Rule-based joining of foreign to primary key
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United States of America Patent
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Mar 13, 2018
Issued Date -
N/A
app pub date -
Jun 27, 2014
filing date -
Jun 27, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
Linking of a child table to a parent table in a database system. For a given parent table row, an expression associated with the particular row is identified. The expression may be a semantic expression that comprises something different than or more than an equals expression or a contains expression. The expression might also take as input a field of the parent table other than the primary key of the parent table. For each of multiple (and potentially all) rows of a child table, the expression is evaluated against a foreign key of the corresponding row of the child table. If the foreign key matches the expression, an association is created, and perhaps saved, between the foreign key and the particular row of the parent table. The expressions may differ even down to the granularity of a single row in the parent table, thereby enabling perhaps custom per-row expressions.
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