Function getDatabaseAndTable

src/Interpreters/DatabaseAndTableWithAlias.cpp:128–139

}

std::optional<DatabaseAndTableWithAlias> getDatabaseAndTable(const ASTSelectQuery & select, size_t table_number)
{
    const ASTTableExpression * table_expression = getTableExpression(select, table_number);
    if (!table_expression)
        return {};

    ASTPtr database_and_table_name = table_expression->database_and_table_name;
    if (!database_and_table_name || !database_and_table_name->as<ASTTableIdentifier>())
        return {};

    return DatabaseAndTableWithAlias(database_and_table_name);
}

bool TableWithColumnNamesAndTypes::hasColumn(const String & name) const 
{