/// <summary>
/// Default constructor.
/// </summary>
/// <param name="t"></param>
/// <param name="alias"></param>
/// <param name="outerjoin"></param>
public TableFilter(Table t, string alias, bool outerjoin)
{
tTable = t;
iIndex = null;
sAlias = alias != null ? alias : t.Name;
bOuterJoin = outerjoin;
oEmptyData = tTable.NewRow;
}
public bool FindFirst()
{
if (iIndex == null)
{
iIndex = tTable.PrimaryIndex;
}
if (eStart == null)
{
nCurrent = iIndex.First();
}
else
{
ColumnType type = eStart.Arg.ColumnType;
object o = eStart.Arg2.GetValue(type);
nCurrent = iIndex.FindFirst(o, eStart.Type);
}
while (nCurrent != null)
{
oCurrentData = nCurrent.GetData();
if (!Test(eEnd))
{
break;
}
if (Test(eAnd))
{
return true;
}
nCurrent = iIndex.Next(nCurrent);
}
oCurrentData = oEmptyData;
if (bOuterJoin)
{
return true;
}
return false;
}
public void SetCondition(Expression e)
{
ExpressionType type = e.Type;
Expression e1 = e.Arg;
Expression e2 = e.Arg2;
if (type == ExpressionType.And)
{
SetCondition(e1);
SetCondition(e2);
return;
}
int candidate;
switch (type)
{
case ExpressionType.NotEqual:
case ExpressionType.Like: // todo: maybe use index
case ExpressionType.In:
candidate = 0;
break;
case ExpressionType.Equal:
candidate = 1;
break;
case ExpressionType.Bigger:
case ExpressionType.BiggerEqual:
candidate = 2;
break;
case ExpressionType.Smaller:
case ExpressionType.SmallerEqual:
candidate = 3;
break;
default:
// not a condition so forget it
return;
}
if (e1.Filter == this)
{
// ok include this
}
else if (e2.Filter == this && candidate != 0)
{
// swap and try again to allow index usage
e.SwapCondition();
SetCondition(e);
return;
}
else
{
// unrelated: don't include
return;
}
TracingHelper.Assert(e1.Filter == this, "setCondition");
if (!e2.IsResolved)
{
return;
}
if (candidate == 0)
{
AddAndCondition(e);
return;
}
int i = e1.ColumnNumber;
Index index = tTable.GetIndexForColumn(i);
if (index == null || (iIndex != index && iIndex != null))
{
// no index or already another index is used
AddAndCondition(e);
return;
}
iIndex = index;
if (candidate == 1)
{
// candidate for both start & end
if (eStart != null || eEnd != null)
{
AddAndCondition(e);
return;
}
eStart = new Expression(e);
eEnd = eStart;
}
else if (candidate == 2)
{
// candidate for start
if (eStart != null)
{
AddAndCondition(e);
return;
}
eStart = new Expression(e);
}
else if (candidate == 3)
{
// candidate for end
if (eEnd != null)
{
AddAndCondition(e);
return;
}
eEnd = new Expression(e);
}
e.SetTrue();
}
public Index GetNextIndex(Index index)
{
int i = 0;
if (index != null)
{
for (; i < iIndexCount && GetIndex(i) != index; i++);
i++;
}
if (i < iIndexCount)
{
return GetIndex(i);
}
return null; // no more indexes
}
public void CreateIndex(int[] column, string name, bool unique)
{
TracingHelper.Assert(iPrimaryKey != -1, "createIndex");
for (int i = 0; i < iIndexCount; i++)
{
Index index = GetIndex(i);
if (name.Equals(index.Name))
{
throw TracingHelper.Error(TracingHelper.INDEX_ALREADY_EXISTS);
}
}
int s = column.Length;
// The primary key field is added for non-unique indexes
// making all indexes unique
int[] col = new int[unique ? s : s + 1];
ColumnType[] type = new ColumnType[unique ? s : s + 1];
for (int j = 0; j < s; j++)
{
col[j] = column[j];
type[j] = GetColumn(col[j]).ColumnType;
}
if (!unique)
{
col[s] = iPrimaryKey;
type[s] = GetColumn(iPrimaryKey).ColumnType;
}
Index newindex = new Index(name, col, type, unique);
if (iIndexCount != 0)
{
TracingHelper.Assert(IsEmpty, "createIndex");
}
vIndex.Add(newindex);
iIndexCount++;
}
public void CreateIndex(Index index)
{
CreateIndex(index.Columns, index.Name, index.IsUnique);
}
/// <summary>
/// Process ALTER TABLE statements.
