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    mysql-utilities

    1.1.2 • Public • Published

    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.

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    Installation

    $ 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:

    // Library dependencies
    const mysql = require('mysql');
    const mysqlUtilities = require('mysql-utilities');
    
    const connection = mysql.createConnection({
      host: 'localhost',
      user: 'userName',
      password: 'secret',
      database: 'databaseName',
    });
    
    connection.connect();
    
    // Mix-in for Data Access Methods and SQL Autogenerating Methods
    mysqlUtilities.upgrade(connection);
    
    // Mix-in for Introspection Methods
    mysqlUtilities.introspection(connection);
    
    // Do something using utilities
    connection.queryRow(
      'SELECT * FROM _Language where LanguageId=?',
      [3],
      (err, row) => {
        console.dir({ queryRow: row });
      }
    );
    
    // Release connection
    connection.end();

    Examples

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

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

    Output:

    queryRow: {
      LanguageId: 3,
      LanguageName: 'Russian',
      LanguageSign: 'ru',
      LanguageISO: 'ru',
      Caption: 'Русский'
    }

    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.

    connection.queryValue(
      'SELECT LanguageName FROM Language where LanguageId=?',
      [8],
      (err, name) => {
        console.dir({ queryValue: name });
      }
    );

    Output:

    {
      queryValue: 'Italiano';
    }

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

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

    Output:

    queryArray: ['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.

    connection.queryHash(
      'SELECT LanguageSign, LanguageId, LanguageName, Caption, LanguageISO FROM Language',
      [],
      (err, result) => {
        console.dir({ queryHash: result });
      }
    );

    Output:

    queryHash: {
      en: {
        LanguageSign: 'en',
        LanguageId: 2,
        LanguageName: 'English',
        Caption: 'Английский',
        LanguageISO: 'en' },
      ru: {
        LanguageSign: 'ru',
        LanguageId: 3,
        LanguageName: 'Russian',
        Caption: 'Русский',
        LanguageISO: 'ru' },
      de: {
        LanguageSign: 'de',
        LanguageId: 7,
        LanguageName: 'Deutsch',
        Caption: 'Немецкий',
        LanguageISO: 'de' },
      it: {
        LanguageSign: 'it',
        LanguageId: 8,
        LanguageName: 'Italiano',
        Caption: 'Итальянский',
        LanguageISO: 'it'
      }
    }

    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.

    connection.queryKeyValue(
      'SELECT LanguageISO, LanguageName FROM Language',
      [],
      (err, keyValue) => {
        console.dir({ queryKeyValue: keyValue });
      }
    );

    Output:

    keyValue: {
      en: 'English',
      ru: 'Russian',
      uk: 'Ukrainian',
      es: 'Espanol',
      fr: 'Francais',
      de: 'Deutsch',
      it: 'Italiano',
      pl: 'Poliski'
    }

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

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

    Output:

    primary: {
      Table: 'language',
      Non_unique: 0,
      Key_name: 'PRIMARY',
      Seq_in_index: 1,
      Column_name: 'LanguageId',
      Collation: 'A',
      Cardinality: 9,
      Sub_part: null,
      Packed: null,
      Null: '',
      Index_type: 'BTREE',
      Comment: '',
      Index_comment: ''
    }

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

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

    Output:

    foreign: {
      fkTemplateCaptionLanguage: {
        CONSTRAINT_NAME: 'fkTemplateCaptionLanguage',
        COLUMN_NAME: 'LanguageId',
        ORDINAL_POSITION: 1,
        POSITION_IN_UNIQUE_CONSTRAINT: 1,
        REFERENCED_TABLE_NAME: 'language',
        REFERENCED_COLUMN_NAME: 'LanguageId' },
      fkTemplateCaptionTemplate: {
        CONSTRAINT_NAME: 'fkTemplateCaptionTemplate',
        COLUMN_NAME: 'TemplateId',
        ORDINAL_POSITION: 1,
        POSITION_IN_UNIQUE_CONSTRAINT: 1,
        REFERENCED_TABLE_NAME: 'template',
        REFERENCED_COLUMN_NAME: 'TemplateId'
      }
    }

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

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

    Output:

    constraints: {
      fkTemplateCaptionLanguage: {
        CONSTRAINT_NAME: 'fkTemplateCaptionLanguage',
        UNIQUE_CONSTRAINT_NAME: 'PRIMARY',
        REFERENCED_TABLE_NAME: 'Language',
        MATCH_OPTION: 'NONE',
        UPDATE_RULE: 'RESTRICT',
        DELETE_RULE: 'CASCADE' },
      fkTemplateCaptionTemplate: {
        CONSTRAINT_NAME: 'fkTemplateCaptionTemplate',
        UNIQUE_CONSTRAINT_NAME: 'PRIMARY',
        REFERENCED_TABLE_NAME: 'Template',
        MATCH_OPTION: 'NONE',
        UPDATE_RULE: 'RESTRICT',
        DELETE_RULE: 'CASCADE'
      }
    }

