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 32: | Line 32: | ||
<th>UTF16</th> | <th>UTF16</th> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>KEY</td> | <td>KEY</td> | ||
| Line 53: | Line 54: | ||
<td> </td> | <td> </td> | ||
<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> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>ORD CHAR </td> | <td>ORD CHAR </td> | ||
| Line 88: | Line 90: | ||
<td>N</td> | <td>N</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>ORD NUM </td> | <td>ORD NUM </td> | ||
| Line 116: | Line 119: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>FRV</td> | <td>FRV</td> | ||
| Line 144: | Line 148: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>UNIQUE (UNQ)</td> | <td>UNIQUE (UNQ)</td> | ||
| Line 172: | Line 177: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>NUM RANGE (NR)</td> | <td>NUM RANGE (NR)</td> | ||
| Line 200: | Line 206: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>DEFERRABLE (DEF)</td> | <td>DEFERRABLE (DEF)</td> | ||
| Line 228: | Line 235: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>(LVL)</td> | <td>(LVL)</td> | ||
| Line 256: | Line 264: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>AT-MOST-ONE (ONE)</td> | <td>AT-MOST-ONE (ONE)</td> | ||
| Line 284: | Line 293: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>INVISIBLE (INV)</td> | <td>INVISIBLE (INV)</td> | ||
| Line 312: | Line 322: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>STRING (STR)</td> | <td>STRING (STR)</td> | ||
| Line 340: | Line 351: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>FLOAT (FLT)</td> | <td>FLOAT (FLT)</td> | ||
| Line 363: | 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 387: | 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 411: | 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 435: | 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 455: | 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 460: | Line 496: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>LENGTH (LEN)</td> | <td>LENGTH (LEN)</td> | ||
| Line 483: | 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 507: | 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 520: | 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 532: | Line 583: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>BINARY_LARGE_OBJECT (BLOB)</td> | <td>BINARY_LARGE_OBJECT (BLOB)</td> | ||
| Line 555: | 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 578: | Line 635: | ||
<td> </td> | <td> </td> | ||
<td>N</td> | <td>N</td> | ||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | |||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
<tr> | |||
<td>MINLOBE (MINLOBE)</td> | <td>MINLOBE (MINLOBE)</td> | ||
<td>N</td> | <td>N</td> | ||
| Line 601: | Line 664: | ||
<td> </td> | <td> </td> | ||
<td>N</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 610: | 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 622: | 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 631: | 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.