/**
* @param schemaTable
* @param name
* @param generateAutoIndexName
* @throws SqlJetException
*/
private boolean doDropIndex(String indexName, boolean allowAutoIndex, boolean throwIfFial)
throws SqlJetException {
if (!indexDefs.containsKey(indexName)) {
if (throwIfFial) throw new SqlJetException(SqlJetErrorCode.MISUSE);
return false;
}
final SqlJetBaseIndexDef indexDef = (SqlJetBaseIndexDef) indexDefs.get(indexName);
if (!allowAutoIndex && indexDef.isImplicit()) {
if (throwIfFial)
throw new SqlJetException(
SqlJetErrorCode.MISUSE, String.format(CANT_DELETE_IMPLICIT_INDEX, indexName));
return false;
}
final ISqlJetBtreeSchemaTable schemaTable = openSchemaTable(true);
try {
schemaTable.lock();
try {
if (!schemaTable.goToRow(indexDef.getRowId())
|| !INDEX_TYPE.equals(schemaTable.getTypeField())) {
if (throwIfFial) throw new SqlJetException(SqlJetErrorCode.INTERNAL);
return false;
}
final String n = schemaTable.getNameField();
if (null == n || !indexName.equals(n)) {
if (throwIfFial) throw new SqlJetException(SqlJetErrorCode.INTERNAL);
return false;
}
if (!allowAutoIndex && schemaTable.isNull(ISqlJetBtreeSchemaTable.SQL_FIELD)) {
if (throwIfFial)
throw new SqlJetException(
SqlJetErrorCode.MISUSE, String.format(CANT_DELETE_IMPLICIT_INDEX, indexName));
return false;
}
schemaTable.delete();
} finally {
schemaTable.unlock();
}
} finally {
schemaTable.close();
}
final int page = indexDef.getPage();
final int moved = btree.dropTable(page);
if (moved != 0) {
movePage(page, moved);
}
return true;
}
/**
* @param schemaTable
* @param generateAutoIndexName
* @throws SqlJetException
*/
private SqlJetBaseIndexDef createAutoIndex(
ISqlJetBtreeSchemaTable schemaTable, String tableName, String autoIndexName)
throws SqlJetException {
final int page = btree.createTable(BTREE_CREATE_INDEX_FLAGS);
final SqlJetBaseIndexDef indexDef = new SqlJetBaseIndexDef(autoIndexName, tableName, page);
indexDef.setRowId(schemaTable.insertRecord(INDEX_TYPE, autoIndexName, tableName, page, null));
indexDefs.put(autoIndexName, indexDef);
return indexDef;
}
private void readShema(ISqlJetBtreeSchemaTable table) throws SqlJetException {
for (table.first(); !table.eof(); table.next()) {
final String type = table.getTypeField();
if (null == type) {
continue;
}
final String name = table.getNameField();
if (null == name) {
continue;
}
final int page = table.getPageField();
if (TABLE_TYPE.equals(type)) {
String sql = table.getSqlField();
// System.err.println(sql);
final CommonTree ast = (CommonTree) parseTable(sql).getTree();
if (!isCreateVirtualTable(ast)) {
final SqlJetTableDef tableDef = new SqlJetTableDef(ast, page);
if (!name.equals(tableDef.getName())) {
throw new SqlJetException(SqlJetErrorCode.CORRUPT);
}
tableDef.setRowId(table.getRowId());
tableDefs.put(name, tableDef);
} else {
final SqlJetVirtualTableDef virtualTableDef = new SqlJetVirtualTableDef(ast, page);
if (!name.equals(virtualTableDef.getTableName())) {
throw new SqlJetException(SqlJetErrorCode.CORRUPT);
}
virtualTableDef.setRowId(table.getRowId());
virtualTableDefs.put(name, virtualTableDef);
}
} else if (INDEX_TYPE.equals(type)) {
final String tableName = table.getTableField();
final String sql = table.getSqlField();
if (null != sql) {
// System.err.println(sql);
final CommonTree ast = (CommonTree) parseIndex(sql).getTree();
final SqlJetIndexDef indexDef = new SqlJetIndexDef(ast, page);
