Node MySql Utilities

Utilities for node-mysql driver with specialized result types, introspection and other helpful functionality for node.js. Initially this utilities were part of Impress Application Server and extracted separately for use with other frameworks.

Installation

1$ npm install mysql-utilities

Features

• MySQL Data Access Methods
  • Query selecting single row: connection.queryRow(sql, values, callback)
  • Query selecting scalar (single value): connection.queryValue(sql, values, callback)
  • Query selecting column into array: connection.queryCol(sql, values, callback)
  • Query selecting hash of records: connection.queryHash(sql, values, callback)
  • Query selecting key/value hash: connection.queryKeyValue(sql, values, callback)
• MySQL Introspection Methods
  • Get primary key metadata: connection.primary(table, callback)
  • Get foreign key metadata: connection.foreign(table, callback)
  • Get table constraints metadata: connection.constraints(table, callback)
  • Get table fields metadata: connection.fields(table, callback)
  • Get connection databases array: connection.databases(callback)
  • Get database tables list for current db: connection.tables(callback)
  • Get database tables list for given db: connection.databaseTables(database, callback)
  • Get table metadata: connection.tableInfo(table, callback)
  • Get table indexes metadata: connection.indexes(table, callback)
  • Get server process list: connection.processes(callback)
  • Get server global variables: connection.globalVariables(callback)
  • Get server global status: connection.globalStatus(callback)
  • Get database users: connection.users(callback)
• MySQL SQL Statements Autogenerating Methods
  • Selecting record(s): connection.select(table, whereFilter, callback)
  • Inserting record: connection.insert(table, row, callback)
  • Updating record: connection.update(table, row, where, callback)
  • Inserting or selecting record: connection.upsert(table, row, callback)
  • Count records with filter: connection.count(table, whereFilter, callback)
  • Delete record(s): connection.delete(table, whereFilter, callback)
• Events
  • Catch any query execution: connection.on('query', function(err, res, fields, query) {});
  • Catch errors: connection.on('error', function(err, query) {});
  • Catch slow query execution: connection.on('slow', function(err, res, fields, query, executionTime) {});

Initialization

Utilities can be attached to connection using mix-ins:

1// Library dependencies
2const mysql = require('mysql');
3const mysqlUtilities = require('mysql-utilities');
4
5const connection = mysql.createConnection({
6  host: 'localhost',
7  user: 'userName',
8  password: 'secret',
9  database: 'databaseName',
10});
11
12connection.connect();
13
14// Mix-in for Data Access Methods and SQL Autogenerating Methods
15mysqlUtilities.upgrade(connection);
16
17// Mix-in for Introspection Methods
18mysqlUtilities.introspection(connection);
19
20// Do something using utilities
21connection.queryRow(
22  'SELECT * FROM _Language where LanguageId=?',
23  [3],
24  (err, row) => {
25    console.dir({ queryRow: row });
26  }
27);
28
29// Release connection
30connection.end();

Examples

Single row selection: connection.queryRow(sql, values, callback) returns hash as callback second parameter, field names becomes hash keys.

1connection.queryRow(
2  'SELECT * FROM Language where LanguageId=?',
3  [3],
4  (err, row) => {
5    console.dir({ queryRow: row });
6  }
7);

Output:

1queryRow: {
2  LanguageId: 3,
3  LanguageName: 'Russian',
4  LanguageSign: 'ru',
5  LanguageISO: 'ru',
6  Caption: 'Русский'
7}

Single value selection: connection.queryValue(sql, values, callback) returns single value as callback second parameter (instead of array in array). For example, for Id selection by name with LIMIT 1 or count(*), max(field) etc.

1connection.queryValue(
2  'SELECT LanguageName FROM Language where LanguageId=?',
3  [8],
4  (err, name) => {
5    console.dir({ queryValue: name });
6  }
7);

Output:

1{
2  queryValue: 'Italiano';
3}

Single column selection: connection.queryCol(sql, values, callback) returns array as callback second parameter.

1connection.queryCol('SELECT LanguageSign FROM Language', [], (err, result) => {
2  console.dir({ queryCal: result });
3});

Output:

1queryArray: ['de', 'en', 'es', 'fr', 'it', 'pl', 'ru', 'ua'];

Hash selection: connection.queryHash(sql, values, callback) returns hash as callback second parameter, hash keyed by first field values from SQL statement.

