* Filter the not exists filter when fetch edges.

* Fix the test cases.

* Add the case with exist and nonexist edge.

* Using kEmpty instead of Value().

* Change the filter name.

* Add method to build expression.

* Using property expression instead of variable for the filter push-down.

* Rewrite sym expr access method by visitor

* Close graph client

* Fix list/set/map expression

* Support default value expr

* update

* rebase upstream

* address comment

Co-authored-by: bright-starry-sky <56461666+bright-starry-sky@users.noreply.github.com>

* Rename OptGroupExpr to OptGroupNode

* Rename rule set

* Update rules

* add limit push down optimization rule

* fix lish push down

* add test for limit push down rule

* add clone function for Limit/Project plannode

* update code

* add NoTransform func for TransformResult

* fix static function naming style

* fix name

* fix name

* check result data in test_optimizer

* fix

* fix build failed

* add TopN PlanNode and Executor

* add topn rule

* fix topn rule

* fix auto

* add topn rule test

* fix indent

* fix conflict

* fix conflict

* fix ;

* add newline

* fix colNames

* update code

* update code

* fix static function naming style

* fix name

* fix name

* check result data in test_optimzier

* fix

* Improve test with pytest fixture

Format

Simplify

* refactor class fixture

* Replace CommonTtypes with ttypes

Extract fill_ve function

Fix plan node name typo

Try to fix checkout action

* Fix path test failure

* Try to close socket

* Let the optimizer keep a single instance in Query Engine

* Fix failed test case

* Fix typo

Co-authored-by: Yee <2520865+yixinglu@users.noreply.github.com>

* fix yield input pipe'prop

* add test

* update test

* wrap into func

* fix yield constant bug

* wrap into isAllPropsEmpty()

Co-authored-by: Yee <2520865+yixinglu@users.noreply.github.com>

* Add the cases about permission.

* Tune the permission cases.

* Run in parallel.

* Make the permission error message more clear.

* Search the result.

* Will not check space when not enable authorize or god user.

* Don't return space id in error message.

* Don't require user/password for create nebula client.

* Only check permission when enable authorize.

* Add authorize configuration to config file.

* Remove the simpler autherticator.

* Move the option about permission.

Co-authored-by: Yee <2520865+yixinglu@users.noreply.github.com>

* list change to set

* check_subgraph_result

* add line

* address comment

* fix error

* address comment

Co-authored-by: Yee <2520865+yixinglu@users.noreply.github.com>

* Fix go it.

* Fix go ut.

* Fix go m to n.

* Fix ut.

* Fix symbol test.

* Add pattern match method for each OptRule

* Rename parameters

* Fix optimizer bug

* Fix comments

* Simplify matched pattern

* Fix OptGroupExpr exploration

* Fix comments

* Explore OptGroup util max round

* Add Variable/ColsDef/ColDef.

* Add symtable for plannode.

* Update set input and set output.

* Rebase and fix.

* Build relationships of variables.

* Implement updateAllOccurrence.

* Fix plan desc.

* Add test and fix bug.

* Add qctx for plan node.

* Add read by and written by.

* Address comment.

* Rebase and fix test.

* Fix compile.

* Address comment.

* Rebase and fix ut.

* Delete derivatives and dependencies.

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>

Co-authored-by: Yee <2520865+yixinglu@users.noreply.github.com>

* fix ci check result wrong

* address comment

Co-authored-by: Shylock Hg <33566796+Shylock-Hg@users.noreply.github.com>
Co-authored-by: Yee <2520865+yixinglu@users.noreply.github.com>

Co-authored-by: Yee <2520865+yixinglu@users.noreply.github.com>

* replace graphd configs with Nebula 1.0 version and add enable_authorize and auth_type flag options when start Nebula service

restore options in Nebula 1.0

remain mutable options in gflags.json un changed

replace graphd configs with Nebula 1.0 version and add enable_authorize and auth_type flag options when start Nebula service

restore options in Nebula 1.0

remain mutable options in gflags.json un changed

replace graphd configs with Nebula 1.0 version and add enable_authorize and auth_type flag options when start Nebula service

restore options in Nebula 1.0

remain mutable options in gflags.json unchanged

* Fixed session timeout when FLAGS_session_idle_timeout_secs == 0

* reverted session_idle_timeout_secs back

* add comment

* Tests/add case for time index bound (#307)

* Remove timezone field.

* Fix the value to string.

* Remove extra blank.

* Add more.

* Correct the typo.

* Add test cases for index bound.

* Correct the error.

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>

* Reuse the vid type check function. (#313)

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>

* add comment

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>
Co-authored-by: Shylock Hg <33566796+Shylock-Hg@users.noreply.github.com>

* Add clone function for GetNeighbors plan node

* Move index scan clone to plan node

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>
Co-authored-by: cpw <13495049+CPWstatic@users.noreply.github.com>

Force to merge because the issue cannot be fixed before CI passes

* add starts/ends-with expressions

* fix func name typo

* fix reserved keywords

* fix reserved keywords

* Fix CI failure

Co-authored-by: yaphet <4414314+darionyaphet@users.noreply.github.com>
Co-authored-by: Yee <2520865+yixinglu@users.noreply.github.com>

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>
Co-authored-by: Yee <2520865+yixinglu@users.noreply.github.com>

* Add conjunct path and semi shortest path executor.

* Implement bfs shortest executor.

* Implement conjunct path.

* Implement single pair bfs shortest.

* Debug.

* Rebase and fix.

* Refactor: save edges when expand and build result paths when meet.

* Add algo node and executor.

* Rebase and fix.

* Fix build interim path with edge name.

* Add test for bfs shortest executor.

* Add conjunct path test and fix bug.

* Add integrate test.

* Address comment.

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>

* Remove timezone field.

* Fix the value to string.

* Remove extra blank.

* Add more.

* Correct the typo.

* Add test cases for index bound.

* Correct the error.

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>

* fix extractPropExprs & add test case

* add test

* add test case

* add ExtractPropExprVisitor

* add visitor

* address comment

* address comment

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>

* optimizer_rule_index

* added test cases

* Addressed yee's comments

* Addressed CPWstatic's comments

* To improve the FilterItems from tuple to struct

* fixed column def error;  improved error message.

* Improve code

* Resolved conflict

* Removed useless code

* LabelAttributeExpression rewrite

* Support the yield clause when fetch vertices on *.

* Add cases for yield when on *.

* Add more intergrate testing cases.

* Extra confirm the onStar mark.

* Change value to empty when lack tag.

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>

* Make static empty result initialize lazily

* Rename static functions

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>

* Update SpaceDesc usage

* Fix expression error

* Fix CI failure

* Continue to fix expression decode/encode error

* add TopN PlanNode and Executor

* fix executor

* remote notes

* fix varName()

* fix topn

* fix sort

* fix SortTest error

* fix topn test

* fix topn test

* use template to simply iters

* improve topn

* support JoinIter and PropIter sort

* rename iter

* change plan desc

* fix factorsString

* remove notes

* Remove timezone field.

* Fix the value to string.

* Remove extra blank.

* Add more.

* Correct the typo.

Co-authored-by: dutor <440396+dutor@users.noreply.github.com>