Implemented enhancements:

• Compile error: parse.go:248:77: undefined sqlparser.SCHEMAS #826
• Reduce amount of implemented code on Expressions #772
• Support for regexp_matches #756
• Request: SLEEP function #647
• Parallelize index creation #346
• TPC-H: unsupported feature: HAVING #56
• sql: implement count distinct #785
• server: kill queries on connection closed #769
• sql/analyzer: refactor pushdown rule #752
• sql/analyzer: refactor resolve_natural_joins rule #750
• replace all gopkg.in imports and use only go mods #736
• sql: implement EXPLODE and generators #720
• sql/analyzer: refactor and fix bugs in qualify_columns rule #706
• Support SHOW SCHEMAS (upgrade vitess to v1.6.0) #696
• Add build, tag for oniguruma, remove for mysql_go_regex, update README #660

Fixed bugs:

• Races detected on running gitbase during the test #828
• Failing test for connection handler in Linux #821
• LIKE fails when new lines are present #814
• ORDER BY does not fail on non-existent columns #813
• resolveDatabase is not working if database is changed using USE #810
• Not support types of char and datetime #807
• Long processing queries don't stop if the connection is dead/killed until the timeout triggers #800
• sleep function cannot be cancelled #797
• Connection problems and possible fix #796
• Error on CASE statements when result is not bool #787
• Error on Travis testing jdk 10 #782
• NULL is not printed in the resulting table #779
• No root span created for a query #778
• Handle strings on EvaluateCondition #770
• ARRAY_LENGTH is not handling null values well #766
• [Panic] - on HAVING query #764
• JSON_EXTRACT returns strings quoted #761
• unable to cast <nil> of type <nil> to float64 #759
• Panic on query using EXPLODE #755
• LEFT JOIN and RIGHT JOIN are returning more than a single row per left/right row #742
• Cannot return NULL in a CASE branch #740
• Cannot parse "show create table a.b" #733
• gitbase dies for query with WHERE NOT <not boolean value> #726
• JSON_EXTRACT cannot cast JSON string #709
• Nested SUBSTRING fails with INVALID_ARGUMENT error #705
• Incorrect type name for int64 in create table #702
• Make sure dates and times are within the supported range #698
• unable to cast "<repository name>" of type string to int64 #691
• Index generation is slower than previous implementation #676
• ORDER BY with aggregations fails with a missleading error #675
• Problems dropping outdated index #674
• Bug: Mis-formatted error diagnostics for incorrect function use #665
• Using fqn in SHOW CREATE TABLE errors #662
• Indexes on language func does not work with aliased cols #639
• KILL fails with err message "closed network connection" #635
• commits does not have column commit_author_when #630
• Incorrect projected fields #619
• Support DISTINCT and multiple expressions on aggregation functions #162
• sql: fix SQL method for arrays of JSON #790
• sql: use custom boolean coercion logic in condition evaluation #768
• function: correctly transform up explode nodes #757
• sql: correctly handle nulls in SQL type conversion #753
• sql/analyzer: back-propagate expression names after adding convert #739
• Upgrade vitess to v1.7.0 #732
• Make boolean expression compatible with MySQL #731
• Make PROCESSLIST and KILL compatible with MySQL #722
• sql/analyzer: convert_dates should not change column name #721
• server: guard sessions access in mutex #713
• sql/analyzer: run convert_dates rule after prune_columns #703
• sql/analyzer: alias projected columns wrapped in converts #701
• Try to order by function #692
• sql/analyzer: only check aliases to qualify in the topmost project #690
• Make mapping per partition #681
• server: correctly set binary charset on blob fields #673
• Fix validation rule to detect tuples in projections or groupbys #672
• Close iterators #655
• Check projection aliases when assigned to index. #640

Closed issues:

• Add sql/expression/literal\_test.go #776
• FR: Select single fields from substring search or split results #747
• Add FIRST/LAST aggregations #718
• Add SUBSTRING_INDEX #716
• Add LENGTH function (for strings) #715
• LEFT OUTER JOIN support #707
• vet tool #686
• [FEATURE] Suggest similar table/column names when one is not found in a query #684
• Upgrade pilosa to v1.3.0 #679
• document environment variables in here, not just gitbase #668
• Add Greatest, Least #664
• DATE_SUB and DATE_ADD functions #663
• Add support for DATE function #653
• Add support for SHOW SCHEMAS #652
• count is int32 #642
• Feature request: don't die on panic #625
• Suppress build warning for oniguruma #623
• yearweek function #616
• Replace and test BoltDB by github.com/etcd-io/bbolt #614
• Use in-memory join when one of the tables is small enough #577
• Add ...

