Support default value

[smellthemoon]

Signed-off-by: lixinguo xinguo.li@zilliz.com
milvus-io/milvus#23337
/kind improvement

[codecov]

Codecov Report

Merging #514 (99cfeb1) into master (565c5e3) will decrease coverage by 0.47%.
The diff coverage is 54.54%.

@@            Coverage Diff             @@
##           master     #514      +/-   ##
==========================================
- Coverage   83.62%   83.15%   -0.47%     
==========================================
  Files          38       38              
  Lines        3383     3438      +55     
==========================================
+ Hits         2829     2859      +30     
- Misses        447      471      +24     
- Partials      107      108       +1     

Impacted Files	Coverage Δ
entity/columns.go	63.72% <0.00%> (-8.10%)	⬇️
client/insert.go	78.62% <66.66%> (-0.26%)	⬇️
entity/schema.go	94.92% <100.00%> (+0.77%)	⬆️

[congqixia]

/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: congqixia, smellthemoon

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