query.js
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var Utils = require("../../utils")
, AbstractQuery = require('../abstract/query')
module.exports = (function() {
var Query = function(client, sequelize, callee, options) {
this.client = client
this.callee = callee
this.sequelize = sequelize
this.options = Utils._.extend({
logging: console.log,
plain: false,
raw: false
}, options || {})
this.checkLoggingOption()
}
Utils.inherit(Query, AbstractQuery)
Query.prototype.run = function(sql) {
this.sql = sql
if (this.options.logging !== false) {
this.options.logging('Executing (' + this.options.uuid + '): ' + this.sql)
}
var resultSet = [],
errorDetected = false,
alreadyEnded = false, // This is needed because CALL queries emit 'end' twice...
self = this
this.client.query(this.sql)
.on('result', function(results) {
results
.on('row', function(row, metadata) {
for (var prop in row) {
if (row.hasOwnProperty(prop)) {
if (row[prop] === null) {
continue
}
type = metadata.types[prop]
switch (type) {
case "TINYINT":
case "SMALLINT":
case "INTEGER":
case "MEDIUMINT":
case "BIGINT":
case "YEAR":
row[prop] = parseInt(row[prop], 10)
break
case "DECIMAL":
case "FLOAT":
case "DOUBLE":
row[prop] = parseFloat(row[prop])
break
case "DATE":
case "TIMESTAMP":
case "DATETIME":
row[prop] = new Date(row[prop] + 'Z')
break
case "BIT":
case "BLOB":
case "TINYBLOB":
case "MEDIUMBLOB":
case "LONGBLOB":
if (metadata.charsetNrs[prop] === 63) { // binary
row[prop] = new Buffer(row[prop])
}
break
case "TIME":
case "CHAR":
case "VARCHAR":
case "SET":
case "ENUM":
case "GEOMETRY":
case "NULL":
break
default:
// blank
}
}
}
resultSet.push(row)
})
.on('error', function(err) {
errorDetected = true
self.emit('sql', self.sql)
self.emit('error', err, self.callee)
})
.on('end', function(info) {
if (alreadyEnded || errorDetected) {
return
}
alreadyEnded = true
self.emit('sql', self.sql)
// we need to figure out whether to send the result set
// or info depending upon the type of query
if (/^call/.test(self.sql.toLowerCase())) {
self.emit('success', resultSet)
} else if( /^show/.test(self.sql.toLowerCase()) ||
/^select/.test(self.sql.toLowerCase()) ||
/^describe/.test(self.sql.toLowerCase())) {
self.emit('success', self.formatResults(resultSet))
} else {
self.emit('success', self.formatResults(info))
}
})
})
.on('error', function(err) {
if (errorDetected) {
return
}
errorDetected = true
self.emit('sql', self.sql)
self.emit('error', err, self.callee)
})
.setMaxListeners(100)
return this
}
return Query
})()