public Table MoveDefinition(string withoutIndex)
{
Table tn = new Table(dDatabase, true, Name, IsCached);
for (int i = 0; i < ColumnCount; i++)
{
tn.AddColumn(GetColumn(i));
}
// todo: there should be nothing special with the primary key!
if (iVisibleColumns < iColumnCount)
{
tn.CreatePrimaryKey();
}
else
{
tn.CreatePrimaryKey(PrimaryIndex.Columns[0]);
}
Index idx = null;
while (true)
{
idx = GetNextIndex(idx);
if (idx == null)
{
break;
}
if (withoutIndex != null && idx.Name.Equals(withoutIndex))
{
continue;
}
if (idx == PrimaryIndex)
{
continue;
}
tn.CreateIndex(idx);
}
for (int i = 0; i < iConstraintCount; i++)
{
Constraint c = (Constraint)vConstraint[i];
c.ReplaceTable(this, tn);
}
tn.vConstraint = vConstraint;
return(tn);
}
private void CreateIndex(Channel channel, Table t, int[] col, string name, bool unique)
{
channel.Commit();
if (t.IsEmpty)
{
t.CreateIndex(col, name, unique);
}
else
{
Table tn = t.MoveDefinition(null);
tn.CreateIndex(col, name, unique);
tn.MoveData(t);
DropTable(t.Name);
LinkTable(tn);
}
}
/// <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;
}
public Table MoveDefinition(string withoutIndex)
{
Table tn = new Table(dDatabase, true, Name, IsCached);
for (int i = 0; i < ColumnCount; i++)
{
tn.AddColumn(GetColumn(i));
}
// todo: there should be nothing special with the primary key!
if (iVisibleColumns < iColumnCount)
{
tn.CreatePrimaryKey();
}
else
{
tn.CreatePrimaryKey(PrimaryIndex.Columns[0]);
}
Index idx = null;
while (true)
{
idx = GetNextIndex(idx);
if (idx == null)
{
break;
}
if (withoutIndex != null && idx.Name.Equals(withoutIndex))
{
continue;
}
if (idx == PrimaryIndex)
{
continue;
}
tn.CreateIndex(idx);
}
for (int i = 0; i < iConstraintCount; i++)
{
Constraint c = (Constraint) vConstraint[i];
c.ReplaceTable(this, tn);
}
tn.vConstraint = vConstraint;
return tn;
}
private void CreateIndex(Channel channel, Table t, int[] col, string name, bool unique)
{
channel.Commit();
if (t.IsEmpty)
{
t.CreateIndex(col, name, unique);
}
else
{
Table tn = t.MoveDefinition(null);
tn.CreateIndex(col, name, unique);
tn.MoveData(t);
DropTable(t.Name);
LinkTable(tn);
}
}