Implemented enhancements:

• Provide a single, default, performant and stable regex implementation #615
• Make oniguruma a default regex engine #618

Fixed bugs:

• mysql.NewAuthServerStatic does not implement auth.Auth interface #622
• Boolean type does not work in raw CREATE TABLE queries #611
• Upgrade go-vitess.v1 to version v1.5.0 #617

Merged pull requests:

• Fix KILL to try to kill by the query ID instead of connID #629
• Update readme #624

Implemented enhancements:

• Supported client examples do not use defaults for user, pass and database names #597
• Improve Function invalid argument number error specifying the affected function name #591
• Run staticcheck on go-mysql-server - list of things to verify/check #581
• CASE statement #575
• sql: add Databaser interface for cleaner analyzer rules #592

Fixed bugs:

• Restart gitbase makes indexes outdated #612
• Running a query containing the REGEXP function with an invalid pattern breaks #606
• KILL generates an error by not returning an error or a result #601
• Warnings are being cleared after every query #600
• Possible error in SHOW CREATE TABLE #594
• Improve Function invalid argument number error specifying the affected function name #591
• alias used on a expression in the same projection should fail always #590
• EXPLAIN only shows the first index #585
• Round with decimal panics #579
• [SQLAlchemy] missing column in SHOW FULL TABLES #562
• Upgrade go-vitess.v1 to version v1.5.0 #617
• Fix checksum for multi underlying tables. #613
• Clear warnings just after successful query. #608
• Check if regexp matcher is nil. #607
• Support SQLAlchemy syntax for show create table #598
• sql: fix row construction in innerJoinIter #595

Closed issues:

• [SQLAlchemy] SELECT @@transaction_isolation support or workaround #564
• [SQLAlchemy] support SHOW collation #561

Merged pull requests:

• Update examples #610
• sql/analyzer: fix use of declared aliases in the same projection #609
• add experimental optional feature to use in memory joins #605
• server: return empty results when query is KILL #604
• sql/analyzer: remove QueryProcess nodes from subqueries #603
• sql: better errors for invalid argument number #596
• sql: implement dummy ROLLBACK #593
• sql: add transaction_isolation default value #589
• sql/*: fix show tables to match MySQL spec #588
• sql/*: implement show collation #587
• sql/index/pilosa: return all index ids in lookups #586
• sql: use checksums to determine if indexes are outdated #583
• fix errors pointed out by staticcheck #582
• Fix ROUND function for 2 args. #580
• sql/plan: speed up InnerJoin iterator #578
• sql/(analyzer,parse,expression): implement case expression #576

Implemented enhancements:

• Add IF(), IFNULL(), NULLIF() #527
• Add NOW function #566
• Rule to remove unused columns from projections and pushdown #570
• [Tableau] - Support DEFAULT expression #487
• Reference substring with substr and mid #483

Fixed bugs:

• Add Tableau to SUPPORTED_CLIENTS.md #558
• unsupported syntax: <nil> #553
• IsNullable does not retain null when we return nil in expressions #546
• Check correct usage of Null value #542
• Unable to connect to _example/main.go mem server using Java JDBC driver #319
• Replace one regex by pool of regex matchers. #557
• Implement ifnull and nullif functions. #555
• Add explicit error when ON clause is missed for JOIN statement #554

Closed issues:

• go 1.11.2 doesn't fetch auth #551

Merged pull requests:

• analyzer: fix fields of subqueries too on prune_columns #574
• analyzer: correctly search for subquery used columns #573
• analyzer: add rule to prune unnecessary columns #572
• function: implement NOW function #568
• analyzer: wait until NaturalJoins are resolved on reorder rule #567
• *: fix query cancellation #565
• Fix soundex type #560
• docs: add tableau to supported clients #559
• Make conversion error clearer and less detailed. #556
• Add error for subqueries #552
• Feature/mid substr #548

Implemented enhancements:

