EncodeRawValue encode a value in a byte format.

EncodeRawValueAsKey encodes a value in a b-tree meaningful way.

deprecated but left to maintain backwards compatibility.

(key=M.{tableID}{indexID}({null}({val}{padding}{valLen})?)*({pkVal}{padding}{pkValLen})+, value={count (colID valLen val)+}).

(key=R.{1}{tableID}{0}({null}({pkVal}{padding}{pkValLen})?)+, value={count (colID valLen val)+}).

Catalog represents a database catalog containing metadata for all tables in the database.

DropIndexStmt represents a statement to delete a table.

DropTableStmt represents a statement to delete a table.

TODO: once InSubQueryExp is supported, this struct may become obsolete by creating a ListDataSource struct.

SQLTx (no-thread safe) represents an interactive or incremental transaction with support of RYOW.