function, and a ternary <function>triConsistent</> function.

<function>triConsistent</> covers the functionality of both, so providing

triConsistent alone is sufficient. However, if the boolean variant is

significantly cheaper to calculate, it can beadvantegous to provide both.

significantly cheaper to calculate, it can beadvantageous to provide both.

If only the boolean variant is provided, some optimizations that depend on

refuting index items before fetching all the keys are disabled.

returned by <function>extractQuery</> for this <literal>query</> datum.

Each element of the

<literal>check</> array is TRUE if the indexed item contains the

corresponding query key,ie, if (check[i] == TRUE) the i-th key of the

corresponding query key,i.e., if (check[i] == TRUE) the i-th key of the

<function>extractQuery</> result array is present in the indexed item.

The original <literal>query</> datum is

passed in case the <function>consistent</> method needs to consult it,