colexec: remove UNSAFEGET

gcassert now supports marking methods as inlined, so we can guarantee
that methods are inlined without having to insert a comment on each
callsite.

go.mod

@@ -92,7 +92,7 @@ require (
 	github.com/jackc/pgx v3.6.2+incompatible
 	github.com/jaegertracing/jaeger v1.17.0
 	github.com/jcmturner/gofork v1.0.0 // indirect
-	github.com/jordanlewis/gcassert v0.0.0-20200630054945-8ff878e72753
+	github.com/jordanlewis/gcassert v0.0.0-20200706043056-bf61eb72ee48
 	github.com/kevinburke/go-bindata v3.13.0+incompatible
 	github.com/kisielk/errcheck v1.2.0
 	github.com/kisielk/gotool v1.0.0
@@ -154,7 +154,7 @@ require (
 	golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae
 	golang.org/x/text v0.3.2
 	golang.org/x/time v0.0.0-20190308202827-9d24e82272b4
-	golang.org/x/tools v0.0.0-20200626171337-aa94e735be7f
+	golang.org/x/tools v0.0.0-20200702044944-0cc1aa72b347
 	google.golang.org/api v0.1.0
 	google.golang.org/genproto v0.0.0-20200218151345-dad8c97a84f5 // indirect
 	google.golang.org/grpc v1.29.1

go.sum

@@ -374,8 +374,8 @@ github.com/jcmturner/gofork v1.0.0/go.mod h1:MK8+TM0La+2rjBD4jE12Kj1pCCxK7d2LK/U
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af h1:pmfjZENx5imkbgOkpRUYLnmbU7UEFbjtDA2hxJ1ichM=
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
-github.com/jordanlewis/gcassert v0.0.0-20200630054945-8ff878e72753 h1:FXipXC++4uw5v41AxCRFoxoGnQJBuEsObAy9q3a8uww=
-github.com/jordanlewis/gcassert v0.0.0-20200630054945-8ff878e72753/go.mod h1:Qc93dJSt1iLNJCuG9Gy9ds0k/oh4ckhXGkD4AI3cEtM=
+github.com/jordanlewis/gcassert v0.0.0-20200706043056-bf61eb72ee48 h1:d1Ov7s7RbMdHcgE1Eh1CxR+yd2TTKYOCHZf92Tm/fLs=
+github.com/jordanlewis/gcassert v0.0.0-20200706043056-bf61eb72ee48/go.mod h1:Qc93dJSt1iLNJCuG9Gy9ds0k/oh4ckhXGkD4AI3cEtM=
 github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/json-iterator/go v1.1.7/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
@@ -742,6 +742,8 @@ golang.org/x/tools v0.0.0-20200509030707-2212a7e161a5 h1:MeC2gMlMdkd67dn17MEby3r
 golang.org/x/tools v0.0.0-20200509030707-2212a7e161a5/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200626171337-aa94e735be7f h1:JcoF/bowzCDI+MXu1yLqQGNO3ibqWsWq+Sk7pOT218w=
 golang.org/x/tools v0.0.0-20200626171337-aa94e735be7f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20200702044944-0cc1aa72b347 h1:/e4fNMHdLn7SQSxTrRZTma2xjQW6ELdxcnpqMhpo9X4=
+golang.org/x/tools v0.0.0-20200702044944-0cc1aa72b347/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=

pkg/col/coldata/bytes.go

@@ -105,6 +105,7 @@ func (b *Bytes) maybeBackfillOffsets(i int) {
 // unsafe for reuse if any write operation happens.
 // NOTE: if ith element was never set in any way, the behavior of Get is
 // undefined.
+//gcassert:inline
 func (b *Bytes) Get(i int) []byte {
 	return b.data[b.offsets[i]:b.offsets[i+1]]
 }

pkg/col/coldata/datum_vec.go

@@ -19,7 +19,8 @@ type Datum interface{}
 // tree.Datums in the vectorized engine. In order to avoid import of 'tree'
 // package the implementation of DatumVec lives in 'coldataext' package.
 type DatumVec interface {
-	// Get returns the datum at index i in the vector.
+	// Get returns the datum at index i in the vector. The datum cannot be used
+	// anymore once the vector is modified.
 	Get(i int) Datum
 	// Set sets the datum at index i in the vector. It must check whether the
 	// provided datum is compatible with the type that the DatumVec stores.

pkg/col/coldata/native_types.go

@@ -41,28 +41,44 @@ type Times []time.Time
 // Durations is a slice of duration.Duration.
 type Durations []duration.Duration
 
-// Get returns the element at index idx of the vector.
+// Get returns the element at index idx of the vector. The element cannot be
+// used anymore once the vector is modified.
+//gcassert:inline
 func (c Bools) Get(idx int) bool { return c[idx] }
 
-// Get returns the element at index idx of the vector.
+// Get returns the element at index idx of the vector. The element cannot be
+// used anymore once the vector is modified.
+//gcassert:inline
 func (c Int16s) Get(idx int) int16 { return c[idx] }
 
-// Get returns the element at index idx of the vector.
+// Get returns the element at index idx of the vector. The element cannot be
+// used anymore once the vector is modified.
+//gcassert:inline
 func (c Int32s) Get(idx int) int32 { return c[idx] }
 
-// Get returns the element at index idx of the vector.
+// Get returns the element at index idx of the vector. The element cannot be
+// used anymore once the vector is modified.
+//gcassert:inline
 func (c Int64s) Get(idx int) int64 { return c[idx] }
 
-// Get returns the element at index idx of the vector.
+// Get returns the element at index idx of the vector. The element cannot be
+// used anymore once the vector is modified.
+//gcassert:inline
 func (c Float64s) Get(idx int) float64 { return c[idx] }
 
-// Get returns the element at index idx of the vector.
+// Get returns the element at index idx of the vector. The element cannot be
+// used anymore once the vector is modified.
+//gcassert:inline
 func (c Decimals) Get(idx int) apd.Decimal { return c[idx] }
 
-// Get returns the element at index idx of the vector.
+// Get returns the element at index idx of the vector. The element cannot be
+// used anymore once the vector is modified.
+//gcassert:inline
 func (c Times) Get(idx int) time.Time { return c[idx] }
 
-// Get returns the element at index idx of the vector.
+// Get returns the element at index idx of the vector. The element cannot be
+// used anymore once the vector is modified.
+//gcassert:inline
 func (c Durations) Get(idx int) duration.Duration { return c[idx] }
 
 // Len returns the length of the vector.