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fix: string-to-timestamp does not trim ISO control characters, and leading '+' returns null under ANSI - #5172

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peterxcli wants to merge 4 commits into

apache:mainfrom

peterxcli:fix/string-to-timestamp-not-trim-and-correct-leading-plus-sign

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fix: string-to-timestamp does not trim ISO control characters, and leading '+' returns null under ANSI#5172
peterxcli wants to merge 4 commits into
apache:mainfrom
peterxcli:fix/string-to-timestamp-not-trim-and-correct-leading-plus-sign

Commits on Jul 29, 2026
- perf: classify string-to-timestamp shapes with one byte scan instead of double regex matching
  andygrove
  committed
  46cee87
- docs: record the string-to-timestamp performance tuning in the cast expression audit
  andygrove
  committed
  aa38e34
Commits on Jul 31, 2026
- test: port Spark's string-to-timestamp cases; fold regexes onto TimestampPattern
  andygrove
  committed
  e14e086
- fix: align string-to-timestamp parsing with Spark
  peterxcli
  committed
  2598344