ganeshashree opened a new pull request, #58113:
URL: https://github.com/apache/spark/pull/58113
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### What changes were proposed in this pull request?
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When the JDBC data source reads a column whose SQL type it cannot map to a
Catalyst type, it fails with the `UNRECOGNIZED_SQL_TYPE` error. This PR appends
a remediation hint to that error condition (in
common/utils/src/main/resources/error/error-conditions.json), pointing users at
the two supported ways to handle an unmapped type:
`Unrecognized SQL type - name: <typeName>, id: <jdbcType>.`
To read this column, map it explicitly with the `customSchema` option, or
register a custom `JdbcDialect` that handles this type. Only the message text
of the `UNRECOGNIZED_SQL_TYPE` condition changes; the error class, condition
name, SQL state (42704), and message parameters are untouched.
### Why are the changes needed?
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The existing message states what failed but not what to do about it.
`UNRECOGNIZED_SQL_TYPE` is thrown only from the JDBC read path
(`JdbcUtils.getCatalystType`), and both remedies already exist: the
`customSchema` read option and a user-registered `JdbcDialect`. Surfacing them
lets users self-serve unmapped or vendor-specific types instead of reading
source or filing a support request.
### Does this PR introduce _any_ user-facing change?
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Yes. The `UNRECOGNIZED_SQL_TYPE` error message now includes a second
sentence with remediation guidance. There is no change to the error class,
condition, SQL state, parameters, or behavior; only the human-readable text
changes.
### How was this patch tested?
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No new tests are needed. Existing coverage (QueryExecutionErrorsSuite -
"`UNRECOGNIZED_SQL_TYPE: unrecognized SQL type DATALINK`", and JDBCSuite)
asserts on the error condition and its parameters via checkError, not on
literal message text, so it continues to pass. docs/sql-error-conditions.md is
generated from error-conditions.json at doc-build time, so no golden file needs
regenerating. The JSON was validated as well-formed.
### Was this patch authored or co-authored using generative AI tooling?
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Generated-by: Claude Code (Opus 4.8)
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