infoschema, domain, ddl: fix upper cased charset names (pingcap#10272)

ddl/db_integration_test.go

@@ -267,7 +267,7 @@ func (s *testIntegrationSuite) TestChangingTableCharset(c *C) {
 	if rs != nil {
 		rs.Close()
 	}
-	c.Assert(err.Error(), Equals, "Unknown charset gbk")
+	c.Assert(err.Error(), Equals, "[parser:1115]Unknown character set: 'gbk'")
 	rs, err = tk.Exec("alter table t charset utf8 collate latin1_bin")
 	if rs != nil {
 		rs.Close()
@@ -286,6 +286,51 @@ func (s *testIntegrationSuite) TestCaseInsensitiveCharsetAndCollate(c *C) {
 	tk.MustExec("create table t2(id int) ENGINE=InnoDB DEFAULT CHARSET=Utf8 COLLATE=utf8_BIN;")
 	tk.MustExec("create table t3(id int) ENGINE=InnoDB DEFAULT CHARSET=Utf8mb4 COLLATE=utf8MB4_BIN;")
 	tk.MustExec("create table t4(id int) ENGINE=InnoDB DEFAULT CHARSET=Utf8mb4 COLLATE=utf8MB4_general_ci;")
+
+	tk.MustExec("create table t5(a varchar(20)) ENGINE=InnoDB DEFAULT CHARSET=UTF8MB4 COLLATE=UTF8MB4_GENERAL_CI;")
+	tk.MustExec("insert into t5 values ('特克斯和凯科斯群岛')")
+
+	db, ok := domain.GetDomain(tk.Se).InfoSchema().SchemaByName(model.NewCIStr("test_charset_collate"))
+	c.Assert(ok, IsTrue)
+	tbl := testGetTableByName(c, tk.Se, "test_charset_collate", "t5")
+	tblInfo := tbl.Meta().Clone()
+	c.Assert(tblInfo.Charset, Equals, "utf8mb4")
+	c.Assert(tblInfo.Columns[0].Charset, Equals, "utf8mb4")
+
+	tblInfo.Version = model.TableInfoVersion2
+	tblInfo.Charset = "UTF8MB4"
+
+	updateTableInfo := func(tblInfo *model.TableInfo) {
+		mockCtx := mock.NewContext()
+		mockCtx.Store = s.store
+		err := mockCtx.NewTxn()
+		c.Assert(err, IsNil)
+		txn, err := mockCtx.Txn(true)
+		c.Assert(err, IsNil)
+		mt := meta.NewMeta(txn)
+		c.Assert(ok, IsTrue)
+		err = mt.UpdateTable(db.ID, tblInfo)
+		c.Assert(err, IsNil)
+		err = txn.Commit(context.Background())
+		c.Assert(err, IsNil)
+	}
+	updateTableInfo(tblInfo)
+	tk.MustExec("alter table t5 add column b varchar(10);") //  load latest schema.
+
+	tblInfo = testGetTableByName(c, tk.Se, "test_charset_collate", "t5").Meta()
+	c.Assert(tblInfo.Charset, Equals, "utf8mb4")
+	c.Assert(tblInfo.Columns[0].Charset, Equals, "utf8mb4")
+
+	// For model.TableInfoVersion3, it is believed that all charsets / collations are lower-cased, do not do case-convert
+	tblInfo = tblInfo.Clone()
+	tblInfo.Version = model.TableInfoVersion3
+	tblInfo.Charset = "UTF8MB4"
+	updateTableInfo(tblInfo)
+	tk.MustExec("alter table t5 add column c varchar(10);") //  load latest schema.
+
+	tblInfo = testGetTableByName(c, tk.Se, "test_charset_collate", "t5").Meta()
+	c.Assert(tblInfo.Charset, Equals, "UTF8MB4")
+	c.Assert(tblInfo.Columns[0].Charset, Equals, "utf8mb4")
 }
 
 func newStoreWithBootstrap() (kv.Storage, *domain.Domain, error) {

ddl/db_test.go

@@ -4475,7 +4475,7 @@ func (s *testDBSuite) TestCheckTooBigFieldLength(c *C) {
 	s.testErrorCode(c, "alter table tr_04 add column b varchar(20000) charset utf8mb4;", tmysql.ErrTooBigFieldlength)
 	s.testErrorCode(c, "alter table tr_04 convert to character set utf8mb4;", tmysql.ErrTooBigFieldlength)
 	s.testErrorCode(c, "create table tr_05 (id int, name varchar(30000), purchased date )  default charset=utf8 collate=utf8_bin;", tmysql.ErrTooBigFieldlength)
-	s.testErrorCode(c, "create table tr_05 (id int, name varchar(20000) charset utf8mb4, purchased date ) default charset=utf8 collate=utf8;", tmysql.ErrTooBigFieldlength)
+	s.testErrorCode(c, "create table tr_05 (id int, name varchar(20000) charset utf8mb4, purchased date ) default charset=utf8 collate=utf8_bin;", tmysql.ErrTooBigFieldlength)
 	s.testErrorCode(c, "create table tr_05 (id int, name varchar(65536), purchased date ) default charset=latin1;", tmysql.ErrTooBigFieldlength)
 