1connection.queryHash(
2  'SELECT LanguageSign, LanguageId, LanguageName, Caption, LanguageISO FROM Language',
3  [],
4  (err, result) => {
5    console.dir({ queryHash: result });
6  }
7);

Output:

1queryHash: {
2  en: {
3    LanguageSign: 'en',
4    LanguageId: 2,
5    LanguageName: 'English',
6    Caption: 'Английский',
7    LanguageISO: 'en' },
8  ru: {
9    LanguageSign: 'ru',
10    LanguageId: 3,
11    LanguageName: 'Russian',
12    Caption: 'Русский',
13    LanguageISO: 'ru' },
14  de: {
15    LanguageSign: 'de',
16    LanguageId: 7,
17    LanguageName: 'Deutsch',
18    Caption: 'Немецкий',
19    LanguageISO: 'de' },
20  it: {
21    LanguageSign: 'it',
22    LanguageId: 8,
23    LanguageName: 'Italiano',
24    Caption: 'Итальянский',
25    LanguageISO: 'it'
26  }
27}

Key/value pair selection: connection.queryKeyValue(sql, values, callback) returns hash as callback second parameter, hash keyed by first field, values filled by second field.

1connection.queryKeyValue(
2  'SELECT LanguageISO, LanguageName FROM Language',
3  [],
4  (err, keyValue) => {
5    console.dir({ queryKeyValue: keyValue });
6  }
7);

Output:

1keyValue: {
2  en: 'English',
3  ru: 'Russian',
4  uk: 'Ukrainian',
5  es: 'Espanol',
6  fr: 'Francais',
7  de: 'Deutsch',
8  it: 'Italiano',
9  pl: 'Poliski'
10}

Get primary key list with metadata: connection.primary(table, callback) returns metadata as callback second parameter.

1connection.primary('Language', (err, primary) => {
2  console.dir({ primary });
3});

Output:

1primary: {
2  Table: 'language',
3  Non_unique: 0,
4  Key_name: 'PRIMARY',
5  Seq_in_index: 1,
6  Column_name: 'LanguageId',
7  Collation: 'A',
8  Cardinality: 9,
9  Sub_part: null,
10  Packed: null,
11  Null: '',
12  Index_type: 'BTREE',
13  Comment: '',
14  Index_comment: ''
15}

Get foreign key list with metadata: connection.foreign(table, callback) returns metadata as callback second parameter.

1connection.foreign('TemplateCaption', (err, foreign) => {
2  console.dir({ foreign });
3});

Output:

1foreign: {
2  fkTemplateCaptionLanguage: {
3    CONSTRAINT_NAME: 'fkTemplateCaptionLanguage',
4    COLUMN_NAME: 'LanguageId',
5    ORDINAL_POSITION: 1,
6    POSITION_IN_UNIQUE_CONSTRAINT: 1,
7    REFERENCED_TABLE_NAME: 'language',
8    REFERENCED_COLUMN_NAME: 'LanguageId' },
9  fkTemplateCaptionTemplate: {
10    CONSTRAINT_NAME: 'fkTemplateCaptionTemplate',
11    COLUMN_NAME: 'TemplateId',
12    ORDINAL_POSITION: 1,
13    POSITION_IN_UNIQUE_CONSTRAINT: 1,
14    REFERENCED_TABLE_NAME: 'template',
15    REFERENCED_COLUMN_NAME: 'TemplateId'
16  }
17}

Referential constraints list with metadata: connection.constraints(table, callback).

1connection.constraints('TemplateCaption', (err, constraints) => {
2  console.dir({ constraints });
3});

Output:

1constraints: {
2  fkTemplateCaptionLanguage: {
3    CONSTRAINT_NAME: 'fkTemplateCaptionLanguage',
4    UNIQUE_CONSTRAINT_NAME: 'PRIMARY',
5    REFERENCED_TABLE_NAME: 'Language',
6    MATCH_OPTION: 'NONE',
7    UPDATE_RULE: 'RESTRICT',
8    DELETE_RULE: 'CASCADE' },
9  fkTemplateCaptionTemplate: {
10    CONSTRAINT_NAME: 'fkTemplateCaptionTemplate',
11    UNIQUE_CONSTRAINT_NAME: 'PRIMARY',
12    REFERENCED_TABLE_NAME: 'Template',
13    MATCH_OPTION: 'NONE',
14    UPDATE_RULE: 'RESTRICT',
15    DELETE_RULE: 'CASCADE'
16  }
17}

Get table fields with metadata: connection.fields(table, callback).

