column object will
|
||||
* share the ownership of the underlying sqlite3_stmt.
|
||||
*
|
||||
* @warning The resulting Column object must not be memorized "as-is".
|
||||
* Is is only a wrapper around the current result row, so it is only valid
|
||||
* while the row from the Statement remains valid, that is only until next executeStep() call.
|
||||
* Thus, you should instead extract immediately its data (getInt(), getText()...)
|
||||
* and use or copy this data for any later usage.
|
||||
*
|
||||
* Throw an exception if the specified name is not one of the aliased name of the columns in the result.
|
||||
* 注意调用者必须保证有一行数据，且名称是有效的.
|
||||
* 本类只想做简单的封装，不想到处抛出异常
|
||||
*/
|
||||
inline CSQLiteColumn getColumn(const char* apName)
|
||||
{
|
||||
// checkRow();
|
||||
const int index = getColumnIndex(apName); //注意名字不对会抛异常
|
||||
|
||||
// Share the Statement Object handle with the new Column created
|
||||
return CSQLiteColumn(mStmtPtr, index);
|
||||
}
|
||||
|
||||
#if __cplusplus >= 201402L || (defined(_MSC_VER) && _MSC_VER >= 1900)
|
||||
/**
|
||||
* @brief Return an instance of T constructed from copies of the first N columns
|
||||
*
|
||||
* Can be used to access the data of the current row of result when applicable,
|
||||
* while the executeStep() method returns true.
|
||||
*
|
||||
* Throw an exception if there is no row to return a Column from:
|
||||
* - if provided column count is out of bound
|
||||
* - before any executeStep() call
|
||||
* - after the last executeStep() returned false
|
||||
* - after a reset() call
|
||||
*
|
||||
* Throw an exception if the specified column count is out of the [0, getColumnCount()) range.
|
||||
*
|
||||
* @tparam T Object type to construct
|
||||
* @tparam N Number of columns
|
||||
*
|
||||
* @note Requires std=C++14
|
||||
*/
|
||||
template<typename T, int N>
|
||||
T getColumns();
|
||||
|
||||
private:
|
||||
/**
|
||||
* @brief Helper function used by getColumns<typename T, int N> to expand an integer_sequence used to generate
|
||||
* the required Column objects
|
||||
*/
|
||||
template<typename T, const int... Is>
|
||||
T getColumns(const std::integer_sequence<int, Is...>);
|
||||
|
||||
public:
|
||||
#endif
|
||||
|
||||
/**
|
||||
* @brief Test if the column value is NULL
|
||||
*
|
||||
* @param[in] aIndex Index of the column, starting at 0
|
||||
*
|
||||
* @return true if the column value is NULL
|
||||
*
|
||||
* 注意调用者必须保证有一行数据，且index在[0, getColumnCount())范围内，避免抛出异常
|
||||
*/
|
||||
bool isColumnNull(const int aIndex) const
|
||||
{
|
||||
// checkRow();
|
||||
// checkIndex(aIndex);
|
||||
return (SQLITE_NULL == sqlite3_column_type(*mStmtPtr, aIndex));
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Test if the column value is NULL
|
||||
*
|
||||
* @param[in] apName Aliased name of the column, that is, the named specified in the query (not the original name)
|
||||
*
|
||||
* @return true if the column value is NULL
|
||||
*
|
||||
* 注意调用者必须保证有一行数据，且列名称是有效的，避免抛出异常
|
||||
*/
|
||||
bool isColumnNull(const char* apName) const
|
||||
{
|
||||
// checkRow();
|
||||
const int index = getColumnIndex(apName); //
|
||||
return (SQLITE_NULL == sqlite3_column_type(*mStmtPtr, index));
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* @brief Return a pointer to the named assigned to the specified result column (potentially aliased)
|
||||
*
|
||||
* @param[in] aIndex Index of the column in the range [0, getColumnCount()).
|
||||
*
|
||||
* @see getColumnOriginName() to get original column name (not aliased)
|
||||
*
|
||||
* Throw an exception if the specified index is out of the [0, getColumnCount()) range.
|
||||
*/
|
||||
const char* getColumnName(const int aIndex) const;
|
||||
|
||||
#ifdef SQLITE_ENABLE_COLUMN_METADATA
|
||||
/**
|
||||
* @brief Return a pointer to the table column name that is the origin of the specified result column
|
||||
*
|
||||
* Require definition of the SQLITE_ENABLE_COLUMN_METADATA preprocessor macro :
|
||||
* - when building the SQLite library itself (which is the case for the Debian libsqlite3 binary for instance),
|
||||
* - and also when compiling this wrapper.
|
||||
*
|
||||
* Throw an exception if the specified index is out of the [0, getColumnCount()) range.
