/
token.go
102 lines (89 loc) · 2.1 KB
/
token.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
package sqlscanner
import "fmt"
// Token represents a SQL token.
type Token int
func (t Token) String() string {
s := tokenStrings[t]
if s == "" {
s = fmt.Sprintf("Token(%d)", t)
}
return s
}
// The list of SQL tokens.
const (
OTHER Token = iota // anything we don't specifically care about
eof
COMMENT
IDENT // includes unhandled keywords
NUMBER // 123, 123.45, 123e+45
STRING // 'foo'
PERIOD // .
COMMA // ,
LPAREN // (
RPAREN // )
AS
CALL
DELETE
FROM
INSERT
INTO
OR
REPLACE
SELECT
SET
TABLE
TRUNCATE // Cassandra/CQL-specific
UPDATE
)
var tokenStrings = [...]string{
OTHER: "OTHER",
eof: "EOF",
COMMENT: "COMMENT",
IDENT: "IDENT",
NUMBER: "NUMBER",
STRING: "STRING",
PERIOD: "PERIOD",
COMMA: "COMMA",
LPAREN: "LPAREN",
RPAREN: "RPAREN",
AS: "AS",
CALL: "CALL",
DELETE: "DELETE",
FROM: "FROM",
INSERT: "INSERT",
INTO: "INTO",
OR: "OR",
REPLACE: "REPLACE",
SELECT: "SELECT",
SET: "SET",
TABLE: "TABLE",
TRUNCATE: "TRUNCATE",
UPDATE: "UPDATE",
}
// keywords contains keyword tokens, indexed
// at the position of keyword length.
var keywords = [...][]Token{
2: []Token{AS, OR},
3: []Token{SET},
4: []Token{CALL, FROM, INTO},
5: []Token{TABLE},
6: []Token{DELETE, INSERT, SELECT, UPDATE},
7: []Token{REPLACE},
8: []Token{TRUNCATE},
}