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Commit Graph

Author	SHA1	Message	Date
Andrei Stefan	09fa827adc	SQL: documentation improvements and updates (#36918 ) * Added Limitations page * Made the aggregations page follow the common template for functions * Modified all tables to have the first row's cells content centered * Polishing in other various sections	2018-12-21 23:25:54 +02:00
Marios Trivyzas	031d0566b0	SQL: [docs] Add `beta[]` markup to all SQL pages (#36471 ) Closes: #36437	2018-12-11 13:25:29 +02:00
Marios Trivyzas	3f7cae3f0d	SQL: Implement GREATEST and LEAST functions (#35879 ) Add GREATEST(expr1, expr2, ... exprN) and LEAST(expr1, expr2, exprN) functions which are in the family of CONDITIONAL functions. Implementation follows PostgreSQL behaviour, so the functions return `NULL` when all of their arguments evaluate to `NULL`. Renamed `CoalescePipe` and `CoalesceProcessor` to `ConditionalPipe` and `ConditionalProcessor` respectively, to be able to reuse them for `Greatest` and `Least` evaluations. To achieve that `ConditionalOperation` has been added to differentiate between the functionalities at execution time. Closes: #35878	2018-11-26 18:21:36 +01:00
Marios Trivyzas	410f570d5f	SQL: Implement NULLIF(expr1, expr2) function (#35826 ) NULLIF returns null if the 2 expressions are equal or the expr1 otherwise. Closes: #35818	2018-11-23 22:19:27 +01:00
Marios Trivyzas	92acf47c16	SQL: Implement NVL(expr1, expr2) (#35794 ) Add NVL as alias to IFNULL as they have the same behaviour. Add basic tests and docs. Closes: #35782	2018-11-22 11:41:00 +01:00
Marios Trivyzas	d95d885bae	SQL: Implement ISNULL(expr1, expr2) (#35793 ) Add ISNULL as an alias of IFNULL as they have the same behaviour. Add basic test and docs. Closes: #35781	2018-11-21 23:15:10 +01:00
Marios Trivyzas	e179bd393d	SQL: Implement IFNULL variant of COALESCE (#35762 ) IFNULL is a MySQL variant (also used in other DBs) which takes only 2 arguments and returns the first one that is not null. Closes: #35749	2018-11-21 17:07:07 +01:00
Marios Trivyzas	b1818dbdce	SQL: [docs] Add documentation for COALESCE (#35740 ) Follows: #35253	2018-11-21 01:43:05 +01:00

8 Commits