Information technology — Database languages — SQL — Part 9: Management of External Data (SQL/MED)

Technologies de l'information — Langages de base de données — SQL — Partie 9: Gestion des données externes (SQL/MED)

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06-Jun-2001
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ISO/IEC 9075-9:2001 - Information technology -- Database languages -- SQL
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INTERNATIONAL ISO/IEC
STANDARD 9075-9
First edition
2001-05-15
Information technology — Database
languages — SQL —
Part 9:
Management of External Data (SQL/MED)
Technologies de l'information — Langages de base de données — SQL —
Partie 9: Gestion des données externes (SQL/MED)
Reference number
ISO/IEC 9075-9:2001(E)
©
ISO/IEC 2001

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ISO/IEC 9075-9:2001(E)
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ii © ISO/IEC 2001 – All rights reserved

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ISO/IEC 9075-9:2001 (E)
Contents Page
Foreword . . xiv
Introduction . . . . . . . . xv
1 Scope . 1
2 Normative references. 3
2.1 ISO/IEC JTC 1 standards . . . . 3
2.2 Publicly-available specifications . 4
3 Definitions, notations, and conventions . 5
3.1 Definitions . 5
3.1.1 Definitions provided in Part 9 . 5
3.1.2 Definitions taken from XML . . 6
3.2 Notations . 6
3.3 Conventions . 6
3.3.1 Relationships to other parts of ISO/IEC 9075 . 6
3.3.1.1 Clause, Subclause, and Table relationships . . . 6
3.4 Object identifier for Database Language SQL . 22
4 Concepts. 27
4.1 SQL-environments and their components . 27
4.1.1 SQL-environments . 27
4.1.2 User mapping concepts . 27
4.1.3 Catalogs and schemas . 27
4.1.3.1 Catalogs . 27
4.1.4 Foreign servers and descriptors . 27
4.1.5 Foreign-data wrappers and descriptors . . 28
4.2 Data types . 28
4.3 Foreign servers . . . 28
4.4 Foreign-data wrappers . 29
4.5 User mappings . . . . 30
4.6 Generic options . . . 30
4.7 Capabilities and options information . . . . 31
4.8 Datalinks . 31
4.8.1 Operations involving datalinks . 34
4.8.1.1 Operators that operate on datalinks . 34
© ISO/IEC 2001 – All rights reserved Contents iii

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ISO/IEC 9075-9:2001 (E)
4.8.1.2 Other operators involving datalinks. 35
4.9 Type conversion and mixing of data types . 35
4.10 Columns, fields, and attributes . 35
4.11 Tables . . . 35
4.11.1 Types of tables . . . . 36
4.12 Functional dependencies . 36
4.12.1 Known functional dependencies in a foreign table . . 36
4.13 SQL-schemas . 36
4.14 SQL-statements . . . 36
4.14.1 SQL-statements classified by function . . . 36
4.15 SQL-sessions . 37
4.16 Privileges . 38
4.17 SQL-transactions . . 38
4.18 Foreign-data wrapper interface . 38
4.18.1 Handles . 39
4.18.2 Foreign server sessions . 40
4.18.3 Foreign-data wrapper interface routines . 40
4.18.3.1 Handle routines . 41
4.18.3.2 Initialization routines . . . 43
4.18.3.3 Access routines . 44
4.18.3.4 Termination routines . . . . 44
4.18.3.5 Decomposition and pass-through modes. 45
4.18.3.6 Sequence of actions during the execution of requests involving foreign tables and
foreign servers . 45
4.18.4 Return codes . 57
4.18.5 Foreign-data wrapper diagnostics areas . . 58
4.18.6 Null pointers . 59
4.18.7 Foreign-data wrapper descriptor areas . . 60
4.19 Introduction to SQL/CLI . 63
5 Lexical elements . 65
5.1 and . 65
5.2 Names and identifiers . 67
6 Scalar expressions . 69
6.1 . 69
6.2 . 72
6.3 . . . 73
6.4 . 74
6.5 . . . . 77
6.6 . 79
6.7 . 81
6.8 . . 82
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ISO/IEC 9075-9:2001 (E)
7 Query expressions . 83
7.1 . . 83
7.2 . . . . 89
7.3 . 90
7.4 . 91
7.5 . 92
8 Predicates . 93
8.1 . 93
9 URLs. 95
9.1 URL format . 95
10 Data assignment rules and routine determination . 99
10.1 Retrieval assignment . 99
10.2 Store assignment . . 100
10.3 Data types of results of aggregations . . . . 101
10.4 Type precedence list determination . 102
10.5 Determination of identical values . 103
11 Additional common elements . 105
11.1 . 105
11.2 . . 106
11.3 . 107
12 Schema definition and manipulation. 109
12.1 . 109
12.2 . . . . 110
12.3