 	s.tk.MustExec("drop table if exists tr_05;")

domain/domain.go

@@ -192,6 +192,7 @@ func (do *Domain) fetchSchemasWithTables(schemas []*model.DBInfo, m *meta.Meta,
 				// schema is not public, can't be used outside.
 				continue
 			}
+			infoschema.ConvertCharsetCollateToLowerCaseIfNeed(tbl)
 			di.Tables = append(di.Tables, tbl)
 		}
 	}

expression/integration_test.go

@@ -898,7 +898,7 @@ func (s *testIntegrationSuite) TestStringBuiltin(c *C) {
 	result.Check(testkit.Rows("'121' '0' '中文' <nil>"))
 
 	// for convert
-	result = tk.MustQuery(`select convert("123" using "866"), convert("123" using "binary"), convert("中文" using "binary"), convert("中文" using "utf8"), convert("中文" using "utf8mb4"), convert(cast("中文" as binary) using "utf8");`)
+	result = tk.MustQuery(`select convert("123" using "binary"), convert("123" using "binary"), convert("中文" using "binary"), convert("中文" using "utf8"), convert("中文" using "utf8mb4"), convert(cast("中文" as binary) using "utf8");`)
 	result.Check(testkit.Rows("123 123 中文 中文 中文 中文"))
 
 	// for insert
@@ -2286,11 +2286,8 @@ func (s *testIntegrationSuite) TestBuiltin(c *C) {
 	result.Check(testkit.Rows("ad\x01\x00Y"))
 	result = tk.MustQuery("select char(97, null, 100, 256, 89 using ascii)")
 	result.Check(testkit.Rows("ad\x01\x00Y"))
-	charRecordSet, err := tk.Exec("select char(97, null, 100, 256, 89 using tidb)")
-	c.Assert(err, IsNil)
-	c.Assert(charRecordSet, NotNil)
-	_, err = session.GetRows4Test(ctx, tk.Se, charRecordSet)
-	c.Assert(err.Error(), Equals, "unknown encoding: tidb")
+	_, err = tk.Exec("select char(97, null, 100, 256, 89 using tidb)")
+	c.Assert(err.Error(), Equals, "[parser:1115]Unknown character set: 'tidb'")
 
 	// issue 3884
 	tk.MustExec("drop table if exists t")

expression/typeinfer_test.go

@@ -455,10 +455,10 @@ func (s *testInferTypeSuite) createTestCase4StrFuncs() []typeInferTestCase {
 		{"quote(c_float_d    )", mysql.TypeVarString, charset.CharsetUTF8MB4, 0, 26, types.UnspecifiedLength},
 		{"quote(c_double_d   )", mysql.TypeVarString, charset.CharsetUTF8MB4, 0, 46, types.UnspecifiedLength},
 
-		{"convert(c_double_d using c_text_d)", mysql.TypeLongBlob, charset.CharsetUTF8MB4, 0, mysql.MaxBlobWidth, types.UnspecifiedLength},
-		{"convert(c_binary using c_text_d)", mysql.TypeLongBlob, charset.CharsetUTF8MB4, 0, mysql.MaxBlobWidth, types.UnspecifiedLength},
-		{"convert(c_binary using c_binary)", mysql.TypeLongBlob, charset.CharsetUTF8MB4, 0, mysql.MaxBlobWidth, types.UnspecifiedLength},
-		{"convert(c_text_d using c_binary)", mysql.TypeLongBlob, charset.CharsetUTF8MB4, 0, mysql.MaxBlobWidth, types.UnspecifiedLength},
+		{"convert(c_double_d using utf8mb4)", mysql.TypeLongBlob, charset.CharsetUTF8MB4, 0, mysql.MaxBlobWidth, types.UnspecifiedLength},
+		{"convert(c_binary using utf8mb4)", mysql.TypeLongBlob, charset.CharsetUTF8MB4, 0, mysql.MaxBlobWidth, types.UnspecifiedLength},
+		{"convert(c_binary using utf8mb4)", mysql.TypeLongBlob, charset.CharsetUTF8MB4, 0, mysql.MaxBlobWidth, types.UnspecifiedLength},
+		{"convert(c_text_d using utf8mb4)", mysql.TypeLongBlob, charset.CharsetUTF8MB4, 0, mysql.MaxBlobWidth, types.UnspecifiedLength},
 
