[fix](regression-test) fix two muted test cases (Groovy property access + flaky SHOW PROCESSLIST)

[morningman]

Summary

Fix two regression-test cases that are currently muted on branch-4.0 (and have the same bugs on master, just not yet observed/muted). Neither requires any FE/BE changes — both are Groovy / test-harness issues.

The companion back-port to branch-4.0 is #63644.

1. datatype_p0.create_table_with_nested_type

regression-test/plugins/plugins_create_table_nested_type.groovy:136,138

-    for (int i = 0; i < res.size; i++) {
+    for (int i = 0; i < res.size(); i++) {
         def date_type_str = ""
-        for (int j = 0; j < res[i].size; j++) {
+        for (int j = 0; j < res[i].size(); j++) {
             date_type_str += res[i][j] + " "
         }

On the Groovy runtime used by the regression framework, java.util.ArrayList does not expose size as a JavaBean property, so res.size falls through GPath into getAt(Iterable, ...), iterates the outer list, and tries to read .size from each inner Integer — throwing MissingPropertyException: No such property: size for class: java.lang.Integer. The test fails in ~15 ms before any DDL is sent to FE.

Same root cause as #62454 / #62455.

2. auth_call.test_show_charset_auth.test_show_no_auth

regression-test/suites/auth_call/test_show_charset_auth.groovy:68

-        assertTrue(res1.size() == 1)
+        def ownSessions = res1.findAll { it[2] == user }
+        assertTrue(ownSessions.size() >= 1)

After granting grant_priv, SHOW PROCESSLIST returns all sessions to any caller that satisfies PrivPredicate.ADMIN (see ConnectPoolMgr.listConnection), so in the parallel pipeline this user sees 20+ concurrent sessions from other suites. The == 1 assertion is structurally unsafe — replace it with a per-user filter that matches the same pattern already used at line 49 of the file. Column index 2 is the User column (ConnectContext.ThreadInfo.toRow).

Test plan

• After merge, unmute the two test cases on TeamCity (branch-4.0):
  • datatype_p0.nested_types.create_table.create_table_with_nested_type
  • auth_call.test_show_charset_auth.test_show_no_auth
• Confirm each test passes (or surfaces a different, real failure) on the next P0 run.

🤖 Generated with Claude Code

[hello-stephen]

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[morningman]

run buildall