. . 111
12.4 . 112
12.5 . 113
12.6 . 114
12.7 . 115
12.8 . 116
12.9 . 117
12.10 . 118
12.11 . 119
12.12 . 120
12.13 . 123
12.14 . 125
12.15 . 127
12.16 . 128
12.17 . 130
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ISO/IEC 9075-9:2001 (E)
13 Catalog manipulation. 133
13.1 . . . . 133
13.2 . 135
13.3 . 136
13.4 . 137
13.5 . 139
13.6 . . 140
13.7 . 141
14 Access control . 143
14.1 . 143
14.2 . . . . 144
14.3 . 146
14.4 . 147
15 SQL-client modules . 149
15.1 . 149
15.2 . 150
15.3 Calls to an . 151
15.4 . . 153
15.5 Data type correspondences . . . . 154
16 Data manipulation . 157
16.1 . . . 157
16.2 Effect of deleting rows from base tables . . 158
16.3 Effect of inserting tables into base tables. 159
16.4 Effect of replacing rows in base tables . . . 160
17 Session management . 163
17.1 . . 163
18 Dynamic SQL. 165
18.1 Description of SQL descriptor areas. 165
18.2 . 166
18.3 . 168
18.4 . 169
18.5 . 171
18.6 . 175
18.7 . 178
18.8 . . . . 179
18.9 . . . 180
18.10 . . . 181
18.11 . . . 182
18.12 . . . 183
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ISO/IEC 9075-9:2001 (E)
19 Embedded SQL . 185
19.1 . 185
19.2 . . 186
19.3 . 187
19.4 . 188
19.5 . . . . 189
19.6 . 190
19.7 . 191
20 Call-Level Interface specifications . 193
20.1 . . . . 193
20.2 Implicit DESCRIBE USING clause . 193
20.2.1 CLI-specific status codes . 194
20.2.2 Description of CLI item descriptor areas . 194
20.2.3 Other tables associated with CLI. 195
20.3 SQL/CLI data type correspondences. 197
21 SQL/CLI routines . 199
21.1 BuildDataLink . . . . 199
21.2 GetDataLinkAttr . . 200
21.3 GetInfo . . 202
22 SQL/MED common specifications . 203
22.1 Description of foreign-data wrapper item descriptor areas . . . . 203
22.2 Implicit cursor . . . . 207
22.3 Implicit DESCRIBE INPUT USING clause . 209
22.4 Implicit DESCRIBE OUTPUT USING clause . 212
22.5 Implicit EXECUTE USING and OPEN USING clauses. 216
22.6 Implicit FETCH USING clause . 219
22.7 Character string retrieval . . . . 223
22.8 Binary large object string retrieval . 224
22.9 Tables used with SQL/MED . . . 225
23 Foreign-data wrapper interface routines . 235
23.1 . 235
23.2 invocation . 239
23.3 Foreign-data wrapper interface wrapper routines . . 241
23.3.1 AllocWrapperEnv . . 241
23.3.2 Close . . . 243
23.3.3 ConnectServer . . . . 244
23.3.4 FreeExecutionHandle. 246
23.3.5 FreeFSConnection . 248
23.3.6 FreeReplyHandle . . 249
23.3.7 FreeWrapperEnv . . 250
23.3.8 GetNumReplySelectElems . . . . 251
23.3.9 GetNumReplyTableRefs . 252
23.3.10 GetOpts . 253
© ISO/IEC 2001 – All rights reserved Contents vii

