/
oracle-querycompiler.js
342 lines (296 loc) · 9.66 KB
/
oracle-querycompiler.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
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
/* eslint max-len:0 */
// Oracle Query Builder & Compiler
// ------
const compact = require('lodash/compact');
const identity = require('lodash/identity');
const isEmpty = require('lodash/isEmpty');
const isPlainObject = require('lodash/isPlainObject');
const reduce = require('lodash/reduce');
const QueryCompiler = require('../../../query/querycompiler');
const { ReturningHelper } = require('../utils');
const { isString } = require('../../../util/is');
const components = [
'columns',
'join',
'where',
'union',
'group',
'having',
'order',
'lock',
];
// 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.
class QueryCompiler_Oracle extends QueryCompiler {
constructor(client, builder, formatter) {
super(client, builder, formatter);
const { onConflict } = this.single;
if (onConflict) {
throw new Error('.onConflict() is not supported for oracledb.');
}
// Compiles the `select` statement, or nested sub-selects
// by calling each of the component compilers, trimming out
// the empties, and returning a generated query string.
this.first = this.select;
}
// Compiles an "insert" query, allowing for multiple
// inserts using a single query statement.
insert() {
let insertValues = this.single.insert || [];
let { returning } = this.single;
if (!Array.isArray(insertValues) && isPlainObject(this.single.insert)) {
insertValues = [this.single.insert];
}
// always wrap returning argument in array
if (returning && !Array.isArray(returning)) {
returning = [returning];
}
if (
Array.isArray(insertValues) &&
insertValues.length === 1 &&
isEmpty(insertValues[0])
) {
return this._addReturningToSqlAndConvert(
`insert into ${this.tableName} (${this.formatter.wrap(
this.single.returning
)}) values (default)`,
returning,
this.tableName
);
}
if (
isEmpty(this.single.insert) &&
typeof this.single.insert !== 'function'
) {
return '';
}
const insertData = this._prepInsert(insertValues);
const sql = {};
if (isString(insertData)) {
return this._addReturningToSqlAndConvert(
`insert into ${this.tableName} ${insertData}`,
returning
);
}
if (insertData.values.length === 1) {
return this._addReturningToSqlAndConvert(
`insert into ${this.tableName} (${this.formatter.columnize(
insertData.columns
)}) values (${this.client.parameterize(
insertData.values[0],
undefined,
this.builder,
this.bindingsHolder
)})`,
returning,
this.tableName
);
}
const insertDefaultsOnly = insertData.columns.length === 0;
sql.sql =
'begin ' +
insertData.values
.map((value) => {
let returningHelper;
const parameterizedValues = !insertDefaultsOnly
? this.client.parameterize(
value,
this.client.valueForUndefined,
this.builder,
this.bindingsHolder
)
: '';
const returningValues = Array.isArray(returning)
? returning
: [returning];
let subSql = `insert into ${this.tableName} `;
if (returning) {
returningHelper = new ReturningHelper(returningValues.join(':'));
sql.outParams = (sql.outParams || []).concat(returningHelper);
}
if (insertDefaultsOnly) {
// no columns given so only the default value
subSql += `(${this.formatter.wrap(
this.single.returning
)}) values (default)`;
} else {
subSql += `(${this.formatter.columnize(
insertData.columns
)}) values (${parameterizedValues})`;
}
subSql += returning
? ` returning ROWID into ${this.client.parameter(
returningHelper,
this.builder,
this.bindingsHolder
)}`
: '';
// pre bind position because subSql is an execute immediate parameter
// later position binding will only convert the ? params
subSql = this.formatter.client.positionBindings(subSql);
const parameterizedValuesWithoutDefault = parameterizedValues
.replace('DEFAULT, ', '')
.replace(', DEFAULT', '');
return (
`execute immediate '${subSql.replace(/'/g, "''")}` +
(parameterizedValuesWithoutDefault || returning ? "' using " : '') +
parameterizedValuesWithoutDefault +
(parameterizedValuesWithoutDefault && returning ? ', ' : '') +
(returning ? 'out ?' : '') +
';'
);
})
.join(' ') +
'end;';
if (returning) {
sql.returning = returning;
// generate select statement with special order by to keep the order because 'in (..)' may change the order
sql.returningSql =
`select ${this.formatter.columnize(returning)}` +
' from ' +
this.tableName +
' where ROWID in (' +
sql.outParams.map((v, i) => `:${i + 1}`).join(', ') +
')' +
' order by case ROWID ' +
sql.outParams
.map((v, i) => `when CHARTOROWID(:${i + 1}) then ${i}`)
.join(' ') +
' end';
}
return sql;
}
// Update method, including joins, wheres, order & limits.
