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Overview
| Comment: | Modify marshalling for the xUpdate method. More work on docs. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | virtualTables |
| Files: | files | file ages | folders |
| SHA1: |
7825b411c71113ca124cefb79650e5b2 |
| User & Date: | mistachkin 2013-06-25 02:06:33 |
Context
|
2013-06-25
| ||
| 04:17 | Add SQLiteNativeModule class. Revise table/cursor error handling methods of the SQLiteModule class to add the static variants of them. Rename the old CreateNativeModuleImpl method to GetNativeModuleImpl. Add new CreateNativeModuleImpl method that returns the default ISQLiteNativeModule implementation. More work on docs. check-in: c6554ef4c6 user: mistachkin tags: virtualTables | |
| 02:06 | Modify marshalling for the xUpdate method. More work on docs. check-in: 7825b411c7 user: mistachkin tags: virtualTables | |
| 01:25 | Fix several compilation errors and warnings. More work in progress on docs. check-in: d0f5ab8e16 user: mistachkin tags: virtualTables | |
Changes
Changes to System.Data.SQLite/SQLiteModule.cs.
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int argc,
IntPtr[] argv
);
///////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
/// <param name="pCursor">
/// The native pointer to the sqlite3_vtab_cursor derived structure.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
................................................................................
SQLiteErrorCode xNext(
IntPtr pCursor
);
///////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
/// <param name="pCursor">
/// The native pointer to the sqlite3_vtab_cursor derived structure.
/// </param>
/// <returns>
/// Non-zero if no more rows are available; zero otherwise.
/// </returns>
................................................................................
/// <summary>
/// The SQLite core invokes this method in order to find the value for
/// the N-th column of the current row. N is zero-based so the first
/// column is numbered 0. The xColumn method may return its result back
/// to SQLite using one of the following interface:
///
/// * sqlite3_result_blob()
/// * sqlite3_result_double()
/// * sqlite3_result_int()
/// * sqlite3_result_int64()
/// * sqlite3_result_null()
/// * sqlite3_result_text()
/// * sqlite3_result_text16()
/// * sqlite3_result_text16le()
/// * sqlite3_result_text16be()
/// * sqlite3_result_zeroblob()
///
/// If the xColumn method implementation calls none of the functions
/// above, then the value of the column defaults to an SQL NULL.
///
/// To raise an error, the xColumn method should use one of the
/// result_text() methods to set the error message text, then return an
/// appropriate error code. The xColumn method must return SQLITE_OK on
................................................................................
/// The xUpdate method is optional. If the xUpdate pointer in the
/// sqlite3_module for a virtual table is a NULL pointer, then the
/// virtual table is read-only.
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <param name="nData">
/// The number of new or modified column values contained in
/// <paramref name="apData" />.
/// </param>
/// <param name="apData">
///
/// </param>
/// <param name="rowId">
/// Upon success, this parameter must be modified to contain the unique
/// integer row identifier for the row that was inserted, if any.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
SQLiteErrorCode xUpdate(
IntPtr pVtab,
int nData,
IntPtr apData,
ref long rowId
);
///////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
................................................................................
SQLiteErrorCode xBegin(
IntPtr pVtab
);
///////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
................................................................................
SQLiteErrorCode xSync(
IntPtr pVtab
);
///////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
................................................................................
SQLiteErrorCode xCommit(
IntPtr pVtab
);
///////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
................................................................................
SQLiteErrorCode xRollback(
IntPtr pVtab
);
///////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <param name="nArg">
///
/// </param>
/// <param name="zName">
///
/// </param>
/// <param name="callback">
///
/// </param>
/// <param name="pClientData">
///
/// </param>
/// <returns>
///
/// </returns>
int xFindFunction(
IntPtr pVtab,
int nArg,
IntPtr zName,
ref SQLiteCallback callback,
ref IntPtr pClientData
);
///////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <param name="zNew">
/// The native pointer to the UTF-8 encoded string containing the new
/// name for the virtual table.
................................................................................
