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parser.y
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%{
// Copyright 2013 The ql Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSES/QL-LICENSE file.
// Copyright 2015 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
// Inital yacc source generated by ebnf2y[1]
// at 2013-10-04 23:10:47.861401015 +0200 CEST
//
// $ ebnf2y -o ql.y -oe ql.ebnf -start StatementList -pkg ql -p _
//
// [1]: http://github.com/cznic/ebnf2y
package parser
import (
"strings"
"github.com/pingcap/tidb/mysql"
"github.com/pingcap/tidb/ast"
"github.com/pingcap/tidb/field"
"github.com/pingcap/tidb/model"
"github.com/pingcap/tidb/parser/opcode"
"github.com/pingcap/tidb/util/charset"
"github.com/pingcap/tidb/util/types"
)
%}
%union {
offset int // offset
line int
col int
item interface{}
list []interface{}
}
%token <item>
/*yy:token "1.%d" */ floatLit "floating-point literal"
/*yy:token "%c" */ identifier "identifier"
/*yy:token "%d" */ intLit "integer literal"
/*yy:token "\"%c\"" */ stringLit "string literal"
/*yy:token "%x" */ hexLit "hexadecimal literal"
/*yy:token "%b" */ bitLit "bit literal"
abs "ABS"
add "ADD"
after "AFTER"
all "ALL"
alter "ALTER"
and "AND"
andand "&&"
andnot "&^"
any "ANY"
as "AS"
asc "ASC"
at "AT"
autoIncrement "AUTO_INCREMENT"
avg "AVG"
avgRowLength "AVG_ROW_LENGTH"
begin "BEGIN"
between "BETWEEN"
both "BOTH"
by "BY"
byteType "BYTE"
caseKwd "CASE"
cast "CAST"
character "CHARACTER"
charsetKwd "CHARSET"
check "CHECK"
checksum "CHECKSUM"
coalesce "COALESCE"
collate "COLLATE"
collation "COLLATION"
column "COLUMN"
columns "COLUMNS"
comment "COMMENT"
commit "COMMIT"
compression "COMPRESSION"
concat "CONCAT"
concatWs "CONCAT_WS"
connection "CONNECTION"
constraint "CONSTRAINT"
convert "CONVERT"
count "COUNT"
create "CREATE"
cross "CROSS"
curDate "CURDATE"
currentDate "CURRENT_DATE"
currentUser "CURRENT_USER"
database "DATABASE"
databases "DATABASES"
dateAdd "DATE_ADD"
dateSub "DATE_SUB"
day "DAY"
dayofmonth "DAYOFMONTH"
dayofweek "DAYOFWEEK"
dayofyear "DAYOFYEAR"
deallocate "DEALLOCATE"
defaultKwd "DEFAULT"
delayed "DELAYED"
deleteKwd "DELETE"
desc "DESC"
describe "DESCRIBE"
distinct "DISTINCT"
div "DIV"
do "DO"
drop "DROP"
dual "DUAL"
duplicate "DUPLICATE"
elseKwd "ELSE"
end "END"
engine "ENGINE"
engines "ENGINES"
enum "ENUM"
eq "="
escape "ESCAPE"
execute "EXECUTE"
exists "EXISTS"
explain "EXPLAIN"
extract "EXTRACT"
falseKwd "false"
first "FIRST"
foreign "FOREIGN"
forKwd "FOR"
foundRows "FOUND_ROWS"
from "FROM"
full "FULL"
fulltext "FULLTEXT"
ge ">="
global "GLOBAL"
grant "GRANT"
grants "GRANTS"
group "GROUP"
groupConcat "GROUP_CONCAT"
having "HAVING"
highPriority "HIGH_PRIORITY"
hour "HOUR"
identified "IDENTIFIED"
ignore "IGNORE"
ifKwd "IF"
ifNull "IFNULL"
in "IN"
index "INDEX"
inner "INNER"
insert "INSERT"
interval "INTERVAL"
into "INTO"
is "IS"
join "JOIN"
key "KEY"
keyBlockSize "KEY_BLOCK_SIZE"
le "<="
leading "LEADING"
left "LEFT"
length "LENGTH"
like "LIKE"
limit "LIMIT"
local "LOCAL"
locate "LOCATE"
lock "LOCK"
lower "LOWER"
lowPriority "LOW_PRIORITY"
lsh "<<"
max "MAX"
maxRows "MAX_ROWS"
microsecond "MICROSECOND"
min "MIN"
minute "MINUTE"
