bool TableCatalogDelegate::getIndexScheme(catalog::Table const &catalogTable,
catalog::Index const &catalogIndex,
const TupleSchema *schema,
TableIndexScheme *scheme)
{
vector<int> index_columns;
vector<ValueType> column_types;
// The catalog::Index object now has a list of columns that are to be
// used
if (catalogIndex.columns().size() == (size_t)0) {
VOLT_ERROR("Index '%s' in table '%s' does not declare any columns"
" to use",
catalogIndex.name().c_str(),
catalogTable.name().c_str());
return false;
}
vector<AbstractExpression*> indexedExpressions = TableIndex::simplyIndexColumns();
const std::string expressionsAsText = catalogIndex.expressionsjson();
if (expressionsAsText.length() != 0) {
ExpressionUtil::loadIndexedExprsFromJson(indexedExpressions, expressionsAsText);
}
// Since the columns are not going to come back in the proper order from
// the catalogs, we'll use the index attribute to make sure we put them
// in the right order
index_columns.resize(catalogIndex.columns().size());
map<string, catalog::ColumnRef*>::const_iterator colref_iterator;
for (colref_iterator = catalogIndex.columns().begin();
colref_iterator != catalogIndex.columns().end();
colref_iterator++) {
catalog::ColumnRef *catalog_colref = colref_iterator->second;
if (catalog_colref->index() < 0) {
VOLT_ERROR("Invalid column '%d' for index '%s' in table '%s'",
catalog_colref->index(),
catalogIndex.name().c_str(),
catalogTable.name().c_str());
return false;
}
index_columns[catalog_colref->index()] = catalog_colref->column()->index();
}
// partial index predicate
const std::string predicateAsText = catalogIndex.predicatejson();
AbstractExpression* predicate = NULL;
if (!predicateAsText.empty()) {
predicate = ExpressionUtil::loadExpressionFromJson(predicateAsText);
}
*scheme = TableIndexScheme(catalogIndex.name(),
(TableIndexType)catalogIndex.type(),
index_columns,
indexedExpressions,
predicate,
catalogIndex.unique(),
catalogIndex.countable(),
expressionsAsText,
predicateAsText,
schema);
return true;
}
int
TableCatalogDelegate::init(ExecutorContext *executorContext,
catalog::Database &catalogDatabase,
catalog::Table &catalogTable)
{
// Create a persistent table for this table in our catalog
int32_t table_id = catalogTable.relativeIndex();
// Columns:
// Column is stored as map<String, Column*> in Catalog. We have to
// sort it by Column index to preserve column order.
const int numColumns = static_cast<int>(catalogTable.columns().size());
vector<ValueType> columnTypes(numColumns);
vector<int32_t> columnLengths(numColumns);
vector<bool> columnAllowNull(numColumns);
// GWW
vector<bool> columnisEscrow(numColumns);
map<string, catalog::Column*>::const_iterator col_iterator;
string *columnNames = new string[numColumns];
for (col_iterator = catalogTable.columns().begin();
col_iterator != catalogTable.columns().end(); col_iterator++) {
const catalog::Column *catalog_column = col_iterator->second;
const int columnIndex = catalog_column->index();
const ValueType type = static_cast<ValueType>(catalog_column->type());
columnTypes[columnIndex] = type;
const int32_t size = static_cast<int32_t>(catalog_column->size());
//Strings length is provided, other lengths are derived from type
bool varlength = (type == VALUE_TYPE_VARCHAR) || (type == VALUE_TYPE_VARBINARY);
const int32_t length = varlength ? size : static_cast<int32_t>(NValue::getTupleStorageSize(type));
columnLengths[columnIndex] = length;
columnAllowNull[columnIndex] = catalog_column->nullable();
//GWW
columnisEscrow[columnIndex] = catalog_column->escrowColumn();
columnNames[catalog_column->index()] = catalog_column->name();
}
/*
TupleSchema *schema = TupleSchema::createTupleSchema(columnTypes,
columnLengths,
columnAllowNull, true);
*/
TupleSchema *schema = TupleSchema::createTupleSchema(columnTypes,
columnLengths,
columnAllowNull,
columnisEscrow, true);
// Indexes
map<string, TableIndexScheme> index_map;
map<string, catalog::Index*>::const_iterator idx_iterator;
for (idx_iterator = catalogTable.indexes().begin();
idx_iterator != catalogTable.indexes().end(); idx_iterator++) {
catalog::Index *catalog_index = idx_iterator->second;
vector<int> index_columns;
vector<ValueType> column_types;
// The catalog::Index object now has a list of columns that are to be
// used
if (catalog_index->columns().size() == (size_t)0) {
VOLT_ERROR("Index '%s' in table '%s' does not declare any columns"
" to use",
catalog_index->name().c_str(),
catalogTable.name().c_str());
delete [] columnNames;
return false;
}
// Since the columns are not going to come back in the proper order from
// the catalogs, we'll use the index attribute to make sure we put them
// in the right order
index_columns.resize(catalog_index->columns().size());
column_types.resize(catalog_index->columns().size());
