-
Notifications
You must be signed in to change notification settings - Fork 2.1k
/
index.js
196 lines (172 loc) · 5.49 KB
/
index.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
// Oracle Client
// -------
const { map, flatten, values } = require('lodash');
const inherits = require('inherits');
const Client = require('../../client');
const Bluebird = require('bluebird');
const { bufferToString } = require('../../query/string');
const Formatter = require('./formatter');
const Transaction = require('./transaction');
const QueryCompiler = require('./query/compiler');
const SchemaCompiler = require('./schema/compiler');
const ColumnBuilder = require('./schema/columnbuilder');
const ColumnCompiler = require('./schema/columncompiler');
const TableCompiler = require('./schema/tablecompiler');
const { ReturningHelper, isConnectionError } = require('./utils');
// Always initialize with the "QueryBuilder" and "QueryCompiler"
// objects, which extend the base 'lib/query/builder' and
// 'lib/query/compiler', respectively.
function Client_Oracle(config) {
Client.call(this, config);
}
inherits(Client_Oracle, Client);
Object.assign(Client_Oracle.prototype, {
dialect: 'oracle',
driverName: 'oracle',
_driver() {
return require('oracle');
},
transaction() {
return new Transaction(this, ...arguments);
},
formatter() {
return new Formatter(this, ...arguments);
},
queryCompiler() {
return new QueryCompiler(this, ...arguments);
},
schemaCompiler() {
return new SchemaCompiler(this, ...arguments);
},
columnBuilder() {
return new ColumnBuilder(this, ...arguments);
},
columnCompiler() {
return new ColumnCompiler(this, ...arguments);
},
tableCompiler() {
return new TableCompiler(this, ...arguments);
},
prepBindings(bindings) {
return map(bindings, (value) => {
// returning helper uses always ROWID as string
if (value instanceof ReturningHelper && this.driver) {
return new this.driver.OutParam(this.driver.OCCISTRING);
} else if (typeof value === 'boolean') {
return value ? 1 : 0;
} else if (Buffer.isBuffer(value)) {
return bufferToString(value);
}
return value;
});
},
// Get a raw connection, called by the `pool` whenever a new
// connection needs to be added to the pool.
acquireRawConnection() {
const client = this;
return new Bluebird(async (resolver, rejecter) => {
const connectionSettings = await client
.connectionConfigProvider()
.resolveConnectionConfig();
this.driver.connect(connectionSettings, (err, connection) => {
if (err) return rejecter(err);
Bluebird.promisifyAll(connection);
if (connectionSettings.prefetchRowCount) {
connection.setPrefetchRowCount(connectionSettings.prefetchRowCount);
}
resolver(connection);
});
});
},
// Used to explicitly close a connection, called internally by the pool
// when a connection times out or the pool is shutdown.
destroyRawConnection(connection) {
return Bluebird.fromCallback(connection.close.bind(connection));
},
// Return the database for the Oracle client.
database() {
return this.connectionSettings.database;
},
// Position the bindings for the query.
positionBindings(sql) {
let questionCount = 0;
return sql.replace(/\?/g, function() {
questionCount += 1;
return `:${questionCount}`;
});
},
_stream(connection, obj, stream, options) {
return new Bluebird(function(resolver, rejecter) {
stream.on('error', (err) => {
if (isConnectionError(err)) {
connection.__knex__disposed = err;
}
rejecter(err);
});
stream.on('end', resolver);
const queryStream = connection.queryStream(
obj.sql,
obj.bindings,
options
);
queryStream.pipe(stream);
queryStream.on('error', function(error) {
rejecter(error);
stream.emit('error', error);
});
});
},
// Runs the query on the specified connection, providing the bindings
// and any other necessary prep work.
_query(connection, obj) {
if (!obj.sql) throw new Error('The query is empty');
return connection
.executeAsync(obj.sql, obj.bindings)
.then(function(response) {
if (!obj.returning) return response;
const rowIds = obj.outParams.map(
(v, i) => response[`returnParam${i ? i : ''}`]
);
return connection.executeAsync(obj.returningSql, rowIds);
})
.then(function(response) {
obj.response = response;
obj.rowsAffected = response.updateCount;
return obj;
})
.catch((err) => {
if (isConnectionError(err)) {
connection.__knex__disposed = err;
}
throw err;
});
},
// Process the response as returned from the query.
processResponse(obj, runner) {
let { response } = obj;
const { method } = obj;
if (obj.output) return obj.output.call(runner, response);
switch (method) {
case 'select':
case 'pluck':
case 'first':
if (obj.method === 'pluck') response = map(response, obj.pluck);
return obj.method === 'first' ? response[0] : response;
case 'insert':
case 'del':
case 'update':
case 'counter':
if (obj.returning) {
if (obj.returning.length > 1 || obj.returning[0] === '*') {
return response;
}
// return an array with values if only one returning value was specified
return flatten(map(response, values));
}
return obj.rowsAffected;
default:
return response;
}
},
});
module.exports = Client_Oracle;