minRows "MIN_ROWS"
mod "MOD"
mode "MODE"
month "MONTH"
names "NAMES"
national "NATIONAL"
neq "!="
neqSynonym "<>"
not "NOT"
null "NULL"
nulleq "<=>"
nullIf "NULLIF"
offset "OFFSET"
on "ON"
option "OPTION"
or "OR"
order "ORDER"
oror "||"
outer "OUTER"
password "PASSWORD"
placeholder "PLACEHOLDER"
prepare "PREPARE"
primary "PRIMARY"
quarter "QUARTER"
quick "QUICK"
rand "RAND"
references "REFERENCES"
regexp "REGEXP"
repeat "REPEAT"
replace "REPLACE"
right "RIGHT"
rlike "RLIKE"
rollback "ROLLBACK"
row "ROW"
rsh ">>"
schema "SCHEMA"
schemas "SCHEMAS"
second "SECOND"
selectKwd "SELECT"
session "SESSION"
set "SET"
share "SHARE"
show "SHOW"
signed "SIGNED"
some "SOME"
start "START"
stringType "string"
substring "SUBSTRING"
substringIndex "SUBSTRING_INDEX"
sum "SUM"
sysVar "SYS_VAR"
sysDate "SYSDATE"
tableKwd "TABLE"
tables "TABLES"
then "THEN"
to "TO"
trailing "TRAILING"
transaction "TRANSACTION"
trim "TRIM"
trueKwd "true"
truncate "TRUNCATE"
underscoreCS "UNDERSCORE_CHARSET"
unknown "UNKNOWN"
union "UNION"
unique "UNIQUE"
unsigned "UNSIGNED"
update "UPDATE"
upper "UPPER"
use "USE"
user "USER"
using "USING"
userVar "USER_VAR"
value "VALUE"
values "VALUES"
variables "VARIABLES"
warnings "WARNINGS"
week "WEEK"
weekday "WEEKDAY"
weekofyear "WEEKOFYEAR"
when "WHEN"
where "WHERE"
xor "XOR"
yearweek "YEARWEEK"
zerofill "ZEROFILL"
calcFoundRows "SQL_CALC_FOUND_ROWS"
currentTs "CURRENT_TIMESTAMP"
localTime "LOCALTIME"
localTs "LOCALTIMESTAMP"
now "NOW"
tinyIntType "TINYINT"
smallIntType "SMALLINT"
mediumIntType "MEDIUMINT"
intType "INT"
integerType "INTEGER"
bigIntType "BIGINT"
bitType "BIT"
decimalType "DECIMAL"
numericType "NUMERIC"
floatType "float"
doubleType "DOUBLE"
precisionType "PRECISION"
realType "REAL"
dateType "DATE"
timeType "TIME"
datetimeType "DATETIME"
timestampType "TIMESTAMP"
yearType "YEAR"
charType "CHAR"
varcharType "VARCHAR"
binaryType "BINARY"
varbinaryType "VARBINARY"
tinyblobType "TINYBLOB"
blobType "BLOB"
mediumblobType "MEDIUMBLOB"
longblobType "LONGBLOB"
tinytextType "TINYTEXT"
textType "TEXT"
mediumtextType "MEDIUMTEXT"
longtextType "LONGTEXT"
int16Type "int16"
int24Type "int24"
int32Type "int32"
int64Type "int64"
int8Type "int8"
uintType "uint"
uint16Type "uint16"
uint32Type "uint32"
uint64Type "uint64"
uint8Type "uint8",
float32Type "float32"
float64Type "float64"
boolType "BOOL"
booleanType "BOOLEAN"
parseExpression "parse expression prefix"
secondMicrosecond "SECOND_MICROSECOND"
minuteMicrosecond "MINUTE_MICROSECOND"
minuteSecond "MINUTE_SECOND"
hourMicrosecond "HOUR_MICROSECOND"
hourSecond "HOUR_SECOND"
hourMinute "HOUR_MINUTE"
dayMicrosecond "DAY_MICROSECOND"
daySecond "DAY_SECOND"
dayMinute "DAY_MINUTE"
dayHour "DAY_HOUR"
yearMonth "YEAR_MONTH"
%type <item>
AlterTableStmt "Alter table statement"
AlterTableSpec "Alter table specification"
AlterTableSpecList "Alter table specification list"
AnyOrAll "Any or All for subquery"
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"
ColumnDef "table column definition"
ColumnName "column name"
ColumnNameList "column name list"
ColumnNameListOpt "column name list opt"
ColumnKeywordOpt "Column keyword or empty"
