v0.20.0-beta4

Known issues

• After updating Vitess MySQL server, we are having some problems connecting from JDBC MariaDB drivers (#807) (vitessio/vitess#4603)

Bugfixes

• sql/plan: make sure outdated indexes can be dropped
• sql/analyzer: correctly qualify aliases with the same name as col
• Fix validation rule to detect tuples in projections or groupbys (src-d/go-mysql-server#672)
• sql/analyzer: only check aliases to qualify in the topmost project (src-d/go-mysql-server#690)
• Fix special case for aggregation in ORDER BY
• Try to order by function (src-d/go-mysql-server#692)

New features

• Suggest table/column/indexes names on missing errors
• sql: HAVING clause
• Support SHOW SCHEMAS (upgrade vitess to v1.6.0) (src-d/go-mysql-server#696)
• function: LOC function implementation (#798)

Performance improvements

• Make mapping per partition on Index creation, improving performance (src-d/go-mysql-server#681).