1connection.fields('Language', (err, fields) => {
2  console.dir({ fields });
3});

Output:

1fields: {
2  LanguageId: {
3    Field: 'LanguageId',
4    Type: 'int(10) unsigned',
5    Collation: null,
6    Null: 'NO',
7    Key: 'PRI',
8    Default: null,
9    Extra: 'auto_increment',
10    Privileges: 'select,insert,update,references',
11    Comment: 'Id(EN),Код(RU)' },
12  LanguageName: {
13    Field: 'LanguageName',
14    Type: 'varchar(32)',
15    Collation: 'utf8_general_ci',
16    Null: 'NO',
17    Key: 'UNI',
18    Default: null,
19    Extra: '',
20    Privileges: 'select,insert,update,references',
21    Comment: 'Name(EN),Имя(RU)'
22  }, ...
23}

Get database list for current connection: connection.databases(callback).

1connection.databases((err, databases) => {
2  console.dir({ databases });
3});

Output:

1databases: [
2  'information_schema',
3  'mezha',
4  'mysql',
5  'performance_schema',
6  'test',
7];

Get table list for current database: connection.tables(callback).

1connection.tables((err, tables) => {
2  console.dir({ tables });
3});

Output:

1tables: {
2  Language: {
3    TABLE_NAME: 'Language',
4    TABLE_TYPE: 'BASE TABLE',
5    ENGINE: 'InnoDB',
6    VERSION: 10,
7    ROW_FORMAT: 'Compact',
8    TABLE_ROWS: 9,
9    AVG_ROW_LENGTH: 1820,
10    DATA_LENGTH: 16384,
11    MAX_DATA_LENGTH: 0,
12    INDEX_LENGTH: 49152,
13    DATA_FREE: 8388608,
14    AUTO_INCREMENT: 10,
15    CREATE_TIME: Mon Jul 15 2013 03:06:08 GMT+0300 (Финляндия (лето)),
16    UPDATE_TIME: null,
17    CHECK_TIME: null,
18    TABLE_COLLATION: 'utf8_general_ci',
19    CHECKSUM: null,
20    CREATE_OPTIONS: '',
21    TABLE_COMMENT: '_Language:Languages(EN),Языки(RU)'
22  }, ...
23}

Get table list for specified database: connection.databaseTables(database, callback).

1connection.databaseTables('databaseName', (err, tables) => {
2  console.dir({ databaseTables: tables });
3});

Output:

1tables: {
2  Language: {
3    TABLE_NAME: 'Language',
4    TABLE_TYPE: 'BASE TABLE',
5    ENGINE: 'InnoDB',
6    VERSION: 10,
7    ROW_FORMAT: 'Compact',
8    TABLE_ROWS: 9,
9    AVG_ROW_LENGTH: 1820,
10    DATA_LENGTH: 16384,
11    MAX_DATA_LENGTH: 0,
12    INDEX_LENGTH: 49152,
13    DATA_FREE: 8388608,
14    AUTO_INCREMENT: 10,
15    CREATE_TIME: Mon Jul 15 2013 03:06:08 GMT+0300 (Финляндия (лето)),
16    UPDATE_TIME: null,
17    CHECK_TIME: null,
18    TABLE_COLLATION: 'utf8_general_ci',
19    CHECKSUM: null,
20    CREATE_OPTIONS: '',
21    TABLE_COMMENT: '_Language:Languages(EN),Языки(RU)'
22  }, ...
23}

Get table metadata: connection.tableInfo(table, callback).

