Panel of type table doesn't show all columns used in clickhouse query

[Hitesh Jha]

Bug description

while creating a panel of type table in the dashboards section, table doesn't show all columns used in clickhouse query, this happens specifically if the column datatype is integer or float, if we cast the value to string it works.

Expected behavior

all columns irrespective of their data type should show in table

How to reproduce

1. try this query in panel of type table, SELECT name as table_name, database, ((total_bytes/1024)/1024) as value FROM system.tables ORDER BY value DESC
2. the table will show only 2 columns
3. now if you cast the value to string it will work SELECT name as table_name, database, if(total_bytes>0,cast((total_bytes/1024)/1024, 'String'),'0') as value FROM system.tables ORDER BY value DESC

Version information

• Signoz version: 0.46.0
• Browser version: Version 126.0.6478.62 (Official Build) (arm64
• Your OS and version: macbook pro 14.2.1 (23C71
• Your CPU Architecture(ARM/Intel): ARM

Additional context

while checking the query service logs we get below stacktrace 5 to 6 times when executing the not working CH query
{ "level": "ERROR", "timestamp": "2024-06-20T17:31:21.968Z", "caller": "clickhouseReader/reader.go:4543", "msg": "unsupported var type found in query builder query result", "v": 124.10833358764648, "colName": "value", "stacktrace": "go.signoz.io/signoz/pkg/query-service/app/clickhouseReader.readRow\n\t/home/runner/work/signoz/signoz/pkg/query-service/app/clickhouseReader/reader.go:4543\ngo.signoz.io/signoz/pkg/query-service/app/clickhouseReader.readRowsForTimeSeriesResult\n\t/home/runner/work/signoz/signoz/pkg/query-service/app/clickhouseReader/reader.go:4584\ngo.signoz.io/signoz/pkg/query-service/app/clickhouseReader.(*ClickHouseReader).GetTimeSeriesResultV3\n\t/home/runner/work/signoz/signoz/pkg/query-service/app/clickhouseReader/reader.go:4660\ngo.signoz.io/signoz/pkg/query-service/app/querier/v2.(*querier).execClickHouseQuery\n\t/home/runner/work/signoz/signoz/pkg/query-service/app/querier/v2/querier.go:95\ngo.signoz.io/signoz/pkg/query-service/app/querier/v2.(*querier).runClickHouseQueries.func1\n\t/home/runner/work/signoz/signoz/pkg/query-service/app/querier/v2/querier.go:420" }

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