[jira] [Created] (FLINK-40968) Accept map() as op_mapping in Table API toChangelog() and fromChangelog()

["Timo Theusner (Jira)" <ji...@apache.org>]

Timo Theusner created FLINK-40968:
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             Summary: Accept map() as op_mapping in Table API toChangelog() and fromChangelog()
                 Key: FLINK-40968
                 URL: https://issues.apache.org/jira/browse/FLINK-40968
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / API
            Reporter: Timo Theusner
            Assignee: Timo Theusner


h2. Description

The documented Table API calls {{toChangelog(..., map(...).asArgument("op_mapping"))}} and {{fromChangelog(...)}} fail. TO_CHANGELOG with "must be a constant MAP literal", FROM_CHANGELOG with a {{{}NoSuchElementException{}}}. {{TableApiCallContext#isArgumentLiteral}} rejects {{map(...)}} calls, unlike SQL's {{{}MAP[...]{}}}, and both changelog type strategies treat a failed check as success when they must not throw. Both calls should behave like their SQL counterparts.
h2. Proposed Changes
 * Treat {{map(...)}} of non-null string literals as a constant in {{ResolveCallByArgumentsRule.TableApiCallContext#isArgumentLiteral}} and {{#getArgumentValue}}
 * Return error messages from the check helpers in {{FromChangelogTypeStrategy}} and {{ToChangelogTypeStrategy}} and call {{CallContext#fail}} once in {{validateInputs}}



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