// Executes a statement and ignores its result.
private void ExecuteStatement(Sqlite3.Vdbe pStmt)
{
int cols;
IntPtr pazValue, pazColName;
ExecuteStatement(pStmt, out cols, out pazValue, out pazColName);
}
private void GetNextStatement(string pzStart, ref string pzTail, ref Sqlite3.Vdbe pStmt)
{
SQLiteError err = (SQLiteError)Sqlite3.sqlite3_prepare_v2(parent_conn.Handle2, pzStart, pzStart.Length, ref pStmt, ref pzTail);
if (err != SQLiteError.OK)
{
throw new SQLiteSyntaxException(parent_conn.Handle2.errCode, GetError3());
}
}
internal SQLiteDataReader(SQLiteCommand cmd, Sqlite3.Vdbe pVm, int version)
{
command = cmd;
rows = new List <object[]>();
column_names_sens = new Dictionary <String, Object>();
column_names_insens = new Dictionary <String, Object>(StringComparer.InvariantCultureIgnoreCase);
closed = false;
current_row = -1;
reading = true;
ReadpVm(pVm, version, cmd);
ReadingDone();
}
// Executes a statement and returns whether there is more data available.
internal bool ExecuteStatement(Sqlite3.Vdbe pStmt, out int cols, out IntPtr pazValue, out IntPtr pazColName)
{
SQLiteError err;
//if (parent_conn.Version == 3)
//{
err = (SQLiteError)Sqlite3.sqlite3_step(pStmt);
if (err == SQLiteError.ERROR)
{
throw new SQLiteExecutionException(parent_conn.Handle2.errCode, GetError3() + "\n" + pStmt.zErrMsg);
}
pazValue = IntPtr.Zero;
pazColName = IntPtr.Zero; // not used for v=3
cols = Sqlite3.sqlite3_column_count(pStmt);
/*
* }
* else
* {
* err = (SqliteError)Sqlite3.sqlite3_step(pStmt, out cols, out pazValue, out pazColName);
* if (err == SqliteError.ERROR)
* throw new SqliteExecutionException ();
* }
*/
if (err == SQLiteError.BUSY)
{
throw new SQLiteBusyException();
}
if (err == SQLiteError.MISUSE)
{
throw new SQLiteExecutionException();
}
if (err == SQLiteError.CONSTRAINT)
{
throw new SQLiteException(parent_conn.Handle2.errCode, GetError3() + "\n" + pStmt.zErrMsg);
}
if (err == SQLiteError.MISMATCH)
{
throw new SQLiteException(parent_conn.Handle2.errCode, GetError3() + "\n" + pStmt.zErrMsg);
}
// err is either ROW or DONE.
return(err == SQLiteError.ROW);
}
internal void ReadpVm(Sqlite3.Vdbe pVm, int version, SQLiteCommand cmd)
{
int pN;
IntPtr pazValue;
IntPtr pazColName;
bool first = true;
DeclaredMode[] declmode = null;
while (true)
{
bool hasdata = cmd.ExecuteStatement(pVm, out pN, out pazValue, out pazColName);
// For the first row, get the column information
if (first)
{
first = false;
if (version == 3)
{
// A decltype might be null if the type is unknown to sqlite.
decltypes = new string[pN];
declmode = new DeclaredMode[pN]; // 1 == integer, 2 == datetime
for (int i = 0; i < pN; i++)
{
string decl = Sqlite3.sqlite3_column_decltype(pVm, i);
if (decl != null)
{
decltypes[i] = decl.ToLower(System.Globalization.CultureInfo.InvariantCulture);
if (decltypes[i] == "int" || decltypes[i] == "integer")
{
declmode[i] = DeclaredMode.Integer;
}
else if (decltypes[i] == "date" || decltypes[i] == "datetime")
{
declmode[i] = DeclaredMode.DateTime;
}
else if (decltypes[i] == "uniqueidentifier" || decltypes[i] == "guid")
{
declmode[i] = DeclaredMode.Guid;
}
}
}
}
columns = new string[pN];
for (int i = 0; i < pN; i++)
{
string colName;
//if (version == 2) {
// IntPtr fieldPtr = Marshal.ReadIntPtr (pazColName, i*IntPtr.Size);
// colName = Sqlite.HeapToString (fieldPtr, ((SqliteConnection)cmd.Connection).Encoding);
//} else {
colName = Sqlite3.sqlite3_column_name(pVm, i);
//}
columns[i] = colName;
column_names_sens[colName] = i;
column_names_insens[colName] = i;
}
}
if (!hasdata)
{
break;
}
object[] data_row = new object[pN];
for (int i = 0; i < pN; i++)
{
switch (Sqlite3.sqlite3_column_type(pVm, i))
{
case 1:
long val = Sqlite3.sqlite3_column_int64(pVm, i);
// If the column was declared as an 'int' or 'integer' OR the type of column is unknown
// let's play nice and return an int (version 3 only).