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ISO/IEC 9075-9:2001 (E)
23.3.11 GetReplySelectElem. 255
23.3.12 GetReplyTableRef . 256
23.3.13 GetSPDHandle . . . . 257
23.3.14 GetSRDHandle . . . . 258
23.3.15 GetStatistics . 259
23.3.16 GetWPDHandle . . . 261
23.3.17 GetWRDHandle . . . 262
23.3.18 InitRequest . 263
23.3.19 Iterate . . 267
23.3.20 Open . . . 269
23.3.21 ReOpen . 273
23.3.22 TransmitRequest . . 274
23.4 Foreign-data wrapper interface SQL-server routines . 277
23.4.1 AllocDescriptor . . . . 277
23.4.2 FreeDescriptor . . . . 278
23.4.3 GetAuthorizationId . 279
23.4.4 GetDescriptor. 280
23.4.5 GetNumSelectElems . 282
23.4.6 GetNumServerOpts . 283
23.4.7 GetNumTableColOpts . 284
23.4.8 GetNumTableOpts . 286
23.4.9 GetNumTableRefElems . 287
23.4.10 GetNumUserOpts . 288
23.4.11 GetNumWrapperOpts . 289
23.4.12 GetSelectElem . . . . 290
23.4.13 GetSelectElemType . 291
23.4.14 GetServerName . . . 292
23.4.15 GetServerOpt. 293
23.4.16 GetServerOptByName . 295
23.4.17 GetServerType . . . . 297
23.4.18 GetServerVersion . . 298
23.4.19 GetSQLString . . . . 299
23.4.20 GetTableColOpt . . . 300
23.4.21 GetTableColOptByName . 302
23.4.22 GetTableOpt. 304
23.4.23 GetTableOptByName . 306
23.4.24 GetTableRefElem . . 308
23.4.25 GetTableRefElemType . 309
23.4.26 GetTableRefTableName . 310
23.4.27 GetTableServerName . 310
23.4.28 GetTRDHandle . . . 312
23.4.29 GetUserOpt . 313
23.4.30 GetUserOptByName . 315
23.4.31 GetValExprColName . 317
23.4.32 GetWrapperLibraryName. 318
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ISO/IEC 9075-9:2001 (E)
23.4.33 GetWrapperName . 319
23.4.34 GetWrapperOpt . . . 320
23.4.35 GetWrapperOptByName . 322
23.4.36 SetDescriptor . 324
23.5 Foreign-data wrapper interface general routines . . . 329
23.5.1 GetDiagnostics . . . . 329
24 Diagnostics management. 333
24.1 . . . 333
25 Information Schema. 335
25.1 ATTRIBUTES view . 335
25.2 COLUMN_OPTIONS view . . . . 337
25.3 COLUMNS view . . 338
25.4 FOREIGN_DATA_WRAPPER_OPTIONS view. 341
25.5 FOREIGN_DATA_WRAPPERS view . . . . 342
25.6 FOREIGN_SERVER_OPTIONS view . . . . 343
25.7 FOREIGN_SERVERS view . . . 344
25.8 FOREIGN_TABLE_OPTIONS view . 345
25.9 FOREIGN_TABLES view. 346
25.10 USER_MAP_OPTIONS view . . 347
25.11 USER_MAPPINGS view . 348
25.12 Short name views . . 349
26 Definition Schema . 353
26.1 COLUMN_OPTIONS base table . 353
26.2 DATA_TYPE_DESCRIPTOR base table . . 354
26.3 FOREIGN_DATA_WRAPPER_OPTIONS base table . 361
26.4 FOREIGN_DATA_WRAPPERS base table . 362
26.5 FOREIGN_SERVER_OPTIONS base table . 363
26.6 FOREIGN_SERVERS base table . 364
26.7 FOREIGN_TABLE_OPTIONS base table. 365
26.8 FOREIGN_TABLES base table . 366
26.9 SQL_SIZING base table. 367
26.10 TABLES base table . 368
26.11 USAGE_PRIVILEGES base table . 369
26.12 USER_MAPPING_OPTIONS base table . 370
26.13 USER_MAPPINGS base table . 371
27 Status codes. 373
27.1 SQLSTATE. 373
28 Conformance . 375
28.1 SQL-server conformance to SQL/MED . . . 375
28.2 Foreign-data-wrapper conformance to SQL/MED . . . 376
28.3 Claims of conformance by SQL-servers . . 376
28.4 Claims of conformance by foreign-data wrappers . . . 377
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ISO/IEC 9075-9:2001 (E)
28.5 Extensions and options . 377
Annex A SQL Conformance Summary . 379
Annex B Implementation-defined elements . 385
Annex C Implementation-dependent elements . 393
Annex D Deprecated features . 397
Annex E Incompatibilities with ISO/IEC 9075:1992 . 399
Annex F Typical header files . 401
F.1 C Header File SQLCLI.H. 401
F.2 COBOL Library Item SQLCLI . 402
Annex G SQL feature and package taxonomy. 403
Annex H SQL/MED model. 405
Index . 411
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ISO/IEC 9075-9:2001 (E)
FIGURES
Figure Page
1 SQL/MED interfaces . 405
2 SQL/MED information flow . . . 407
© ISO/IEC 2001 – All rights reserved Contents xi

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ISO/IEC 9075-9:2001 (E)
TABLES
Tables Page
1 Clause, Subclause, and Table relationships . 6
2 Valid datalink file control options . 34
3 Sequence of actions during foreign server request executions . 46
4 Fields used in foreign-data wrapper diagnostics areas. 59
5 Fields in foreign-data wrapper descriptor areas . . . . 61
6 Data type correspondences for Ada . 154
7 Data type correspondences for C . 154
8 Data type correspondences for COBOL . . 154
9 Data type correspondences for Fortran . . 155
10 Data type correspondences for MUMPS . . 155
11 Data type correspondences for Pascal . . . 155
12 Data type correspondences for PL/I . 155
13 Codes used for SQL data types in Dynamic SQL . . . 165
14 Abbreviated SQL/CLI generic names . . . . 193
15 SQLSTATE class and subclass values for SQL/CLI-specific conditions . . . . 194
16 Codes used for implementation data types in SQL/CLI . 194
17 Codes used for application data types in SQL/CLI . . 195
18 Codes used to identify SQL/CLI routines . 195
19 Codes and data types for implementation information. 195
20 Codes used for datalink attributes . 195
21 Data types of attributes . 196
22 SQL/CLI data type correspondences for Ada . 197
23 SQL/CLI data type correspondences for C . 197
24 SQL/CLI data type correspondences for COBOL . . .
...

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