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Overview
| Comment: | Support the colUsed field to the sqlite3_index_info structure passed to virtual table xBestIndex methods. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
5e37af01d9aceb5ae202c93af09e805e |
| User & Date: | mistachkin 2015-12-02 05:34:41 |
Context
|
2015-12-02
| ||
| 05:40 | Be sure to increment the structure offset to account for optional sqlite3_index_info members. check-in: 189db19efc user: mistachkin tags: trunk | |
| 05:34 | Support the colUsed field to the sqlite3_index_info structure passed to virtual table xBestIndex methods. check-in: 5e37af01d9 user: mistachkin tags: trunk | |
|
2015-12-01
| ||
| 19:03 | Update the MSVCRT runtimes for VS 2015 in externals to 'Update 1'. check-in: 7866eaefcc user: mistachkin tags: trunk | |
Changes
Changes to System.Data.SQLite/SQLiteModule.cs.
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return true;
return false;
}
///////////////////////////////////////////////////////////////////////
#region Public Properties
private SQLiteIndexConstraintUsage[] constraintUsages;
/// <summary>
/// An array of <see cref="SQLiteIndexConstraintUsage" /> object
/// instances, each containing information to be supplied to the SQLite
/// core library.
/// </summary>
................................................................................
/// version 3.9.0.
/// </summary>
public SQLiteIndexFlags? IdxFlags
{
get { return idxFlags; }
set { idxFlags = value; }
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteIndex Helper Class
................................................................................
if (index.Outputs.CanUseIdxFlags() &&
index.Outputs.IdxFlags.HasValue)
{
SQLiteMarshal.WriteInt32(pIndex, offset,
(int)index.Outputs.IdxFlags.GetValueOrDefault());
}
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Public Properties
private SQLiteIndexInputs inputs;
|
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return true;
return false;
}
///////////////////////////////////////////////////////////////////////
/// <summary>
/// Determines if the native flags field can be used, based on the
/// available version of the SQLite core library.
/// </summary>
/// <returns>
/// Non-zero if the <see cref="ColUsed" /> property is supported by
/// the SQLite core library.
/// </returns>
public bool CanUseColUsed()
{
if (UnsafeNativeMethods.sqlite3_libversion_number() >= 3010000)
return true;
return false;
}
///////////////////////////////////////////////////////////////////////
#region Public Properties
private SQLiteIndexConstraintUsage[] constraintUsages;
/// <summary>
/// An array of <see cref="SQLiteIndexConstraintUsage" /> object
/// instances, each containing information to be supplied to the SQLite
/// core library.
/// </summary>
................................................................................
/// version 3.9.0.
/// </summary>
public SQLiteIndexFlags? IdxFlags
{
get { return idxFlags; }
set { idxFlags = value; }
}
///////////////////////////////////////////////////////////////////////
private long? colUsed;
/// <summary>
/// The colUsed field indicates which columns of the virtual table
/// may be required by the current scan. Virtual table columns are
/// numbered from zero in the order in which they appear within the
/// CREATE TABLE statement passed to sqlite3_declare_vtab(). For the
/// first 63 columns (columns 0-62), the corresponding bit is set
/// within the colUsed mask if the column may be required by SQLite.
/// If the table has at least 64 columns and any column to the right
/// of the first 63 is required, then bit 63 of colUsed is also set.
/// In other words, column iCol may be required if the expression
/// (colUsed & ((sqlite3_uint64)1 << (iCol>=63 ? 63 : iCol)))
/// evaluates to non-zero. Using a null value here indicates that a
/// default flags value should be used. This property has no effect
/// if the SQLite core library is not at least version 3.10.0.
/// </summary>
public long? ColUsed
{
get { return colUsed; }
set { colUsed = value; }
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteIndex Helper Class
................................................................................
if (index.Outputs.CanUseIdxFlags() &&
index.Outputs.IdxFlags.HasValue)
{
SQLiteMarshal.WriteInt32(pIndex, offset,
(int)index.Outputs.IdxFlags.GetValueOrDefault());
}
if (index.Outputs.CanUseColUsed() &&
index.Outputs.ColUsed.HasValue)
{
SQLiteMarshal.WriteInt64(pIndex, offset,
index.Outputs.ColUsed.GetValueOrDefault());
}
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Public Properties
private SQLiteIndexInputs inputs;
|