database.*Postgresql.GetFloatDatatypes - Code Metrics - Inspection of "Merge pull request #17 from fraenky8/ISSUE-10" - fraenky8/tables-to-go - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 8db7f7...d199cf )

by Frank

created 2019-06-24 13:01 UTC

database.*Postgresql.GetFloatDatatypes A

↳ Parent: pkg/database/postgresql.go

Complexity

Conditions

Size

Total Lines	6
Code Lines	6

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	1
eloc	6
nop	0
dl	0
loc	6
rs	10
c	0
b	0
f	0

package database

import (
	"fmt"
	"strings"

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

	// postgres database driver
	_ "github.com/lib/pq"
)

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

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

// Connect connects to the database by the given data source name (dsn) of the concrete database
func (pg *Postgresql) Connect() error {
	return pg.GeneralDatabase.Connect(pg.DSN(pg.Settings))
}

// DSN creates the DSN String to connect to this database
func (pg *Postgresql) DSN(settings *settings.Settings) string {
	return fmt.Sprintf("host=%v port=%v user=%v dbname=%v password=%v sslmode=disable",
		settings.Host, settings.Port, settings.User, settings.DbName, settings.Pswd)
}

// GetDriverImportLibrary returns the golang sql driver specific fot the MySQL database
func (pg *Postgresql) GetDriverImportLibrary() string {
	return "pg \"github.com/lib/pq\""
}

// GetTables gets all tables for a given schema by name
func (pg *Postgresql) GetTables() (tables []*Table, err error) {

	err = pg.Select(&tables, `
		SELECT table_name
		FROM information_schema.tables
		WHERE table_type = 'BASE TABLE'
		AND table_schema = $1
		ORDER BY table_name
	`, pg.Schema)

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

	return tables, err
}

// PrepareGetColumnsOfTableStmt prepares the statement for retrieving the columns of a specific table for a given database
func (pg *Postgresql) PrepareGetColumnsOfTableStmt() (err error) {

	pg.GetColumnsOfTableStmt, err = pg.Preparex(`
		SELECT
			ic.ordinal_position,
			ic.column_name,
			ic.data_type,
			ic.column_default,
			ic.is_nullable,
			ic.character_maximum_length,
			ic.numeric_precision,
			itc.constraint_name,
			itc.constraint_type
		FROM information_schema.columns AS ic
			LEFT JOIN information_schema.key_column_usage AS ikcu ON ic.table_name = ikcu.table_name
			AND ic.table_schema = ikcu.table_schema
			AND ic.column_name = ikcu.column_name
			LEFT JOIN information_schema.table_constraints AS itc ON ic.table_name = itc.table_name
			AND ic.table_schema = itc.table_schema
			AND ikcu.constraint_name = itc.constraint_name
		WHERE ic.table_name = $1
		AND ic.table_schema = $2
		ORDER BY ic.ordinal_position
	`)

	return err
}

// GetColumnsOfTable executes the statement for retrieving the columns of a specific table in a given schema
func (pg *Postgresql) GetColumnsOfTable(table *Table) (err error) {

	err = pg.GetColumnsOfTableStmt.Select(&table.Columns, table.Name, pg.Schema)

	if pg.Verbose {
		if err != nil {
			fmt.Printf("> Error at GetColumnsOfTable(%v)\r\n", table.Name)
			fmt.Printf("> schema: %q\r\n", pg.Schema)
		}
	}

	return err
}

// IsPrimaryKey checks if column belongs to primary key
func (pg *Postgresql) IsPrimaryKey(column Column) bool {
	return strings.Contains(column.ConstraintType.String, "PRIMARY KEY")
}

// IsAutoIncrement checks if column is a serial column
func (pg *Postgresql) IsAutoIncrement(column Column) bool {
	return strings.Contains(column.DefaultValue.String, "nextval")
}

// GetStringDatatypes returns the string datatypes for the postgre database
func (pg *Postgresql) GetStringDatatypes() []string {
	return []string{
		"character varying",
		"varchar",
		"character",
		"char",
	}
}

// IsString returns true if colum is of type string for the postgre database
func (pg *Postgresql) IsString(column Column) bool {
	return pg.IsStringInSlice(column.DataType, pg.GetStringDatatypes())
}

// GetTextDatatypes returns the text datatypes for the postgre database
func (pg *Postgresql) GetTextDatatypes() []string {
	return []string{
		"text",
	}
}

