// object[] getCurrent() {
// return oCurrentData;
// }
/**
* Constructor declaration
*
*
* @param t
* @param alias
* @param outerjoin
*/
public TableFilter(Table t, string alias, bool outerjoin)
{
tTable = t;
iIndex = null;
sAlias = alias != null ? alias : t.getName();
bOuterJoin = outerjoin;
oEmptyData = tTable.getNewRow();
}
/**
* Constructor declaration
*
*
* @param type
* @param main
* @param ref
* @param cmain
* @param cref
*/
public Constraint(int type, Table main, Table child, int[] cmain,
int[] cref)
{
iType = type;
tMain = main;
tRef = child;
iColMain = cmain;
iColRef = cref;
iLen = cmain.Length;
if (Trace.ASSERT)
{
Trace.assert(cmain.Length == cref.Length);
}
oMain = tMain.getNewRow();
oRef = tRef.getNewRow();
iMain = tMain.getIndexForColumns(cmain);
iRef = tRef.getIndexForColumns(cref);
}
/**
* Method declaration
*
*
* @return
*
* @throws Exception
*/
public bool findFirst()
{
if (iIndex == null)
{
iIndex = tTable.getPrimaryIndex();
}
if (eStart == null)
{
nCurrent = iIndex.first();
}
else
{
int type = eStart.getArg().getDataType();
object o = eStart.getArg2().getValue(type);
nCurrent = iIndex.findFirst(o, eStart.getType());
}
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;
}
/**
* Method declaration
*
*
* @param e
*
* @throws Exception
*/
public void setCondition(Expression e)
{
int type = e.getType();
Expression e1 = e.getArg();
Expression e2 = e.getArg2();
if (type == Expression.AND)
{
setCondition(e1);
setCondition(e2);
return;
}
int candidate;
switch (type)
{
case Expression.NOT_EQUAL:
case Expression.LIKE: // todo: maybe use index
case Expression.IN:
candidate = 0;
break;
case Expression.EQUAL:
candidate = 1;
break;
case Expression.BIGGER:
case Expression.BIGGER_EQUAL:
candidate = 2;
break;
case Expression.SMALLER:
case Expression.SMALLER_EQUAL:
candidate = 3;
break;
default:
// not a condition so forget it
return;
}
if (e1.getFilter() == this)
{
// ok include this
}
else if (e2.getFilter() == this && candidate != 0)
{
// swap and try again to allow index usage
e.swapCondition();
setCondition(e);
return;
}
else
{
// unrelated: don't include
return;
}
Trace.assert(e1.getFilter() == this, "setCondition");
if (!e2.isResolved())
{
return;
}
if (candidate == 0)
{
addAndCondition(e);
return;
}
int i = e1.getColumnNr();
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();
}
/**
* Method declaration
*
*
* @param index
*
* @return
*/
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
}
/**
* Method declaration
*
*
* @param column
* @param name
* @param unique
*
* @throws Exception
*/
public void createIndex(int[] column, string name,
bool unique)
{
Trace.assert(iPrimaryKey != -1, "createIndex");
for (int i = 0; i < iIndexCount; i++)
{
Index index = getIndex(i);
if (name.Equals(index.getName()))
{
throw Trace.error(Trace.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];
int[] type = new int[unique ? s : s + 1];
for (int j = 0; j < s; j++)
{
col[j] = column[j];
type[j] = getColumn(col[j]).iType;
}
if (!unique)
{
col[s] = iPrimaryKey;
type[s] = getColumn(iPrimaryKey).iType;
}
Index newindex = new Index(name, col, type, unique);
if (iIndexCount != 0)
{
Trace.assert(isEmpty(), "createIndex");
}
vIndex.Add(newindex);
iIndexCount++;
}
/**
* Method declaration
*
*
* @param index
*
* @throws Exception
*/
public void createIndex(Index index)
{
createIndex(index.getColumns(), index.getName(), index.isUnique());
}
/**
* Method declaration
*
* ALTER TABLE tableName ADD COLUMN columnName columnType;
* ALTER TABLE tableName DELETE COLUMN columnName;
*
* <B>Note: </B>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
*
* @return
*
* @throws Exception
*/
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.getColumnCount(); 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();
int iType = Column.getTypeNr(cType);
string sToken = cType;
// int primarykeycolumn = -1;
bool identity = false;
int column = initialTable.getColumnCount() + 1;
// !--
// stolen from CREATE TABLE...