///
/// ALTER TABLE tableName ADD COLUMN columnName columnType;
/// ALTER TABLE tableName DELETE COLUMN columnName;
/// </summary>
/// <remarks>
/// The only change I've made to Sergio's original code was
/// changing the insert's to call insertNoCheck to bypass the trigger
/// mechanism that is a part of hsqldb 1.60 and beyond. - Mark Tutt
/// </remarks>
/// <returns></returns>
public Result ProcessAlter()
{
tTokenizer.GetThis ("TABLE");
string token = tTokenizer.GetString ();
cChannel.CheckReadWrite ();
// cChannel.check(token,Access.ALTER); --> Accessul nu-l inca controleaza...
string tName = token;
string swap = tName + "SWAP";
// nimicirea swapului...
dDatabase.Execute ("DROP TABLE " + swap, cChannel);
Table initialTable = dDatabase.GetTable (token, cChannel);
int count = 0;
token = tTokenizer.GetString ();
if (token.Equals ("ADD")) {
token = tTokenizer.GetString ();
if (token.Equals ("COLUMN")) {
Table swapTable = new Table (dDatabase, true, swap,
initialTable.IsCached);
// copiem coloanele (fara date) din tabelul initial in swap
for (int i = 0; i < initialTable.ColumnCount; i++) {
Column aColumn = initialTable.GetColumn (i);
swapTable.AddColumn (aColumn);
}
// end Of copiem coloanele...
// aflam daca are PrimaryKey & o cream...
string cName = tTokenizer.GetString ();
string cType = tTokenizer.GetString ();
ColumnType iType = Column.GetColumnType (cType);
string sToken = cType;
// int primarykeycolumn = -1;
bool identity = false;
int column = initialTable.ColumnCount + 1;
// !--
// stolen from CREATE TABLE...
string sColumn = cName;
if (iType == ColumnType.VarChar && dDatabase.IsIgnoreCase) {
iType = ColumnType.VarCharIgnoreCase;
}
sToken = tTokenizer.GetString ();
if (iType == ColumnType.DbDouble && sToken.Equals ("PRECISION")) {
sToken = tTokenizer.GetString ();
}
if (sToken.Equals ("(")) {
// overread length
do {
sToken = tTokenizer.GetString ();
} while (!sToken.Equals (")"));
sToken = tTokenizer.GetString ();
}
// !--
bool nullable = true;
if (sToken.Equals ("NULL")) {
sToken = tTokenizer.GetString ();
} else if (sToken.Equals ("NOT")) {
tTokenizer.GetThis ("NULL");
nullable = false;
sToken = tTokenizer.GetString ();
}
/*
* if(sToken.Equals("IDENTITY")) {
* identity=true;
* Trace.check(primarykeycolumn==-1,Trace.SECOND_PRIMARY_KEY,sColumn);
* sToken=tTokenizer.getstring();
* primarykeycolumn=column;
* }
*
* if(sToken.Equals("PRIMARY")) {
* tTokenizer.getThis("KEY");
* Trace.check(identity || primarykeycolumn==-1,
* Trace.SECOND_PRIMARY_KEY,sColumn);
* primarykeycolumn=column;
* //sToken=tTokenizer.getstring();
* }
* //end of STOLEN...
*/
swapTable.AddColumn (cName, iType, nullable,
identity); // under construction...
if (initialTable.ColumnCount
< initialTable.InternalColumnCount) {
swapTable.CreatePrimaryKey ();
} else {
swapTable.CreatePrimaryKey (initialTable.PrimaryIndex.Columns [0]);
}
// endof PrimaryKey...
