What happened?

The parseDefaultExpression function is missing implementations for the following ClickHouse types:

• DateTime
• Array (including nested)
• Tuple
• Float32
• Float64
  This omission results in errors or unhandled cases when attempting to parse default expressions for these types.

Suggested Improvement:

Generalize the parseDefaultExpression function to handle any string-based conversion into the appropriate Java representation that ClickHouse expects. This would make the function more robust and capable of supporting future type additions without requiring frequent updates.

Steps to Reproduce:

Call the parseDefaultExpression function with a value and a column type that matches any of the unsupported types listed above.
Observe that the function either fails or returns an incorrect result.

Issue Priority

Priority: 2 (default / most bugs should be filed as P2)

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