fix(tsql): avoid polynomial backtracking in ORDER BY direction strip

Author: ericallam

internal-packages/tsql/src/query/printer.ts

@@ -647,7 +647,9 @@ export class ClickHousePrinter {
     // ORDER BY must be led by the timeBucket column (alias or full expression).
     // Don't fight a user ordering like `ORDER BY count DESC`.
     const leadTerm = orderBy[0];
-    const leadExpr = leadTerm.replace(/\s+(ASC|DESC)\s*$/i, "").trim();
+    // Trim first so the direction match is anchored without a trailing `\s*$`, which
+    // combined with the leading `\s+` would backtrack polynomially on all-whitespace input.
+    const leadExpr = leadTerm.trim().replace(/\s+(?:ASC|DESC)$/i, "");
     const matchesBucket = (expr: string): boolean =>
       expr.toLowerCase() === bucketAlias!.toLowerCase() || expr === bucketSql;
     if (!matchesBucket(leadExpr)) {