Field attribute combinations: Difference between revisions
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<p>When deciding on combinations of field attributes, use the following chart to see if the combination you want to use is valid. <br /> | <p>When deciding on combinations of field attributes, use the following chart to see if the combination you want to use is valid. <br /> | ||
The [[#Key to chart codes|chart key]] explains the codes used in the chart. </p> | The [[#Key to chart codes|chart key]] explains the codes used in the chart. </p> | ||
< | <p class="caption">Field attribute combinations</p> | ||
<table style="font-size:80%"> | |||
<tr class="head"> | <tr class="head"> | ||
<th>Attribute</th> | <th>Attribute</th> | ||
| Line 27: | Line 27: | ||
<th>BLOB</th> | <th>BLOB</th> | ||
<th>CLOB</th> | <th>CLOB</th> | ||
<th>MINLOBE</th> | |||
<th>CHUNK</th> | |||
<th>UTF8</th> | |||
<th>UTF16</th> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>KEY</td> | <td>KEY</td> | ||
| Line 51: | Line 56: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>ORD CHAR </td> | <td>ORD CHAR </td> | ||
| Line 66: | Line 76: | ||
<td> </td> | <td> </td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | <td> </td> | ||
<td> </td> | <td> </td> | ||
| Line 76: | Line 90: | ||
<td>N</td> | <td>N</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>ORD NUM </td> | <td>ORD NUM </td> | ||
| Line 99: | Line 114: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>FRV</td> | <td>FRV</td> | ||
| Line 123: | Line 143: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>UNIQUE (UNQ)</td> | <td>UNIQUE (UNQ)</td> | ||
| Line 147: | Line 172: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>NUM RANGE (NR)</td> | <td>NUM RANGE (NR)</td> | ||
| Line 171: | Line 201: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>DEFERRABLE (DEF)</td> | <td>DEFERRABLE (DEF)</td> | ||
| Line 195: | Line 230: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>(LVL)</td> | <td>(LVL)</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | <td> </td> | ||
<td> </td> | <td> </td> | ||
| Line 220: | Line 264: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>AT-MOST-ONE (ONE)</td> | <td>AT-MOST-ONE (ONE)</td> | ||
| Line 232: | Line 277: | ||
<td> </td> | <td> </td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | <td> </td> | ||
<td> </td> | <td> </td> | ||
| Line 244: | Line 293: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>INVISIBLE (INV)</td> | <td>INVISIBLE (INV)</td> | ||
| Line 267: | Line 317: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>STRING (STR)</td> | <td>STRING (STR)</td> | ||
| Line 291: | Line 346: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>FLOAT (FLT)</td> | <td>FLOAT (FLT)</td> | ||
| Line 315: | Line 375: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>BINARY (BIN)</td> | <td>BINARY (BIN)</td> | ||
| Line 339: | Line 404: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>CODED (COD)</td> | <td>CODED (COD)</td> | ||
| Line 363: | Line 433: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>FEW VALUED (FV)</td> | <td>FEW VALUED (FV)</td> | ||
| Line 387: | Line 462: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>OCCURS (OCC)</td> | <td>OCCURS (OCC)</td> | ||
| Line 407: | Line 487: | ||
<td> </td> | <td> </td> | ||
<td>@</td> | <td>@</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | <td> </td> | ||
<td> </td> | <td> </td> | ||
| Line 412: | Line 496: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>LENGTH (LEN)</td> | <td>LENGTH (LEN)</td> | ||
| Line 435: | Line 520: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>PAD</td> | <td>PAD</td> | ||
| Line 459: | Line 549: | ||
<td>N</td> | <td>N</td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>UPDATE (UPD)</td> | <td>UPDATE (UPD)</td> | ||
| Line 472: | Line 567: | ||
<td> </td> | <td> </td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | <td> </td> | ||
<td> </td> | <td> </td> | ||
| Line 484: | Line 583: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>BINARY_LARGE_OBJECT (BLOB)</td> | <td>BINARY_LARGE_OBJECT (BLOB)</td> | ||
| Line 507: | Line 607: | ||
<td> </td> | <td> </td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>CHARACTER_LARGE_OBJECT (CLOB)</td> | <td>CHARACTER_LARGE_OBJECT (CLOB)</td> | ||
| Line 530: | Line 635: | ||
<td> </td> | <td> </td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | |||
<tr> | |||
<td>MINLOBE (MINLOBE)</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td> </td> | |||
<td> </td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td> </td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td> </td> | |||
<td>N</td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | |||
<tr> | |||
<td>CHUNK (CHUNK)</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td> </td> | |||
<td> </td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td> </td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td> </td> | |||
<td>N</td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | |||
<tr> | |||
<td>UTF8 (UTF-8)</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td> </td> | |||
<td> </td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td> </td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td> </td> | |||
<td>N</td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
</tr> | |||
<tr> | |||
<td>UTF16 (UTF-16)</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td> </td> | |||
<td> </td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td> </td> | |||
<td>N</td> | |||
<td>N</td> | |||
<td> </td> | |||
<td>N</td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
</table> | </table> | ||
====Key to chart codes==== | ====Key to chart codes==== | ||
<table> | <table> | ||
