WIP

scripts/generate-system-variables.go

@@ -70,9 +70,7 @@ func skipSv(sv *variable.SysVar) bool {
 	}
 	// These svs have no documentation yet.
 	switch sv.Name {
-	case variable.ErrorCount,
-		variable.LowerCaseTableNames, variable.MaxConnections,
-		variable.MaxPreparedStmtCount,
+	case variable.ErrorCount, variable.LowerCaseTableNames, variable.MaxPreparedStmtCount,
 		variable.TiDBBatchCommit, variable.TiDBBatchDelete, variable.TiDBBatchInsert, variable.TiDBEnableChangeMultiSchema,
 		variable.TiDBEnableExchangePartition, variable.TiDBEnableExtendedStats, variable.TiDBEnablePointGetCache,
 		variable.TiDBEnableStreaming, variable.TiDBGuaranteeLinearizability, variable.TiDBTxnScope, variable.TiDBTxnReadTS,
@@ -954,12 +952,12 @@ func main() {
 		fmt.Print(printWarning(sv))
 
 		if sv.Name == variable.TxnIsolation {
-			fmt.Println("This variable is an alias for _transaction_isolation_.")
+			fmt.Println("This variable is an alias for `transaction_isolation`.")
 			fmt.Println("")
 			continue
 		}
 		if sv.Name == variable.Identity {
-			fmt.Println("This variable is an alias for _last_insert_id_.")
+			fmt.Println("This variable is an alias for `last_insert_id`.")
 			fmt.Println("")
 			continue
 		}

scripts/go.mod

@@ -15,20 +15,21 @@ require (
 	github.com/grpc-ecosystem/go-grpc-middleware v1.3.0 // indirect
 	github.com/opentracing/opentracing-go v1.2.0 // indirect
 	github.com/pingcap/failpoint v0.0.0-20210918120811-547c13e3eb00 // indirect
-	github.com/pingcap/kvproto v0.0.0-20210927053809-df38c15b57b3 // indirect
-	github.com/pingcap/tidb v1.1.0-beta.0.20210930110847-5f797c3f241c // indirect
+	github.com/pingcap/kvproto v0.0.0-20211009031853-d6dd964d6b8c // indirect
+	github.com/pingcap/tidb v1.1.0-beta.0.20211009135324-6e70be97c2e5 // indirect
 	github.com/pingcap/tidb-tools v5.2.1+incompatible // indirect
-	github.com/pingcap/tipb v0.0.0-20210917081614-311f2369c5f7 // indirect
+	github.com/pingcap/tipb v0.0.0-20211008080435-3fd327dfce0e // indirect
 	github.com/prometheus/common v0.31.1 // indirect
 	github.com/prometheus/procfs v0.7.3 // indirect
-	github.com/shirou/gopsutil v3.21.8+incompatible // indirect
+	github.com/shirou/gopsutil v3.21.9+incompatible // indirect
 	github.com/twmb/murmur3 v1.1.6 // indirect
 	github.com/uber-go/atomic v1.4.0 // indirect
 	github.com/uber/jaeger-client-go v2.29.1+incompatible // indirect
+	go.etcd.io/etcd v3.3.26+incompatible // indirect
 	go.uber.org/atomic v1.9.0 // indirect
-	golang.org/x/net v0.0.0-20210929193557-e81a3d93ecf6 // indirect
-	golang.org/x/sys v0.0.0-20210930141918-969570ce7c6c // indirect
-	google.golang.org/genproto v0.0.0-20210930144712-2e2e1008e8a3 // indirect
+	golang.org/x/net v0.0.0-20211008194852-3b03d305991f // indirect
+	golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac // indirect
+	google.golang.org/genproto v0.0.0-20211008145708-270636b82663 // indirect
 	google.golang.org/grpc v1.41.0 // indirect
 )
 

