tidb-server v1.0.7

• Optimize the FIELD_LIST command
• Fix data race of the information schema
• Avoid adding read-only statements to history
• Add the session variable to control the log query
• Fix the resource leak issue in statistics
• Fix the goroutine leak issue
• Add schema info API for the http status server
• Fix an issue about IndexJoin
• Update the behavior when RunWorker is false in DDL
• Improve the stability of test results in statistics
• Support PACK_KEYS syntax for the CREATE TABLE statement
• Add row_id column for the null pushdown schema to optimize performance