database.*SQLite.GetColumnsOfTable - Code Metrics - Inspection of "ISSUE-22: Add database type `sqlite3`" - fraenky8/tables-to-go - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — ISSUE-22 ( 117fa4 )

by Frank

created 2019-10-02 13:43 UTC

database.*SQLite.GetColumnsOfTable B

↳ Parent: pkg/database/sqlite.go

Complexity

Conditions

Size

Total Lines	57
Code Lines	39

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	7
eloc	39
nop	1
dl	0
loc	57
rs	7.544
c	0
b	0
f	0

How to fix Long Method

package database

import (
	"database/sql"
	"fmt"

	"github.com/fraenky8/tables-to-go/pkg/settings"

	// sqlite3 database driver
	_ "github.com/mattn/go-sqlite3"
)

// SQLite implemenmts the Database interface with help of generalDatabase
type SQLite struct {
	*GeneralDatabase
}

// NewSQLite creates a new SQLite database
func NewSQLite(s *settings.Settings) *SQLite {
	return &SQLite{
		GeneralDatabase: &GeneralDatabase{
			Settings: s,
			driver:   dbTypeToDriverMap[s.DbType],
		},
	}
}

func (s *SQLite) Connect() (err error) {
	return s.GeneralDatabase.Connect(s.DSN(s.Settings))
}

func (s *SQLite) DSN(settings *settings.Settings) string {
	return fmt.Sprintf("%v", settings.DbName)
}

func (s *SQLite) GetDriverImportLibrary() string {
	return `"github.com/mattn/go-sqlite3"`
}

func (s *SQLite) GetTables() (tables []*Table, err error) {

	err = s.Select(&tables, `
		SELECT name AS table_name
		FROM sqlite_master
		WHERE type = 'table'
		AND name NOT LIKE 'sqlite?_%' escape '?'
	`)

	if s.Verbose {
		if err != nil {
			fmt.Println("> Error at GetTables()")
			fmt.Printf("> database: %q\r\n", s.DbName)
		}
	}

	return tables, err
}

func (s *SQLite) PrepareGetColumnsOfTableStmt() (err error) {
	return nil
}

func (s *SQLite) GetColumnsOfTable(table *Table) (err error) {

	rows, err := s.Queryx(`
		SELECT * 
		FROM PRAGMA_TABLE_INFO('` + table.Name + `')
	`)
	if err != nil {
		if s.Verbose {
			fmt.Printf("> Error at GetColumnsOfTable(%v)\r\n", table.Name)
			fmt.Printf("> database: %q\r\n", s.DbName)
		}
		return err
	}

	type column struct {
		CID          int            `db:"cid"`
		Name         string         `db:"name"`
		DataType     string         `db:"type"`
		NotNull      int            `db:"notnull"`
		DefaultValue sql.NullString `db:"dflt_value"`
		PrimaryKey   int            `db:"pk"`
	}

	for rows.Next() {
		var col column
		err = rows.StructScan(&col)
		if err != nil {
			return err
		}

		isNullable := "YES"
		if col.NotNull == 1 {
			isNullable = "NO"
		}

		isPrimaryKey := ""
		if col.PrimaryKey == 1 {
			isPrimaryKey = "PK"
		}

		table.Columns = append(table.Columns, Column{
			OrdinalPosition:        col.CID,
			Name:                   col.Name,
			DataType:               col.DataType,
			DefaultValue:           col.DefaultValue,
			IsNullable:             isNullable,
			CharacterMaximumLength: sql.NullInt64{},
			NumericPrecision:       sql.NullInt64{},
			// reuse mysql column_key as primary key indicator
			ColumnKey:      isPrimaryKey,
			Extra:          "",
			ConstraintName: sql.NullString{},
			ConstraintType: sql.NullString{},
		})
	}

	return nil
}

func (s *SQLite) IsPrimaryKey(column Column) bool {
	return column.ColumnKey == "PK"
}

func (s *SQLite) IsAutoIncrement(column Column) bool {
	return column.ColumnKey == "PK"
}

func (s *SQLite) GetStringDatatypes() []string {
	return []string{
		"text",
	}
}

func (s *SQLite) IsString(column Column) bool {
	return s.IsStringInSlice(column.DataType, s.GetStringDatatypes())
}

func (s *SQLite) GetTextDatatypes() []string {
	return []string{
		"text",
	}
}

func (s *SQLite) IsText(column Column) bool {
	return s.IsStringInSlice(column.DataType, s.GetTextDatatypes())
}

func (s *SQLite) GetIntegerDatatypes() []string {
	return []string{
		"integer",
	}
}

func (s *SQLite) IsInteger(column Column) bool {
	return s.IsStringInSlice(column.DataType, s.GetIntegerDatatypes())
}

func (s *SQLite) GetFloatDatatypes() []string {
	return []string{
		"real",
		"numeric",
	}
}

func (s *SQLite) IsFloat(column Column) bool {
	return s.IsStringInSlice(column.DataType, s.GetFloatDatatypes())
}

