sql_parser::StringRef name;

SqlType type;

uint16_t ordinal; // 0-based position in table

bool nullable;

sql_parser::StringRef schema_name; // empty if default/no schema

sql_parser::StringRef table_name;

const ColumnInfo* columns;

uint16_t column_count;

sql_parser::StringRef alias; // table alias (empty if no alias)

const char* name;

SqlType type;

bool nullable = true;

virtual ~Catalog() = default;

// Find a table by unqualified name. Returns nullptr if not found.

virtual const TableInfo* get_table(sql_parser::StringRef name) const = 0;

// Find a table by qualified name (schema.table). Returns nullptr if not found.

virtual const TableInfo* get_table(sql_parser::StringRef schema,

sql_parser::StringRef table) const = 0;

// Find a column in a table by name. Returns nullptr if not found.

virtual const ColumnInfo* get_column(const TableInfo* table,

sql_parser::StringRef column_name) const = 0;

// Register a pre-built TableInfo (e.g., for CTEs). Default: no-op.

virtual void register_table(const TableInfo* /*table*/) {}