IntPtr pVtab,
IntPtr zNew
);
///////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <param name="iSavepoint">
///
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
SQLiteErrorCode xSavepoint(
IntPtr pVtab,
int iSavepoint
);
///////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <param name="iSavepoint">
///
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
SQLiteErrorCode xRelease(
IntPtr pVtab,
int iSavepoint
);
///////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <param name="iSavepoint">
///
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
SQLiteErrorCode xRollbackTo(
IntPtr pVtab,
int iSavepoint
................................................................................
return SQLiteErrorCode.Error;
}
///////////////////////////////////////////////////////////////////////
private SQLiteErrorCode xUpdate(
IntPtr pVtab,
int nData,
IntPtr apData,
ref long rowId
)
{
try
{
SQLiteVirtualTable table = TableFromIntPtr(pVtab);
if (table != null)
{
SQLiteValue[] values =
SQLiteMarshal.ValueArrayFromSizeAndIntPtr(
nData, apData);
return Update(table, values, ref rowId);
}
}
catch (Exception e) /* NOTE: Must catch ALL. */
{
SetTableError(pVtab, e.ToString());
}
|
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int argc,
IntPtr[] argv
);
///////////////////////////////////////////////////////////////////////
/// <summary>
/// The xNext method advances a virtual table cursor to the next row of
/// a result set initiated by xFilter. If the cursor is already
/// pointing at the last row when this routine is called, then the
/// cursor no longer points to valid data and a subsequent call to the
/// xEof method must return true (non-zero). If the cursor is
/// successfully advanced to another row of content, then subsequent
/// calls to xEof must return false (zero).
///
/// This method must return SQLITE_OK if successful, or an sqlite error
/// code if an error occurs.
///
/// The xNext method is required for every virtual table
/// implementation.
/// </summary>
/// <param name="pCursor">
/// The native pointer to the sqlite3_vtab_cursor derived structure.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
................................................................................
SQLiteErrorCode xNext(
IntPtr pCursor
);
///////////////////////////////////////////////////////////////////////
/// <summary>
/// The xEof method must return false (zero) if the specified cursor
/// currently points to a valid row of data, or true (non-zero)
/// otherwise. This method is called by the SQL engine immediately
/// after each xFilter and xNext invocation.
///
/// The xEof method is required for every virtual table implementation.
/// </summary>
/// <param name="pCursor">
/// The native pointer to the sqlite3_vtab_cursor derived structure.
/// </param>
/// <returns>
/// Non-zero if no more rows are available; zero otherwise.
/// </returns>
................................................................................
/// <summary>
/// The SQLite core invokes this method in order to find the value for
/// the N-th column of the current row. N is zero-based so the first
/// column is numbered 0. The xColumn method may return its result back
/// to SQLite using one of the following interface:
///
/// * sqlite3_result_blob()
/// * sqlite3_result_double()
/// * sqlite3_result_int()
/// * sqlite3_result_int64()
/// * sqlite3_result_null()
/// * sqlite3_result_text()
/// * sqlite3_result_text16()
/// * sqlite3_result_text16le()
/// * sqlite3_result_text16be()
/// * sqlite3_result_zeroblob()
///
/// If the xColumn method implementation calls none of the functions
/// above, then the value of the column defaults to an SQL NULL.
///
/// To raise an error, the xColumn method should use one of the
/// result_text() methods to set the error message text, then return an
/// appropriate error code. The xColumn method must return SQLITE_OK on
................................................................................
/// The xUpdate method is optional. If the xUpdate pointer in the
/// sqlite3_module for a virtual table is a NULL pointer, then the
/// virtual table is read-only.
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <param name="argc">
/// The number of new or modified column values contained in
/// <paramref name="argv" />.
/// </param>
/// <param name="argv">
/// The array of native pointers to sqlite3_value structures containing
/// the new or modified column values, if any.
/// </param>
/// <param name="rowId">
/// Upon success, this parameter must be modified to contain the unique
/// integer row identifier for the row that was inserted, if any.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
SQLiteErrorCode xUpdate(
IntPtr pVtab,
int argc,
IntPtr[] argv,
ref long rowId
);
///////////////////////////////////////////////////////////////////////
/// <summary>
/// This method begins a transaction on a virtual table. This is method
/// is optional. The xBegin pointer of sqlite3_module may be NULL.