update() {
const updates = this._prepUpdate(this.single.update);
const where = this.where();
let { returning } = this.single;
const sql =
`update ${this.tableName}` +
' set ' +
updates.join(', ') +
(where ? ` ${where}` : '');
if (!returning) {
return sql;
}
// always wrap returning argument in array
if (!Array.isArray(returning)) {
returning = [returning];
}
return this._addReturningToSqlAndConvert(sql, returning, this.tableName);
}
// Compiles a `truncate` query.
truncate() {
return `truncate table ${this.tableName}`;
}
forUpdate() {
return 'for update';
}
forShare() {
// lock for share is not directly supported by oracle
// use LOCK TABLE .. IN SHARE MODE; instead
this.client.logger.warn(
'lock for share is not supported by oracle dialect'
);
return '';
}
// Compiles a `columnInfo` query.
columnInfo() {
const column = this.single.columnInfo;
// The user may have specified a custom wrapIdentifier function in the config. We
// need to run the identifiers through that function, but not format them as
// identifiers otherwise.
const table = this.client.customWrapIdentifier(this.single.table, identity);
// Node oracle drivers doesn't support LONG type (which is data_default type)
const sql = `select * from xmltable( '/ROWSET/ROW'
passing dbms_xmlgen.getXMLType('
select char_col_decl_length, column_name, data_type, data_default, nullable
from all_tab_columns where table_name = ''${table}'' ')
columns
CHAR_COL_DECL_LENGTH number, COLUMN_NAME varchar2(200), DATA_TYPE varchar2(106),
DATA_DEFAULT clob, NULLABLE varchar2(1))`;
return {
sql: sql,
output(resp) {
const out = reduce(
resp,
function (columns, val) {
columns[val.COLUMN_NAME] = {
type: val.DATA_TYPE,
defaultValue: val.DATA_DEFAULT,
maxLength: val.CHAR_COL_DECL_LENGTH,
nullable: val.NULLABLE === 'Y',
};
return columns;
},
{}
);
return (column && out[column]) || out;
},
};
}
select() {
let query = this.with();
const statements = components.map((component) => {
return this[component]();
});
query += compact(statements).join(' ');
return this._surroundQueryWithLimitAndOffset(query);
}
aggregate(stmt) {
return this._aggregate(stmt, { aliasSeparator: ' ' });
}
// for single commands only
_addReturningToSqlAndConvert(sql, returning, tableName) {
const res = {
sql,
};
if (!returning) {
return res;
}
const returningValues = Array.isArray(returning) ? returning : [returning];
const returningHelper = new ReturningHelper(returningValues.join(':'));
res.sql =
sql +
' returning ROWID into ' +
this.client.parameter(returningHelper, this.builder, this.bindingsHolder);
res.returningSql = `select ${this.formatter.columnize(
returning
)} from ${tableName} where ROWID = :1`;
res.outParams = [returningHelper];
res.returning = returning;
return res;
}
_surroundQueryWithLimitAndOffset(query) {
let { limit } = this.single;
const { offset } = this.single;
const hasLimit = limit || limit === 0 || limit === '0';
limit = +limit;
if (!hasLimit && !offset) return query;
query = query || '';
if (hasLimit && !offset) {
return `select * from (${query}) where rownum <= ${this._getValueOrParameterFromAttribute(
'limit',
limit
)}`;
}
const endRow = +offset + (hasLimit ? limit : 10000000000000);
return (
'select * from ' +
'(select row_.*, ROWNUM rownum_ from (' +
query +
') row_ ' +
'where rownum <= ' +
(this.single.skipBinding['offset']
? endRow
: this.client.parameter(endRow, this.builder, this.bindingsHolder)) +
') ' +
'where rownum_ > ' +
this._getValueOrParameterFromAttribute('offset', offset)
);
}
}
module.exports = QueryCompiler_Oracle;