• Add REVERSE, REPLACE, REPEAT #540
• Add RTRIM, TRIM, LTRIM #537
• Add SQRT/POWER function #523
• add navicat support #521
• Add support for using desc table (short version of describe table) #494
• Implement RPAD, LPAD #484
• Update year and org name in LICENSE #476
• Define a simple interface to be able to implement authentication and authorization. #469
• Test tableau with go-mysql-server and add integration tests with the queries used by the application itself. #468
• Test grafana with go-mysql-server and add integration tests with the queries used by the application itself. #467
• Collect session warnings #465
• Support negative integers in expressions #444
• Implement SHOW WARNINGS; #442
• Add support for LOG, LOG2, LOG10, LN #392
• Test 3rd party applications integration #387
• Show warnings - implementation #464

Fixed bugs:

• go get is downloading a different version or readme is wrong #541
• [Tableau]: GROUP BY X with alias (as columnd name) and INNER JOIN #535
• Substring function is not parsed correctly #532
• Show table status without from/in/like or where fails to parse #530
• Group by alias (alias name is the same as column name) #524
• Disable or capture log from go-vitess #490
• panic in group by #481
• support database qualifiers #118
• Fix filtered index #550
• upgrade vitess to v1.4.0 #545
• Implement group by index #525
• Do not pull vt/logutil/level.go #514

Closed issues:

• Update missing statement on SUPPORTED.md file #533
• [Tableau] - add support for GROUP BY X #520
• this is a bug with go-vitess.v1 ? with roolback to go-vitess.v1:v1.0.0 ok when run _example/main.go #519
• [Tableau]: Add support for information_schema.columns #510
• [Tableau] - support for DATABASE() function #503
• Rule to remove unnecessary CAST nodes #502
• [Tableau] - Support for sql_select_limit #492
• [Tableau] - support for INFORMATION_SCHEMA.TABLES queries #489
• [Tableau] - default db name cannot be an empty string #488
• Please, add me as contributor #Hacktoberbest #485
• Inconsistent Errors using backticks #447

Merged pull requests:

• docs: add go-vitess dependency information #544
• Add Reverse, Repeat, Replace #543
• Add Trim, Ltrim, Rtrim #539
• docs: add missing supported expressions #538
• auth: add Audit to log user interactions #536
• Feature/pow sqrt #534
• sql/(plan,parse): fix show table status behaviour #531
• level.go doesn't panic anymore. #529
• sql: add information_schema.schemata table #528
• sql/analyzer: add rule to avoid unnecessary casts #526
• Feature/lpad rpad #522
• go-vitess@1.3.0 #518
• sql: process list now shows client address #517
• Revert "update license with year and org name" #515
• Upgrade vitess to v1.2.1 #512
• Add support for information_schema.columns #511
• Added badges in readme file #509
• sql, function: add weekday and dayofweek #507
• Implement sql_select_limit #506
• Implement DATABASE() function. #505
• Implement information_schema.tables #504
• _scripts: replace glog with logrus #501
• Add support for CONCAT_WS #500
• analyzer: fix pushdown of filters with repeated table names #498
• Correct spelling #497
• auth: add authentication and authorization interface #496
• Add support for using desc table #495
• Add support for set DEFAULT #493
• Check if eval buffer is empty. #491
• sql: function, added soundex #486
• Feature/logarithms #482
• sql: support more timestamp formats #480
• Feature/collect warnings #479
• integration: add grafana queries to go integration #477
• *: remaining fixes to make mysqldump work with go-mysql-server #474
• sql/(parse,expression): implement unary minus #456

Implemented enhancements:

• Traces should be more granular #466
• Implement table locking #410
• Implement SHOW CREATE DATABASE #407
• Add configuration per engine instance and per session #109

Fixed bugs:

• pilosa holder has to sync up data with indexes #472
• No holder! #478

Merged pull requests:

• update license with year and org name #475
• Fix Apache License #473
• sql: add timing info to span traces #470
• sql: implement SHOW CREATE DATABASE statement #460
• *: implement LOCK and UNLOCK of tables #448
• sql: plan: Add SHOW CREATE TABLE [Fix #406] #435

Implemented enhancements:

