|
1
|
|
|
package sqlite |
|
2
|
|
|
|
|
3
|
|
|
import ( |
|
4
|
|
|
"adrianolaselva.github.io/csvql/pkg/storage" |
|
5
|
|
|
"database/sql" |
|
6
|
|
|
"fmt" |
|
7
|
|
|
_ "github.com/mattn/go-sqlite3" |
|
8
|
|
|
"strings" |
|
9
|
|
|
) |
|
10
|
|
|
|
|
11
|
|
|
const ( |
|
12
|
|
|
sqlCreateTableTemplate = "CREATE TABLE IF NOT EXISTS %s (%s\n);" |
|
13
|
|
|
sqlInsertTemplate = "INSERT INTO %s (%s) VALUES (%s);" |
|
14
|
|
|
sqlInsertDefaultTableTemplate = "INSERT INTO `schemas` (`id`, `name`, `columns`, `total_columns`) VALUES ((select count(1)+1 FROM `schemas`),?,?,?);" |
|
15
|
|
|
sqlShowTablesTemplate = "select * from `schemas`;" |
|
16
|
|
|
sqlDefaultTableTemplate = "CREATE TABLE IF NOT EXISTS `schemas` (`id` INTEGER, `name` text, `columns` text, `total_columns` INTEGER);" |
|
17
|
|
|
dataSourceNameDefault = ":memory:" |
|
18
|
|
|
) |
|
19
|
|
|
|
|
20
|
|
|
type sqLiteStorage struct { |
|
21
|
|
|
db *sql.DB |
|
22
|
|
|
} |
|
23
|
|
|
|
|
24
|
|
|
func NewSqLiteStorage(datasource string) (storage.Storage, error) { |
|
25
|
|
|
if datasource == "" { |
|
26
|
|
|
datasource = dataSourceNameDefault |
|
27
|
|
|
} |
|
28
|
|
|
|
|
29
|
|
|
db, err := sql.Open("sqlite3", datasource) |
|
30
|
|
|
if err != nil { |
|
31
|
|
|
return nil, fmt.Errorf("failed to open connection with sqlite3: %w", err) |
|
32
|
|
|
} |
|
33
|
|
|
|
|
34
|
|
|
return &sqLiteStorage{db: db}, nil |
|
35
|
|
|
} |
|
36
|
|
|
|
|
37
|
|
|
// BuildStructure build table creation statement |
|
38
|
|
|
func (s *sqLiteStorage) BuildStructure(tableName string, columns []string) error { |
|
39
|
|
|
var tableAttrsRaw strings.Builder |
|
40
|
|
|
|
|
41
|
|
|
for i, v := range columns { |
|
42
|
|
|
columns[i] = fmt.Sprintf("`%v`", v) |
|
43
|
|
|
} |
|
44
|
|
|
|
|
45
|
|
|
for i, v := range columns { |
|
46
|
|
|
tableAttrsRaw.WriteString(fmt.Sprintf("\n\t%s text", v)) |
|
47
|
|
|
if len(columns)-1 > i { |
|
48
|
|
|
tableAttrsRaw.WriteString(",") |
|
49
|
|
|
} |
|
50
|
|
|
} |
|
51
|
|
|
|
|
52
|
|
|
query := fmt.Sprintf(sqlCreateTableTemplate, tableName, tableAttrsRaw.String()) |
|
53
|
|
|
if _, err := s.db.Exec(query); err != nil { |
|
54
|
|
|
return fmt.Errorf("failed to create structure: %w (sql: %s)", err, query) |
|
55
|
|
|
} |
|
56
|
|
|
|
|
57
|
|
|
if _, err := s.db.Exec(sqlDefaultTableTemplate); err != nil { |
|
58
|
|
|
return fmt.Errorf("failed to create tables schemas structure: %w", err) |
|
59
|
|
|
} |
|
60
|
|
|
|
|
61
|
|
|
columnsRaw := fmt.Sprintf("[%v]", strings.Join(columns, ",")) |
|
62
|
|
|
if _, err := s.db.Exec(sqlInsertDefaultTableTemplate, []any{tableName, columnsRaw, len(columns)}...); err != nil { |
|
63
|
|
|
return fmt.Errorf("failed to execute insert: %w", err) |
|
64
|
|
|
} |
|
65
|
|
|
|
|
66
|
|
|
return nil |
|
67
|
|
|
} |
|
68
|
|
|
|
|
69
|
|
|
// InsertRow build insert create statement |
|
70
|
|
|
func (s *sqLiteStorage) InsertRow(tableName string, columns []string, values []any) error { |
|
71
|
|
|
columnsRaw := strings.Join(columns, ", ") |
|
72
|
|
|
paramsRaw := strings.Repeat("?, ", len(columns)) |
|
73
|
|
|
query := fmt.Sprintf(sqlInsertTemplate, tableName, columnsRaw, paramsRaw[:len(paramsRaw)-2]) |
|
74
|
|
|
|
|
75
|
|
|
if _, err := s.db.Exec(query, values...); err != nil { |
|
76
|
|
|
return fmt.Errorf("failed to execute insert: %w (sql: %s)", err, query) |
|
77
|
|
|
} |
|
78
|
|
|
|
|
79
|
|
|
return nil |
|
80
|
|
|
} |
|
81
|
|
|
|
|
82
|
|
|
// Query execute statements |
|
83
|
|
|
func (s *sqLiteStorage) Query(cmd string) (*sql.Rows, error) { |
|
84
|
|
|
rows, err := s.db.Query(cmd) |
|
85
|
|
|
if err != nil { |
|
86
|
|
|
return nil, fmt.Errorf("failed to execute query: %w", err) |
|
87
|
|
|
} |
|
88
|
|
|
|
|
89
|
|
|
return rows, nil |
|
90
|
|
|
} |
|
91
|
|
|
|
|
92
|
|
|
func (s *sqLiteStorage) ShowTables() (*sql.Rows, error) { |
|
93
|
|
|
rows, err := s.db.Query(sqlShowTablesTemplate) |
|
94
|
|
|
if err != nil { |
|
95
|
|
|
return nil, fmt.Errorf("failed to execute query: %w", err) |
|
96
|
|
|
} |
|
97
|
|
|
|
|
98
|
|
|
return rows, nil |
|
99
|
|
|
} |
|
100
|
|
|
|
|
101
|
|
|
// Close execute in defer |
|
102
|
|
|
func (s *sqLiteStorage) Close() error { |
|
103
|
|
|
err := s.db.Close() |
|
104
|
|
|
if err != nil { |
|
105
|
|
|
return fmt.Errorf("failed to close sqlite3 connection: %w", err) |
|
106
|
|
|
} |
|
107
|
|
|
|
|
108
|
|
|
return nil |
|
109
|
|
|
} |
|
110
|
|
|
|
adrianolaselva /
csvql