// IsText returns true if colum is of type text for the postgre database
func (pg *Postgresql) IsText(column Column) bool {
	return pg.IsStringInSlice(column.DataType, pg.GetTextDatatypes())
}

// GetIntegerDatatypes returns the integer datatypes for the postgre database
func (pg *Postgresql) GetIntegerDatatypes() []string {
	return []string{
		"smallint",
		"integer",
		"bigint",
		"smallserial",
		"serial",
		"bigserial",
	}
}

// IsInteger returns true if colum is of type integer for the postgre database
func (pg *Postgresql) IsInteger(column Column) bool {
	return pg.IsStringInSlice(column.DataType, pg.GetIntegerDatatypes())
}

// GetFloatDatatypes returns the float datatypes for the postgre database
func (pg *Postgresql) GetFloatDatatypes() []string {
	return []string{
		"numeric",
		"decimal",
		"real",
		"double precision",
	}
}

// IsFloat returns true if colum is of type float for the postgre database
func (pg *Postgresql) IsFloat(column Column) bool {
	return pg.IsStringInSlice(column.DataType, pg.GetFloatDatatypes())
}

// GetTemporalDatatypes returns the temporal datatypes for the postgre database
func (pg *Postgresql) GetTemporalDatatypes() []string {
	return []string{
		"time",
		"timestamp",
		"time with time zone",
		"timestamp with time zone",
		"time without time zone",
		"timestamp without time zone",
		"date",
	}
}

// IsTemporal returns true if colum is of type temporal for the postgre database
func (pg *Postgresql) IsTemporal(column Column) bool {
	return pg.IsStringInSlice(column.DataType, pg.GetTemporalDatatypes())
}

// GetTemporalDriverDataType returns the time data type specific for the postgre database
func (pg *Postgresql) GetTemporalDriverDataType() string {
	return "pg.NullTime"
}


