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[CALCITE-1289] RexUtil.simplifyCase() should account for nullability - Calcite - [issue]
...RexUtil.simplify() returns incorrect type information if the RexNode is a CASE(CONDITION, TRUE, FALSE).  In this case, the CASE RexNode is a Boolean with isNullable == false.  But,...    Author: MinJi Kim , 2018-10-15, 14:11
[CALCITE-2619] Reduce string literal creation cost by removing charset check - Calcite - [issue]
...The cost of creating NlsString is very high, due to its charset check. In some cases, e.g., expression evaluate because of Partition Prune, the NlsString creation costs 40%+ of total executo...    Author: Ted Xu , 2018-10-15, 14:07
Query rewriting materialized view rules - Calcite - [mail # dev]
...Hello,I have some confusion regarding the query rewriting rules in Calcite and I was hoping someone could help me with that.Looking at the documentation of materialized views http://calcite....
   Author: mark pasterkamp , 2018-10-15, 12:06
[CALCITE-2620] Simplify "coalesce(null,x)" to "x" - Calcite - [issue]
..."coalesce(x0,x1,.....)" can be simplified if any of "xi" is null literal.e.g.  "coalesce(null,x)" can simplify to "x", "coalesce(x,null,y)" can simplify to "coalesce(x,y)"...    Author: pengzhiwei , 2018-10-15, 06:42
[CALCITE-2622] RexFieldCollation toString method is not deterministic - Calcite - [issue]
...It iterates over a set to print its flags....    Author: Jesus Camacho Rodriguez , 2018-10-14, 17:10
[CALCITE-525] Exception-handling in built-in functions - Calcite - [issue]
...The standard calls for certain built-in functions to throw exceptions.Examples: 1 / 0 MOD(1, 0) OVERLAY('foo' PLACING 'x' FROM -1) 'x' NOT LIKE 'x' ESCAPE 'x'First, these exceptions should o...    Author: Julian Hyde , 2018-10-13, 20:41
[CALCITE-2624] Add a rule to copy a sort below a binary operator over the left or right input - Calcite - [issue]
...Currently, the only rule that allows a sort to traverse a binary operator is the SortJoinTransposeRule. The rule was introduced mainly to push limits in the case of left and right outer join...    Author: Stamatis Zampetakis , 2018-10-13, 19:40
[CALCITE-2617] FilterProjectTransposeRule should allow filter conditions with correlated variables to be pushed down - Calcite - [issue]
...The rule always forbids conditions with correlated variables to be pushed down (as of CALCITE-769 to avoid certain problems in the decorrelation of the query). However, in the general contex...    Author: Stamatis Zampetakis , 2018-10-13, 18:50
[CALCITE-1413] New CASE statement simplification - Calcite - [issue]
...Another possible simplification for CASE statements that return boolean values.CASE WHEN p1 THEN e1 WHEN p2 THEN e2 ELSE TRUEENDwhere e1...en are boolean expressions, can be r...    Author: Jesus Camacho Rodriguez , 2018-10-13, 00:31
[CALCITE-2623] Updating unparseCall() in SqlDialect(s) for dialect specifc SqlNode unparsing - Calcite - [issue]
...Owing to the syntactical differences between Calcite SQL and certain other Dialects, emulation for SqlNode unparsing needs to be added based on the Dialect in RelToSqlConcverter.Saw some cod...    Author: KrishnaKant Agrawal , 2018-10-12, 23:30