apply table projections through Distinct nodes
#2796
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max-hoffman
approved these changes
Dec 18, 2024
max-hoffman
reviewed
Dec 18, 2024
sql/analyzer/indexed_joins.go
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| if rt, ok := ta.Child.(*plan.ResolvedTable); ok { | ||
| if t := rt.UnderlyingTable(); t != nil { | ||
| if pt, ok := t.(sql.ProjectedTable); ok { | ||
| tmpTbl := pt.WithProjections(nil) |
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sql.PrimaryKeyTable is how we do this in other places, i'm pretty sure the memo RelProps has this already
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We weren't pruning table columns when there was a distinct clause over the projections, this resulted the deserialization of every column, even if they weren't going to make it to the result. This is bad for performance, especially if the unread columns are of
TEXT,LONGTEXT, 'BLOB,LONGBLOB` type as those are stored out of band, and take longer to deserialize.fixes: dolthub/dolt#8689