ColumnSetValue "insert statement set value by column name"
ColumnSetValueList "insert statement set value by column name list"
CommaOpt "optional comma"
CommitStmt "COMMIT statement"
CompareOp "Compare opcode"
ColumnOption "column definition option"
ColumnOptionList "column definition option list"
ColumnOptionListOpt "optional column definition option list"
Constraint "table constraint"
ConstraintElem "table constraint element"
ConstraintKeywordOpt "Constraint Keyword or empty"
CreateDatabaseStmt "Create Database Statement"
CreateIndexStmt "CREATE INDEX statement"
CreateIndexStmtUnique "CREATE INDEX optional UNIQUE clause"
DatabaseOption "CREATE Database specification"
DatabaseOptionList "CREATE Database specification list"
DatabaseOptionListOpt "CREATE Database specification list opt"
CreateTableStmt "CREATE TABLE statement"
CreateUserStmt "CREATE User statement"
CrossOpt "Cross join option"
DatabaseSym "DATABASE or SCHEMA"
DBName "Database Name"
DeallocateSym "Deallocate or drop"
DeallocateStmt "Deallocate prepared statement"
Default "DEFAULT clause"
DefaultOpt "optional DEFAULT clause"
DefaultKwdOpt "optional DEFAULT keyword"
DefaultValueExpr "DefaultValueExpr(Now or Signed Literal)"
DeleteFromStmt "DELETE FROM statement"
DistinctOpt "Distinct option"
DoStmt "Do statement"
DropDatabaseStmt "DROP DATABASE statement"
DropIndexStmt "DROP INDEX statement"
DropTableStmt "DROP TABLE statement"
EmptyStmt "empty statement"
EqOpt "= or empty"
EscapedTableRef "escaped table reference"
ExecuteStmt "Execute statement"
ExplainSym "EXPLAIN or DESCRIBE or DESC"
ExplainStmt "EXPLAIN statement"
Expression "expression"
ExpressionList "expression list"
ExpressionListOpt "expression list opt"
ExpressionListList "expression list list"
Factor "expression factor"
PredicateExpr "Predicate expression factor"
Field "field expression"
FieldAsName "Field alias name"
FieldAsNameOpt "Field alias name opt"
FieldList "field expression list"
TableRefsClause "Table references clause"
Function "function expr"
FunctionCallAgg "Function call on aggregate data"
FunctionCallConflict "Function call with reserved keyword as function name"
FunctionCallKeyword "Function call with keyword as function name"
FunctionCallNonKeyword "Function call with nonkeyword as function name"
FunctionNameConflict "Built-in function call names which are conflict with keywords"
FuncDatetimePrec "Function datetime precision"
GlobalScope "The scope of variable"
GrantStmt "Grant statement"
GroupByClause "GROUP BY clause"
HashString "Hashed string"
HavingClause "HAVING clause"
IfExists "If Exists"
IfNotExists "If Not Exists"
IgnoreOptional "IGNORE or empty"
IndexColName "Index column name"
IndexColNameList "List of index column name"
IndexName "index name"
IndexType "index type"
InsertIntoStmt "INSERT INTO statement"
InsertValues "Rest part of INSERT/REPLACE INTO statement"
IntoOpt "INTO or EmptyString"
JoinTable "join table"
JoinType "join type"
KeyOrIndex "{KEY|INDEX}"
LikeEscapeOpt "like escape option"
LimitClause "LIMIT clause"
Literal "literal value"
logAnd "logical and operator"
logOr "logical or operator"
LowPriorityOptional "LOW_PRIORITY or empty"
name "name"
NationalOpt "National option"