// sa ne farimam cu indicii... ;-((
Index idx = null;
while (true) {
idx = initialTable.GetNextIndex (idx);
if (idx == null) {
break;
}
if (idx == initialTable.PrimaryIndex) {
continue;
}
swapTable.CreateIndex (idx);
}
// end of Index...
cChannel.Commit ();
dDatabase.LinkTable (swapTable);
Tokenizer tmpTokenizer = new Tokenizer ("SELECT * FROM "
+ tName);
Parser pp = new Parser (dDatabase, tmpTokenizer, cChannel);
string ff = tmpTokenizer.GetString ();
if (!initialTable.IsEmpty) {
Record n = ((Result)pp.ProcessSelect ()).Root;
do {
object[] row = swapTable.NewRow;
object[] row1 = n.Data;
for (int i = 0; i < initialTable.ColumnCount;
i++) {
row [i] = row1 [i];
}
swapTable.InsertNoCheck (row, cChannel);
n = n.Next;
} while (n != null);
}
dDatabase.Execute ("DROP TABLE " + tName, cChannel);
// cream tabelul vechi cu proprietatile celui nou...
initialTable = new Table (dDatabase, true, tName,
swapTable.IsCached);
for (int i = 0; i < swapTable.ColumnCount; i++) {
Column aColumn = swapTable.GetColumn (i);
initialTable.AddColumn (aColumn);
}
if (swapTable.ColumnCount
< swapTable.InternalColumnCount) {
initialTable.CreatePrimaryKey ();
} else {
initialTable.CreatePrimaryKey (swapTable.PrimaryIndex.Columns [0]);
}
// endof PrimaryKey...
// sa ne farimam cu indicii... ;-((
idx = null;
while (true) {
idx = swapTable.GetNextIndex (idx);
if (idx == null) {
break;
}
if (idx == swapTable.PrimaryIndex) {
continue;
}
initialTable.CreateIndex (idx);
}
// end of Index...
cChannel.Commit ();
dDatabase.LinkTable (initialTable);
// end of cream...
// copiem datele din swap in tabel...
tmpTokenizer = new Tokenizer ("SELECT * FROM " + swap);
pp = new Parser (dDatabase, tmpTokenizer, cChannel);
ff = tmpTokenizer.GetString ();
if (!swapTable.IsEmpty) {
Record n = ((Result)pp.ProcessSelect ()).Root;
do {
object[] row = initialTable.NewRow;
object[] row1 = n.Data;
for (int i = 0; i < swapTable.ColumnCount; i++) {
row [i] = row1 [i];
}
initialTable.InsertNoCheck (row, cChannel);
n = n.Next;
} while (n != null);
// end of copiem...
}
dDatabase.Execute ("DROP TABLE " + swap, cChannel);
count = 4;
} else {
throw TracingHelper.Error (TracingHelper.UnexpectedToken, token);
}
} else if (token.Equals ("DELETE")) {
token = tTokenizer.GetString ();
if (token.Equals ("COLUMN")) {
Table swapTable = new Table (dDatabase, true, swap,
initialTable.IsCached);
string cName = tTokenizer.GetString ();
int undesired = initialTable.GetColumnNumber (cName);
for (int i = 0; i < initialTable.ColumnCount; i++) {
Column aColumn = initialTable.GetColumn (i);
if (i != undesired) {
swapTable.AddColumn (aColumn);
}
}
int pKey = -1;
// !--
if (initialTable.ColumnCount
< initialTable.InternalColumnCount) {
swapTable.CreatePrimaryKey ();
} else {
int[] cols = initialTable.PrimaryIndex.Columns;
pKey = cols [0];
if ((cols [0] > undesired)
|| (cols [0] + cols.Length < undesired)) {
if (undesired
< initialTable.PrimaryIndex.Columns [0]) {
// reindexarea...
for (int i = 0; i < cols.Length; i++) {
cols [i]--;
}
// endOf reindexarea...
}
// MT: This initially wouldn't compile, missing the array index on cols[]
swapTable.CreatePrimaryKey (cols [0]);
} else {
swapTable.CreatePrimaryKey ();
}
}
// endof PrimaryKey...
