/**
* @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;
}