1connection.tableInfo('Language', (err, info) => {
2  console.dir({ tableInfo: info });
3});

Output:

1tableInfo: {
2  Name: 'language',
3  Engine: 'InnoDB',
4  Version: 10,
5  Row_format: 'Compact',
6  Rows: 9,
7  Avg_row_length: 1820,
8  Data_length: 16384,
9  Max_data_length: 0,
10  Index_length: 49152,
11  Data_free: 9437184,
12  Auto_increment: 10,
13  Create_time: Mon Jul 15 2013 03:06:08 GMT+0300 (Финляндия (лето)),
14  Update_time: null,
15  Check_time: null,
16  Collation: 'utf8_general_ci',
17  Checksum: null,
18  Create_options: '',
19  Comment: ''
20}

Get table indexes metadata: connection.indexes(table, callback).

1connection.indexes('Language', function (err, info) {
2  console.dir({ tableInfo: info });
3});

Output:

1indexes: {
2  PRIMARY: {
3    Table: 'language',
4    Non_unique: 0,
5    Key_name: 'PRIMARY',
6    Seq_in_index: 1,
7    Column_name: 'LanguageId',
8    Collation: 'A',
9    Cardinality: 9,
10    Sub_part: null,
11    Packed: null,
12    Null: '',
13    Index_type: 'BTREE',
14    Comment: '',
15    Index_comment: '' },
16  akLanguage: {
17    Table: 'language',
18    Non_unique: 0,
19    Key_name: 'akLanguage',
20    Seq_in_index: 1,
21    Column_name: 'LanguageName',
22    Collation: 'A',
23    Cardinality: 9,
24    Sub_part: null,
25    Packed: null,
26    Null: '',
27    Index_type: 'BTREE',
28    Comment: '',
29    Index_comment: ''
30  }
31}

Get MySQL process list: connection.processes(callback).

1connection.processes(function (err, processes) {
2  console.dir({ processes });
3});

Output:

1processes: [
2  {
3    ID: 62,
4    USER: 'mezha',
5    HOST: 'localhost:14188',
6    DB: 'mezha',
7    COMMAND: 'Query',
8    TIME: 0,
9    STATE: 'executing',
10    INFO: 'SELECT * FROM information_schema.PROCESSLIST',
11  },
12  {
13    ID: 33,
14    USER: 'root',
15    HOST: 'localhost:39589',
16    DB: null,
17    COMMAND: 'Sleep',
18    TIME: 1,
19    STATE: '',
20    INFO: null,
21  },
22];

Get MySQL global variables: connection.globalVariables(callback)

1connection.globalVariables((err, globalVariables) => {
2  console.dir({ globalVariables });
3});

Output:

1globalVariables: {
2  MAX_PREPARED_STMT_COUNT: '16382',
3  MAX_JOIN_SIZE: '18446744073709551615',
4  HAVE_CRYPT: 'NO',
5  PERFORMANCE_SCHEMA_EVENTS_WAITS_HISTORY_LONG_SIZE: '10000',
6  INNODB_VERSION: '5.5.32',
7  FLUSH_TIME: '1800',
8  MAX_ERROR_COUNT: '64',
9  ...
10}

Get MySQL global status: connection.globalStatus(callback)

1connection.globalStatus((err, globalStatus) => {
2  console.dir({ globalStatus });
3});

Output:

1globalStatus: {
2  ABORTED_CLIENTS: '54',
3  ABORTED_CONNECTS: '2',
4  BINLOG_CACHE_DISK_USE: '0',
5  BINLOG_CACHE_USE: '0',
6  BINLOG_STMT_CACHE_DISK_USE: '0',
7  BINLOG_STMT_CACHE_USE: '0',
8  BYTES_RECEIVED: '654871',
9  BYTES_SENT: '212454927',
10  COM_ADMIN_COMMANDS: '594',
11  ...
12}

Get MySQL user list: connection.users(callback)

1connection.users((err, users) => {
2  console.dir({ users });
3});

Output:

1users: [
2  {
3    Host: 'localhost',
4    User: 'root',
5    Password: '*90E462C37378CED12064BB3388827D2BA3A9B689',
6    Select_priv: 'Y',
7    Insert_priv: 'Y',
8    Update_priv: 'Y',
9    Delete_priv: 'Y',
10    Create_priv: 'Y',
11    Drop_priv: 'Y',
12    Reload_priv: 'Y',
13    Shutdown_priv: 'Y',
14    Process_priv: 'Y',
15    File_priv: 'Y',
16    Grant_priv: 'Y',
17    References_priv: 'Y',
18    Index_priv: 'Y',
19    Alter_priv: 'Y',
20    Show_db_priv: 'Y',
21    Super_priv: 'Y',
22    Create_tmp_table_priv: 'Y',
23    Lock_tables_priv: 'Y',
24    Execute_priv: 'Y',
25    Repl_slave_priv: 'Y',
26    Repl_client_priv: 'Y',
27    Create_view_priv: 'Y',
28    Show_view_priv: 'Y',
29    Create_routine_priv: 'Y',
30    Alter_routine_priv: 'Y',
31    Create_user_priv: 'Y',
32    Event_priv: 'Y',
33    Trigger_priv: 'Y',
34    Create_tablespace_priv: 'Y',
35    ssl_type: '',
36    ssl_cipher: <Buffer >,
37    x509_issuer: <Buffer >,
38    x509_subject: <Buffer >,
39    max_questions: 0,
40    max_updates: 0,
41    max_connections: 0,
42    max_user_connections: 0,
43    plugin: '',
44    authentication_string: ''
45  }, ...
46]

Generate MySQL WHERE statement: connection.where(conditions), works synchronously, no callback. Returns WHERE statement for given JSON-style conditions.

1const where = connection.where({
2  id: 5,
3  year: '>2010',
4  price: '100..200',
5  level: '<=3',
6  sn: '*str?',
7  label: 'str',
8  code: '(1,2,4,10,11)',
9});
10console.dir(where);
11// Output: "id = 5 AND year > '2010' AND (price BETWEEN '100' AND '200') AND
12// level <= '3' AND sn LIKE '%str_' AND label = 'str' AND code IN (1,2,4,10,11)"

Generate SELECT statement: connection.select(table, whereFilter, orderBy, callback)

1connection.select(
2  'Language',
3  '*',
4  { LanguageId: '1..3' },
5  { LanguageId: 'desc' },
6  (err, results) => {
7    console.dir({ select: results });
8  }
9);

Generate INSERT statement: connection.insert(table, row, callback)

1connection.insert(
2  'Language',
3  {
4    LanguageName: 'Tatar',
5    LanguageSign: 'TT',
6    LanguageISO: 'TT',
7    Caption: 'Tatar',
8  },
9  (err, recordId) => {
10    console.dir({ insert: recordId });
11  }
12);

Generate UPDATE statement: connection.update(table, row, callback)

1connection.update(
2  'Language',
3  {
4    LanguageId: 25,
5    LanguageName: 'Tatarca',
6    LanguageSign: 'TT',
7    LanguageISO: 'TT',
8    Caption: 'Tatarca',
9  },
10  (err, affectedRows) => {
11    console.dir({ update: affectedRows });
12  }
13);

Generate UPDATE statement with "where": connection.update(table, row, where, callback)

1connection.update(
2  'Language',
3  { LanguageSign: 'TT' },
4  { LanguageId: 1 },
5  (err, affectedRows) => {
6    console.dir({ update: affectedRows });
7  }
8);

Generate INSERT statement if record not exists or UPDATE if it exists: connection.upsert(table, row, callback)

1connection.upsert(
2  'Language',
3  {
4    LanguageId: 25,
5    LanguageName: 'Tatarca',
6    LanguageSign: 'TT',
7    LanguageISO: 'TT',
8    Caption: 'Tatarca',
9  },
10  (err, affectedRows) => {
11    console.dir({ upsert: affectedRows });
12  }
13);

Get record count: connection.count(table, whereFilter, callback)

1connection.count('Language', { LanguageId: '>3' }, (err, count) => {
2  console.dir({ count });
3  // count: 9
4});

Generate DELETE statement: connection.delete(table, whereFilter, callback)

1connection.delete('Language', { LanguageSign: 'TT' }, (err, affectedRows) => {
2  console.dir({ delete: affectedRows });
3});

License & Contributors

Copyright (c) 2012-2021 Metarhia <timur.shemsedinov@gmail.com> See github for full contributors list. Node MySql Utilities is MIT licensed.