if (!name.equals(indexDef.getName())) {
throw new SqlJetException(SqlJetErrorCode.CORRUPT);
}
if (!tableName.equals(indexDef.getTableName())) {
throw new SqlJetException(SqlJetErrorCode.CORRUPT);
}
indexDef.setRowId(table.getRowId());
indexDefs.put(name, indexDef);
} else {
SqlJetBaseIndexDef indexDef = new SqlJetBaseIndexDef(name, tableName, page);
indexDef.setRowId(table.getRowId());
indexDefs.put(name, indexDef);
}
}
}
bindIndexes();
}
/**
* @param page
* @param moved
* @throws SqlJetException
*/
private void movePage(final int page, final int moved) throws SqlJetException {
final ISqlJetBtreeSchemaTable schemaTable = openSchemaTable(true);
try {
schemaTable.lock();
try {
for (schemaTable.first(); !schemaTable.eof(); schemaTable.next()) {
final long pageField = schemaTable.getPageField();
if (pageField == moved) {
final String nameField = schemaTable.getNameField();
schemaTable.updateRecord(
schemaTable.getRowId(),
schemaTable.getTypeField(),
nameField,
schemaTable.getTableField(),
page,
schemaTable.getSqlField());
final ISqlJetIndexDef index = getIndex(nameField);
if (index != null) {
if (index instanceof SqlJetBaseIndexDef) {
((SqlJetBaseIndexDef) index).setPage(page);
}
} else {
final ISqlJetTableDef table = getTable(nameField);
if (table != null) {
if (table instanceof SqlJetTableDef) {
((SqlJetTableDef) table).setPage(page);
}
}
}
return;
}
}
} finally {
schemaTable.unlock();
}
} finally {
schemaTable.close();
}
}
/**
* @param schemaTable
* @param newTableName
* @param tableName
* @param string
* @throws SqlJetException
*/
private void renameTablesIndices(
final ISqlJetBtreeSchemaTable schemaTable,
String tableName,
String newTableName,
String alterTableName)
throws SqlJetException {
final Set<ISqlJetIndexDef> indexes = getIndexes(tableName);
if (null == indexes || 0 == indexes.size()) {
return;
}
int i = 0;
for (final ISqlJetIndexDef index : indexes) {
if (index instanceof SqlJetBaseIndexDef) {
final SqlJetBaseIndexDef indexDef = (SqlJetBaseIndexDef) index;
final String indexName = indexDef.getName();
final long rowId = indexDef.getRowId();
final int page = indexDef.getPage();
if (!schemaTable.goToRow(rowId)) {
throw new SqlJetException(SqlJetErrorCode.CORRUPT);
}
final String typeField = schemaTable.getTypeField();
final String nameField = schemaTable.getNameField();
final String tableField = schemaTable.getTableField();
final int pageField = schemaTable.getPageField();
if (null == typeField || !INDEX_TYPE.equals(typeField)) {
throw new SqlJetException(SqlJetErrorCode.CORRUPT);
}
if (null == nameField || !indexName.equals(nameField)) {
throw new SqlJetException(SqlJetErrorCode.CORRUPT);
}
if (null == tableField || !tableName.equals(tableField)) {
throw new SqlJetException(SqlJetErrorCode.CORRUPT);
}
if (0 == pageField || pageField != page) {
throw new SqlJetException(SqlJetErrorCode.CORRUPT);
}
indexDef.setTableName(newTableName);
String newIndexName = indexName;
String alteredIndexSql = null;
if (index.isImplicit()) {
newIndexName = generateAutoIndexName(tableName, ++i);
indexDef.setName(newIndexName);
indexDefs.remove(indexName);
indexDefs.put(newIndexName, indexDef);
} else {
alteredIndexSql = getAlteredIndexSql(schemaTable.getSqlField(), alterTableName);
}
schemaTable.insertRecord(INDEX_TYPE, newIndexName, newTableName, page, alteredIndexSql);
} else {
throw new SqlJetException(SqlJetErrorCode.INTERNAL);
}
}
}