func (s *SQLite) GetTemporalDatatypes() []string {
	return []string{}
}

func (s *SQLite) IsTemporal(column Column) bool {
	return false
}

func (s *SQLite) GetTemporalDriverDataType() string {
	return ""
}


1			package database
2
3			import (
4			"database/sql"
5			"fmt"
6
7			"github.com/fraenky8/tables-to-go/pkg/settings"
8
9			// sqlite3 database driver
10			_ "github.com/mattn/go-sqlite3"
11			)
12
13			// SQLite implemenmts the Database interface with help of generalDatabase
14			type SQLite struct {
15			*GeneralDatabase
16			}
17
18			// NewSQLite creates a new SQLite database
19			func NewSQLite(s settings.Settings) SQLite {
20			return &SQLite{
21			GeneralDatabase: &GeneralDatabase{
22			Settings: s,
23			driver: dbTypeToDriverMap[s.DbType],
24			},
25			}
26			}
27
28			func (s *SQLite) Connect() (err error) {
29			return s.GeneralDatabase.Connect(s.DSN(s.Settings))
30			}
31
32			func (s SQLite) DSN(settings settings.Settings) string {
33			return fmt.Sprintf("%v", settings.DbName)
34			}
35
36			func (s *SQLite) GetDriverImportLibrary() string {
37			return `"github.com/mattn/go-sqlite3"`
38			}
39
40			func (s SQLite) GetTables() (tables []Table, err error) {
41
42			err = s.Select(&tables, `
43			SELECT name AS table_name
44			FROM sqlite_master
45			WHERE type = 'table'
46			AND name NOT LIKE 'sqlite?_%' escape '?'
47			`)
48
49			if s.Verbose {
50			if err != nil {
51			fmt.Println("> Error at GetTables()")
52			fmt.Printf("> database: %q\r\n", s.DbName)
53			}
54			}
55
56			return tables, err
57			}
58
59			func (s *SQLite) PrepareGetColumnsOfTableStmt() (err error) {
60			return nil
61			}
62
63			func (s SQLite) GetColumnsOfTable(table Table) (err error) {
64
65			rows, err := s.Queryx(`
66			SELECT *
67			FROM PRAGMA_TABLE_INFO('` + table.Name + `')
68			`)
69			if err != nil {
70			if s.Verbose {
71			fmt.Printf("> Error at GetColumnsOfTable(%v)\r\n", table.Name)
72			fmt.Printf("> database: %q\r\n", s.DbName)
73			}
74			return err
75			}
76
77			type column struct {
78			CID int `db:"cid"`
79			Name string `db:"name"`
80			DataType string `db:"type"`
81			NotNull int `db:"notnull"`
82			DefaultValue sql.NullString `db:"dflt_value"`
83			PrimaryKey int `db:"pk"`
84			}
85
86			for rows.Next() {
87			var col column
88			err = rows.StructScan(&col)
89			if err != nil {
90			return err
91			}
92
93			isNullable := "YES"
94			if col.NotNull == 1 {
95			isNullable = "NO"
96			}
97
98			isPrimaryKey := ""
99			if col.PrimaryKey == 1 {
100			isPrimaryKey = "PK"
101			}
102
103			table.Columns = append(table.Columns, Column{
104			OrdinalPosition: col.CID,
105			Name: col.Name,
106			DataType: col.DataType,
107			DefaultValue: col.DefaultValue,
108			IsNullable: isNullable,
109			CharacterMaximumLength: sql.NullInt64{},
110			NumericPrecision: sql.NullInt64{},
111			// reuse mysql column_key as primary key indicator
112			ColumnKey: isPrimaryKey,
113			Extra: "",
114			ConstraintName: sql.NullString{},
115			ConstraintType: sql.NullString{},
116			})
117			}
118
119			return nil
120			}
121
122			func (s *SQLite) IsPrimaryKey(column Column) bool {
123			return column.ColumnKey == "PK"
124			}
125
126			func (s *SQLite) IsAutoIncrement(column Column) bool {
127			return column.ColumnKey == "PK"
128			}
129
130			func (s *SQLite) GetStringDatatypes() []string {
131			return []string{
132			"text",
133			}
134			}
135
136			func (s *SQLite) IsString(column Column) bool {
137			return s.IsStringInSlice(column.DataType, s.GetStringDatatypes())
138			}
139
140			func (s *SQLite) GetTextDatatypes() []string {
141			return []string{
142			"text",
143			}
144			}
145
146			func (s *SQLite) IsText(column Column) bool {
147			return s.IsStringInSlice(column.DataType, s.GetTextDatatypes())
148			}
149
150			func (s *SQLite) GetIntegerDatatypes() []string {
151			return []string{
152			"integer",
153			}
154			}
155
156			func (s *SQLite) IsInteger(column Column) bool {
157			return s.IsStringInSlice(column.DataType, s.GetIntegerDatatypes())
158			}
159
160			func (s *SQLite) GetFloatDatatypes() []string {
161			return []string{
162			"real",
163			"numeric",
164			}
165			}
166
167			func (s *SQLite) IsFloat(column Column) bool {
168			return s.IsStringInSlice(column.DataType, s.GetFloatDatatypes())
169			}
170
171			func (s *SQLite) GetTemporalDatatypes() []string {
172			return []string{}
173			}
174
175			func (s *SQLite) IsTemporal(column Column) bool {
176			return false
177			}
178
179			func (s *SQLite) GetTemporalDriverDataType() string {
180			return ""
181			}
182

fraenky8 / tables-to-go

Push — ISSUE-22 ( 117fa4 )

database.*SQLite.GetColumnsOfTable B

Complexity

Size

Duplication

Importance

How to fix Long Method

Long Method

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