cedardb与PostgreSQL语法兼容，但是直接运行结果是NULL，求解失败。将中间子查询的结果打印出来看出了原因。
同样的输入数据，输出的位掩码不同，比如初始化列和宫编码，数组中的元素值相同，顺序不同。
cedardb 输出
id board cols boxes 1 000000010400000000020000000000050407008000300001090000300400200050100000000806000 {12,64,32,18,1,14,137,272,129} {20,1,2,10,0,129,169,272,76}PostgreSQL输出
1 | 000000010400000000020000000000050407008000300001090000300400200050100000000806000 | {12,18,129,137,272,32,14,1,64} | {10,0,1,129,272,76,20,169,2}将相应的聚合函数array_agg(m)改为明确的排序array_agg(m ORDER BY c), 在cedardb 输出了与PostgreSQL相同的结果。
id board cols boxes 1 000000010400000000020000000000050407008000300001090000300400200050100000000806000 {12,18,129,137,272,32,14,1,64} {10,0,1,129,272,76,20,169,2}再运行完整SQL，cedardb 求解出了示例数据的结果，时间约是PostgreSQL的十分之一。
PostgreSQL输出
id | puzzle | result ----+-----------+----------- 3 | 8????????+| 812753649+ | ??36?????+| 943682175+ | ?7??9?2??+| 675491283+ | ?5???7???+| 154237896+ | ????457??+| 369845721+ | ???1???3?+| 287169534+ | ??1????68+| 521974368+ | ??85???1?+| 438526917+ | ?9????4?? | 796318452 (1 row) Time: 1211.606 ms (00:01.212)cedardb 输出
id puzzle result 3 8???????? ??36????? ?7??9?2?? ?5???7??? ????457?? ???1???3? ??1????68 ??85???1? ?9????4?? 812753649 943682175 675491283 154237896 369845721 287169534 521974368 438526917 796318452 2026-01-24 05:37:18.850220019 UTC INFO: [s] execution: (0.116115 min, 0.116115 max, 0.116115 median, 0.0% relMAD, 0.116115 avg, 0.000000 sdev, 4 scale, nan IPC, nan CPUs, nan GHz) compilation: (0.006032 min, 0.006032 max, 0.006032 median, 0.0% relMAD, 0.006032 avg, 0.000000 sdev)但是如果是多个行，cedardb就报错了，看来是在生成执行计划阶段报错，原因还需要进一步研究。
2026-01-24 11:54:10.854135438 UTC FATAL: Assertion `(x != y) && (lca(x, y) == x)` failed. /cedardb/plan/algebra/operators/Operator.cpp:280: static cedar::algebra::Operator* cedar::algebra::Operator::LinkCutNode::findContainingChild(cedar::algebra::Operator*, cedar::algebra::Operator*) CedarDB v2026-01-22 current-amd64 cedardb 0x31aff8b
)
)