scripts/go.sum

@@ -807,6 +807,8 @@ github.com/pingcap/kvproto v0.0.0-20210806074406-317f69fb54b4 h1:4EUpHzPFHwleKkV
 github.com/pingcap/kvproto v0.0.0-20210806074406-317f69fb54b4/go.mod h1:IOdRDPLyda8GX2hE/jO7gqaCV/PNFh8BZQCQZXfIOqI=
 github.com/pingcap/kvproto v0.0.0-20210927053809-df38c15b57b3 h1:jqTAy4AwG0h05wPUywAuLOu4qGfNH1ASlrzRgXW4rzw=
 github.com/pingcap/kvproto v0.0.0-20210927053809-df38c15b57b3/go.mod h1:IOdRDPLyda8GX2hE/jO7gqaCV/PNFh8BZQCQZXfIOqI=
+github.com/pingcap/kvproto v0.0.0-20211009031853-d6dd964d6b8c h1:4BOqAbGsXniTL3mIzX5jyKmbP5Q1j2TTr36DSAQHQs0=
+github.com/pingcap/kvproto v0.0.0-20211009031853-d6dd964d6b8c/go.mod h1:IOdRDPLyda8GX2hE/jO7gqaCV/PNFh8BZQCQZXfIOqI=
 github.com/pingcap/log v0.0.0-20191012051959-b742a5d432e9/go.mod h1:4rbK1p9ILyIfb6hU7OG2CiWSqMXnp3JMbiaVJ6mvoY8=
 github.com/pingcap/log v0.0.0-20200117041106-d28c14d3b1cd/go.mod h1:4rbK1p9ILyIfb6hU7OG2CiWSqMXnp3JMbiaVJ6mvoY8=
 github.com/pingcap/log v0.0.0-20200511115504-543df19646ad/go.mod h1:4rbK1p9ILyIfb6hU7OG2CiWSqMXnp3JMbiaVJ6mvoY8=
@@ -825,6 +827,8 @@ github.com/pingcap/parser v0.0.0-20210907051057-948434fa20e4 h1:v3paTSRJgM7E/2Cq
 github.com/pingcap/parser v0.0.0-20210907051057-948434fa20e4/go.mod h1:Ek0mLKEqUGnQqBw1JnYrJQxsguU433DU68yUbsoeJ7s=
 github.com/pingcap/parser v0.0.0-20210917114242-ac711116bdff h1:LiwvvutmyeSkFkdVM09mH6KK+OeDVJzX7WKy9Lf0ri0=
 github.com/pingcap/parser v0.0.0-20210917114242-ac711116bdff/go.mod h1:+xcMiiZzdIktT/Nqdfm81dkECJ2EPuoAYywd57py4Pk=
+github.com/pingcap/parser v0.0.0-20211004012448-687005894c4e h1:dPMDpj+7ng9qEWoT3n6qjpB1ohz79uTLVM6ILW+ZMT0=
+github.com/pingcap/parser v0.0.0-20211004012448-687005894c4e/go.mod h1:+xcMiiZzdIktT/Nqdfm81dkECJ2EPuoAYywd57py4Pk=
 github.com/pingcap/pd v2.1.5+incompatible/go.mod h1:nD3+EoYes4+aNNODO99ES59V83MZSI+dFbhyr667a0E=
 github.com/pingcap/pd/v4 v4.0.0-rc.1.0.20200422143320-428acd53eba2/go.mod h1:s+utZtXDznOiL24VK0qGmtoHjjXNsscJx3m1n8cC56s=
 github.com/pingcap/sysutil v0.0.0-20200206130906-2bfa6dc40bcd/go.mod h1:EB/852NMQ+aRKioCpToQ94Wl7fktV+FNnxf3CX/TTXI=
@@ -838,6 +842,8 @@ github.com/pingcap/tidb v1.1.0-beta.0.20210910144639-8e25f8eee42f h1:rR2M6lVZWVz
 github.com/pingcap/tidb v1.1.0-beta.0.20210910144639-8e25f8eee42f/go.mod h1:3TLQ3gMhl5s2oYeJx9ROQSZz1q6qYLaps63O6hYv8uo=
 github.com/pingcap/tidb v1.1.0-beta.0.20210930110847-5f797c3f241c h1:sDKKthrFlpy3uyjrea0l+xpJTyCw+eRNviwxrkeDAd4=
 github.com/pingcap/tidb v1.1.0-beta.0.20210930110847-5f797c3f241c/go.mod h1:oay14Mbdgf+zIj5moA7hAaViIZadaAweV2NVe90rzf8=
+github.com/pingcap/tidb v1.1.0-beta.0.20211009135324-6e70be97c2e5 h1:J8SqSMuoQI+EeuA/MuWXvvnLir+EtXd9M42RL3470ys=
