tindexoptions_type.htm

来自「Absolute Database 5.12 src. Absolute Da」· HTM 代码 · 共 90 行

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<span style="font-family:Helvetica,Arial; font-size:12pt; color:#000000"><b>TIndexOptions type</b><b>
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<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">Describes the attributes of an index.
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<b>Unit</b>
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Db
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<b>type</b>
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  TIndexOption = (ixPrimary, ixUnique, ixDescending, ixCaseInsensitive, ixExpression, ixNonMaintained);
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  TIndexOptions = <b>set of</b> TIndexOption;
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<b>Description</b>
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TIndexOptions is a set of attributes that applies to a specific index. A TIndexOptions value can include none or some of the following values:
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<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000"><b><u>Value</u></b>
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<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000"><b><u>Meaning</u></b>
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<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">ixPrimary
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<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">The index is the primary index of the table.
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<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">ixUnique
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<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">Each value in the index is unique; there are no duplicates.
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<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">ixDescending
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<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">The index imposes a descending sort order.
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<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">ixCaseInsensitive
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<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">The index sorts records case insensitively.
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