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support scan assign slice cap (#5634) 

* support scan assign slice cap

* fix
This commit is contained in:
jesse.tang 2022-09-22 14:50:35 +08:00 committed by GitHub
parent 5ed7b1a65e
commit 1f634c3937
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1 changed files with 7 additions and 1 deletions
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8
scan.go
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@ -248,7 +248,13 @@ func Scan(rows Rows, db *DB, mode ScanMode) {
if !update || reflectValue.Len() == 0 {
update = false
db.Statement.ReflectValue.Set(reflect.MakeSlice(reflectValue.Type(), 0, 20))
// if the slice cap is externally initialized, the externally initialized slice is directly used here
if reflectValue.Cap() == 0 {
db.Statement.ReflectValue.Set(reflect.MakeSlice(reflectValue.Type(), 0, 20))
} else {
reflectValue.SetLen(0)
db.Statement.ReflectValue.Set(reflectValue)
}
}
for initialized || rows.Next() {