[Docs] add multi-table transform capability boundary guide#10985
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davidzollo merged 3 commits intoJun 13, 2026
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Clarify exactly what SeaTunnel's multi-table transform supports and does not support: - TableMerge vs SQL JOIN distinction - Cross-source JOIN limitation and workarounds - Per-table transform configuration pattern (table_match_regex) - Common-fields TableMerge pattern - EtLT recommended architecture - Capability boundary reference table - FAQ covering wildcard transforms, SQL JOIN, unmatched tables, and dynamic table addition Closes apache#10979 (P0-5)
davidzollo
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Purpose
Clarify exactly what SeaTunnel's multi-table transform layer supports and does not support.
This is a common source of user confusion and support questions.
Changes
docs/en/transforms/multi-table-transform-and-join-boundary.md(EN)docs/zh/transforms/multi-table-transform-and-join-boundary.md(ZH)docs/sidebars.jsto include the new page aftertransform-multi-tableCoverage
TableMergevs SQL JOIN distinction with clear examplestable_match_regexTableMergepattern (shared schema fan-in)Closes #10979 (P0-5)