Quote table name with backticks to escape special characters in spark.read.table()

[seankao-az]

Description

Quote table name with backticks to escape special characters in spark.read.table()
Follow up on

• Percent-encode invalid flint index characters #215

which allows for creating flint index on table name with special characters, but build() on these index fails if table name not escaped by backticks (`)

Issues Resolved

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[dai-chen]

Could you check if this also needs change: https://github.com/opensearch-project/opensearch-spark/blob/main/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/FlintSpark.scala#L375C28-L375C28

[seankao-az]

Missed that one.. added the change.
Not quite sure how to test this one in UT, though. In IT we cannot create table with special characters due to spark table identifier constraint.

[dai-chen]

Missed that one.. added the change. Not quite sure how to test this one in UT, though. In IT we cannot create table with special characters due to spark table identifier constraint.

No problem. Should be fine if all existing IT can pass. Thanks!

[dai-chen]

Thanks for the fix!

[opensearch-trigger-bot]

The backport to 0.1 failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/opensearch-spark/backport-0.1 0.1
# Navigate to the new working tree
pushd ../.worktrees/opensearch-spark/backport-0.1
# Create a new branch
git switch --create backport/backport-224-to-0.1
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 6e163e77a2d8598ad105835f3ce20677d84fea84
# Push it to GitHub
git push --set-upstream origin backport/backport-224-to-0.1
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/opensearch-spark/backport-0.1

Then, create a pull request where the base branch is 0.1 and the compare/head branch is backport/backport-224-to-0.1.