Fix tests after session_timezone randomization

Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>

tests/queries/0_stateless/00387_use_client_time_zone.sh

@@ -5,4 +5,5 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 # shellcheck source=../shell_config.sh
 . "$CURDIR"/../shell_config.sh
 
-env TZ=UTC ${CLICKHOUSE_CLIENT} --use_client_time_zone=1 --query="SELECT toDateTime(1000000000)"
+# NOTE: session_timezone overrides use_client_time_zone, disable it randomization
+env TZ=UTC ${CLICKHOUSE_CLIENT} --session_timezone '' --use_client_time_zone=1 --query="SELECT toDateTime(1000000000)"

tests/queries/0_stateless/00427_alter_primary_key.sh

@@ -7,11 +7,12 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 function perform()
 {
     local query=$1
-    TZ=UTC $CLICKHOUSE_CLIENT \
+    local settings=(
-         --allow_deprecated_syntax_for_merge_tree=1 \
+        --allow_deprecated_syntax_for_merge_tree 1
-        --use_client_time_zone=1 \
+        --session_timezone UTC
-        --input_format_values_interpret_expressions=0 \
+        --input_format_values_interpret_expressions 0
-        --query "$query" 2>/dev/null
+    )
+    TZ=UTC $CLICKHOUSE_CLIENT "${settings[@]}" --query "$query" 2>/dev/null
     if [ "$?" -ne 0 ]; then
         echo "query failed"
     fi

tests/queries/0_stateless/00933_ttl_simple.sql

@@ -1,3 +1,15 @@
+-- disable timezone randomization since otherwise TTL may fail at particular datetime, i.e.:
+--
+--     SELECT
+--         now(),
+--         toDate(toTimeZone(now(), 'America/Mazatlan')),
+--         today()
+--
+--     ┌───────────────now()─┬─toDate(toTimeZone(now(), 'America/Mazatlan'))─┬────today()─┐
+--     │ 2023-07-24 06:24:06 │                                    2023-07-23 │ 2023-07-24 │
+--     └─────────────────────┴───────────────────────────────────────────────┴────────────┘
+set session_timezone = '';
+
 drop table if exists ttl_00933_1;
 
 -- Column TTL works only with wide parts, because it's very expensive to apply it for compact parts

tests/queries/0_stateless/01042_system_reload_dictionary_reloads_completely.sh

@@ -7,8 +7,8 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 
 set -e -o pipefail
 
-# Run the client.
+# NOTE: dictionaries TTLs works with server timezone, so session_timeout cannot be used
-$CLICKHOUSE_CLIENT --multiquery <<'EOF'
+$CLICKHOUSE_CLIENT --session_timezone '' --multiquery <<'EOF'
 DROP DATABASE IF EXISTS dictdb_01042;
 CREATE DATABASE dictdb_01042;
 CREATE TABLE dictdb_01042.table(x Int64, y Int64, insert_time DateTime) ENGINE = MergeTree ORDER BY tuple();

tests/queries/0_stateless/01070_modify_ttl_recalc_only.sql

@@ -2,6 +2,9 @@
 
 set mutations_sync = 2;
 
+-- system.parts has server default, timezone cannot be randomized
+set session_timezone = '';
+
 drop table if exists ttl;
 
 create table ttl (d Date, a Int) engine = MergeTree order by a partition by toDayOfMonth(d)

tests/queries/0_stateless/02530_dictionaries_update_field.sh

@@ -5,7 +5,8 @@ CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 # shellcheck source=../shell_config.sh
 . "$CUR_DIR"/../shell_config.sh
 
-$CLICKHOUSE_CLIENT -q "
+# NOTE: dictionaries will be updated according to server TZ, not session, so prohibit it's randomization
+$CLICKHOUSE_CLIENT --session_timezone '' -q "
     CREATE TABLE table_for_update_field_dictionary
     (
         key UInt64,