Gen4: extracting routing information from predicates for system tables #8480
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harshit-gangal
added
Component: Query Serving
Type: Enhancement
… query Signed-off-by: Harshit Gangal <harshit@planetscale.com>
…ed all system tables plan tests into its own file Signed-off-by: Harshit Gangal <harshit@planetscale.com>
…e them to validate that all the tables points to same keyspace routing Signed-off-by: Harshit Gangal <harshit@planetscale.com>
Signed-off-by: Harshit Gangal <harshit@planetscale.com>
Signed-off-by: Harshit Gangal <harshit@planetscale.com>
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…ault keyspace is not set Signed-off-by: Harshit Gangal <harshit@planetscale.com>
frouioui
approved these changes
Jul 19, 2021
Comment on lines
+472
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| ksName := "" | ||
| if vschema.keyspace != nil { | ||
| ksName = vschema.keyspace.Name | ||
| } |
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We can probably extract this. We use the same snippet in three different places
…re not information_schema queries Signed-off-by: Harshit Gangal <harshit@planetscale.com>
Signed-off-by: Harshit Gangal <harshit@planetscale.com>
systay
reviewed
Jul 20, 2021
| @@ -95,6 +97,10 @@ type ( | |||
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| // columns needed to feed other plans` | |||
| columns []*sqlparser.ColName | |||
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| // The following two fields are used when routing information_schema queries | |||
| SysTableTableSchema []evalengine.Expr | |||
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hmm... we are using sqlparser.Expr for predicates here. feels icky to mix both parser stuff and evalengine stuff in the same struct. would it make sense to keep this as AST elements and turn them into evalengine thingies in the jointree_transformers?
systay
approved these changes
Jul 20, 2021
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Will address review comments in following PR |
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Description
Add support for information_schema queries in Gen4. This also works if CNF rewriting is required.
Related Issue(s)
#7280
Checklist
Deployment Notes