prepare all subqueries object before launch subqueries. and add some …

prepare all subqueries object before launch subqueries. and add some check for global status object  during super table query.

# Conflicts:
#	src/client/src/tscFunctionImpl.c
#	src/client/src/tscServer.c

TBASE-1398 #1073

return if fail to open file, otherwise coredump

#1065 add quotes to binary values

[#909]

[#909]

[#1054]

[#1054]

Feature/cgodll

CGO DLL

Update TAOS SQL-ch.md

update the taos sql document.

replace grafana subscribe sql

[#1059 TBASE-1436]

add the union support in sql parser: fix memory leaks and refactor some functions, improve the performance of some functions. #1032. [TBASE-1140]

[#issue-1057 TBASE-1433]

Update tscUtil.c

fix invalid release operatons

fix the invalid release operations when the database is dropped and the metermeta cache is cleaned up at the client side. #1053  [tbase-1435]

Update connector-ch.md