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Merge pull request #115184 from kevinvngo/patch-162
Updated type mapping column
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‎articles/synapse-analytics/sql-data-warehouse/design-elt-data-loading.md

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@@ -7,7 +7,7 @@ manager: craigg
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ms.service: synapse-analytics
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ms.topic: conceptual
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ms.subservice:
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ms.date: 02/19/2020
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ms.date: 05/13/2020
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ms.author: kevin
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ms.reviewer: igorstan
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ms.custom: azure-synapse
@@ -83,30 +83,43 @@ Defining external tables involves specifying the data source, the format of the
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When loading Parquet, the SQL data type mapping is:
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| **Parquet Data Type** | **SQL Data Type** |
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| :-------------------: | :---------------: |
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| tinyint | tinyint |
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| smallint | smallint |
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| int | int |
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| bigint | bigint |
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| boolean | bit |
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| double | float |
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| float | real |
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| double | money |
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| double | smallmoney |
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| string | nchar |
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| string | nvarchar |
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| string | char |
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| string | varchar |
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| binary | binary |
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| binary | varbinary |
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| timestamp | date |
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| timestamp | smalldatetime |
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| timestamp | datetime2 |
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| timestamp | datetime |
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| timestamp | time |
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| date | date |
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| decimal | decimal |
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| Parquet type | Parquet logical type (annotation) | SQL data type |
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| :----------------------------------------------------------: | :-----------------------------------: | :--------------: |
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| BOOLEAN | | bit |
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| BINARY / BYTE_ARRAY | | varbinary |
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| DOUBLE | | float |
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| FLOAT | | real |
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| INT32 | | int |
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| INT64 | | bigint |
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| INT96 | | datetime2 |
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| FIXED_LEN_BYTE_ARRAY | | binary |
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| BINARY | UTF8 | nvarchar |
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| BINARY | STRING | nvarchar |
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| BINARY | ENUM | nvarchar |
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| BINARY | UUID | uniqueidentifier |
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| BINARY | DECIMAL | decimal |
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| BINARY | JSON | nvarchar(MAX) |
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| BINARY | BSON | varbinary(max) |
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| FIXED_LEN_BYTE_ARRAY | DECIMAL | decimal |
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| BYTE_ARRAY | INTERVAL | varchar(max), |
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| INT32 | INT(8, true) | smallint |
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| INT32 | INT(16, true) | smallint |
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| INT32 | INT(32, true) | int |
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| INT32 | INT(8, false) | tinyint |
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| INT32 | INT(16, false) | int |
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| INT32 | INT(32, false) | bigint |
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| INT32 | DATE | date |
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| INT32 | DECIMAL | decimal |
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| INT32 | TIME (MILLIS ) | time |
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| INT64 | INT(64, true) | bigint |
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| INT64 | INT(64, false ) | decimal(20,0) |
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| INT64 | DECIMAL | decimal |
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| INT64 | TIME (MICROS / NANOS) | time |
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| INT64 | TIMESTAMP (MILLIS / MICROS / NANOS) | datetime2 |
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| [Complex type](https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fapache%2Fparquet-format%2Fblob%2Fmaster%2FLogicalTypes.md%23lists&data=02\|01\|kevin%40microsoft.com\|19f74d93f5ca45a6b73c08d7d7f5f111\|72f988bf86f141af91ab2d7cd011db47\|1\|0\|637215323617803168&sdata=6Luk047sK26ijTzfvKMYc%2FNu%2Fz0AlLCX8lKKTI%2F8B5o%3D&reserved=0) | LIST | varchar(max) |
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| [Complex type](https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fapache%2Fparquet-format%2Fblob%2Fmaster%2FLogicalTypes.md%23maps&data=02\|01\|kevin%40microsoft.com\|19f74d93f5ca45a6b73c08d7d7f5f111\|72f988bf86f141af91ab2d7cd011db47\|1\|0\|637215323617803168&sdata=FiThqXxjgmZBVRyigHzfh5V7Z%2BPZHjud2IkUUM43I7o%3D&reserved=0) | MAP | varchar(max) |
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For an example of creating external objects, see the [Create external tables](load-data-from-azure-blob-storage-using-polybase.md#create-external-tables-for-the-sample-data) step in the loading tutorial.
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