diff --git a/proto/cmd/ch-gen-col/main.go.tmpl b/proto/cmd/ch-gen-col/main.go.tmpl
index 574e5d3..f9ca4d2 100644
--- a/proto/cmd/ch-gen-col/main.go.tmpl
+++ b/proto/cmd/ch-gen-col/main.go.tmpl
@@ -44,7 +44,7 @@ func (c *{{ .Type }}) AppendArr(vs []{{ .ElemType }})  {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for {{ .Name }} .
+// LowCardinality returns LowCardinality for {{ .Name }}.
 func (c *{{ .Type }}) LowCardinality() *ColLowCardinality[{{ .ElemType }}] {
 	return &ColLowCardinality[{{ .ElemType }}]{
 		index: c,
diff --git a/proto/col_date.go b/proto/col_date.go
index 5bf75b3..4483739 100644
--- a/proto/col_date.go
+++ b/proto/col_date.go
@@ -20,7 +20,7 @@ func (c ColDate) Row(i int) time.Time {
 	return c[i].Time()
 }
 
-// LowCardinality returns LowCardinality for Enum8 .
+// LowCardinality returns LowCardinality for Enum8.
 func (c *ColDate) LowCardinality() *ColLowCardinality[time.Time] {
 	return &ColLowCardinality[time.Time]{
 		index: c,
diff --git a/proto/col_date32.go b/proto/col_date32.go
index 38f1a91..8daa68b 100644
--- a/proto/col_date32.go
+++ b/proto/col_date32.go
@@ -20,7 +20,7 @@ func (c ColDate32) Row(i int) time.Time {
 	return c[i].Time()
 }
 
-// LowCardinality returns LowCardinality for Enum8 .
+// LowCardinality returns LowCardinality for Enum8.
 func (c *ColDate32) LowCardinality() *ColLowCardinality[time.Time] {
 	return &ColLowCardinality[time.Time]{
 		index: c,
diff --git a/proto/col_datetime.go b/proto/col_datetime.go
index 4243f2b..7ec0e7f 100644
--- a/proto/col_datetime.go
+++ b/proto/col_datetime.go
@@ -75,7 +75,7 @@ func (c *ColDateTime) AppendArr(vs []time.Time) {
 	c.Data = append(c.Data, dates...)
 }
 
-// LowCardinality returns LowCardinality for Enum8 .
+// LowCardinality returns LowCardinality for Enum8.
 func (c *ColDateTime) LowCardinality() *ColLowCardinality[time.Time] {
 	return &ColLowCardinality[time.Time]{
 		index: c,
diff --git a/proto/col_decimal128_gen.go b/proto/col_decimal128_gen.go
index 18811ac..775acbb 100644
--- a/proto/col_decimal128_gen.go
+++ b/proto/col_decimal128_gen.go
@@ -42,7 +42,7 @@ func (c *ColDecimal128) AppendArr(vs []Decimal128) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Decimal128 .
+// LowCardinality returns LowCardinality for Decimal128.
 func (c *ColDecimal128) LowCardinality() *ColLowCardinality[Decimal128] {
 	return &ColLowCardinality[Decimal128]{
 		index: c,
diff --git a/proto/col_decimal256_gen.go b/proto/col_decimal256_gen.go
index ad96b27..7bb2ffa 100644
--- a/proto/col_decimal256_gen.go
+++ b/proto/col_decimal256_gen.go
@@ -42,7 +42,7 @@ func (c *ColDecimal256) AppendArr(vs []Decimal256) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Decimal256 .
+// LowCardinality returns LowCardinality for Decimal256.
 func (c *ColDecimal256) LowCardinality() *ColLowCardinality[Decimal256] {
 	return &ColLowCardinality[Decimal256]{
 		index: c,
diff --git a/proto/col_decimal32_gen.go b/proto/col_decimal32_gen.go
index 2c4f4ea..e26ec6f 100644
--- a/proto/col_decimal32_gen.go
+++ b/proto/col_decimal32_gen.go
@@ -42,7 +42,7 @@ func (c *ColDecimal32) AppendArr(vs []Decimal32) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Decimal32 .
+// LowCardinality returns LowCardinality for Decimal32.
 func (c *ColDecimal32) LowCardinality() *ColLowCardinality[Decimal32] {
 	return &ColLowCardinality[Decimal32]{
 		index: c,
diff --git a/proto/col_decimal64_gen.go b/proto/col_decimal64_gen.go
index c37ffcd..bfb06b9 100644
--- a/proto/col_decimal64_gen.go
+++ b/proto/col_decimal64_gen.go
@@ -42,7 +42,7 @@ func (c *ColDecimal64) AppendArr(vs []Decimal64) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Decimal64 .
