如何使用postgresql simple检索JSON jsonb值?
我在postgresql数据库中有一列(如何使用postgresql simple检索JSON jsonb值?,postgresql,haskell,postgresql-simple,Postgresql,Haskell,Postgresql Simple,我在postgresql数据库中有一列(jsonExample),类型为jsonb selectCALogs :: IO [(Int, Object)] selectCALogs = do con <- connection query_ con "select \"clusterId\", \"jsonExample\" from cluster" selectCALogs::IO[(Int,Object)] 选择Calogs=do con查看这里的FromField实例(),
jsonExample
),类型为jsonb
selectCALogs :: IO [(Int, Object)]
selectCALogs = do
con <- connection
query_ con "select \"clusterId\", \"jsonExample\" from cluster"
selectCALogs::IO[(Int,Object)]
选择Calogs=do
con查看这里的FromField
实例(),我意识到它应该是值,而不是对象
因此:
selectCALogs :: IO [(Int, Value)]
selectCALogs = do
con <- connection
query_ con "select \"clusterId\", \"jsonExample\" from cluster"
selectCALogs::IO[(Int,Value)]
选择Calogs=do
con查看这里的FromField
实例(),我意识到它应该是值,而不是对象
因此:
selectCALogs :: IO [(Int, Value)]
selectCALogs = do
con <- connection
query_ con "select \"clusterId\", \"jsonExample\" from cluster"
selectCALogs::IO[(Int,Value)]
选择Calogs=do
反对的论点