if ((declmode[i] == DeclaredMode.Integer || decltypes[i] == null) && val >= int.MinValue && val <= int.MaxValue)
{
data_row[i] = (int)val;
}
// Or if it was declared a date or datetime, do the reverse of what we
// do for DateTime parameters.
else if (declmode[i] == DeclaredMode.DateTime)
{
data_row[i] = DateTime.FromFileTime(val);
}
else
{
data_row[i] = val;
}
break;
case 2:
data_row[i] = Sqlite3.sqlite3_column_double(pVm, i);
break;
case 3:
data_row[i] = Sqlite3.sqlite3_column_text(pVm, i);
// If the column was declared as a 'date' or 'datetime', let's play
// nice and return a DateTime (version 3 only).
if (declmode[i] == DeclaredMode.DateTime)
{
if (data_row[i] == null)
{
data_row[i] = null;
}
else
{
data_row[i] = DateTime.Parse((string)data_row[i], System.Globalization.CultureInfo.InvariantCulture);
}
}
else if (declmode[i] == DeclaredMode.Guid)
{
Guid g;
if (data_row[i] == null)
{
data_row[i] = null;
}
else if (Guid.TryParse((string)data_row[i], out g))
{
data_row[i] = g;
}
}
break;
case 4:
byte[] blob = Sqlite3.sqlite3_column_blob(pVm, i);
data_row[i] = blob;
break;
case 5:
data_row[i] = null;
break;
default:
throw new Exception("FATAL: Unknown sqlite3_column_type");
}
}
rows.Add(data_row);
}
}
public SQLiteDataReader ExecuteReader(CommandBehavior behavior, bool want_results, out int rows_affected)
{
Prepare();
// The SQL string may contain multiple sql commands, so the main
// thing to do is have Sqlite iterate through the commands.
// If want_results, only the last command is returned as a
// DataReader. Otherwise, no command is returned as a
// DataReader.
//IntPtr psql; // pointer to SQL command
// Sqlite 2 docs say this: By default, SQLite assumes that all data uses a fixed-size 8-bit
// character (iso8859). But if you give the --enable-utf8 option to the configure script, then the
// library assumes UTF-8 variable sized characters. This makes a difference for the LIKE and GLOB
// operators and the LENGTH() and SUBSTR() functions. The static string sqlite_encoding will be set
// to either "UTF-8" or "iso8859" to indicate how the library was compiled. In addition, the sqlite.h
// header file will define one of the macros SQLITE_UTF8 or SQLITE_ISO8859, as appropriate.
//
// We have no way of knowing whether Sqlite 2 expects ISO8859 or UTF-8, but ISO8859 seems to be the
// default. Therefore, we need to use an ISO8859(-1) compatible encoding, like ANSI.
// OTOH, the user may want to specify the encoding of the bytes stored in the database, regardless
// of what Sqlite is treating them as,
// For Sqlite 3, we use the UTF-16 prepare function, so we need a UTF-16 string.
/*
* if (parent_conn.Version == 2)
* psql = Sqlite.StringToHeap (sql.Trim(), parent_conn.Encoding);
* else
* psql = Marshal.StringToHGlobalUni (sql.Trim());
*/
string queryval = sql.Trim();
string pzTail = sql.Trim();
IntPtr errMsgPtr;
parent_conn.StartExec();
rows_affected = 0;
try
{
while (true)
{
Sqlite3.Vdbe pStmt = null;
queryval = pzTail;
GetNextStatement(queryval, ref pzTail, ref pStmt);
if (pStmt == null)
{
throw new Exception();
}
// pzTail is positioned after the last byte in the
// statement, which will be the NULL character if
// this was the last statement.
bool last = pzTail.Length == 0;
try
{
if (parent_conn.Version == 3)
{
BindParameters3(pStmt);
}
if (last && want_results)
{
return(new SQLiteDataReader(this, pStmt, parent_conn.Version));
}
ExecuteStatement(pStmt);
if (last) // rows_affected is only used if !want_results
{
rows_affected = NumChanges();
}
}
finally
{
//if (parent_conn.Version == 3)
Sqlite3.sqlite3_finalize(pStmt);
//else
// Sqlite.sqlite_finalize (pStmt, out errMsgPtr);
}
if (last)
{
break;
}
}
return(null);
}
//alxwest: Console.WriteLine in shared functionality.