NotOpt "optional NOT"
NowSym "CURRENT_TIMESTAMP/LOCALTIME/LOCALTIMESTAMP/NOW"
NumLiteral "Num/Int/Float/Decimal Literal"
ObjectType "Grant statement object type"
OnDuplicateKeyUpdate "ON DUPLICATE KEY UPDATE value list"
Operand "operand"
OptFull "Full or empty"
OptInteger "Optional Integer keyword"
Order "ORDER BY clause optional collation specification"
OrderBy "ORDER BY clause"
ByItem "BY item"
OrderByOptional "Optional ORDER BY clause optional"
ByList "BY list"
OuterOpt "optional OUTER clause"
QuickOptional "QUICK or empty"
PasswordOpt "Password option"
ColumnPosition "Column position [First|After ColumnName]"
PreparedStmt "PreparedStmt"
PrepareSQL "Prepare statement sql string"
PrimaryExpression "primary expression"
PrimaryFactor "primary expression factor"
Priority "insert statement priority"
PrivElem "Privilege element"
PrivElemList "Privilege element list"
PrivLevel "Privilege scope"
PrivType "Privilege type"
ReferDef "Reference definition"
RegexpSym "REGEXP or RLIKE"
ReplaceIntoStmt "REPLACE INTO statement"
ReplacePriority "replace statement priority"
RollbackStmt "ROLLBACK statement"
SelectLockOpt "FOR UPDATE or LOCK IN SHARE MODE,"
SelectStmt "SELECT statement"
SelectStmtCalcFoundRows "SELECT statement optional SQL_CALC_FOUND_ROWS"
SelectStmtDistinct "SELECT statement optional DISTINCT clause"
SelectStmtFieldList "SELECT statement field list"
SelectStmtLimit "SELECT statement optional LIMIT clause"
SelectStmtOpts "Select statement options"
SelectStmtGroup "SELECT statement optional GROUP BY clause"
SetStmt "Set variable statement"
ShowStmt "Show engines/databases/tables/columns/warnings statement"
ShowDatabaseNameOpt "Show tables/columns statement database name option"
ShowTableAliasOpt "Show table alias option"
ShowLikeOrWhereOpt "Show like or where condition option"
SignedLiteral "Literal or NumLiteral with sign"
Statement "statement"
StatementList "statement list"
StringName "string literal or identifier"
StringList "string list"
ExplainableStmt "explainable statement"
SubSelect "Sub Select"
Symbol "Constraint Symbol"
SystemVariable "System defined variable name"
TableAsName "table alias name"
TableAsNameOpt "table alias name optional"
TableElement "table definition element"
TableElementList "table definition element list"
TableFactor "table factor"
TableName "Table name"
TableNameList "Table name list"
TableOption "create table option"
TableOptionList "create table option list"
TableOptionListOpt "create table option list opt"
TableRef "table reference"
TableRefs "table references"
TimeUnit "Time unit"
TrimDirection "Trim string direction"
TruncateTableStmt "TRANSACTION TABLE statement"
UnionOpt "Union Option(empty/ALL/DISTINCT)"
UnionStmt "Union select state ment"
UnionClauseList "Union select clause list"
UnionSelect "Union (select) item"
UpdateStmt "UPDATE statement"
Username "Username"
UserSpec "Username and auth option"
UserSpecList "Username and auth option list"
UserVariable "User defined variable name"
UserVariableList "User defined variable name list"
UseStmt "USE statement"
ValueSym "Value or Values"
VariableAssignment "set variable value"
