Examine these MySQL Shell statements: What is the true about the attempts to add document to the collection?

Question

Exhibit

Options

• AAll documents are added without any error or warning.
• BFirst three documents are added, then different number of fields cause an error.
• CFirst two documents are added, then mismatched field names cause an error.
• DFirst two documents are added, then mismatched field names cause a warning.
• EAll documents are added and cause a warning.

• A
  2% (1)
• B
  9% (5)
• C
  4% (2)
• D
  2% (1)
• E
  84% (46)

Explanation

MySQL Shell's X DevAPI document collections are schema-flexible by design - unlike relational tables, collections do not enforce a fixed structure across documents. When documents with different field counts or field names are inserted, MySQL does not reject them; instead, it may issue warnings to alert the user about structural inconsistencies, but all insertions still complete successfully.

Why the distractors fail:

• A is wrong because warnings are generated - the operation isn't entirely clean.
• B is wrong because differing field counts do not cause errors; schema flexibility explicitly permits this.
• C is wrong because mismatched field names also do not cause errors in a document collection - they are valid JSON variations.
• D is closest but still wrong: it incorrectly implies that only the first two documents are added, when in reality all documents are inserted regardless of the warning.

Memory tip: Think of MySQL document collections as "warning-friendly, error-tolerant." The mantra is: warnings warn, but don't block. If you see schema differences in a collection context, map it to a warning - not a stop sign. Errors in MySQL Shell document operations are reserved for syntax failures or constraint violations, not structural variation between documents.

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