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serprexserprex
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add note that 00 in day/month is mapped to 01 in clickhouse
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  • docs/integrations/data-ingestion/clickpipes/mysql

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‎docs/integrations/data-ingestion/clickpipes/mysql/datatypes.md‎

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@@ -6,26 +6,26 @@ description: 'Page describing MySQL ClickPipe datatype mapping from MySQL to Cli
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Here is the supported data-type mapping for the MySQL ClickPipe:
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| MySQL Type | ClickHouse type | Notes |
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| -------------------------------------------------------------------------- | ------------------------------------------ | -------------------------------------------------------------------------------------- |
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| Enum | LowCardinality(String) | |
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| Set | String | |
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| Decimal | Decimal | |
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| TinyInt | Int8 | Supports unsigned. |
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| SmallInt | Int16 | Supports unsigned. |
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| MediumInt, Int | Int32 | Supports unsigned. |
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| BigInt | Int64 | Supports unsigned. |
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| Year | Int16 | |
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| TinyText, Text, MediumText, LongText | String | |
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| TinyBlob, Blob, MediumBlob, LongBlob | String | |
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| Char, Varchar | String | |
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| Binary, VarBinary | String | |
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| TinyInt(1) | Bool | |
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| JSON | String | MySQL only; MariaDB `json` is just an alias for `text` with a constraint. |
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| Geometry & Geometry Types | String | WKT (Well-Known Text). WKT may suffer from small precision loss. |
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| Vector | Array(Float32) | MySQL only; MariaDB is adding support soon. |
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| Float | Float32 | Precision on ClickHouse may differ from MySQL during initial load due to text protocols. |
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| Double | Float64 | Precision on ClickHouse may differ from MySQL during initial load due to text protocols. |
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| Date | Date32 | |
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| Time | DateTime64(6) | The date portion is Unix epoch. |
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| Datetime, Timestamp | DateTime64(6) | |
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| MySQL Type | ClickHouse type | Notes |
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| --------------------------| -----------------------| -------------------------------------------------------------------------------------- |
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| Enum | LowCardinality(String) ||
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| Set | String ||
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| Decimal | Decimal ||
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| TinyInt | Int8 | Supports unsigned.|
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| SmallInt | Int16 | Supports unsigned.|
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| MediumInt, Int | Int32 | Supports unsigned.|
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| BigInt | Int64 | Supports unsigned.|
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| Year | Int16 ||
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| TinyText, Text, MediumText, LongText | String ||
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| TinyBlob, Blob, MediumBlob, LongBlob | String ||
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| Char, Varchar | String ||
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| Binary, VarBinary | String ||
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| TinyInt(1) | Bool ||
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| JSON | String | MySQL only; MariaDB `json` is just an alias for `text` with a constraint. |
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| Geometry & Geometry Types | String | WKT (Well-Known Text). WKT may suffer from small precision loss. |
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| Vector | Array(Float32) | MySQL only; MariaDB is adding support soon. |
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| Float | Float32 | Precision on ClickHouse may differ from MySQL during initial load due to text protocol.|
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| Double | Float64 | Precision on ClickHouse may differ from MySQL during initial load due to text protocol.|
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| Date | Date32 | 00 day/month mapped to 01.|
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| Time | DateTime64(6) | Time offset from unix epoch.|
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| Datetime, Timestamp | DateTime64(6) | 00 day/month mapped to 01.|

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