+// LowCardinality returns LowCardinality for Decimal64.
 func (c *ColDecimal64) LowCardinality() *ColLowCardinality[Decimal64] {
 	return &ColLowCardinality[Decimal64]{
 		index: c,
diff --git a/proto/col_enum16_gen.go b/proto/col_enum16_gen.go
index 3f99c64..406e232 100644
--- a/proto/col_enum16_gen.go
+++ b/proto/col_enum16_gen.go
@@ -42,7 +42,7 @@ func (c *ColEnum16) AppendArr(vs []Enum16) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Enum16 .
+// LowCardinality returns LowCardinality for Enum16.
 func (c *ColEnum16) LowCardinality() *ColLowCardinality[Enum16] {
 	return &ColLowCardinality[Enum16]{
 		index: c,
diff --git a/proto/col_enum8_gen.go b/proto/col_enum8_gen.go
index a063eaf..c9c3e43 100644
--- a/proto/col_enum8_gen.go
+++ b/proto/col_enum8_gen.go
@@ -42,7 +42,7 @@ func (c *ColEnum8) AppendArr(vs []Enum8) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Enum8 .
+// LowCardinality returns LowCardinality for Enum8.
 func (c *ColEnum8) LowCardinality() *ColLowCardinality[Enum8] {
 	return &ColLowCardinality[Enum8]{
 		index: c,
diff --git a/proto/col_fixedstr128_gen.go b/proto/col_fixedstr128_gen.go
index cb76953..130b7be 100644
--- a/proto/col_fixedstr128_gen.go
+++ b/proto/col_fixedstr128_gen.go
@@ -42,7 +42,7 @@ func (c *ColFixedStr128) AppendArr(vs [][128]byte) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for FixedStr128 .
+// LowCardinality returns LowCardinality for FixedStr128.
 func (c *ColFixedStr128) LowCardinality() *ColLowCardinality[[128]byte] {
 	return &ColLowCardinality[[128]byte]{
 		index: c,
diff --git a/proto/col_fixedstr16_gen.go b/proto/col_fixedstr16_gen.go
index adfc2de..765a418 100644
--- a/proto/col_fixedstr16_gen.go
+++ b/proto/col_fixedstr16_gen.go
@@ -42,7 +42,7 @@ func (c *ColFixedStr16) AppendArr(vs [][16]byte) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for FixedStr16 .
+// LowCardinality returns LowCardinality for FixedStr16.
 func (c *ColFixedStr16) LowCardinality() *ColLowCardinality[[16]byte] {
 	return &ColLowCardinality[[16]byte]{
 		index: c,
diff --git a/proto/col_fixedstr256_gen.go b/proto/col_fixedstr256_gen.go
index 1e2d955..da65261 100644
--- a/proto/col_fixedstr256_gen.go
+++ b/proto/col_fixedstr256_gen.go
@@ -42,7 +42,7 @@ func (c *ColFixedStr256) AppendArr(vs [][256]byte) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for FixedStr256 .
+// LowCardinality returns LowCardinality for FixedStr256.
 func (c *ColFixedStr256) LowCardinality() *ColLowCardinality[[256]byte] {
 	return &ColLowCardinality[[256]byte]{
 		index: c,
diff --git a/proto/col_fixedstr32_gen.go b/proto/col_fixedstr32_gen.go
index 90adba9..052bae3 100644
--- a/proto/col_fixedstr32_gen.go
+++ b/proto/col_fixedstr32_gen.go
@@ -42,7 +42,7 @@ func (c *ColFixedStr32) AppendArr(vs [][32]byte) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for FixedStr32 .
+// LowCardinality returns LowCardinality for FixedStr32.
 func (c *ColFixedStr32) LowCardinality() *ColLowCardinality[[32]byte] {
 	return &ColLowCardinality[[32]byte]{
 		index: c,
diff --git a/proto/col_fixedstr512_gen.go b/proto/col_fixedstr512_gen.go
index 09837fa..529ba31 100644
--- a/proto/col_fixedstr512_gen.go
+++ b/proto/col_fixedstr512_gen.go
@@ -42,7 +42,7 @@ func (c *ColFixedStr512) AppendArr(vs [][512]byte) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for FixedStr512 .
+// LowCardinality returns LowCardinality for FixedStr512.
 func (c *ColFixedStr512) LowCardinality() *ColLowCardinality[[512]byte] {
 	return &ColLowCardinality[[512]byte]{
 		index: c,
diff --git a/proto/col_fixedstr64_gen.go b/proto/col_fixedstr64_gen.go
index 38849cc..ad31715 100644
--- a/proto/col_fixedstr64_gen.go
+++ b/proto/col_fixedstr64_gen.go
@@ -42,7 +42,7 @@ func (c *ColFixedStr64) AppendArr(vs [][64]byte) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for FixedStr64 .