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

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

    Output:

    fields: {
      LanguageId: {
        Field: 'LanguageId',
        Type: 'int(10) unsigned',
        Collation: null,
        Null: 'NO',
        Key: 'PRI',
        Default: null,
        Extra: 'auto_increment',
        Privileges: 'select,insert,update,references',
        Comment: 'Id(EN),Код(RU)' },
      LanguageName: {
        Field: 'LanguageName',
        Type: 'varchar(32)',
        Collation: 'utf8_general_ci',
        Null: 'NO',
        Key: 'UNI',
        Default: null,
        Extra: '',
        Privileges: 'select,insert,update,references',
        Comment: 'Name(EN),Имя(RU)'
      }, ...
    }

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

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

    Output:

    databases: [
      'information_schema',
      'mezha',
      'mysql',
      'performance_schema',
      'test',
    ];

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

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

    Output:

    tables: {
      Language: {
        TABLE_NAME: 'Language',
        TABLE_TYPE: 'BASE TABLE',
        ENGINE: 'InnoDB',
        VERSION: 10,
        ROW_FORMAT: 'Compact',
        TABLE_ROWS: 9,
        AVG_ROW_LENGTH: 1820,
        DATA_LENGTH: 16384,
        MAX_DATA_LENGTH: 0,
        INDEX_LENGTH: 49152,
        DATA_FREE: 8388608,
        AUTO_INCREMENT: 10,
        CREATE_TIME: Mon Jul 15 2013 03:06:08 GMT+0300 (Финляндия (лето)),
        UPDATE_TIME: null,
        CHECK_TIME: null,
        TABLE_COLLATION: 'utf8_general_ci',
        CHECKSUM: null,
        CREATE_OPTIONS: '',
        TABLE_COMMENT: '_Language:Languages(EN),Языки(RU)'
      }, ...
    }

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

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

    Output:

    tables: {
      Language: {
        TABLE_NAME: 'Language',
        TABLE_TYPE: 'BASE TABLE',
        ENGINE: 'InnoDB',
        VERSION: 10,
        ROW_FORMAT: 'Compact',
        TABLE_ROWS: 9,
        AVG_ROW_LENGTH: 1820,
        DATA_LENGTH: 16384,
        MAX_DATA_LENGTH: 0,
        INDEX_LENGTH: 49152,
        DATA_FREE: 8388608,
        AUTO_INCREMENT: 10,
        CREATE_TIME: Mon Jul 15 2013 03:06:08 GMT+0300 (Финляндия (лето)),
        UPDATE_TIME: null,
        CHECK_TIME: null,
        TABLE_COLLATION: 'utf8_general_ci',
        CHECKSUM: null,
        CREATE_OPTIONS: '',
        TABLE_COMMENT: '_Language:Languages(EN),Языки(RU)'
      }, ...
    }

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

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

    Output:

    tableInfo: {
      Name: 'language',
      Engine: 'InnoDB',
      Version: 10,
      Row_format: 'Compact',
      Rows: 9,
      Avg_row_length: 1820,
      Data_length: 16384,
      Max_data_length: 0,
      Index_length: 49152,
      Data_free: 9437184,
      Auto_increment: 10,
      Create_time: Mon Jul 15 2013 03:06:08 GMT+0300 (Финляндия (лето)),
      Update_time: null,
      Check_time: null,
      Collation: 'utf8_general_ci',
      Checksum: null,
      Create_options: '',
      Comment: ''
    }

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

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

    Output:

    indexes: {
      PRIMARY: {
        Table: 'language',
        Non_unique: 0,
        Key_name: 'PRIMARY',
        Seq_in_index: 1,
        Column_name: 'LanguageId',
        Collation: 'A',
        Cardinality: 9,
        Sub_part: null,
        Packed: null,
        Null: '',
        Index_type: 'BTREE',
        Comment: '',
        Index_comment: '' },
      akLanguage: {
        Table: 'language',
        Non_unique: 0,
        Key_name: 'akLanguage',
        Seq_in_index: 1,
        Column_name: 'LanguageName',
        Collation: 'A',
        Cardinality: 9,
        Sub_part: null,
        Packed: null,
        Null: '',
        Index_type: 'BTREE',
        Comment: '',
        Index_comment: ''
      }
    }