bool isIntsOnly = true;
map<string, catalog::ColumnRef*>::const_iterator colref_iterator;
for (colref_iterator = catalog_index->columns().begin();
colref_iterator != catalog_index->columns().end();
colref_iterator++) {
catalog::ColumnRef *catalog_colref = colref_iterator->second;
if (catalog_colref->index() < 0) {
VOLT_ERROR("Invalid column '%d' for index '%s' in table '%s'",
catalog_colref->index(),
catalog_index->name().c_str(),
catalogTable.name().c_str());
delete [] columnNames;
return false;
}
// check if the column does not have an int type
if ((catalog_colref->column()->type() != VALUE_TYPE_TINYINT) &&
(catalog_colref->column()->type() != VALUE_TYPE_SMALLINT) &&
(catalog_colref->column()->type() != VALUE_TYPE_INTEGER) &&
(catalog_colref->column()->type() != VALUE_TYPE_BIGINT)) {
isIntsOnly = false;
}
index_columns[catalog_colref->index()] = catalog_colref->column()->index();
column_types[catalog_colref->index()] = (ValueType) catalog_colref->column()->type();
}
TableIndexScheme index_scheme(catalog_index->name(),
(TableIndexType)catalog_index->type(),
index_columns,
column_types,
catalog_index->unique(),
isIntsOnly,
schema);
index_map[catalog_index->name()] = index_scheme;
}
// Constraints
string pkey_index_id;
map<string, catalog::Constraint*>::const_iterator constraint_iterator;
for (constraint_iterator = catalogTable.constraints().begin();
constraint_iterator != catalogTable.constraints().end();
constraint_iterator++) {
catalog::Constraint *catalog_constraint = constraint_iterator->second;
// Constraint Type
ConstraintType type = (ConstraintType)catalog_constraint->type();
switch (type) {
case CONSTRAINT_TYPE_PRIMARY_KEY:
// Make sure we have an index to use
if (catalog_constraint->index() == NULL) {
VOLT_ERROR("The '%s' constraint '%s' on table '%s' does"
" not specify an index",
constraintutil::getTypeName(type).c_str(),
catalog_constraint->name().c_str(),
catalogTable.name().c_str());
delete [] columnNames;
return false;
}
// Make sure they didn't declare more than one primary key index
else if (pkey_index_id.size() > 0) {
VOLT_ERROR("Trying to declare a primary key on table '%s'"
"using index '%s' but '%s' was already set as"
" the primary key",
catalogTable.name().c_str(),
catalog_constraint->index()->name().c_str(),
pkey_index_id.c_str());
delete [] columnNames;
return false;
}
pkey_index_id = catalog_constraint->index()->name();
break;
case CONSTRAINT_TYPE_UNIQUE:
// Make sure we have an index to use
// TODO: In the future I would like bring back my Constraint
// object so that we can keep track of everything that a
// table has...
if (catalog_constraint->index() == NULL) {
VOLT_ERROR("The '%s' constraint '%s' on table '%s' does"
" not specify an index",
constraintutil::getTypeName(type).c_str(),
catalog_constraint->name().c_str(),
catalogTable.name().c_str());
delete [] columnNames;
return false;
}
break;
// Unsupported
case CONSTRAINT_TYPE_CHECK:
case CONSTRAINT_TYPE_FOREIGN_KEY:
case CONSTRAINT_TYPE_MAIN:
VOLT_WARN("Unsupported type '%s' for constraint '%s'",
constraintutil::getTypeName(type).c_str(),
catalog_constraint->name().c_str());
break;
// Unknown
default:
VOLT_ERROR("Invalid constraint type '%s' for '%s'",
constraintutil::getTypeName(type).c_str(),
catalog_constraint->name().c_str());
delete [] columnNames;
return false;
}
}
// Build the index array
vector<TableIndexScheme> indexes;
TableIndexScheme pkey_index;
map<string, TableIndexScheme>::const_iterator index_iterator;
for (index_iterator = index_map.begin(); index_iterator != index_map.end();
index_iterator++) {
// Exclude the primary key
if (index_iterator->first.compare(pkey_index_id) == 0) {
pkey_index = index_iterator->second;
// Just add it to the list
} else {
indexes.push_back(index_iterator->second);
}
}
// partition column:
const catalog::Column* partitionColumn = catalogTable.partitioncolumn();
int partitionColumnIndex = -1;
if (partitionColumn != NULL) {
partitionColumnIndex = partitionColumn->index();
}
if (pkey_index_id.size() == 0) {
int32_t databaseId = catalogDatabase.relativeIndex();
m_table = TableFactory::getPersistentTable(databaseId, executorContext,
catalogTable.name(), schema, columnNames,
indexes, partitionColumnIndex,
isExportEnabledForTable(catalogDatabase, table_id),
isTableExportOnly(catalogDatabase, table_id));
} else {
int32_t databaseId = catalogDatabase.relativeIndex();
m_table = TableFactory::getPersistentTable(databaseId, executorContext,
catalogTable.name(), schema, columnNames,
pkey_index, indexes, partitionColumnIndex,
isExportEnabledForTable(catalogDatabase, table_id),
isTableExportOnly(catalogDatabase, table_id));
}
delete[] columnNames;
m_exportEnabled = isExportEnabledForTable(catalogDatabase, table_id);
m_table->incrementRefcount();
return 0;
}