Gian Merlino b20e3038b6 SQL: Upgrade to Calcite 1.14.0, some refactoring of internals. (#4889) ... * SQL: Upgrade to Calcite 1.14.0, some refactoring of internals. This brings benefits: - Ability to do GROUP BY and ORDER BY with ordinals. - Ability to support IN filters beyond 19 elements (fixes #4203). Some refactoring of druid-sql internals: - Builtin aggregators and operators are implemented as SqlAggregators and SqlOperatorConversions rather being special cases. This simplifies the Expressions and GroupByRules code, which were becoming complex. - SqlAggregator implementations are no longer responsible for filtering. Added new functions: - Expressions: strpos. - SQL: TRUNCATE, TRUNC, LENGTH, CHAR_LENGTH, STRLEN, STRPOS, SUBSTR, and DATE_TRUNC. * Add missing @Override annotation. * Adjustments for forbidden APIs. * Adjustments for forbidden APIs. * Disable GROUP BY alias. * Doc reword.		2017-10-10 12:44:05 -07:00
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math-expr.md	SQL: Upgrade to Calcite 1.14.0, some refactoring of internals. (#4889)	2017-10-10 12:44:05 -07:00
papers-and-talks.md	Add more links for talks	2015-06-05 14:35:56 -07:00