1			package database
2
3			import (
4			"fmt"
5			"strings"
6
7			"github.com/fraenky8/tables-to-go/pkg/settings"
8
9			// postgres database driver
10			_ "github.com/lib/pq"
11			)
12
13			// Postgresql implemenmts the Database interface with help of generalDatabase
14			type Postgresql struct {
15			*GeneralDatabase
16			}
17
18			// NewPostgresql creates a new Postgresql database
19			func NewPostgresql(s settings.Settings) Postgresql {
20			return &Postgresql{
21			GeneralDatabase: &GeneralDatabase{
22			Settings: s,
23			driver: dbTypeToDriverMap[settings.DbType(s.DbType)],
24			},
25			}
26			}
27
28			// Connect connects to the database by the given data source name (dsn) of the concrete database
29			func (pg *Postgresql) Connect() error {
30			return pg.GeneralDatabase.Connect(pg.DSN(pg.Settings))
31			}
32
33			// DSN creates the DSN String to connect to this database
34			func (pg Postgresql) DSN(settings settings.Settings) string {
35			return fmt.Sprintf("host=%v port=%v user=%v dbname=%v password=%v sslmode=disable",
36			settings.Host, settings.Port, settings.User, settings.DbName, settings.Pswd)
37			}
38
39			// GetDriverImportLibrary returns the golang sql driver specific fot the MySQL database
40			func (pg *Postgresql) GetDriverImportLibrary() string {
41			return "pg \"github.com/lib/pq\""
42			}
43
44			// GetTables gets all tables for a given schema by name
45			func (pg Postgresql) GetTables() (tables []Table, err error) {
46
47			err = pg.Select(&tables, `
48			SELECT table_name
49			FROM information_schema.tables
50			WHERE table_type = 'BASE TABLE'
51			AND table_schema = $1
52			ORDER BY table_name
53			`, pg.Schema)
54
55			if pg.Verbose {
56			if err != nil {
57			fmt.Println("> Error at GetTables()")
58			fmt.Printf("> schema: %q\r\n", pg.Schema)
59			}
60			}
61
62			return tables, err
63			}
64
65			// PrepareGetColumnsOfTableStmt prepares the statement for retrieving the columns of a specific table for a given database
66			func (pg *Postgresql) PrepareGetColumnsOfTableStmt() (err error) {
67
68			pg.GetColumnsOfTableStmt, err = pg.Preparex(`
69			SELECT
70			ic.ordinal_position,
71			ic.column_name,
72			ic.data_type,
73			ic.column_default,
74			ic.is_nullable,
75			ic.character_maximum_length,
76			ic.numeric_precision,
77			itc.constraint_name,
78			itc.constraint_type
79			FROM information_schema.columns AS ic
80			LEFT JOIN information_schema.key_column_usage AS ikcu ON ic.table_name = ikcu.table_name
81			AND ic.table_schema = ikcu.table_schema
82			AND ic.column_name = ikcu.column_name
83			LEFT JOIN information_schema.table_constraints AS itc ON ic.table_name = itc.table_name
84			AND ic.table_schema = itc.table_schema
85			AND ikcu.constraint_name = itc.constraint_name
86			WHERE ic.table_name = $1
87			AND ic.table_schema = $2
88			ORDER BY ic.ordinal_position
89			`)
90
91			return err
92			}
93
94			// GetColumnsOfTable executes the statement for retrieving the columns of a specific table in a given schema
95			func (pg Postgresql) GetColumnsOfTable(table Table) (err error) {
96
97			err = pg.GetColumnsOfTableStmt.Select(&table.Columns, table.Name, pg.Schema)
98
99			if pg.Verbose {
100			if err != nil {
101			fmt.Printf("> Error at GetColumnsOfTable(%v)\r\n", table.Name)
102			fmt.Printf("> schema: %q\r\n", pg.Schema)
103			}
104			}
105
106			return err
107			}
108
109			// IsPrimaryKey checks if column belongs to primary key
110			func (pg *Postgresql) IsPrimaryKey(column Column) bool {
111			return strings.Contains(column.ConstraintType.String, "PRIMARY KEY")
112			}
113
114			// IsAutoIncrement checks if column is a serial column
115			func (pg *Postgresql) IsAutoIncrement(column Column) bool {
116			return strings.Contains(column.DefaultValue.String, "nextval")
117			}
118
119			// GetStringDatatypes returns the string datatypes for the postgre database
120			func (pg *Postgresql) GetStringDatatypes() []string {
121			return []string{
122			"character varying",
123			"varchar",
124			"character",
125			"char",
126			}
127			}
128
129			// IsString returns true if colum is of type string for the postgre database
130			func (pg *Postgresql) IsString(column Column) bool {
131			return pg.IsStringInSlice(column.DataType, pg.GetStringDatatypes())
132			}
133
134			// GetTextDatatypes returns the text datatypes for the postgre database
135			func (pg *Postgresql) GetTextDatatypes() []string {
136			return []string{
137			"text",
138			}
139			}
140
141			// IsText returns true if colum is of type text for the postgre database
142			func (pg *Postgresql) IsText(column Column) bool {
143			return pg.IsStringInSlice(column.DataType, pg.GetTextDatatypes())
144			}
145
146			// GetIntegerDatatypes returns the integer datatypes for the postgre database
147			func (pg *Postgresql) GetIntegerDatatypes() []string {
148			return []string{
149			"smallint",
150			"integer",
151			"bigint",
152			"smallserial",
153			"serial",
154			"bigserial",
155			}
156			}
157
158			// IsInteger returns true if colum is of type integer for the postgre database
159			func (pg *Postgresql) IsInteger(column Column) bool {
160			return pg.IsStringInSlice(column.DataType, pg.GetIntegerDatatypes())
161			}
162
163			// GetFloatDatatypes returns the float datatypes for the postgre database
164			func (pg *Postgresql) GetFloatDatatypes() []string {
165			return []string{
166			"numeric",
167			"decimal",
168			"real",
169			"double precision",
170			}
171			}
172
173			// IsFloat returns true if colum is of type float for the postgre database
174			func (pg *Postgresql) IsFloat(column Column) bool {
175			return pg.IsStringInSlice(column.DataType, pg.GetFloatDatatypes())
176			}
177
178			// GetTemporalDatatypes returns the temporal datatypes for the postgre database
179			func (pg *Postgresql) GetTemporalDatatypes() []string {
180			return []string{
181			"time",
182			"timestamp",
183			"time with time zone",
184			"timestamp with time zone",
185			"time without time zone",
186			"timestamp without time zone",
187			"date",
188			}
189			}
190
191			// IsTemporal returns true if colum is of type temporal for the postgre database
192			func (pg *Postgresql) IsTemporal(column Column) bool {
193			return pg.IsStringInSlice(column.DataType, pg.GetTemporalDatatypes())
194			}
195
196			// GetTemporalDriverDataType returns the time data type specific for the postgre database
197			func (pg *Postgresql) GetTemporalDriverDataType() string {
198			return "pg.NullTime"
199			}
200

fraenky8 / tables-to-go

Push — master ( 8db7f7...d199cf )

database.*Postgresql.GetFloatDatatypes A

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