• Add support for CONNECTION_ID #433
• Implement LIKE expression #426
• Strip comments from queries #413
• Show databases #412
• USE command to change database #411
• Implement SHOW VARIABLES #409
• Implement INFORMATION_SCHEMA database with FILES and COLUMN_STATISTICS tables #408
• Implement SHOW CREATE TABLE #406
• Implement JSON_EXTRACT UDF #405
• Implement show fields from #404
• Implement show table status #403
• Resolve tables with database qualifier #402
• Add support for ROUND, FLOOR, CEIL #393
• Add support for LOWER, UPPER #390
• Add support for COALESCE #389
• Improve error on nested query without aliasing #376
• Support ON/OFF as synonyms of 1/0 #374
• Remove pilosa index driver #370
• Make compatible gitbase with MariaDB JDBC driver #359
• Upgrade go-pilosa to version 0.10.0 #353
• Show full process list #348
• Cancel creating an index by DROP #343
• Proposal: add build flag to be able to use REGEXP statement with Oniguruma #341
• sql.IndexLookup should be able to return the IDs of all indexes involved #333
• Improve the information returned by show indexes #315
• Partitions: Rules to apply Exchange operator into query trees #313
• Partitions: Exchange operator. #312
• Partitions: Change Indexable interfaces to make use of partitions #311
• Data source api: change Project and Filter pushdown interfaces #310
• Partitions: Make tables use partitions #309
• Add support for SHOW INDEXES #303
• Implement a new pilosa (server-less) index driver #302
• Rules review #294
• Implement NegateIndex in pilosa #291
• Introduce better config mechanism to engine constructor #285
• Create optimization rule to evaluate filter expressions if possible #280
• Code refactor to make use of IsUnary and IsBinary functions. #272
• Sync create index queries #271
• Split analyzer rules into several files #267
• Add SUM aggregation function #236
• Create rule to move filters from Join conditions to where clauses #235
• Index creation appears to do nothing. #231
• Add support for basic query EXPLAIN #216
• analyzer: Add to resolve index rule range checking using DescendIndex and AscendIndex. #214
• analyzer: Check rule that try merge compatible indexes. #213
• PilosaDriver: Implement SetOperations and Mergeable interfaces on IndexLookup #212
• PilosaDriver: Implement AscendIndex and DescendIndex interfaces #211
• Document motivation and scope of the project #203
• Mobiles with gomobile #198
• Implement Pilosa IndexDriver #174
• IndexLoader pilosa index implementation #173
• Standardise logging library across multiple projects #164
• Register a DUAL table by default #153
• Some changes to opentracing reported metrics #151
• Support arithmetic operators #142
• Save performance metrics #137
• Differences between MySQL parser and vitess parser regarding star expr #120
• Create String() method on Node Interface #95
• Split UDFs into several files in their own package #67
• BETWEEN Expresion #62
• Implement avg() Function #61
• Add support to sqlparser.ValTuple and sqlparser.SQLVal #60
• TPC-H: Implement Inner Join #57
• TPC-H queries #47
• Fix unsupported feature: non simple tables #46
• Implement DATE data type #45
• Implement YEAR(date) Function #43
• Implement SUBSTRING(string, start, length) function #42
• Unsupported syntax: sqlparser.ParenExpr #41
• Proposal: Specify function arity instead of using reflection #37
• Pass session around #36
• Implement null logic #33
• Implement array_length(Array)Number function #7
• Implement SHOW VARIABLES #452
• Register COALESCE function. Update docs. Add integration test to engine. #437
• Implementation of COALESCE function. #431
• Support ON/OFF for SET autocommit #383
• Drop indexes in progress. #354
• Pilosa index driver as library #308
• Implementation of Pilosa Index Driver #205

Fixed bugs:

• CREATE INDEX logs are counting elements per partition. #455
• SHOW PROCESSLIST is not showing correctly processed partitons on CREATE INDEX queries. #454
• Float results get truncated #450
• Support quoted numbers as strings #445
• SUBSTRING does not conform to MySQL behavior for 2 arguments #418
• Column name resolution in SELECT is ambigious even when using NATURAL JOIN #415
• Table names must be case insensitive #385
• Support for GROUP BY on aliased fields #375
• Describe String() method is not well implemented #358
• DESCRIBE outputs too many columns #357
• Don't preload all rows computing aggregations #331
• No data for NOT expressions with non existing value and index #323
• Panic when querying for non existing value with pilosa index #322
• crossJoinIterator is not using contexts, so queries cannot be cancelled. [#292](https://github.com/src-d/g...