VariableAssignmentList "set variable value list"
Variable "User or system variable"
WhereClause "WHERE clause"
WhereClauseOptional "Optinal WHERE clause"
Identifier "identifier or unreserved keyword"
UnReservedKeyword "MySQL unreserved keywords"
NotKeywordToken "Tokens not mysql keyword but treated specially"
WhenClause "When clause"
WhenClauseList "When clause list"
ElseOpt "Optional else clause"
ExpressionOpt "Optional expression"
Type "Types"
NumericType "Numeric types"
IntegerType "Integer Types types"
FixedPointType "Exact value types"
FloatingPointType "Approximate value types"
BitValueType "bit value types"
StringType "String types"
BlobType "Blob types"
TextType "Text types"
DateAndTimeType "Date and Time types"
OptFieldLen "Field length or empty"
FieldLen "Field length"
FieldOpts "Field type definition option list"
FieldOpt "Field type definition option"
FloatOpt "Floating-point type option"
Precision "Floating-point precision option"
OptBinary "Optional BINARY"
CharsetKw "charset or charater set"
OptCharset "Optional Character setting"
OptCollate "Optional Collate setting"
NUM "numbers"
LengthNum "Field length num(uint64)"
%token tableRefPriority
%precedence lowerThanCalcFoundRows
%precedence calcFoundRows
%precedence lowerThanSetKeyword
%precedence set
%precedence lowerThanInsertValues
%precedence insertValues
%left join inner cross left right full
/* A dummy token to force the priority of TableRef production in a join. */
%left tableRefPriority
%precedence on
%left oror or
%left xor
%left andand and
%left between
%precedence lowerThanEq
%left eq ge le neq neqSynonym '>' '<' is like in
%left '|'
%left '&'
%left rsh lsh
%left '-' '+'
%left '*' '/' '%' div mod
%left '^'
%left '~' neg
%right not
%right collate
%precedence lowerThanLeftParen
%precedence '('
%precedence lowerThanQuick
%precedence quick
%precedence lowerThanEscape
%precedence escape
%precedence lowerThanComma
%precedence ','
%start Start
%%
Start:
StatementList
| parseExpression Expression
{
yylex.(*lexer).expr = $2.(ast.ExprNode)
}
/**************************************AlterTableStmt***************************************
* See: https://dev.mysql.com/doc/refman/5.7/en/alter-table.html
*******************************************************************************************/
AlterTableStmt:
"ALTER" IgnoreOptional "TABLE" TableName AlterTableSpecList
{
$$ = &ast.AlterTableStmt{
Table: $4.(*ast.TableName),
Specs: $5.([]*ast.AlterTableSpec),
}
}
AlterTableSpec:
TableOptionListOpt
{
$$ = &ast.AlterTableSpec{
Tp: ast.AlterTableOption,
Options:$1.([]*ast.TableOption),
}
}
| "ADD" ColumnKeywordOpt ColumnDef ColumnPosition
{
$$ = &ast.AlterTableSpec{
Tp: ast.AlterTableAddColumn,
Column: $3.(*ast.ColumnDef),
Position: $4.(*ast.ColumnPosition),
}
}
| "ADD" Constraint
{
constraint := $2.(*ast.Constraint)
$$ = &ast.AlterTableSpec{
Tp: ast.AlterTableAddConstraint,
Constraint: constraint,
}
}
| "DROP" ColumnKeywordOpt ColumnName
{
$$ = &ast.AlterTableSpec{
Tp: ast.AlterTableDropColumn,
DropColumn: $3.(*ast.ColumnName),
}
}
| "DROP" "PRIMARY" "KEY"
{
$$ = &ast.AlterTableSpec{Tp: ast.AlterTableDropPrimaryKey}
}
| "DROP" KeyOrIndex IndexName
{
$$ = &ast.AlterTableSpec{
