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oaenv:home [2009/12/18 16:43] admin |
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| == COLUMN column_name == | == COLUMN column_name == | ||
| - | [[[environment_name.]database_name.]table_name.]column_name[(start, length)] | + | [[[environment_name.]database_name.]table_name.]column_name[(start, length)] |
| column_name represents a non-ambiguous column or portion of a column. | column_name represents a non-ambiguous column or portion of a column. | ||
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| DOUBLE Double-precision floating point data stored in 8 bytes. This is equivalent to a “datatype FLOAT length 8”. | DOUBLE Double-precision floating point data stored in 8 bytes. This is equivalent to a “datatype FLOAT length 8”. | ||
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| <code> | <code> | ||
| Figure 2 - Examples of Declaring Datatypes Using New and Existing Syntax | Figure 2 - Examples of Declaring Datatypes Using New and Existing Syntax | ||
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| OMNIDEX BLOB 1999 bytes bytes + 4 | OMNIDEX BLOB 1999 bytes bytes + 4 | ||
| </code> | </code> | ||
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| ==== LENGTH n ==== | ==== LENGTH n ==== | ||
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| The cardinality of a column is the number of distinct values in the column. This number should be near the actual column cardinality. Omnidex uses this number to better optimize some queries. | The cardinality of a column is the number of distinct values in the column. This number should be near the actual column cardinality. Omnidex uses this number to better optimize some queries. | ||
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| ===== $RETRIEVE_FILE ===== | ===== $RETRIEVE_FILE ===== | ||
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| <code> | <code> | ||
| $RETRIEVE_FILE(filename [,’datatype’ [,length [,’options’]]]) | $RETRIEVE_FILE(filename [,’datatype’ [,length [,’options’]]]) | ||