//catch ( Exception ex )
//{
// Console.WriteLine( ex.Message );
// return null;
//}
finally
{
parent_conn.EndExec();
//Marshal.FreeHGlobal (psql);
}
}
private void BindParameters3(Sqlite3.Vdbe pStmt)
{
if (sql_params == null)
{
return;
}
if (sql_params.Count == 0)
{
return;
}
int pcount = Sqlite3.sqlite3_bind_parameter_count(pStmt);
for (int i = 1; i <= pcount; i++)
{
String name = Sqlite3.sqlite3_bind_parameter_name(pStmt, i);
SQLiteParameter param = null;
if (!String.IsNullOrEmpty(name))
{
param = sql_params[name] as SQLiteParameter;
}
else
{
param = sql_params[i - 1] as SQLiteParameter;
}
if (param.Value == null)
{
Sqlite3.sqlite3_bind_null(pStmt, i);
continue;
}
Type ptype = param.Value.GetType();
if (ptype.IsEnum)
{
ptype = Enum.GetUnderlyingType(ptype);
}
SQLiteError err;
if (ptype.Equals(typeof(String)))
{
String s = (String)param.Value;
err = (SQLiteError)Sqlite3.sqlite3_bind_text(pStmt, i, s, -1, null);
}
else if (ptype.Equals(typeof(DBNull)))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_null(pStmt, i);
}
else if (ptype.Equals(typeof(Boolean)))
{
bool b = (bool)param.Value;
err = (SQLiteError)Sqlite3.sqlite3_bind_int(pStmt, i, b ? 1 : 0);
}
else if (ptype.Equals(typeof(Byte)))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_int(pStmt, i, (Byte)param.Value);
}
else if (ptype.Equals(typeof(Char)))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_int(pStmt, i, (Char)param.Value);
}
else if (ptype.IsEnum)
{
err = (SQLiteError)Sqlite3.sqlite3_bind_int(pStmt, i, (Int32)param.Value);
}
else if (ptype.Equals(typeof(Int16)))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_int(pStmt, i, (Int16)param.Value);
}
else if (ptype.Equals(typeof(Int32)))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_int(pStmt, i, (Int32)param.Value);
}
else if (ptype.Equals(typeof(SByte)))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_int(pStmt, i, (SByte)param.Value);
}
else if (ptype.Equals(typeof(UInt16)))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_int(pStmt, i, (UInt16)param.Value);
}
else if (ptype.Equals(typeof(DateTime)))
{
DateTime dt = (DateTime)param.Value;
err = (SQLiteError)Sqlite3.sqlite3_bind_text(pStmt, i, dt.ToString("yyyy-MM-dd HH:mm:ss.fff"), -1, null);
}
else if (ptype.Equals(typeof(Decimal)))
{
string val = ((Decimal)param.Value).ToString(CultureInfo.InvariantCulture);
err = (SQLiteError)Sqlite3.sqlite3_bind_text(pStmt, i, val, val.Length, null);
}
else if (ptype.Equals(typeof(Double)))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_double(pStmt, i, (Double)param.Value);
}
else if (ptype.Equals(typeof(Single)))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_double(pStmt, i, (Single)param.Value);
}
else if (ptype.Equals(typeof(UInt32)))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_int64(pStmt, i, (UInt32)param.Value);
}
else if (ptype.Equals(typeof(Int64)))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_int64(pStmt, i, (Int64)param.Value);
}
else if (ptype.Equals(typeof(Byte[])))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_blob(pStmt, i, (byte[])param.Value, ((byte[])param.Value).Length, null);
}
else if (ptype.Equals(typeof(Guid)))
{
err = (SQLiteError)Sqlite3.sqlite3_bind_text(pStmt, i, param.Value.ToString(), param.Value.ToString().Length, null);
}
else
{
throw new ApplicationException("Unkown Parameter Type");
}
if (err != SQLiteError.OK)
{
throw new ApplicationException("Sqlite error in bind " + err);
}
}
}
