From: Sebastian Harl Date: Sun, 1 Mar 2015 16:31:29 +0000 (+0100) Subject: sysdbql(7): Document typed expressions. X-Git-Tag: sysdb-0.8.0~147 X-Git-Url: https://git.tokkee.org/?p=sysdb.git;a=commitdiff_plain;h=b34c3a74068217ebeeb25954543d6693cc91c6c8 sysdbql(7): Document typed expressions. --- diff --git a/doc/sysdbql.7.txt b/doc/sysdbql.7.txt index 7ed9a11..9a16e23 100644 --- a/doc/sysdbql.7.txt +++ b/doc/sysdbql.7.txt @@ -177,6 +177,15 @@ The following fields may be queried: an attribute value with some other value, the two values will be cast to strings before comparing them. +Field expressions may be applied to parent or child nodes. For example, a +host's services are child objects and the host is the parent of the service +objects. This is done using typed expressions: + +host|service|metric.'':: + Evaluate the field in the context of the respective parent or child. + Currently, this is limited to services or metrics referencing their parent + host. + The following logical operators are supported by SysDB. Unless otherwise noted, the data types of the left hand and right hand side have to match. @@ -200,7 +209,7 @@ noted, the data types of the left hand and right hand side have to match. Checks whether a value compares less than, less than or equal to, greater than or equal, or greater than some other value. -The following arithmetic operators are supported by SysDB. Unless otherwise +The following arithmetic operators are supported by SysDB. Unless otherwise noted, the data types of the left hand and right hand side have to match. *+*::