Delete cardinality property

[takapi327]

Implementation Details

Since MySQL generates cardinality values based on statistics, they may not be accurate.

MySQL generates the index cardinality based on statistics stored as integers, therefore, the value may not be necessarily > exact.

https://www.mysqltutorial.org/mysql-index/mysql-index-cardinality

This is why tests sometimes fail. Testing with unstable elements is a waste of time and effort, and there should be no need to check cardinality values if you know you can get data.

==> X ldbc.tests.LdbcDatabaseMetaDataTest.ldbc: getIndexInfo  0.011s munit.ComparisonFailException: /home/runner/work/ldbc/ldbc/tests/src/test/scala/ldbc/tests/DatabaseMetaDataTest.scala:1782
1781:      )
1782:    )
1783:  }
values are not the same
=> Obtained
Vector(
  "connector_test, null, tax, false, null, PRIMARY, 3, 1, id, A, 2, 0, null"
)
=> Diff (- obtained, + expected)
 Vector(
-  "connector_test, null, tax, false, null, PRIMARY, 3, 1, id, A, 2, 0, null"
+  "connector_test, null, tax, false, null, PRIMARY, 3, 1, id, A, 3, 0, null"
 )

Fixes

Fixes #xxxxx

Pull Request Checklist

• Wrote unit and integration tests
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code formatting by scalafmt (sbt scalafmtAll command execution)
• Add copyright headers to new files

References