+// LowCardinality returns LowCardinality for FixedStr64.
 func (c *ColFixedStr64) LowCardinality() *ColLowCardinality[[64]byte] {
 	return &ColLowCardinality[[64]byte]{
 		index: c,
diff --git a/proto/col_fixedstr8_gen.go b/proto/col_fixedstr8_gen.go
index a58723e..a233df7 100644
--- a/proto/col_fixedstr8_gen.go
+++ b/proto/col_fixedstr8_gen.go
@@ -42,7 +42,7 @@ func (c *ColFixedStr8) AppendArr(vs [][8]byte) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for FixedStr8 .
+// LowCardinality returns LowCardinality for FixedStr8.
 func (c *ColFixedStr8) LowCardinality() *ColLowCardinality[[8]byte] {
 	return &ColLowCardinality[[8]byte]{
 		index: c,
diff --git a/proto/col_float32_gen.go b/proto/col_float32_gen.go
index 7031f11..01a35f3 100644
--- a/proto/col_float32_gen.go
+++ b/proto/col_float32_gen.go
@@ -42,7 +42,7 @@ func (c *ColFloat32) AppendArr(vs []float32) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Float32 .
+// LowCardinality returns LowCardinality for Float32.
 func (c *ColFloat32) LowCardinality() *ColLowCardinality[float32] {
 	return &ColLowCardinality[float32]{
 		index: c,
diff --git a/proto/col_float64_gen.go b/proto/col_float64_gen.go
index c210eb8..4df408c 100644
--- a/proto/col_float64_gen.go
+++ b/proto/col_float64_gen.go
@@ -42,7 +42,7 @@ func (c *ColFloat64) AppendArr(vs []float64) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Float64 .
+// LowCardinality returns LowCardinality for Float64.
 func (c *ColFloat64) LowCardinality() *ColLowCardinality[float64] {
 	return &ColLowCardinality[float64]{
 		index: c,
diff --git a/proto/col_int128_gen.go b/proto/col_int128_gen.go
index 5e982c4..3ff6e76 100644
--- a/proto/col_int128_gen.go
+++ b/proto/col_int128_gen.go
@@ -42,7 +42,7 @@ func (c *ColInt128) AppendArr(vs []Int128) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Int128 .
+// LowCardinality returns LowCardinality for Int128.
 func (c *ColInt128) LowCardinality() *ColLowCardinality[Int128] {
 	return &ColLowCardinality[Int128]{
 		index: c,
diff --git a/proto/col_int16_gen.go b/proto/col_int16_gen.go
index 212801d..d2d0795 100644
--- a/proto/col_int16_gen.go
+++ b/proto/col_int16_gen.go
@@ -42,7 +42,7 @@ func (c *ColInt16) AppendArr(vs []int16) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Int16 .
+// LowCardinality returns LowCardinality for Int16.
 func (c *ColInt16) LowCardinality() *ColLowCardinality[int16] {
 	return &ColLowCardinality[int16]{
 		index: c,
diff --git a/proto/col_int256_gen.go b/proto/col_int256_gen.go
index 5d7454b..05c5073 100644
--- a/proto/col_int256_gen.go
+++ b/proto/col_int256_gen.go
@@ -42,7 +42,7 @@ func (c *ColInt256) AppendArr(vs []Int256) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Int256 .
+// LowCardinality returns LowCardinality for Int256.
 func (c *ColInt256) LowCardinality() *ColLowCardinality[Int256] {
 	return &ColLowCardinality[Int256]{
 		index: c,
diff --git a/proto/col_int32_gen.go b/proto/col_int32_gen.go
index 46b0958..63d4cdd 100644
--- a/proto/col_int32_gen.go
+++ b/proto/col_int32_gen.go
@@ -42,7 +42,7 @@ func (c *ColInt32) AppendArr(vs []int32) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Int32 .
+// LowCardinality returns LowCardinality for Int32.
 func (c *ColInt32) LowCardinality() *ColLowCardinality[int32] {
 	return &ColLowCardinality[int32]{
 		index: c,
diff --git a/proto/col_int64_gen.go b/proto/col_int64_gen.go
index 4c8875c..01061c0 100644
--- a/proto/col_int64_gen.go
+++ b/proto/col_int64_gen.go
@@ -42,7 +42,7 @@ func (c *ColInt64) AppendArr(vs []int64) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Int64 .
+// LowCardinality returns LowCardinality for Int64.
 func (c *ColInt64) LowCardinality() *ColLowCardinality[int64] {
 	return &ColLowCardinality[int64]{
 		index: c,
diff --git a/proto/col_int8_gen.go b/proto/col_int8_gen.go
index 98a71a2..32f3003 100644
--- a/proto/col_int8_gen.go
+++ b/proto/col_int8_gen.go
@@ -42,7 +42,7 @@ func (c *ColInt8) AppendArr(vs []int8) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for Int8 .
