SQL 错误 [42601]：错误：“where”位置或附近的语法错误：234

Question

Merge /*+ parallel (16)*/ into psx_cluster_audit_t_1 a 
using psx_cluster_cross_ref_t_1  b 
on (
        a.psx_id=b.RECORD_ID
    and a.PSX_BATCH_ID=b.PSX_BATCH_ID
    and b.psx_batch_id='2411121519014999'
)
when matched then update set mpc_new=b.mpc where a.mpc_new is null

以上查询给出：

SQL 错误 [42601]：错误：“where”处或附近的语法错误 位置：postgresql 中的 234 错误

我尝试使用其他子句，例如 ON

Answer 1

MERGE /*+ parallel (16)*/ INTO psx_cluster_audit_t_1 a 
USING psx_cluster_cross_ref_t_1 b 
ON (
    a.psx_id = b.RECORD_ID
    AND a.PSX_BATCH_ID = b.PSX_BATCH_ID
    AND b.psx_batch_id = '2411121519014999'
)
WHEN MATCHED THEN 
    UPDATE SET a.mpc_new = b.mpc 
    WHERE a.mpc_new IS NULL;

试试这个