| Line 539: | Line 765: | ||
<th>Meaning</th> | <th>Meaning</th> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>N </td> | <td>N </td> | ||
<td>This attribute combination is not valid.</td> | <td>This attribute combination is not valid.</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>R </td> | <td>R </td> | ||
| Line 551: | Line 779: | ||
<td>One of these attributes is required. You can choose any one of the attributes marked, but you must choose at least one.</td> | <td>One of these attributes is required. You can choose any one of the attributes marked, but you must choose at least one.</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>=1</td> | <td>=1</td> | ||
<td>The OCCURS clause is valid with this attribute only if defined as OCCURS=1. You cannot enter multiple field values for fields with these attributes.</td> | <td>The OCCURS clause is valid with this attribute only if defined as OCCURS=1. You cannot enter multiple field values for fields with these attributes.</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>F </td> | <td>F </td> | ||
| Line 560: | Line 790: | ||
</tr> | </tr> | ||
</table> | </table> | ||
<p>Some of the invalid combinations are direct conflicts, such as UNIQUE and DEFERRABLE; others describe meaningless situations or unusable fields, such as ORDERED CHARACTER and ORDERED NUMERIC. </p> | <p> | ||
<p>In addition, some attributes <var class="term">require</var> other attributes. FLOAT, for example, requires a LENGTH specification. </p> | Some of the invalid combinations are direct conflicts, such as UNIQUE and DEFERRABLE; others describe meaningless situations or unusable fields, such as ORDERED CHARACTER and ORDERED NUMERIC. </p> | ||
<p>Field descriptions that contain invalid combinations are rejected. </p> | <p> | ||
<p>The | In addition, some attributes <var class="term">require</var> other attributes. FLOAT, for example, requires a LENGTH specification. </p> | ||
<p> | |||
Field descriptions that contain invalid combinations are rejected. </p> | |||
<p> | |||
The "Field attribute combinations" chart is for Entry Order files. More stringent restrictions are placed on fields that are used as sort keys, hash keys, or record security fields. These restrictions are summarized in the discussion in [[DEFINE FIELD command]].</p> | |||
[[Category:Model 204 files]] | |||
[[Category: | |||
Latest revision as of 22:45, 9 May 2014
Combining attributes
When deciding on combinations of field attributes, use the following chart to see if the combination you want to use is valid.
The chart key explains the codes used in the chart.
Field attribute combinations
| Attribute | KEY | ORD CHAR | ORD NUM | FRV | UNQ | NR | DEF | LVL | ONE | INV | STR | FLT | BIN | COD | FV | OCC | LEN | PAD | UPD | BLOB | CLOB | MINLOBE | CHUNK | UTF8 | UTF16 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KEY | N | N | |||||||||||||||||||||||
| ORD CHAR | N | N | N | N | N | ||||||||||||||||||||
| ORD NUM | N | N | N | N | N | ||||||||||||||||||||
| FRV | R | N | N | N | N | N | |||||||||||||||||||
| UNIQUE (UNQ) | @ | @ | N | N | N | N | |||||||||||||||||||
| NUM RANGE (NR) | N | N | =1 | N | N | ||||||||||||||||||||
| DEFERRABLE (DEF) | @ | @ | @ | N | @ | N | N | ||||||||||||||||||
| (LVL) | |||||||||||||||||||||||||
| AT-MOST-ONE (ONE) | N | ||||||||||||||||||||||||
| INVISIBLE (INV) | @ | @ | @ | @ | N | N | N | N | N | N | N | N | |||||||||||||
| STRING (STR) | N | N | N | N | |||||||||||||||||||||
| FLOAT (FLT) | N | N | N | N | N | F | R | N | N | N | |||||||||||||||
| BINARY (BIN) | N | N | N | N | N | N | |||||||||||||||||||
| CODED (COD) | F | F | N | N | N | ||||||||||||||||||||
| FEW VALUED (FV) | @ | @ | N | N | |||||||||||||||||||||
| OCCURS (OCC) | =1 | =1 | N | @ | @ | @ | |||||||||||||||||||
| LENGTH (LEN) | N | @ | N | F | @ | N | N | ||||||||||||||||||
| PAD | N | N | N | N | R | N | N | ||||||||||||||||||
| UPDATE (UPD) | N | ||||||||||||||||||||||||
| BINARY_LARGE_OBJECT (BLOB) | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | |||||||||
| CHARACTER_LARGE_OBJECT (CLOB) | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | |||||||||
| MINLOBE (MINLOBE) | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | |||||||||
| CHUNK (CHUNK) | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | |||||||||
| UTF8 (UTF-8) | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | |||||||||
| UTF16 (UTF-16) | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N |
Key to chart codes
| Code | Meaning |
|---|---|
| N | This attribute combination is not valid. |
| R | This attribute combination is required. |
| @ | One of these attributes is required. You can choose any one of the attributes marked, but you must choose at least one. |
| =1 | The OCCURS clause is valid with this attribute only if defined as OCCURS=1. You cannot enter multiple field values for fields with these attributes. |
| F | The FLOAT attribute requires the LEN attribute. Since the FLOAT attribute can also be used with the CODED attribute, this is the only circumstance that the LEN attribute is valid with CODED attribute. |
Some of the invalid combinations are direct conflicts, such as UNIQUE and DEFERRABLE; others describe meaningless situations or unusable fields, such as ORDERED CHARACTER and ORDERED NUMERIC.
In addition, some attributes require other attributes. FLOAT, for example, requires a LENGTH specification.
Field descriptions that contain invalid combinations are rejected.
The "Field attribute combinations" chart is for Entry Order files. More stringent restrictions are placed on fields that are used as sort keys, hash keys, or record security fields. These restrictions are summarized in the discussion in DEFINE FIELD command.