lib/dialects/mysql/query

MySQL Query Builder & Compiler

module.exports = function(client) { var _ = require('lodash'); var inherits = require('inherits'); var QueryBuilder = require('../../query/builder'); var QueryCompiler = require('../../query/compiler');

Query Builder

Extend the QueryBuilder base class to include the "Formatter" which has been defined on the client, as well as the

function QueryBuilder_MySQL() { this.client = client; QueryBuilder.apply(this, arguments); } inherits(QueryBuilder_MySQL, QueryBuilder);

Query Compiler

Set the "Formatter" to use for the queries, ensuring that all parameterized values (even across sub-queries) are properly built into the same query.

function QueryCompiler_MySQL() { this.formatter = new client.Formatter(); QueryCompiler.apply(this, arguments); } inherits(QueryCompiler_MySQL, QueryCompiler); QueryCompiler_MySQL.prototype._emptyInsertValue = '() values ()';

Update method, including joins, wheres, order & limits.

QueryCompiler_MySQL.prototype.update = function() { var join = this.join(); var updates = this._prepUpdate(this.single.update); var where = this.where(); var order = this.order(); var limit = this.limit(); return 'update ' + this.tableName + (join ? ' ' + join : '') + ' set ' + updates.join(', ') + (where ? ' ' + where : '') + (order ? ' ' + order : '') + (limit ? ' ' + limit : ''); }; QueryCompiler_MySQL.prototype.forUpdate = function() { return 'for update'; }; QueryCompiler_MySQL.prototype.forShare = function() { return 'lock in share mode'; };

Compiles a columnInfo query.

QueryCompiler_MySQL.prototype.columnInfo = function() { return { sql: 'select * from information_schema.columns where table_name = ? and table_schema = ?', bindings: [this.single.table, client.database()], output: function(resp) { return _.reduce(resp, function(columns, val) { columns[val.COLUMN_NAME] = { defaultValue: val.COLUMN_DEFAULT, type: val.DATA_TYPE, maxLength: val.CHARACTER_MAXIMUM_LENGTH, nullable: (val.IS_NULLABLE === 'YES') }; return columns; }, {}); } }; };

Set the QueryBuilder & QueryCompiler on the client object, incase anyone wants to modify things to suit their own purposes.

client.QueryBuilder = QueryBuilder_MySQL; client.QueryCompiler = QueryCompiler_MySQL; };