 		{"insert(c_varchar, c_int_d, c_int_d, c_varchar)", mysql.TypeLongBlob, charset.CharsetUTF8MB4, 0, mysql.MaxBlobWidth, types.UnspecifiedLength},
 		{"insert(c_varchar, c_int_d, c_int_d, c_binary)", mysql.TypeLongBlob, charset.CharsetBin, mysql.BinaryFlag, mysql.MaxBlobWidth, types.UnspecifiedLength},

go.mod

@@ -48,7 +48,7 @@ require (
 	github.com/pingcap/goleveldb v0.0.0-20171020084629-8d44bfdf1030
 	github.com/pingcap/kvproto v0.0.0-20190226063853-f6c0b7ffff11
 	github.com/pingcap/log v0.0.0-20190307075452-bd41d9273596
-	github.com/pingcap/parser v0.0.0-20190421035202-497ae72425c5
+	github.com/pingcap/parser v0.0.0-20190505094039-595d728571a7
 	github.com/pingcap/pd v2.1.0-rc.4+incompatible
 	github.com/pingcap/tidb-tools v2.1.3-0.20190116051332-34c808eef588+incompatible
 	github.com/pingcap/tipb v0.0.0-20180910045846-371b48b15d93

go.sum

@@ -101,8 +101,8 @@ github.com/pingcap/kvproto v0.0.0-20190226063853-f6c0b7ffff11 h1:e81flSfRbbMW5RU
 github.com/pingcap/kvproto v0.0.0-20190226063853-f6c0b7ffff11/go.mod h1:0gwbe1F2iBIjuQ9AH0DbQhL+Dpr5GofU8fgYyXk+ykk=
 github.com/pingcap/log v0.0.0-20190307075452-bd41d9273596 h1:t2OQTpPJnrPDGlvA+3FwJptMTt6MEPdzK1Wt99oaefQ=
 github.com/pingcap/log v0.0.0-20190307075452-bd41d9273596/go.mod h1:WpHUKhNZ18v116SvGrmjkA9CBhYmuUTKL+p8JC9ANEw=
-github.com/pingcap/parser v0.0.0-20190421035202-497ae72425c5 h1:csU8uAxq5yIK6SMRtuYkiazo7cFP9iio9vSK1uh23nU=
-github.com/pingcap/parser v0.0.0-20190421035202-497ae72425c5/go.mod h1:1FNvfp9+J0wvc4kl8eGNh7Rqrxveg15jJoWo/a0uHwA=
+github.com/pingcap/parser v0.0.0-20190505094039-595d728571a7 h1:cbTQGLE0X69qL2nrvtG9HP4u5sBdVGyoIJOhc+KtJXc=
+github.com/pingcap/parser v0.0.0-20190505094039-595d728571a7/go.mod h1:1FNvfp9+J0wvc4kl8eGNh7Rqrxveg15jJoWo/a0uHwA=
 github.com/pingcap/pd v2.1.0-rc.4+incompatible h1:/buwGk04aHO5odk/+O8ZOXGs4qkUjYTJ2UpCJXna8NE=
 github.com/pingcap/pd v2.1.0-rc.4+incompatible/go.mod h1:nD3+EoYes4+aNNODO99ES59V83MZSI+dFbhyr667a0E=
 github.com/pingcap/tidb-tools v2.1.3-0.20190116051332-34c808eef588+incompatible h1:e9Gi/LP9181HT3gBfSOeSBA+5JfemuE4aEAhqNgoE4k=

infoschema/builder.go

@@ -16,6 +16,7 @@ package infoschema
 import (
 	"fmt"
 	"sort"
+	"strings"
 
 	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/charset"
@@ -173,6 +174,7 @@ func (b *Builder) applyCreateTable(m *meta.Meta, dbInfo *model.DBInfo, tableID i
 			fmt.Sprintf("(Table ID %d)", tableID),
 		)
 	}
+	ConvertCharsetCollateToLowerCaseIfNeed(tblInfo)
 	ConvertOldVersionUTF8ToUTF8MB4IfNeed(tblInfo)
 
 	if alloc == nil {
@@ -198,6 +200,20 @@ func (b *Builder) applyCreateTable(m *meta.Meta, dbInfo *model.DBInfo, tableID i
 	return nil
 }
 
+// ConvertCharsetCollateToLowerCaseIfNeed convert the charset / collation of table and its columns to lower case,
+// if the table's version is prior to TableInfoVersion3.
+func ConvertCharsetCollateToLowerCaseIfNeed(tbInfo *model.TableInfo) {
+	if tbInfo.Version >= model.TableInfoVersion3 {
+		return
+	}
+	tbInfo.Charset = strings.ToLower(tbInfo.Charset)
+	tbInfo.Collate = strings.ToLower(tbInfo.Collate)
+	for _, col := range tbInfo.Columns {
+		col.Charset = strings.ToLower(col.Charset)
+		col.Collate = strings.ToLower(col.Collate)
+	}
+}
+
 // ConvertOldVersionUTF8ToUTF8MB4IfNeed convert old version UTF8 to UTF8MB4 if config.TreatOldVersionUTF8AsUTF8MB4 is enable.
 func ConvertOldVersionUTF8ToUTF8MB4IfNeed(tbInfo *model.TableInfo) {
 	if !config.GetGlobalConfig().TreatOldVersionUTF8AsUTF8MB4 || tbInfo.Version >= model.TableInfoVersion2 {