fix: table name case sensitivity in join and pattern statement

[liu-hm19]

What type of PR is this?

/kind bug

What this PR does / why we need it:

This PR fixes the issues of the table name case sensitivity in JOIN and pattern statement.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Additional documentation e.g., design docs, usage docs, etc.:

[Yangyang96]

LFTM

[ffforest]

lgtm

[coveralls]

Pull Request Test Coverage Report for Build 11813185658

Details

• 10 of 17 (58.82%) changed or added relevant lines in 4 files are covered.
• 11 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.02%) to 49.555%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/infra/persistence/util.go	2	4	50.0%
pkg/infra/persistence/run.go	0	5	0.0%

Files with Coverage Reduction	New Missed Lines	%
pkg/engine/operation/watch.go	1	82.76%
pkg/engine/operation/parser/spec_parser.go	4	56.1%
pkg/engine/operation/parser/parser.go	6	75.61%

Totals
Change from base Build 11812336773:	-0.02%
Covered Lines:	10519
Relevant Lines:	21227

---

💛 - Coveralls