Issues

• Every query fails with Code 164 (READONLY) for a readonly = 1 user: the driver always sends enable_http_compression and input_format_binary_read_json_as_string as settings

  ClickHouse/clickhouse-cs#659 · Filter by author claude opened on Oct 7, 2026
  1

• HTTP: support typed Tuple/ValueTuple reads in GetFieldValue<T>, including tuples of more than 7 elements

  enhancement
  ClickHouse/clickhouse-cs#656 · Filter by author retvain opened on Oct 4, 2026

• TCP Dynamic: insert of an object[], nullable-element or System.Tuple composite fails with InvalidCastException instead of NotSupportedException

  bug
  ClickHouse/clickhouse-cs#652 · Filter by author polyglotAI-bot opened on Oct 1, 2026

• Dynamic: a collection that contains itself crashes the process with a stack overflow

  bug
  ClickHouse/clickhouse-cs#651 · Filter by author polyglotAI-bot opened on Oct 1, 2026

• ClickHouseDecimal: Floor() rounds negative non-integers toward zero (-1.5 → -1, server floor gives -2)

  bug
  ClickHouse/clickhouse-cs#645 · Filter by author polyglotAI-bot opened on Oct 1, 2026
  

• ClickHouseDecimal: GetHashCode depends on Scale, but Equals ignores Scale

  bug
  ClickHouse/clickhouse-cs#639 · Filter by author polyglotAI-bot opened on Oct 1, 2026

• Query parameters: ClickHouseDecimal values are inferred as Decimal128(9), so scale > 9 is silently truncated

  bug
  ClickHouse/clickhouse-cs#637 · Filter by author polyglotAI-bot opened on Oct 1, 2026
  

• Dynamic: preserve decimal collection precision during binary inserts

  bug
  ClickHouse/clickhouse-cs#636 · Filter by author alex-clickhouse opened on Oct 1, 2026
  

• JSON: a typed path wrapped in SimpleAggregateFunction is never unwrapped — composite values throw "The element cannot be an object or array", Array(UInt8) reads as base64

  bug
  ClickHouse/clickhouse-cs#627 · Filter by author polyglotAI-bot opened on Sep 25, 2026

• JSON: a path holding a Tuple (heterogeneous JSON array) throws "The element cannot be an object or array"; Dynamic(max_types=N) is an unknown type

  ClickHouse/clickhouse-cs#626 · Filter by author claude opened on Sep 25, 2026

• InsertBinaryAsync attaches the caller's InsertOptions.QueryId to the internal schema-probe SELECT instead of the INSERT

  ClickHouse/clickhouse-cs#624 · Filter by author claude opened on Sep 24, 2026

• Binary write: Date/Date32/DateTime/DateTime64 reject string values with a bare NotSupportedException, unlike every other scalar type

  ClickHouse/clickhouse-cs#614 · Filter by author claude opened on Sep 14, 2026

• InsertBinaryAsync / InsertRawStreamAsync concatenate the raw table name into SQL — names needing backquotes cannot be used

  ClickHouse/clickhouse-cs#602 · Filter by author claude opened on Aug 31, 2026

• ClickHouseRawResult.ReadAsStringAsync (and friends) should support cancellation

  enhancement
  ClickHouse/clickhouse-cs#546 · Filter by author otto-gebb opened on Aug 13, 2026

• Types: Object('json') column is parsed as SimpleAggregateFunction, so GetSchema("Columns") reports "SimpleAggregateFunction(, Json)"

  bug
  ClickHouse/clickhouse-cs#545 · Filter by author polyglotAI-bot opened on Aug 12, 2026

• JSON: reading a Dynamic/Variant-hinted path that holds an array throws InvalidOperationException; string values under a Dynamic hint are base64 under ReadStringsAsByteArrays

  bug
  ClickHouse/clickhouse-cs#530 · Filter by author polyglotAI-bot opened on Aug 6, 2026

• CustomHeaders: any HTTP content header throws InvalidOperationException ("Misused header name") instead of being applied or ignored

  bug
  ClickHouse/clickhouse-cs#528 · Filter by author polyglotAI-bot opened on Aug 6, 2026

• ClickHouseCommand: CommandBehavior matched by equality, so SchemaOnly/SingleRow combined with any other flag applies no row limit

  bug
  ClickHouse/clickhouse-cs#520 · Filter by author polyglotAI-bot opened on Aug 5, 2026
  

• GetDateTimeOffset() and GetSchemaTable() ignore LowCardinality/SimpleAggregateFunction wrappers: GetEffectiveClickHouseType only unwraps Nullable

  bug
  ClickHouse/clickhouse-cs#518 · Filter by author polyglotAI-bot opened on Aug 4, 2026

• GetDateTimeOffset returns the wrong instant for DST-ambiguous timestamps: it coerces from a wall-clock DateTime instead of reading the stored instant

  bugtriage:bugfix
  ClickHouse/clickhouse-cs#515 · Filter by author alex-clickhouse opened on Aug 4, 2026

• Reading SimpleAggregateFunction inside a Dynamic column throws NotImplementedException

  ClickHouse/clickhouse-cs#505 · Filter by author claude opened on Aug 3, 2026

• ReadStringsAsByteArrays breaks GetSchema("Columns") and GetString()

  ClickHouse/clickhouse-cs#486 · Filter by author alex-clickhouse opened on Jul 31, 2026

• ExecuteRawResultAsync / ClickHouseRawResult does not detect in-band mid-stream server exceptions

  ClickHouse/clickhouse-cs#475 · Filter by author claude opened on Jul 30, 2026

• Unable to rotate password without overriding internal HTTP infrastructure

  ClickHouse/clickhouse-cs#395 · Filter by author elviege opened on Jul 6, 2026

• Query parameters sent in URI by default cause HTTP 414 with large IN-lists / vector embeddings

  ClickHouse/clickhouse-cs#334 · Filter by author claude opened on May 15, 2026