Patterns #93
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Patterns #93
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We still had a reference to the old draft copy of apophenia. Removed it, updated go.mod/go.sum.
enumer package seems to have changed. i don't know why the other thing also updated with it.
This adds a feature to allow creation of patterned data with bitmasks corresponding to patterns being inserted in int-type fields. The only currently supported pattern is "triangle", which does digits in a pattern like 001012012301234[...] up to a specified limit. It can also generate masks for columns where the generated digit is equal to, equal to or greater than, or lower than a designated value, or the first time that values up to N were generated in each run. For N=10, this means that equal(0) is 10/55 of the input space, while equal(9) is 1/55 of the input space, but distinct queries against the values masked by them will produce exactly one value either way; on the other hand, once(9) is 10/55 of the input space, and denotes 10 distinct values.
Value computations were wrong for later splits (again!), because I was dividing by the value of t.n, when that wasn't actually relevant. Made patterns independent; fields can specify the traits of their patterns, or just inherit from a parent. This allows having specific fields using different pattern rules. Pattern fields can now infer their maximum values, approximately; if no maximum is specified, they'll guess their maximum range, although if there's exponents involved, they'll guess a bit high unless the column space is close to filling out a cycle.
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This is the stuff to add "patterns" for use with joins and similar things, also some cleanup like removing the old copy of Apophenia.