improve field type check from db to golang

[gqcn]

No description provided.

[codecov-commenter]

Codecov Report

Merging #2023 (257f5da) into master (b7794a8) will increase coverage by 0.00%.
The diff coverage is 62.74%.

@@           Coverage Diff           @@
##           master    #2023   +/-   ##
=======================================
  Coverage   76.51%   76.51%           
=======================================
  Files         515      516    +1     
  Lines       46658    46712   +54     
=======================================
+ Hits        35700    35742   +42     
- Misses       8990     8999    +9     
- Partials     1968     1971    +3     

Flag	Coverage Δ
go-1.15-386	76.41% <62.74%> (-0.02%)	⬇️
go-1.15-amd64	76.42% <62.74%> (+0.03%)	⬆️
go-1.16-386	76.44% <62.74%> (+0.02%)	⬆️
go-1.16-amd64	76.43% <62.74%> (+<0.01%)	⬆️
go-1.17-386	76.46% <62.74%> (-0.01%)	⬇️
go-1.17-amd64	76.48% <62.74%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
database/gdb/gdb_core_structure.go	71.71% <50.00%> (+2.74%)	⬆️
database/gdb/gdb_func_structure.go	65.78% <65.78%> (ø)
database/gdb/gdb_core_utility.go	57.62% <100.00%> (ø)
database/gdb/gdb_func.go	86.33% <100.00%> (ø)
os/gcron/gcron_schedule_fix.go	100.00% <0.00%> (+12.50%)	⬆️

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[houseme]

LGTM