string sColumn = cName;
if (iType == Column.VARCHAR && dDatabase.isIgnoreCase())
{
iType = Column.VARCHAR_IGNORECASE;
}
sToken = tTokenizer.getstring();
if (iType == Column.DOUBLE && 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.getColumnCount()
< initialTable.getInternalColumnCount())
{
swapTable.createPrimaryKey();
}
else
{
swapTable.createPrimaryKey(initialTable.getPrimaryIndex().getColumns()[0]);
}
// endof PrimaryKey...
// sa ne farimam cu indicii... ;-((
Index idx = null;
while (true)
{
idx = initialTable.getNextIndex(idx);
if (idx == null)
{
break;
}
if (idx == initialTable.getPrimaryIndex())
{
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()).rRoot;
do
{
object[] row = swapTable.getNewRow();
object[] row1 = n.data;
for (int i = 0; i < initialTable.getColumnCount();
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.getColumnCount(); i++)
{
Column aColumn = swapTable.getColumn(i);
initialTable.addColumn(aColumn);
}
if (swapTable.getColumnCount()
< swapTable.getInternalColumnCount())
{
initialTable.createPrimaryKey();
}
else
{
initialTable.createPrimaryKey(swapTable.getPrimaryIndex().getColumns()[0]);
}
// endof PrimaryKey...
// sa ne farimam cu indicii... ;-((
idx = null;
while (true)
{
idx = swapTable.getNextIndex(idx);
if (idx == null)
{
break;
}
if (idx == swapTable.getPrimaryIndex())
{
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()).rRoot;
do
{
object[] row = initialTable.getNewRow();
object[] row1 = n.data;
for (int i = 0; i < swapTable.getColumnCount(); 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 Trace.error(Trace.UNEXPECTED_TOKEN, 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.getColumnNr(cName);
for (int i = 0; i < initialTable.getColumnCount(); i++)
{
Column aColumn = initialTable.getColumn(i);
if (i != undesired)
{
swapTable.addColumn(aColumn);
}
}
int pKey = -1;
// !--
if (initialTable.getColumnCount()
< initialTable.getInternalColumnCount())
{
swapTable.createPrimaryKey();
}
else
{
int[] cols = initialTable.getPrimaryIndex().getColumns();
pKey = cols[0];
if ((cols[0] > undesired)
|| (cols[0] + cols.Length < undesired))
{
if (undesired
< initialTable.getPrimaryIndex().getColumns()[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.getPrimaryIndex())
{
continue;
}
bool flag = true;
int[] cols = idx.getColumns();
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.getName(), idx.getColumns(),
idx.getType(), 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()).rRoot;
do
{
object[] row = swapTable.getNewRow();
object[] row1 = n.data;
int j = 0;
for (int i = 0; i < initialTable.getColumnCount();
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.getColumnCount(); i++)
{
Column aColumn = swapTable.getColumn(i);
initialTable.addColumn(aColumn);
}
// !--
if (swapTable.getColumnCount()
< swapTable.getInternalColumnCount())
{
initialTable.createPrimaryKey();
}
else
{
initialTable.createPrimaryKey(swapTable.getPrimaryIndex().getColumns()[0]);
}
// endof PrimaryKey...
// sa ne farimam cu indicii... ;-((
idx = null;
while (true)
{
idx = swapTable.getNextIndex(idx);
if (idx == null)
{
break;
}
if (idx == swapTable.getPrimaryIndex())
{
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()).rRoot;
do
{
object[] row = initialTable.getNewRow();
object[] row1 = n.data;
for (int i = 0; i < swapTable.getColumnCount(); 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 Trace.error(Trace.UNEXPECTED_TOKEN, token);
}
count = 3;
}
Result r = new Result();
r.iUpdateCount = count; // --> nu tre inca...??
return r;
}
