Isempty

[lukasz-soszynski-eliatra]

Description

Describe what this change achieves.

Issues Resolved

List any issues this PR will resolve, e.g. Closes [...].

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[YANG-DB]

how is this related to the isEmpty ? can u please elaborate ?

[lukasz-soszynski-eliatra]

The isempty function is implemented using the Case statement. Please see: https://github.com/eliatra/opensearch-spark/blob/c270360f45264b4b1c7d177d5cc405f7c6fc94f0/ppl-spark-integration/src/main/java/org/opensearch/sql/ast/expression/IsEmpty.java#L11

The isempty function is translated into:

SELECT CASE  
       WHEN length(trim(column_name)) = 0 THEN true 
        ELSE false     
END AS is_empty

[opensearch-trigger-bot]

The backport to 0.5-nexus 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-0.5-nexus 0.5-nexus
# Navigate to the new working tree
pushd ../.worktrees/opensearch-spark/backport-0.5-nexus
# Create a new branch
git switch --create backport/backport-676-to-0.5-nexus
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 a7fe6e644b750b1a07294b8104d0fc0ab67287c1
# Push it to GitHub
git push --set-upstream origin backport/backport-676-to-0.5-nexus
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/opensearch-spark/backport-0.5-nexus

Then, create a pull request where the base branch is 0.5-nexus and the compare/head branch is backport/backport-676-to-0.5-nexus.

[opensearch-trigger-bot]

The backport to 0.5 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-0.5 0.5
# Navigate to the new working tree
pushd ../.worktrees/opensearch-spark/backport-0.5
# Create a new branch
git switch --create backport/backport-676-to-0.5
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 a7fe6e644b750b1a07294b8104d0fc0ab67287c1
# Push it to GitHub
git push --set-upstream origin backport/backport-676-to-0.5
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/opensearch-spark/backport-0.5

Then, create a pull request where the base branch is 0.5 and the compare/head branch is backport/backport-676-to-0.5.