+// LowCardinality returns LowCardinality for Int8.
 func (c *ColInt8) LowCardinality() *ColLowCardinality[int8] {
 	return &ColLowCardinality[int8]{
 		index: c,
diff --git a/proto/col_ipv4_gen.go b/proto/col_ipv4_gen.go
index 4c7a0bc..7559e79 100644
--- a/proto/col_ipv4_gen.go
+++ b/proto/col_ipv4_gen.go
@@ -42,7 +42,7 @@ func (c *ColIPv4) AppendArr(vs []IPv4) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for IPv4 .
+// LowCardinality returns LowCardinality for IPv4.
 func (c *ColIPv4) LowCardinality() *ColLowCardinality[IPv4] {
 	return &ColLowCardinality[IPv4]{
 		index: c,
diff --git a/proto/col_ipv6_gen.go b/proto/col_ipv6_gen.go
index 5907bd7..cff4ee9 100644
--- a/proto/col_ipv6_gen.go
+++ b/proto/col_ipv6_gen.go
@@ -42,7 +42,7 @@ func (c *ColIPv6) AppendArr(vs []IPv6) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for IPv6 .
+// LowCardinality returns LowCardinality for IPv6.
 func (c *ColIPv6) LowCardinality() *ColLowCardinality[IPv6] {
 	return &ColLowCardinality[IPv6]{
 		index: c,
diff --git a/proto/col_uint128_gen.go b/proto/col_uint128_gen.go
index e34f07e..58b83a3 100644
--- a/proto/col_uint128_gen.go
+++ b/proto/col_uint128_gen.go
@@ -42,7 +42,7 @@ func (c *ColUInt128) AppendArr(vs []UInt128) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for UInt128 .
+// LowCardinality returns LowCardinality for UInt128.
 func (c *ColUInt128) LowCardinality() *ColLowCardinality[UInt128] {
 	return &ColLowCardinality[UInt128]{
 		index: c,
diff --git a/proto/col_uint16_gen.go b/proto/col_uint16_gen.go
index 7bc8ba6..4d41de4 100644
--- a/proto/col_uint16_gen.go
+++ b/proto/col_uint16_gen.go
@@ -42,7 +42,7 @@ func (c *ColUInt16) AppendArr(vs []uint16) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for UInt16 .
+// LowCardinality returns LowCardinality for UInt16.
 func (c *ColUInt16) LowCardinality() *ColLowCardinality[uint16] {
 	return &ColLowCardinality[uint16]{
 		index: c,
diff --git a/proto/col_uint256_gen.go b/proto/col_uint256_gen.go
index b68a119..0c7d912 100644
--- a/proto/col_uint256_gen.go
+++ b/proto/col_uint256_gen.go
@@ -42,7 +42,7 @@ func (c *ColUInt256) AppendArr(vs []UInt256) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for UInt256 .
+// LowCardinality returns LowCardinality for UInt256.
 func (c *ColUInt256) LowCardinality() *ColLowCardinality[UInt256] {
 	return &ColLowCardinality[UInt256]{
 		index: c,
diff --git a/proto/col_uint32_gen.go b/proto/col_uint32_gen.go
index 41abca5..4f205d2 100644
--- a/proto/col_uint32_gen.go
+++ b/proto/col_uint32_gen.go
@@ -42,7 +42,7 @@ func (c *ColUInt32) AppendArr(vs []uint32) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for UInt32 .
+// LowCardinality returns LowCardinality for UInt32.
 func (c *ColUInt32) LowCardinality() *ColLowCardinality[uint32] {
 	return &ColLowCardinality[uint32]{
 		index: c,
diff --git a/proto/col_uint64_gen.go b/proto/col_uint64_gen.go
index 4521cd4..f3471d1 100644
--- a/proto/col_uint64_gen.go
+++ b/proto/col_uint64_gen.go
@@ -42,7 +42,7 @@ func (c *ColUInt64) AppendArr(vs []uint64) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for UInt64 .
+// LowCardinality returns LowCardinality for UInt64.
 func (c *ColUInt64) LowCardinality() *ColLowCardinality[uint64] {
 	return &ColLowCardinality[uint64]{
 		index: c,
diff --git a/proto/col_uint8_gen.go b/proto/col_uint8_gen.go
index 02c0516..e34a067 100644
--- a/proto/col_uint8_gen.go
+++ b/proto/col_uint8_gen.go
@@ -42,7 +42,7 @@ func (c *ColUInt8) AppendArr(vs []uint8) {
 	*c = append(*c, vs...)
 }
 
-// LowCardinality returns LowCardinality for UInt8 .
+// LowCardinality returns LowCardinality for UInt8.
 func (c *ColUInt8) LowCardinality() *ColLowCardinality[uint8] {
 	return &ColLowCardinality[uint8]{
 		index: c,