parser: Support CreateUser syntax

parser/coldef/opt.go

@@ -221,3 +221,14 @@ func (tc *TableConstraint) String() string {
 	}
 	return strings.Join(tokens, " ")
 }
+
+type AuthOption struct {
+	AuthString string
+	HashString string
+	// TODO: support auth_plugin
+}
+
+type UserSpecification struct {
+	User    string
+	AuthOpt *AuthOption
+}

parser/parser.y

@@ -137,6 +137,7 @@ import (
 	having		"HAVING"
 	highPriority	"HIGH_PRIORITY"
 	hour		"HOUR"
+	identified	"IDENTIFIED"
 	ignore		"IGNORE"
 	ifKwd		"IF"
 	ifNull		"IFNULL"
@@ -217,6 +218,7 @@ import (
 	unsigned	"UNSIGNED"
 	update		"UPDATE"
 	use		"USE"
+	user		"USER"
 	using		"USING"
 	userVar		"USER_VAR"
 	value		"VALUE"
@@ -299,6 +301,7 @@ import (
 	Assignment		"assignment"
 	AssignmentList		"assignment list"
 	AssignmentListOpt	"assignment list opt"
+	AuthOption		"User auth option"
 	AuthString		"Password string value"
 	BeginTransactionStmt	"BEGIN TRANSACTION statement"
 	CastType		"Cast function target type"
@@ -327,6 +330,7 @@ import (
 	CreateSpecificationList	"CREATE Database specification list"
 	CreateSpecListOpt	"CREATE Database specification list opt"
 	CreateTableStmt		"CREATE TABLE statement"
+	CreateUserStmt		"CREATE User statement"
 	CrossOpt		"Cross join option"
 	DBName			"Database Name"
 	DeallocateSym		"Deallocate or drop"
@@ -451,6 +455,8 @@ import (
 	UnionStmt		"Union statement"
 	UpdateStmt		"UPDATE statement"
 	Username		"Username"
+	UserSpecification	"Username and auth option"
+	UserSpecificationList	"Username and auth option list"
 	UserVariable		"User defined variable name"
 	UserVariableList	"User defined variable name list"
 	UseStmt			"USE statement"
@@ -1593,7 +1599,7 @@ UnReservedKeyword:
 |	"DATE" | "DATETIME" | "DEALLOCATE" | "DO" | "END" | "ENGINE" | "ENGINES" | "EXECUTE" | "FIRST" | "FULL" 
 |	"LOCAL" | "NAMES" | "OFFSET" | "PASSWORD" %prec lowerThanEq | "PREPARE" | "QUICK" | "ROLLBACK" | "SESSION" | "SIGNED" 
 |	"START" | "GLOBAL" | "TABLES"| "TEXT" | "TIME" | "TIMESTAMP" | "TRANSACTION" | "TRUNCATE" | "UNKNOWN" 
-|	"VALUE" | "WARNINGS" | "YEAR" |	"MODE" | "WEEK" | "ANY" | "SOME"
+|	"VALUE" | "WARNINGS" | "YEAR" |	"MODE" | "WEEK" | "ANY" | "SOME" | "USER" | "IDENTIFIED"
 
 NotKeywordToken:
 	"ABS" | "COALESCE" | "CONCAT" | "CONCAT_WS" | "COUNT" | "DAY" | "DAYOFMONTH" | "DAYOFWEEK" | "DAYOFYEAR" | "FOUND_ROWS" | "GROUP_CONCAT" 
@@ -3795,5 +3801,43 @@ CommaOpt:
 	{
 	}
 
+/************************************************************************************
+ *  Account Management Statements
+ *  https://dev.mysql.com/doc/refman/5.7/en/account-management-sql.html
+ ************************************************************************************/
+CreateUserStmt:
+	"CREATE" "USER" IfNotExists UserSpecificationList
+	{
+ 		// See: https://dev.mysql.com/doc/refman/5.7/en/create-user.html
+	
+	} 
+
+UserSpecification:
+	Username AuthOption	
+	{
+		$$ = &coldef.UserSpecification{
+			User: $1.(string),
+			AuthOpt: $2.(*coldef.AuthOption),
+		}
+	}
+
+UserSpecificationList:
+	UserSpecification
+	{
+		$$ = []*coldef.UserSpecification{$1.(*coldef.UserSpecification)}
+	}
+|	UserSpecificationList ',' UserSpecification
+	{
+		$$ = append($1.([]*coldef.UserSpecification), $3.(*coldef.UserSpecification))
+	}
+
+AuthOption:
+	{}
+|	"IDENTIFIED" "BY" AuthString
+	{
+		$$ = &coldef.AuthOption {
+			AuthString: $3.(string),
+		}	
+	}
 %%
 

parser/parser_test.go

@@ -325,6 +325,10 @@ func (s *testParserSuite) TestParser0(c *C) {
 
 		// For comparison
 		{"select 1 <=> 0, 1 <=> null, 1 = null", true},
+
+		// For create user
+		{"CREATE USER 'root'@'localhost' IDENTIFIED BY 'new-password'", true},
+		{"CREATE USER 'root'@'localhost' IDENTIFIED BY 'new-password', 'root'@'127.0.0.1' IDENTIFIED BY 'new-password'", true},
 	}
 
 	for _, t := range table {

parser/scanner.l

@@ -298,6 +298,7 @@ group_concat	{g}{r}{o}{u}{p}_{c}{o}{n}{c}{a}{t}
 having		{h}{a}{v}{i}{n}{g}
 high_priority	{h}{i}{g}{h}_{p}{r}{i}{o}{r}{i}{t}{y}
 hour		{h}{o}{u}{r}
+identified	{i}{d}{e}{n}{t}{i}{f}{i}{e}{d}
 if		{i}{f}
 ifnull		{i}{f}{n}{u}{l}{l}
 ignore		{i}{g}{n}{o}{r}{e}
@@ -431,6 +432,7 @@ duration	{d}{u}{r}{a}{t}{i}{o}{n}
 rune		{r}{u}{n}{e}
 string		{s}{t}{r}{i}{n}{g}
 use		{u}{s}{e}
+user		{u}{s}{e}{r}
 using		{u}{s}{i}{n}{g}
 
 idchar0		[a-zA-Z_]
@@ -588,6 +590,8 @@ sys_var		"@@"(({global}".")|({session}".")|{local}".")?{ident}
 {high_priority}		return highPriority
 {hour}			lval.item = string(l.val)
 			return hour
+{identified}		lval.item = string(l.val)
+			return identified
 {if}			lval.item = string(l.val)
 			return ifKwd
 {ifnull}		lval.item = string(l.val)
@@ -694,6 +698,8 @@ sys_var		"@@"(({global}".")|({session}".")|{local}".")?{ident}
 			return nullIf
 {update}		return update
 {use}			return use
+{user}			lval.item = string(l.val)
+			return user
 {using}			return using
 {value}			lval.item = string(l.val)
 			return value