|
||||
*/
|
||||
const char* getColumnOriginName(const int aIndex) const;
|
||||
#endif
|
||||
|
||||
/**
|
||||
* @brief Return the index of the specified (potentially aliased) column name
|
||||
*
|
||||
* @param[in] apName Aliased name of the column, that is, the named specified in the query (not the original name)
|
||||
*
|
||||
* @note Uses a map of column names to indexes, build on first call.
|
||||
*
|
||||
* Throw an exception if the specified name is not known.
|
||||
*/
|
||||
int getColumnIndex(const char* apName) const;
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
/// Return the UTF-8 SQL Query.
|
||||
inline const std::string& getQuery() const
|
||||
{
|
||||
return mQuery;
|
||||
}
|
||||
|
||||
// Return a UTF-8 string containing the SQL text of prepared statement with bound parameters expanded.
|
||||
std::string getExpandedSQL();
|
||||
|
||||
/// Return the number of columns in the result set returned by the prepared statement
|
||||
inline int getColumnCount() const
|
||||
{
|
||||
return mColumnCount;
|
||||
}
|
||||
/// true when a row has been fetched with executeStep()
|
||||
inline bool hasRow() const
|
||||
{
|
||||
return mbHasRow;
|
||||
}
|
||||
|
||||
/// true when the last executeStep() had no more row to fetch
|
||||
inline bool isDone() const
|
||||
{
|
||||
return mbDone;
|
||||
}
|
||||
|
||||
inline bool isValid()
|
||||
{
|
||||
return bool(mStmtPtr);
|
||||
}
|
||||
|
||||
/// Return the number of bind parameters in the statement
|
||||
int getBindParameterCount() const noexcept;
|
||||
|
||||
/// Return the numeric result code for the most recent failed API call (if any).
|
||||
int getErrorCode() const noexcept; // nothrow
|
||||
/// Return the extended numeric result code for the most recent failed API call (if any).
|
||||
int getExtendedErrorCode() const noexcept; // nothrow
|
||||
/// Return UTF-8 encoded English language explanation of the most recent failed API call (if any).
|
||||
const char* getErrorMsg() const noexcept; // nothrow
|
||||
|
||||
int finalize() noexcept {
|
||||
return sqlite3_finalize(*mStmtPtr);
|
||||
}
|
||||
private:
|
||||
/// @{ CSQLiteStatement must be non-copyable
|
||||
CSQLiteStatement(const CSQLiteStatement&);
|
||||
CSQLiteStatement& operator=(const CSQLiteStatement&);
|
||||
/// @}
|
||||
|
||||
/**
|
||||
* @brief Check if a return code equals SQLITE_OK, else throw a SQLite::Exception with the SQLite error message
|
||||
*
|
||||
* @param[in] aRet SQLite return code to test against the SQLITE_OK expected value
|
||||
*/
|
||||
inline void check(const int aRet) const
|
||||
{
|
||||
if (SQLITE_OK != aRet)
|
||||
{
|
||||
throw CSQLiteException(*mStmtPtr, aRet);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Check if there is a row of result returned by executeStep(), else throw a SQLite::Exception.
|
||||
*/
|
||||
inline void checkRow() const
|
||||
{
|
||||
if (false == mbHasRow)
|
||||
{
|
||||
throw CSQLiteException("No row to get a column from. executeStep() was not called, or returned false.");
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Check if there is a Column index is in the range of columns in the result.
|
||||
*/
|
||||
inline void checkIndex(const int aIndex) const
|
||||
{
|
||||
if ((aIndex < 0) || (aIndex >= mColumnCount))
|
||||
{
|
||||
throw CSQLiteException("Column index out of range.");
|
||||
}
|
||||
}
|
||||
|
||||
private:
|
||||
/// Map of columns index by name (mutable so getColumnIndex can be const)
|
||||
typedef std::map<std::string, int> TColumnNames;
|
||||
|
||||
private:
|
||||
std::string mQuery; //!< UTF-8 SQL Query
|
||||
_StatementPtr mStmtPtr; //!< Shared Pointer to the prepared SQLite Statement Object
|
||||
int mColumnCount; //!< Number of columns in the result of the prepared statement
|
||||
mutable TColumnNames mColumnNames; //!< Map of columns index by name (mutable so getColumnIndex can be const)
|
||||
bool mbHasRow; //!< true when a row has been fetched with executeStep()
|
||||
bool mbDone; //!< true when the last executeStep() had no more row to fetch
|
||||
|
||||
public:
|
||||
int errCode;
|
||||
std::string errMsg;
|
||||
};
|
||||
|
||||
Reference in New Issue
Block a user