Upgrade 11g server timezone to match Instant Client 21.15

Oracle 11g XE ships with DSTv14, while Instant Client 21.15 uses
v35. This mismatch causes ORA-01805 when fetching DATE/TIMESTAMP
values via ruby-oci8.

Copy the newer timezone files from Instant Client into the 11g
container and run DBMS_DST.begin_upgrade + upgrade_database +
end_upgrade to bring the server's timezone version up to match
the client.

See https://oracle-base.com/articles/misc/update-database-time-zone-file

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yahonda

.github/workflows/test_11g.yml

@@ -73,6 +73,51 @@ jobs:
     - name: Install JDBC Driver
       run: |
         wget -q https://download.oracle.com/otn-pub/otn_software/jdbc/233/ojdbc11.jar -O ./lib/ojdbc11.jar
+    - name: Upgrade Oracle 11g timezone file to match Instant Client
+      run: |
+        # Oracle 11g XE ships with DSTv14; Instant Client 21.15 uses v35.
+        # Copy newer timezone files into the 11g container and run DBMS_DST
+        # to upgrade the server so it matches the client.
+        ORACLE_CONTAINER=$(docker ps --filter "ancestor=gvenzl/oracle-xe:11" -q)
+        CLIENT_ZONEINFO=/opt/oracle/instantclient_21_15/oracore/zoneinfo
+        ls -la "$CLIENT_ZONEINFO" || ls -la /opt/oracle/instantclient_21_15/
+        # Copy newer timezone files from the Instant Client into the 11g container
+        for f in "$CLIENT_ZONEINFO"/timezlrg_*.dat "$CLIENT_ZONEINFO"/timezone_*.dat; do
+          [ -f "$f" ] || continue
+          docker cp "$f" "$ORACLE_CONTAINER":/u01/app/oracle/product/11.2.0/xe/oracore/zoneinfo/
+        done
+        docker exec "$ORACLE_CONTAINER" ls -la /u01/app/oracle/product/11.2.0/xe/oracore/zoneinfo/
+        # Run DBMS_DST to upgrade the database timezone version
+        sqlplus -S sys/${DATABASE_SYS_PASSWORD}@${DATABASE_NAME} as sysdba <<'SQL'
+        SET SERVEROUTPUT ON
+        SELECT version FROM v$timezone_file;
+        DECLARE
+          l_tz_version PLS_INTEGER;
+        BEGIN
+          l_tz_version := DBMS_DST.get_latest_timezone_version;
+          DBMS_OUTPUT.PUT_LINE('Latest timezone version available: ' || l_tz_version);
+          DBMS_DST.begin_prepare(l_tz_version);
+          DBMS_DST.end_prepare;
+          DBMS_DST.begin_upgrade(l_tz_version);
+        END;
+        /
+        SQL
+        # Restart the database to complete begin_upgrade
+        docker exec "$ORACLE_CONTAINER" bash -c 'echo "shutdown immediate;
+        startup;
+        exit" | sqlplus -S / as sysdba'
+        sqlplus -S sys/${DATABASE_SYS_PASSWORD}@${DATABASE_NAME} as sysdba <<'SQL'
+        SET SERVEROUTPUT ON
+        DECLARE
+          l_failures PLS_INTEGER;
+        BEGIN
+          DBMS_DST.upgrade_database(l_failures);
+          DBMS_DST.end_upgrade(l_failures);
+          DBMS_OUTPUT.PUT_LINE('Upgrade failures: ' || l_failures);
+        END;
+        /
+        SELECT version FROM v$timezone_file;
+        SQL
     - name: Create database user
       run: |
         ./ci/setup_accounts.sh