///
/// This method is always followed by one call to either the xCommit or
/// xRollback method. Virtual table transactions do not nest, so the
/// xBegin method will not be invoked more than once on a single
/// virtual table without an intervening call to either xCommit or
/// xRollback. Multiple calls to other methods can and likely will
/// occur in between the xBegin and the corresponding xCommit or
/// xRollback.
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
................................................................................
SQLiteErrorCode xBegin(
IntPtr pVtab
);
///////////////////////////////////////////////////////////////////////
/// <summary>
/// This method signals the start of a two-phase commit on a virtual
/// table. This is method is optional. The xSync pointer of
/// sqlite3_module may be NULL.
///
/// This method is only invoked after call to the xBegin method and
/// prior to an xCommit or xRollback. In order to implement two-phase
/// commit, the xSync method on all virtual tables is invoked prior to
/// invoking the xCommit method on any virtual table. If any of the
/// xSync methods fail, the entire transaction is rolled back.
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
................................................................................
SQLiteErrorCode xSync(
IntPtr pVtab
);
///////////////////////////////////////////////////////////////////////
/// <summary>
/// This method causes a virtual table transaction to commit. This is
/// method is optional. The xCommit pointer of sqlite3_module may be
/// NULL.
///
/// A call to this method always follows a prior call to xBegin and
/// xSync.
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
................................................................................
SQLiteErrorCode xCommit(
IntPtr pVtab
);
///////////////////////////////////////////////////////////////////////
/// <summary>
/// This method causes a virtual table transaction to rollback. This is
/// method is optional. The xRollback pointer of sqlite3_module may be
/// NULL.
///
/// A call to this method always follows a prior call to xBegin.
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
................................................................................
SQLiteErrorCode xRollback(
IntPtr pVtab
);
///////////////////////////////////////////////////////////////////////
/// <summary>
/// This method provides notification that the virtual table
/// implementation that the virtual table will be given a new name. If
/// this method returns SQLITE_OK then SQLite renames the table. If
/// this method returns an error code then the renaming is prevented.
///
/// The xRename method is required for every virtual table
/// implementation.
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <param name="nArg">
/// The number of arguments to the function being sought.
/// </param>
/// <param name="zName">
/// The name of the function being sought.
/// </param>
/// <param name="callback">
/// Upon success, this parameter must be modified to contain the
/// delegate responsible for implementing the specified function.
/// </param>
/// <param name="pClientData">
/// Upon success, this parameter must be modified to contain the
/// native user data pointer associated with
/// <paramref name="callback" />.
/// </param>
/// <returns>
/// Non-zero if the specified function was found; zero otherwise.
/// </returns>
int xFindFunction(
IntPtr pVtab,
int nArg,
IntPtr zName,
ref SQLiteCallback callback,
ref IntPtr pClientData
);
///////////////////////////////////////////////////////////////////////
/// <summary>
/// This method provides notification that the virtual table
/// implementation that the virtual table will be given a new name. If
/// this method returns SQLITE_OK then SQLite renames the table. If
/// this method returns an error code then the renaming is prevented.
///
/// The xRename method is required for every virtual table
/// implementation.
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <param name="zNew">
/// The native pointer to the UTF-8 encoded string containing the new
/// name for the virtual table.
................................................................................
IntPtr pVtab,
IntPtr zNew
);
///////////////////////////////////////////////////////////////////////
/// <summary>
/// These methods provide the virtual table implementation an
/// opportunity to implement nested transactions. They are always
/// optional and will only be called in SQLite version 3.7.7 and later.
///
/// When xSavepoint(X,N) is invoked, that is a signal to the virtual
/// table X that it should save its current state as savepoint N. A
/// subsequent call to xRollbackTo(X,R) means that the state of the
/// virtual table should return to what it was when xSavepoint(X,R) was
/// last called. The call to xRollbackTo(X,R) will invalidate all
/// savepoints with N>R; none of the invalided savepoints will be
/// rolled back or released without first being reinitialized by a call
/// to xSavepoint(). A call to xRelease(X,M) invalidates all savepoints
/// where N>=M.
///
/// None of the xSavepoint(), xRelease(), or xRollbackTo() methods will
/// ever be called except in between calls to xBegin() and either
/// xCommit() or xRollback().
