我希望使用WireCompression连接到Firebird Server 3.0。自3.0版以来，这是一项新功能，我很难做到这一点，而我能找到的唯一文献记录的指令是在firebird.conf中将WireCompression设置为TRUE，并使用连接参数“ wirecompression = true”。
这是我到目前为止的内容：
firebird.conf：
# Firebird configuration file for Firebird 3.0 64-bit SuperServer
# Optimized by IBSurgeon (www.ib-aid.com) for HQbird distribution.
#
ServerMode = Super
#DatabaseAccess = Full
#RemoteAccess = true
#ExternalFileAccess = None
#UdfAccess = Restrict UDF
#TempDirectories =
#AuditTraceConfigFile =
#MaxUserTraceLogSize = 10
DefaultDbCachePages = 50000
#DatabaseGrowthIncrement = 128M
#FileSystemCacheThreshold = 64K
#FileSystemCacheSize = 0
#RemoteFileOpenAbility = 0
TempBlockSize = 2M
TempCacheLimit = 364M
AuthServer = Srp
AuthClient = Srp, Win_Sspi, Legacy_Auth
UserManager = …我遇到一些常用查询的性能问题.
SELECT
v.id,
coalesce((SELECT sum(amount) FROM artjournal WHERE variant_ref=v.id AND storage_ref=1 AND atype_ref in (1,3,4)), 0) "fv",
coalesce((SELECT sum(amount) FROM artjournal WHERE variant_ref=v.id AND storage_ref=1 AND atype_ref=2), 0) "ivo",
coalesce((SELECT sum(amount) FROM artjournal WHERE variant_ref=v.id AND storage_ref=1 AND atype_ref=5), 0) "iio",
coalesce((SELECT sum(amount * mvalue) FROM artjournal WHERE variant_ref=v.id AND storage_ref=1), 0) "vw"
FROM productvariant v
因为artjournal是一张大桌子,每天都有成千上万的新唱片,演出变得越来越糟糕.
我有所有ID字段的索引.
有没有办法重写这个语句来加快速度？或者我可以使用不同的方式从artjournal表中检索数据,如果结果为null,则返回0？
谢谢你的想法,
克里斯蒂安