Initial commit

node_modules/knex/lib/dialects/mysql/index.js

@@ -0,0 +1,206 @@
+// MySQL Client
+// -------
+const defer = require('lodash/defer');
+const map = require('lodash/map');
+const { promisify } = require('util');
+const Client = require('../../client');
+
+const Transaction = require('./transaction');
+const QueryBuilder = require('./query/mysql-querybuilder');
+const QueryCompiler = require('./query/mysql-querycompiler');
+const SchemaCompiler = require('./schema/mysql-compiler');
+const TableCompiler = require('./schema/mysql-tablecompiler');
+const ColumnCompiler = require('./schema/mysql-columncompiler');
+
+const { makeEscape } = require('../../util/string');
+const ViewCompiler = require('./schema/mysql-viewcompiler');
+const ViewBuilder = require('./schema/mysql-viewbuilder');
+
+// Always initialize with the "QueryBuilder" and "QueryCompiler"
+// objects, which extend the base 'lib/query/builder' and
+// 'lib/query/compiler', respectively.
+class Client_MySQL extends Client {
+  _driver() {
+    return require('mysql');
+  }
+
+  queryBuilder() {
+    return new QueryBuilder(this);
+  }
+
+  queryCompiler(builder, formatter) {
+    return new QueryCompiler(this, builder, formatter);
+  }
+
+  schemaCompiler() {
+    return new SchemaCompiler(this, ...arguments);
+  }
+
+  tableCompiler() {
+    return new TableCompiler(this, ...arguments);
+  }
+
+  viewCompiler() {
+    return new ViewCompiler(this, ...arguments);
+  }
+
+  viewBuilder() {
+    return new ViewBuilder(this, ...arguments);
+  }
+
+  columnCompiler() {
+    return new ColumnCompiler(this, ...arguments);
+  }
+
+  transaction() {
+    return new Transaction(this, ...arguments);
+  }
+
+  wrapIdentifierImpl(value) {
+    return value !== '*' ? `\`${value.replace(/`/g, '``')}\`` : '*';
+  }
+
+  // Get a raw connection, called by the `pool` whenever a new
+  // connection needs to be added to the pool.
+  acquireRawConnection() {
+    return new Promise((resolver, rejecter) => {
+      const connection = this.driver.createConnection(this.connectionSettings);
+      connection.on('error', (err) => {
+        connection.__knex__disposed = err;
+      });
+      connection.connect((err) => {
+        if (err) {
+          // if connection is rejected, remove listener that was registered above...
+          connection.removeAllListeners();
+          return rejecter(err);
+        }
+        resolver(connection);
+      });
+    });
+  }
+
+  // Used to explicitly close a connection, called internally by the pool
+  // when a connection times out or the pool is shutdown.
+  async destroyRawConnection(connection) {
+    try {
+      const end = promisify((cb) => connection.end(cb));
+      return await end();
+    } catch (err) {
+      connection.__knex__disposed = err;
+    } finally {
+      // see discussion https://github.com/knex/knex/pull/3483
+      defer(() => connection.removeAllListeners());
+    }
+  }
+
+  validateConnection(connection) {
+    return (
+      connection.state === 'connected' || connection.state === 'authenticated'
+    );
+  }
+
+  // Grab a connection, run the query via the MySQL streaming interface,
+  // and pass that through to the stream we've sent back to the client.
+  _stream(connection, obj, stream, options) {
+    if (!obj.sql) throw new Error('The query is empty');
+
+    options = options || {};
+    const queryOptions = Object.assign({ sql: obj.sql }, obj.options);
+    return new Promise((resolver, rejecter) => {
+      stream.on('error', rejecter);
+      stream.on('end', resolver);
+      const queryStream = connection
+        .query(queryOptions, obj.bindings)
+        .stream(options);
+
+      queryStream.on('error', (err) => {
+        rejecter(err);
+        stream.emit('error', err);
+      });
+
+      queryStream.pipe(stream);
+    });
+  }
+
+  // Runs the query on the specified connection, providing the bindings
+  // and any other necessary prep work.
+  _query(connection, obj) {
+    if (!obj || typeof obj === 'string') obj = { sql: obj };
+    if (!obj.sql) throw new Error('The query is empty');
+
+    return new Promise(function (resolver, rejecter) {
+      if (!obj.sql) {
+        resolver();
+        return;
+      }
+      const queryOptions = Object.assign({ sql: obj.sql }, obj.options);
+      connection.query(
+        queryOptions,
+        obj.bindings,
+        function (err, rows, fields) {
+          if (err) return rejecter(err);
+          obj.response = [rows, fields];
+          resolver(obj);
+        }
+      );
+    });
+  }
+
+  // Process the response as returned from the query.
+  processResponse(obj, runner) {
+    if (obj == null) return;
+    const { response } = obj;
+    const { method } = obj;
+    const rows = response[0];
+    const fields = response[1];
+    if (obj.output) return obj.output.call(runner, rows, fields);
+    switch (method) {
+      case 'select':
+        return rows;
+      case 'first':
+        return rows[0];
+      case 'pluck':
+        return map(rows, obj.pluck);
+      case 'insert':
+        return [rows.insertId];
+      case 'del':
+      case 'update':
+      case 'counter':
+        return rows.affectedRows;
+      default:
+        return response;
+    }
+  }
+
+  async cancelQuery(connectionToKill) {
+    const conn = await this.acquireRawConnection();
+    try {
+      return await this._wrappedCancelQueryCall(conn, connectionToKill);
+    } finally {
+      await this.destroyRawConnection(conn);
+      if (conn.__knex__disposed) {
+        this.logger.warn(`Connection Error: ${conn.__knex__disposed}`);
+      }
+    }
+  }
+
+  _wrappedCancelQueryCall(conn, connectionToKill) {
+    return this._query(conn, {
+      sql: 'KILL QUERY ?',
+      bindings: [connectionToKill.threadId],
+      options: {},
+    });
+  }
+}
+
+Object.assign(Client_MySQL.prototype, {
+  dialect: 'mysql',
+
+  driverName: 'mysql',
+
+  _escapeBinding: makeEscape(),
+
+  canCancelQuery: true,
+});
+
+module.exports = Client_MySQL;