* [TD-5625]<fix>: taosdemo don't use printf for data generation.

* re cherry-pick

* [TD-5445]<fix>: taosdemo bug stmt interface with sample data.

sync from develop branch.

* refactoring some macros.

* fix mac compile error.

* [TD-4068]<feature>: taosdemo support stmt.

for easy merge purpose. disabled in master.

* fix clang compile error.

* fix memory leak, add more macros. change sqlcount to int

* fix rest segfault.

* add stmt_errstr() for reason print.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-3197]<fix>: taosdemo and taosdump coverity scan issues.

* exit if read sample file failed.

* fix converity scan issue.

* fix coverity scan issue.

* fix coverity scan memory leak.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-5479]<fix>: taosdump -S -E does not work.

* taosdemo support timestamp step from command line.

* fix help msg.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-5479]<fix>: taosdump -S -E does not work.

* taosdemo support timestamp step from command line.

sync from develop branch.

* copy from develop branch. stmt: 0, nanosec: 0

* set thread name disabled on master branch.

* [TD-5398]<fix>: taosdemo 4096 columns table creation failed.

* change column name prefix from col to c for maxium column number to fix buffer length.

* use accurate buffer length.

* fix test case for column name be shorter.

* remove space between columns and tags.

* change sql buffer to 1M align with taosdef.h.

* column buffer length be calculated.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-5398]<fix>: taosdemo 4096 columns table creation failed.

* change column name prefix from col to c for maxium column number to fix buffer length.

* use accurate buffer length.

* fix test case for column name be shorter.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-5300]<fix>: taosdemo stmt debug print.

* fix default iface is unknown.

* merge with TD-5300 fix against develop

* cherry pick from develop branch.

* [TD-5136]<feature>: taosdemo simulate real senario.

* update test case according to taosdemo change

* adjust range of semi-random data.

* make demo mode use different tag name and value.

* change malloc to calloc for pid allocation.

* fix typo.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-3197]<fix>: taosdemo and taosdump coverity scan issues.

* exit if read sample file failed.

* fix converity scan issue.

* fix coverity scan issue.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-5302]<fix>:taosdemo stmt interlace.

* fix the logic interlace rows compare insert rows.

* [TD-5242]<feature>: taosdemo support max columns align with TSDB defines.

* fix records/sec format.

* [TD-5300]<fix>: taosdemo stmt debug print.

* fix default iface is unknown.

* cherry pick from develop branch.

* [TD-5136]<feature>: taosdemo simulate real senario.

* update test case according to taosdemo change

* adjust range of semi-random data.

* make demo mode use different tag name and value.

* change malloc to calloc for pid allocation.

* cherry pick from develop branch.

* [TD-5136]<feature>: taosdemo simulate real senario.

* update test case according to taosdemo change

* adjust range of semi-random data.

* make demo mode use different tag name and value.

* cherry pick from develop branch.

* [TD-5136]<feature>: taosdemo simulate real senario.

* update test case according to taosdemo change

* adjust range of semi-random data.

* [TD-3197]<fix>: taosdemo and taosdump coverity scan issues.

* exit if read sample file failed.

* fix converity scan issue.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-3197]<fix>: taosdemo and taosdump coverity scan issues.

* exit if read sample file failed.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-4918]<fix>: taosdemo subscribe endAfterResume.

* fix mask length.

* fix heap use-after-free.

* fix illegal input value of consume.

* [TD-4918]<fix>: taosdemo subscribe endAfterResume.

* fix mask length.

* fix heap use-after-free.

* [TD-4892]<fix>: taosdemo subscribe fetch result.

* fix stbname length.

* restrict prefix length.

* submit empty

* fix minor code.

* fix crash if no result file.

* decrease few debug print level.

* [TD-3801]<fix>: taosdump coverity scan issue.

* merge from commit: 069169e7 and fix coverity scan issue.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-4902] FIX with 1 char

* Fix prompt of -m @ taosdemo
Co-authored-by: NSunShine Chan <chenweican@gmail.com>
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-4892]<fix>: taosdemo subscribe fetch result.

* fix stbname length.

* restrict prefix length.

* submit empty

* fix minor code.

* fix crash if no result file.

* [TD-4892]<fix>: taosdemo subscribe fetch result.

* fix stbname length.

* restrict prefix length.

* submit empty

* fix minor code.

* [TD-4823]<fix>: taosdemo getTableName return empty.

* fix typo.

* check table name is empty in early stage.

* [TD-4823]<fix>: taosdemo getTableName return empty.

* fix typo.