Tp: ast.AlterTableDropIndex,
Name: $3.(string),
}
}
| "DROP" "FOREIGN" "KEY" Symbol
{
$$ = &ast.AlterTableSpec{
Tp: ast.AlterTableDropForeignKey,
Name: $4.(string),
}
}
KeyOrIndex:
"KEY"|"INDEX"
ColumnKeywordOpt:
{}
| "COLUMN"
ColumnPosition:
{
$$ = &ast.ColumnPosition{Tp: ast.ColumnPositionNone}
}
| "FIRST"
{
$$ = &ast.ColumnPosition{Tp: ast.ColumnPositionFirst}
}
| "AFTER" ColumnName
{
$$ = &ast.ColumnPosition{
Tp: ast.ColumnPositionAfter,
RelativeColumn: $2.(*ast.ColumnName),
}
}
AlterTableSpecList:
AlterTableSpec
{
$$ = []*ast.AlterTableSpec{$1.(*ast.AlterTableSpec)}
}
| AlterTableSpecList ',' AlterTableSpec
{
$$ = append($1.([]*ast.AlterTableSpec), $3.(*ast.AlterTableSpec))
}
ConstraintKeywordOpt:
{
$$ = nil
}
| "CONSTRAINT"
{
$$ = nil
}
| "CONSTRAINT" Symbol
{
$$ = $2.(string)
}
Symbol:
Identifier
/*******************************************************************************************/
Assignment:
ColumnName eq Expression
{
$$ = &ast.Assignment{Column: $1.(*ast.ColumnName), Expr:$3.(ast.ExprNode)}
}
AssignmentList:
Assignment
{
$$ = []*ast.Assignment{$1.(*ast.Assignment)}
}
| AssignmentList ',' Assignment
{
$$ = append($1.([]*ast.Assignment), $3.(*ast.Assignment))
}
AssignmentListOpt:
/* EMPTY */
{
$$ = []*ast.Assignment{}
}
| AssignmentList
BeginTransactionStmt:
"BEGIN"
{
$$ = &ast.BeginStmt{}
}
| "START" "TRANSACTION"
{
$$ = &ast.BeginStmt{}
}
ColumnDef:
ColumnName Type ColumnOptionListOpt
{
$$ = &ast.ColumnDef{Name: $1.(*ast.ColumnName), Tp: $2.(*types.FieldType), Options: $3.([]*ast.ColumnOption)}
}
ColumnName:
Identifier
{
$$ = &ast.ColumnName{Name: model.NewCIStr($1.(string))}
}
| Identifier '.' Identifier
{
$$ = &ast.ColumnName{Table: model.NewCIStr($1.(string)), Name: model.NewCIStr($3.(string))}
}
| Identifier '.' Identifier '.' Identifier
{
$$ = &ast.ColumnName{Schema: model.NewCIStr($1.(string)), Table: model.NewCIStr($3.(string)), Name: model.NewCIStr($5.(string))}
}
ColumnNameList:
ColumnName
{
$$ = []*ast.ColumnName{$1.(*ast.ColumnName)}
}
| ColumnNameList ',' ColumnName
{
$$ = append($1.([]*ast.ColumnName), $3.(*ast.ColumnName))
}
ColumnNameListOpt:
/* EMPTY */
{
$$ = []*ast.ColumnName{}
}
| ColumnNameList
{
$$ = $1.([]*ast.ColumnName)
}
CommitStmt:
"COMMIT"
{
$$ = &ast.CommitStmt{}
}
ColumnOption:
"NOT" "NULL"
{
$$ = &ast.ColumnOption{Tp: ast.ColumnOptionNotNull}
}
| "NULL"
{
$$ = &ast.ColumnOption{Tp: ast.ColumnOptionNull}
}
| "AUTO_INCREMENT"
{
$$ = &ast.ColumnOption{Tp: ast.ColumnOptionAutoIncrement}
}
| "PRIMARY" "KEY"
{
$$ = &ast.ColumnOption{Tp: ast.ColumnOptionPrimaryKey}
}
| "UNIQUE"
{
$$ = &ast.ColumnOption{Tp: ast.ColumnOptionUniq}
}
| "UNIQUE" "KEY"
{
$$ = &ast.ColumnOption{Tp: ast.ColumnOptionUniqKey}
}
| "DEFAULT" DefaultValueExpr
{
$$ = &ast.ColumnOption{Tp: ast.ColumnOptionDefaultValue, Expr: $2.(ast.ExprNode)}
}
| "ON" "UPDATE" NowSym
{
$$ = &ast.ColumnOption{Tp: ast.ColumnOptionOnUpdate, Expr: $3.(ast.ExprNode)}
}
| "COMMENT" stringLit
{
$$ = &ast.ColumnOption{Tp: ast.ColumnOptionComment}
}
| "CHECK" '(' Expression ')'
{
// See: https://dev.mysql.com/doc/refman/5.7/en/create-table.html
// The CHECK clause is parsed but ignored by all storage engines.
