docs: concatenate and merge options for dataframe operations component

[mendonk]

Add the Concatenate and Merge options to the Table Operations component.

#11601

Summary by CodeRabbit

• Documentation
  • Added documentation for Concatenate operation to stack multiple tables vertically into a single output table
  • Added documentation for Merge operation to combine two tables by matching on a shared column with configurable merge type options

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Walkthrough

Documentation additions describing two new Table Operations: Concatenate for vertically stacking multiple Table inputs, and Merge for combining two Table objects by matching on a shared column. Changes applied to both current and versioned documentation files.

Changes

Cohort / File(s)	Summary
Documentation Updates docs/docs/Components/dataframe-operations.mdx, docs/versioned_docs/version-1.9.0/Components/dataframe-operations.mdx	Added two new Table Operations in tabbed parameters: Concatenate (stacking multiple Table inputs vertically) and Merge (combining two Table objects with column matching, including new parameters for left/right tables, merge column, and merge type).

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 8 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Excessive Mock Usage Warning	⚠️ Warning	Test file restore-dismissed-node.test.tsx contains 29 mocks for only 2 test cases, representing poor test design patterns inconsistent with other repository test files.	Refactor the test file to reduce mock usage, use real component implementations where feasible, and follow established mocking guidelines documented in .agents/skills/frontend-testing/references/mocking.md.

✅ Passed checks (8 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding documentation for concatenate and merge options to the dataframe operations component.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Test Coverage For New Implementations	✅ Passed	This PR is a documentation-only change that adds descriptions of existing Concatenate and Merge features to the Table Operations component documentation. The two modified files are .mdx documentation files with no code changes, no new components, and no new functionality being introduced. The features being documented already exist in the codebase with corresponding tests already in place.
Test Quality And Coverage	✅ Passed	Documentation-only PR for already-implemented Concatenate and Merge features with comprehensive existing test coverage of 13+ tests.
Test File Naming And Structure	✅ Passed	This PR is a documentation-only change modifying .mdx files for Concatenate and Merge operations; no test files are included or affected.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs-concatenate-and-merge-table-operations

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Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@docs/docs/Components/dataframe-operations.mdx`:
- Around line 157-160: Update the documentation text to clarify that
merge_on_column is optional (when empty the implementation falls back to an
index-based merge) and that merge_how controls retention of unmatched rows (use
inner for only matches, left/right to retain unmatched rows from the specified
side, and outer to retain unmatched rows from both); reference the merge
parameters merge_on_column and merge_how and mirror the actual behavior
implemented in dataframe_operations.py (the merge routine handling index-based
merges and left/right/outer semantics).

In `@docs/versioned_docs/version-1.9.0/Components/dataframe-operations.mdx`:
- Around line 157-160: The documentation incorrectly states merge only happens
on columns and that output contains only matched rows; update the wording for
merge_on_column and merge_how to describe that leaving merge_on_column empty
triggers an index-based merge and that merge_how governs whether unmatched rows
are retained (inner = only matched rows; left/right = keep all rows from
respective side including unmatched; outer = keep all rows from both sides), and
clarify the function/class that returns a Table with rows from both inputs
according to these rules (refer to merge_on_column and merge_how and the
dataframe_operations implementation that handles index-based merging).

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 9aae6de and 32b046e.

📒 Files selected for processing (2)

• docs/docs/Components/dataframe-operations.mdx
• docs/versioned_docs/version-1.9.0/Components/dataframe-operations.mdx

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