convert to匹配模式优化，允许两个单词中间有多个空格

Co-authored-by: Nshihuixing <shihuixing@jd.com>

	add reg2select, for oracle, sql server and other dbms

	JSONFind loops cost too much time for complicate SQL.

	add test cases
	comments use english more understandable

	column-not-allow-type show be L9 as it's name said

	make cover passed
	make test-cli passed

	check suggest.Content != ""

	string -> int can use index

Go 1.16

The go command now builds packages in module-aware mode by default, even
when no go.mod is present. This is a big step toward using modules in
all projects.

Co-authored-by: Nqifanwang <qifanwang@tencent.com>

Co-authored-by: Nqifanwang <qifanwang@tencent.com>

Co-authored-by: Nqifanwang <qifanwang@tencent.com>

COL.014 modify the judgment about the character set;COL.012/COL.015 a…

COL.014 modify the judgment about the character set;COL.012/COL.015 add the judgment about the json type;ALT.001 modify the judgment about the ;fix func ShowCreateTable's error when table is partition;