$$ = &ast.ColumnOption{}
}
ColumnOptionList:
ColumnOption
{
$$ = []*ast.ColumnOption{$1.(*ast.ColumnOption)}
}
| ColumnOptionList ColumnOption
{
$$ = append($1.([]*ast.ColumnOption), $2.(*ast.ColumnOption))
}
ColumnOptionListOpt:
{
$$ = []*ast.ColumnOption{}
}
| ColumnOptionList
{
$$ = $1.([]*ast.ColumnOption)
}
ConstraintElem:
"PRIMARY" "KEY" '(' IndexColNameList ')'
{
$$ = &ast.Constraint{Tp: ast.ConstraintPrimaryKey, Keys: $4.([]*ast.IndexColName)}
}
| "FULLTEXT" "KEY" IndexName '(' IndexColNameList ')'
{
$$ = &ast.Constraint{
Tp: ast.ConstraintFulltext,
Keys: $5.([]*ast.IndexColName),
Name: $3.(string),
}
}
| "INDEX" IndexName '(' IndexColNameList ')'
{
$$ = &ast.Constraint{
Tp: ast.ConstraintIndex,
Keys: $4.([]*ast.IndexColName),
Name: $2.(string),
}
}
| "KEY" IndexName '(' IndexColNameList ')'
{
$$ = &ast.Constraint{
Tp: ast.ConstraintKey,
Keys: $4.([]*ast.IndexColName),
Name: $2.(string)}
}
| "UNIQUE" IndexName '(' IndexColNameList ')'
{
$$ = &ast.Constraint{
Tp: ast.ConstraintUniq,
Keys: $4.([]*ast.IndexColName),
Name: $2.(string)}
}
| "UNIQUE" "INDEX" IndexName '(' IndexColNameList ')'
{
$$ = &ast.Constraint{
Tp: ast.ConstraintUniqIndex,
Keys: $5.([]*ast.IndexColName),
Name: $3.(string)}
}
| "UNIQUE" "KEY" IndexName '(' IndexColNameList ')'
{
$$ = &ast.Constraint{
Tp: ast.ConstraintUniqKey,
Keys: $5.([]*ast.IndexColName),
Name: $3.(string)}
}
| "FOREIGN" "KEY" IndexName '(' IndexColNameList ')' ReferDef
{
$$ = &ast.Constraint{
Tp: ast.ConstraintForeignKey,
Keys: $5.([]*ast.IndexColName),
Name: $3.(string),
Refer: $7.(*ast.ReferenceDef),
}
}
ReferDef:
"REFERENCES" TableName '(' IndexColNameList ')'
{
$$ = &ast.ReferenceDef{Table: $2.(*ast.TableName), IndexColNames: $4.([]*ast.IndexColName)}
}
/*
* The DEFAULT clause specifies a default value for a column.
* With one exception, the default value must be a constant;
* it cannot be a function or an expression. This means, for example,
* that you cannot set the default for a date column to be the value of
* a function such as NOW() or CURRENT_DATE. The exception is that you
* can specify CURRENT_TIMESTAMP as the default for a TIMESTAMP or DATETIME column.
*
* See: http://dev.mysql.com/doc/refman/5.7/en/create-table.html
* https://github.com/mysql/mysql-server/blob/5.7/sql/sql_yacc.yy#L6832
*/
DefaultValueExpr:
NowSym
| SignedLiteral
// TODO: Process other three keywords
NowSym:
"CURRENT_TIMESTAMP"
{
$$ = &ast.IdentifierExpr{Name: model.NewCIStr("CURRENT_TIMESTAMP")}
}
| "LOCALTIME"
| "LOCALTIMESTAMP"
| "NOW"
SignedLiteral:
Literal
{
$$ = ast.NewValueExpr($1)
}
| '+' NumLiteral
{
$$ = &ast.UnaryOperationExpr{Op: opcode.Plus, V: ast.NewValueExpr($2)}
}
| '-' NumLiteral
{
$$ = &ast.UnaryOperationExpr{Op: opcode.Minus, V: ast.NewValueExpr($2)}
}
// TODO: support decimal literal
NumLiteral:
intLit
| floatLit
CreateIndexStmt:
"CREATE" CreateIndexStmtUnique "INDEX" Identifier "ON" TableName '(' IndexColNameList ')'
{
$$ = &ast.CreateIndexStmt{
Unique: $2.(bool),
IndexName: $4.(string),
Table: $6.(*ast.TableName),
IndexColNames: $8.([]*ast.IndexColName),
}
if yylex.(*lexer).root {
break
}
}
CreateIndexStmtUnique:
{
$$ = false
}
| "UNIQUE"
{
$$ = true
}
IndexColName: