feat(copy): improve ColumnMissingError with contextual advice#20029
feat(copy): improve ColumnMissingError with contextual advice#20029youngsofun wants to merge 1 commit into
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Enhance error messages for missing columns during COPY INTO to help users diagnose and resolve issues faster: - Show the current MISSING_FIELD_AS setting - Indicate when a column is not nullable (for MISSING_FIELD_AS=NULL) - Suggest COLUMN_MATCH_MODE=CASE_INSENSITIVE when a case-different match exists in the source data - Suggest SELECT $1 pattern when target table has a single VARIANT column Applied consistently across NDJSON, Parquet, and ORC formats. The new advice field uses #[serde(default)] for rolling upgrade compatibility.
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Summary
fix: #18834
Enhance error messages for missing columns during COPY INTO to help users diagnose and resolve issues faster.
When a column is missing, the error now includes contextual advice:
MISSING_FIELD_ASsettingMISSING_FIELD_AS=NULLcase)COLUMN_MATCH_MODE=CASE_INSENSITIVEwhen a case-different match exists in the source dataCOPY INTO <table> FROM (SELECT $1 FROM @<stage>)when the target table has a single VARIANT columnApplied consistently across NDJSON, Parquet, and ORC formats.
Example before:
Example after:
Tests
Type of change
This change is