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

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

    Output:

    processes: [
      {
        ID: 62,
        USER: 'mezha',
        HOST: 'localhost:14188',
        DB: 'mezha',
        COMMAND: 'Query',
        TIME: 0,
        STATE: 'executing',
        INFO: 'SELECT * FROM information_schema.PROCESSLIST',
      },
      {
        ID: 33,
        USER: 'root',
        HOST: 'localhost:39589',
        DB: null,
        COMMAND: 'Sleep',
        TIME: 1,
        STATE: '',
        INFO: null,
      },
    ];

    Get MySQL global variables: connection.globalVariables(callback)

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

    Output:

    globalVariables: {
      MAX_PREPARED_STMT_COUNT: '16382',
      MAX_JOIN_SIZE: '18446744073709551615',
      HAVE_CRYPT: 'NO',
      PERFORMANCE_SCHEMA_EVENTS_WAITS_HISTORY_LONG_SIZE: '10000',
      INNODB_VERSION: '5.5.32',
      FLUSH_TIME: '1800',
      MAX_ERROR_COUNT: '64',
      ...
    }

    Get MySQL global status: connection.globalStatus(callback)

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

    Output:

    globalStatus: {
      ABORTED_CLIENTS: '54',
      ABORTED_CONNECTS: '2',
      BINLOG_CACHE_DISK_USE: '0',
      BINLOG_CACHE_USE: '0',
      BINLOG_STMT_CACHE_DISK_USE: '0',
      BINLOG_STMT_CACHE_USE: '0',
      BYTES_RECEIVED: '654871',
      BYTES_SENT: '212454927',
      COM_ADMIN_COMMANDS: '594',
      ...
    }

    Get MySQL user list: connection.users(callback)

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

    Output:

    users: [
      {
        Host: 'localhost',
        User: 'root',
        Password: '*90E462C37378CED12064BB3388827D2BA3A9B689',
        Select_priv: 'Y',
        Insert_priv: 'Y',
        Update_priv: 'Y',
        Delete_priv: 'Y',
        Create_priv: 'Y',
        Drop_priv: 'Y',
        Reload_priv: 'Y',
        Shutdown_priv: 'Y',
        Process_priv: 'Y',
        File_priv: 'Y',
        Grant_priv: 'Y',
        References_priv: 'Y',
        Index_priv: 'Y',
        Alter_priv: 'Y',
        Show_db_priv: 'Y',
        Super_priv: 'Y',
        Create_tmp_table_priv: 'Y',
        Lock_tables_priv: 'Y',
        Execute_priv: 'Y',
        Repl_slave_priv: 'Y',
        Repl_client_priv: 'Y',
        Create_view_priv: 'Y',
        Show_view_priv: 'Y',
        Create_routine_priv: 'Y',
        Alter_routine_priv: 'Y',
        Create_user_priv: 'Y',
        Event_priv: 'Y',
        Trigger_priv: 'Y',
        Create_tablespace_priv: 'Y',
        ssl_type: '',
        ssl_cipher: <Buffer >,
        x509_issuer: <Buffer >,
        x509_subject: <Buffer >,
        max_questions: 0,
        max_updates: 0,
        max_connections: 0,
        max_user_connections: 0,
        plugin: '',
        authentication_string: ''
      }, ...
    ]

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

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

    connection.select(
      'Language',
      '*',
      { LanguageId: '1..3' },
      { LanguageId: 'desc' },
      (err, results) => {
        console.dir({ select: results });
      }
    );

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

    connection.insert(
      'Language',
      {
        LanguageName: 'Tatar',
        LanguageSign: 'TT',
        LanguageISO: 'TT',
        Caption: 'Tatar',
      },
      (err, recordId) => {
        console.dir({ insert: recordId });
      }
    );

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

    connection.update(
      'Language',
      {
        LanguageId: 25,
        LanguageName: 'Tatarca',
        LanguageSign: 'TT',
        LanguageISO: 'TT',
        Caption: 'Tatarca',
      },
      (err, affectedRows) => {
        console.dir({ update: affectedRows });
      }
    );

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

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

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

    connection.upsert(
      'Language',
      {
        LanguageId: 25,
        LanguageName: 'Tatarca',
        LanguageSign: 'TT',
        LanguageISO: 'TT',
        Caption: 'Tatarca',
      },
      (err, affectedRows) => {
        console.dir({ upsert: affectedRows });
      }
    );

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

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

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

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

    Contributors

    • Timur Shemsedinov (marcusaurelius)
    • See github for full contributors list

    License

    Dual licensed under the MIT or RUMI licenses.

    Copyright (c) 2012-2021 MetaSystems <timur.shemsedinov@gmail.com>

    Install

    npm i mysql-utilities

    DownloadsWeekly Downloads

    4,497

    Version

    1.1.2

    License

    MIT

    Unpacked Size

    39.1 kB

    Total Files

    4

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