Class IndexRetrieval

src/jrd/btr.h:187–227

// Index retrieval block -- hold stuff for index retrieval

class IndexRetrieval
{
public:
	IndexRetrieval(jrd_rel* relation, const index_desc* idx, USHORT count, temporary_key* key)
		: irb_relation(relation), irb_index(idx->idx_id),
		  irb_generic(0), irb_lower_count(count), irb_upper_count(count), irb_key(key),
		  irb_name(nullptr), irb_value(nullptr), irb_list(nullptr), irb_scale(nullptr)
	{
		memcpy(&irb_desc, idx, sizeof(irb_desc));
	}

	IndexRetrieval(MemoryPool& pool, jrd_rel* relation, const index_desc* idx,
				   const MetaName& name)
		: irb_relation(relation), irb_index(idx->idx_id),
		  irb_generic(0), irb_lower_count(0), irb_upper_count(0), irb_key(NULL),
		  irb_name(FB_NEW_POOL(pool) MetaName(name)),
		  irb_value(FB_NEW_POOL(pool) ValueExprNode*[idx->idx_count * 2]),
		  irb_list(nullptr), irb_scale(nullptr)
	{
		memcpy(&irb_desc, idx, sizeof(irb_desc));
	}

	~IndexRetrieval()
	{
		delete irb_name;
		delete[] irb_value;
		delete[] irb_scale;
	}

	index_desc irb_desc;			// Index descriptor
	jrd_rel* irb_relation;			// Relation for retrieval
	USHORT irb_index;				// Index id
	USHORT irb_generic;				// Flags for generic search
	USHORT irb_lower_count;			// Number of segments for retrieval
	USHORT irb_upper_count;			// Number of segments for retrieval
	temporary_key* irb_key;			// Key for equality retrieval
	MetaName* irb_name;				// Index name
	ValueExprNode** irb_value;		// Matching value (for equality search)
	LookupValueList* irb_list;		// Matching values list (for IN <list>)
	SSHORT* irb_scale;				// Scale for int64/int128 key
};

// Flag values for irb_generic
const int irb_partial	= 1;				// Partial match: not all segments or starting of key only