// sa ne farimam cu indicii... ;-((
Index idx = null;
while (true) {
idx = initialTable.GetNextIndex (idx);
if (idx == null) {
break;
}
if (idx == initialTable.PrimaryIndex) {
continue;
}
bool flag = true;
int[] cols = idx.Columns;
for (int i = 0; i < cols.Length; i++) {
if (cols [i] == undesired) {
flag = false;
}
}
if (flag) {
Index tIdx;
for (int i = 0; i < cols.Length; i++) {
if (cols [i] > undesired) {
cols [i]--;
}
}
tIdx = new Index (idx.Name, idx.Columns, idx.ColumnType, idx.IsUnique);
swapTable.CreateIndex (tIdx);
}
}
// !--
cChannel.Commit ();
dDatabase.LinkTable (swapTable);
Tokenizer tmpTokenizer = new Tokenizer ("SELECT * FROM "
+ tName);
Parser pp = new Parser (dDatabase, tmpTokenizer, cChannel);
string ff = tmpTokenizer.GetString ();
if (!initialTable.IsEmpty) {
Record n = ((Result)pp.ProcessSelect ()).Root;
do {
object[] row = swapTable.NewRow;
object[] row1 = n.Data;
int j = 0;
for (int i = 0; i < initialTable.ColumnCount;
i++) {
if (i != undesired) {
row [j] = row1 [i];
j++;
}
}
swapTable.InsertNoCheck (row, cChannel);
n = n.Next;
} while (n != null);
}
dDatabase.Execute ("DROP TABLE " + tName, cChannel);
// cream tabelul vechi cu proprietatile celui nou...
initialTable = new Table (dDatabase, true, tName,
swapTable.IsCached);
for (int i = 0; i < swapTable.ColumnCount; i++) {
Column aColumn = swapTable.GetColumn (i);
initialTable.AddColumn (aColumn);
}
// !--
if (swapTable.ColumnCount
< swapTable.InternalColumnCount) {
initialTable.CreatePrimaryKey ();
} else {
initialTable.CreatePrimaryKey (swapTable.PrimaryIndex.Columns [0]);
}
// endof PrimaryKey...
// sa ne farimam cu indicii... ;-((
idx = null;
while (true) {
idx = swapTable.GetNextIndex (idx);
if (idx == null) {
break;
}
if (idx == swapTable.PrimaryIndex) {
continue;
}
initialTable.CreateIndex (idx);
}
// end of Index...
// !--
cChannel.Commit ();
dDatabase.LinkTable (initialTable);
// end of cream...
// copiem datele din swap in tabel...
tmpTokenizer = new Tokenizer ("SELECT * FROM " + swap);
pp = new Parser (dDatabase, tmpTokenizer, cChannel);
ff = tmpTokenizer.GetString ();
if (!swapTable.IsEmpty) {
Record n = ((Result)pp.ProcessSelect ()).Root;
do {
object[] row = initialTable.NewRow;
object[] row1 = n.Data;
for (int i = 0; i < swapTable.ColumnCount; i++) {
row [i] = row1 [i];
}
initialTable.InsertNoCheck (row, cChannel);
n = n.Next;
} while (n != null);
// end of copiem...
}
dDatabase.Execute ("DROP TABLE " + swap, cChannel);
count = 3;
} else {
throw TracingHelper.Error (TracingHelper.UnexpectedToken, token);
}
count = 3;
}
Result r = new Result ();
r.SetUpdateCount (count);
return r;
}
/// <summary>
/// Constructor using Main and Reference Table.
/// </summary>
/// <param name="type"></param>
/// <param name="main"></param>
/// <param name="child"></param>
/// <param name="columnMain"></param>
/// <param name="columnRef"></param>
public Constraint(ConstraintType type, Table main, Table child, int[] columnMain, int[] columnRef)
{
_type = type;
_mainTable = main;
_refTable = child;
_mainColumns = columnMain;
_refColumns = columnRef;
_len = columnMain.Length;
if (TracingHelper.AssertEnabled)
{
TracingHelper.Assert(columnMain.Length == columnRef.Length);
}
_mainData = _mainTable.NewRow;
_refData = _refTable.NewRow;
_mainIndex = _mainTable.GetIndexForColumns(columnMain);
_refIndex = _refTable.GetIndexForColumns(columnRef);
}