+github.com/pingcap/tidb v1.1.0-beta.0.20211009135324-6e70be97c2e5/go.mod h1:WQHMalPfxjTrWMSSsKsPaJsM4ErDr2/ZOF4Gpd70CGQ=
 github.com/pingcap/tidb-dashboard v0.0.0-20210312062513-eef5d6404638/go.mod h1:OzFN8H0EDMMqeulPhPMw2i2JaiZWOKFQ7zdRPhENNgo=
 github.com/pingcap/tidb-dashboard v0.0.0-20210716172320-2226872e3296/go.mod h1:OCXbZTBTIMRcIt0jFsuCakZP+goYRv6IjawKbwLS2TQ=
 github.com/pingcap/tidb-insight v0.3.1/go.mod h1:HZ6cGBYxViftTKLbl/V4moRol79bifZzI9ImGavJms0=
@@ -856,6 +862,8 @@ github.com/pingcap/tipb v0.0.0-20210802080519-94b831c6db55 h1:oxOovwOzm7VD37XpDo
 github.com/pingcap/tipb v0.0.0-20210802080519-94b831c6db55/go.mod h1:A7mrd7WHBl1o63LE2bIBGEJMTNWXqhgmYiOvMLxozfs=
 github.com/pingcap/tipb v0.0.0-20210917081614-311f2369c5f7 h1:fYfF2cI9hbJqiEuqQaKCov3ybuUaYYGBe+ozG/pU+Ls=
 github.com/pingcap/tipb v0.0.0-20210917081614-311f2369c5f7/go.mod h1:A7mrd7WHBl1o63LE2bIBGEJMTNWXqhgmYiOvMLxozfs=
+github.com/pingcap/tipb v0.0.0-20211008080435-3fd327dfce0e h1:fZY5T65QWiPc9noQJ1UkdwejZyBZjNfxzSyTcBjKrEU=
+github.com/pingcap/tipb v0.0.0-20211008080435-3fd327dfce0e/go.mod h1:A7mrd7WHBl1o63LE2bIBGEJMTNWXqhgmYiOvMLxozfs=
 github.com/pingcap/tiup v1.2.3/go.mod h1:q8WzflNHjE1U49k2qstTL0clx2pKh8pkOzUFV4RTvQo=
 github.com/pkg/browser v0.0.0-20180916011732-0a3d74bf9ce4/go.mod h1:4OwLy04Bl9Ef3GJJCoec+30X3LQs/0/m4HFRt/2LUSA=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -948,6 +956,8 @@ github.com/shirou/gopsutil v3.21.2+incompatible h1:U+YvJfjCh6MslYlIAXvPtzhW3YZEt
 github.com/shirou/gopsutil v3.21.2+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
 github.com/shirou/gopsutil v3.21.8+incompatible h1:sh0foI8tMRlCidUJR+KzqWYWxrkuuPIGiO6Vp+KXdCU=
 github.com/shirou/gopsutil v3.21.8+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
+github.com/shirou/gopsutil v3.21.9+incompatible h1:LTLpUnfX81MkHeCtSrwNKZwuW5Id6kCa7/P43NdcNn4=
+github.com/shirou/gopsutil v3.21.9+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
 github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4/go.mod h1:qsXQc7+bwAM3Q1u/4XEfrquwF8Lw7D7y5cD8CuHnfIc=
 github.com/shopspring/decimal v0.0.0-20180709203117-cd690d0c9e24/go.mod h1:M+9NzErvs504Cn4c5DxATwIqPbtswREoFCre64PpcG4=
 github.com/shopspring/decimal v0.0.0-20191125035519-b054a8dfd10d/go.mod h1:M+9NzErvs504Cn4c5DxATwIqPbtswREoFCre64PpcG4=
@@ -1292,6 +1302,8 @@ golang.org/x/net v0.0.0-20210503060351-7fd8e65b6420/go.mod h1:9nx3DQGgdP8bBQD5qx
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20210929193557-e81a3d93ecf6 h1:Z04ewVs7JhXaYkmDhBERPi41gnltfQpMWDnTnQbaCqk=