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <param name="iSavepoint">
/// This is an integer identifier under which the the current state of
/// the virtual table should be saved.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
SQLiteErrorCode xSavepoint(
IntPtr pVtab,
int iSavepoint
);
///////////////////////////////////////////////////////////////////////
/// <summary>
/// These methods provide the virtual table implementation an
/// opportunity to implement nested transactions. They are always
/// optional and will only be called in SQLite version 3.7.7 and later.
///
/// When xSavepoint(X,N) is invoked, that is a signal to the virtual
/// table X that it should save its current state as savepoint N. A
/// subsequent call to xRollbackTo(X,R) means that the state of the
/// virtual table should return to what it was when xSavepoint(X,R) was
/// last called. The call to xRollbackTo(X,R) will invalidate all
/// savepoints with N>R; none of the invalided savepoints will be
/// rolled back or released without first being reinitialized by a call
/// to xSavepoint(). A call to xRelease(X,M) invalidates all savepoints
/// where N>=M.
///
/// None of the xSavepoint(), xRelease(), or xRollbackTo() methods will
/// ever be called except in between calls to xBegin() and either
/// xCommit() or xRollback().
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <param name="iSavepoint">
/// This is an integer used to indicate that any saved states with an
/// identifier greater than or equal to this should be deleted by the
/// virtual table.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
SQLiteErrorCode xRelease(
IntPtr pVtab,
int iSavepoint
);
///////////////////////////////////////////////////////////////////////
/// <summary>
/// These methods provide the virtual table implementation an
/// opportunity to implement nested transactions. They are always
/// optional and will only be called in SQLite version 3.7.7 and later.
///
/// When xSavepoint(X,N) is invoked, that is a signal to the virtual
/// table X that it should save its current state as savepoint N. A
/// subsequent call to xRollbackTo(X,R) means that the state of the
/// virtual table should return to what it was when xSavepoint(X,R) was
/// last called. The call to xRollbackTo(X,R) will invalidate all
/// savepoints with N>R; none of the invalided savepoints will be
/// rolled back or released without first being reinitialized by a call
/// to xSavepoint(). A call to xRelease(X,M) invalidates all savepoints
/// where N>=M.
///
/// None of the xSavepoint(), xRelease(), or xRollbackTo() methods will
/// ever be called except in between calls to xBegin() and either
/// xCommit() or xRollback().
/// </summary>
/// <param name="pVtab">
/// The native pointer to the sqlite3_vtab derived structure.
/// </param>
/// <param name="iSavepoint">
/// This is an integer identifier used to specify a specific saved
/// state for the virtual table for it to restore itself back to, which
/// should also have the effect of deleting all saved states with an
/// integer identifier greater than this one.
/// </param>
/// <returns>
/// A standard SQLite return code.
/// </returns>
SQLiteErrorCode xRollbackTo(
IntPtr pVtab,
int iSavepoint
................................................................................
return SQLiteErrorCode.Error;
}
///////////////////////////////////////////////////////////////////////
private SQLiteErrorCode xUpdate(
IntPtr pVtab,
int argc,
IntPtr[] argv,
ref long rowId
)
{
try
{
SQLiteVirtualTable table = TableFromIntPtr(pVtab);
if (table != null)
{
return Update(
table, SQLiteMarshal.ValueArrayFromIntPtrArray(argv),
ref rowId);
}
}
catch (Exception e) /* NOTE: Must catch ALL. */
{
SetTableError(pVtab, e.ToString());
}
|
Changes to System.Data.SQLite/UnsafeNativeMethods.cs.
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///////////////////////////////////////////////////////////////////////////
#if !PLATFORM_COMPACTFRAMEWORK
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
#endif
public delegate SQLiteErrorCode xUpdate(
IntPtr pVtab,
int nData,
IntPtr apData,
ref long rowId
);
///////////////////////////////////////////////////////////////////////////
#if !PLATFORM_COMPACTFRAMEWORK
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
|
| > | |
1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 |
///////////////////////////////////////////////////////////////////////////
#if !PLATFORM_COMPACTFRAMEWORK
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
#endif
public delegate SQLiteErrorCode xUpdate(
IntPtr pVtab,
int argc,
[MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 1)]
IntPtr[] argv,
ref long rowId
);
///////////////////////////////////////////////////////////////////////////
#if !PLATFORM_COMPACTFRAMEWORK
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
|