mirror of https://github.com/apache/druid.git
16817e408d
* SQL + Expressions = Best friends forever. - Use expressions as a projection layer for anything that can't be expressed using traditional Druid extractionFns. Sometimes they're embedded directly (like "expression" filters, builtin aggregators, or "expression" post-aggregators). Sometimes they're referenced through virtual columns (like dimensionSpecs, which can't innately reference functions of more than one column without the virtual column layer). - Add many new functions and operators, taking advantage of the expression capability (see the querying/sql.md doc). - Improve consistency of constant reduction and of casting by using Druid expressions for this instead of Calcite's RexExecutor. * Fix casting bug, and other code review comments. * Fix docs. |
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| .. | ||
| aggregations.md | ||
| caching.md | ||
| datasource.md | ||
| datasourcemetadataquery.md | ||
| dimensionspecs.md | ||
| filters.md | ||
| granularities.md | ||
| groupbyquery.md | ||
| having.md | ||
| joins.md | ||
| limitspec.md | ||
| lookups.md | ||
| multi-value-dimensions.md | ||
| multitenancy.md | ||
| post-aggregations.md | ||
| query-context.md | ||
| querying.md | ||
| searchquery.md | ||
| searchqueryspec.md | ||
| segmentmetadataquery.md | ||
| select-query.md | ||
| sorting-orders.md | ||
| sql.md | ||
| timeboundaryquery.md | ||
| timeseriesquery.md | ||
| topnmetricspec.md | ||
| topnquery.md | ||