 golang.org/x/net v0.0.0-20210929193557-e81a3d93ecf6/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20211008194852-3b03d305991f h1:1scJEYZBaF48BaG6tYbtxmLcXqwYGSfGcMoStTqkkIw=
+golang.org/x/net v0.0.0-20211008194852-3b03d305991f/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -1407,6 +1419,8 @@ golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069 h1:siQdpVirKtzPhKl3lZWozZraC
 golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210930141918-969570ce7c6c h1:ayiZ33F3u3LIXB03Y5VKNdaFO79a18Fr+SB30o/KFyw=
 golang.org/x/sys v0.0.0-20210930141918-969570ce7c6c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac h1:oN6lz7iLW/YC7un8pq+9bOLyXrprv2+DKfkJY+2LJJw=
+golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -1614,6 +1628,8 @@ google.golang.org/genproto v0.0.0-20210825212027-de86158e7fda h1:iT5uhT54PtbqUsW
 google.golang.org/genproto v0.0.0-20210825212027-de86158e7fda/go.mod h1:eFjDcFEctNawg4eG61bRv87N7iHBWyVhJu7u1kqDUXY=
 google.golang.org/genproto v0.0.0-20210930144712-2e2e1008e8a3 h1:+F3FcO6LTrzNq5wp1Z6JtoBvnJzX6euyN70FoyMDXy4=
 google.golang.org/genproto v0.0.0-20210930144712-2e2e1008e8a3/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
+google.golang.org/genproto v0.0.0-20211008145708-270636b82663 h1:33YYJanAOLxgS7pGjzC1IUrFLpwN//bbgtnKYikOmQU=
+google.golang.org/genproto v0.0.0-20211008145708-270636b82663/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 google.golang.org/grpc v0.0.0-20180607172857-7a6a684ca69e/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.12.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=

system-variables.md

@@ -385,11 +385,6 @@ This variable is an alias for `last_insert_id`.
 - Default value: ""
 - This variable is used to specify a list of storage engines that might fall back to TiKV. If the execution of a SQL statement fails due to a failure of the specified storage engine in the list, TiDB retries executing this SQL statement with TiKV. This variable can be set to "" or "tiflash". When this variable is set to "tiflash", if the execution of a SQL statement fails due to a failure of TiFlash, TiDB retries executing this SQL statement with TiKV.
 
-### tidb_allow_function_for_expression_index <span class="version-mark">New in v5.2.0</span>
-
-- Scope: NONE
-- This variable is used to show the functions that are allowed to be used for creating expression indexes.
-
 ### tidb_allow_mpp <span class="version-mark">New in v5.0</span>
 
 - Scope: SESSION | GLOBAL
@@ -1536,7 +1531,7 @@ SET tidb_slow_log_threshold = 200;
 
 ### tx_isolation
 
-This variable is an alias for _transaction_isolation_.
+This variable is an alias for `transaction_isolation`.
 
 ### version