Data Types

Using supported data types

Source tables may be synced to a number of different destination databases or data warehouses. While many databases represent most data types the same, there are a number of differences across naming conventions. Therefore, as part of the Prequel configuration, each destination column must be manually typed with one of the PREQUEL types below so that the table can be per destination with the right data type.

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Using the following PREQUEL type maps
The PREQUEL type used during configuration is used for two purposes:

Specifying the source type during source and data model configuration. To determine the right PREQUEL type to write in your config, use the "Source type mapping" table.

Predicting the destination type based on the connected destination. To predict the data type that will be loaded into a given destination, use the "Destination type mapping".

Source type mapping

If you are configuring your source and need to decide what PREQUEL type to use, reference this table.

Prequel Type	Supported	Athena	BigQuery	Clickhouse	Databricks	MySQL	Postgres	Redshift	Snowflake	SQL Server
`bytes`	✔️	binary	bytes	blob, mediumblob, longblob	binary	binary, varbinary, blob, mediumblob, longblob	bytea	VARBYTE, VARBINARY, BINARY VARYING	binary, varbinary	binary, image, varbinary
`string`	✔️	char, varchar, string	string	string, fixedstring, text, mediumtext, longtext, varchar	string	string, char, text, longtext, varchar	char, character, character varying, text, uuid, varchar	CHAR, CHARACTER, NCHAR, BPCHAR, CHARACTER VARYING, NVARCHAR, TEXT	CHAR, CHARACTER, NCHAR, BPCHAR, CHARACTER VARYING, NVARCHAR, TEXT	char, varchar, text, nvarchar, ntext, nchar
`boolean`	✔️	boolean	bool	bool, boolean	boolean	boolean	boolean	boolean	boolean	bit
`integer`	✔️	smallint, integer	smallint, int64, bigint	int, int8, int16, int32	smallint, int	smallint, mediumint, int	smallint, integer	smallint, integer	smallint, integer	smallint, int
`bigint`	✔️	bigint	int64, bigint	int64, bigint	bigint	bigint	bigint	bigint	bigint	bigint
`decimal`	✔️	decimal	decimal, numeric	decimal, numeric	decimal, dec, numeric	decimal, numeric	decimal, numeric	decimal, numeric	decimal, numeric	decimal, numeric
`float`	✔️	real, float	float64	float32, float64, double	float, double	float, double	real, double precision	real, float4, float8, double precision	real, float4, float8, double precision	float, real
`timestamp`	✔️	timestamp	timestamp	datetime, Datetime64	timestamp	timestamp, datetime	timestamp, timestamptz	timestamp, timestamptz	timestamp, timestamp_ntz, timestamp_tz, timestamp_ltz	datetime2
`date`	✔️	date	date	date	date	date	date	date	date	date
`json`	✔️	varchar, string	json	string*	string	json	json, jsonb	varchar(MAX)	varchar, variant	nvarchar(MAX)
`time`*	✖️	varchar, string	time	time	string	time	time	time	time	time

* An asterisk indicates partial support. Ask us about any specific data type limitations.

Destination type mapping

If you are predicting what data type your destination will receive, reference this table.

Prequel Type	Supported	Athena	BigQuery	Clickhouse	Databricks	MySQL	Postgres	Redshift	Snowflake	SQL Server
`bytes`	✔️	string	bytes	blob	binary	binary	bytea	VARBYTE(MAX)*	binary	blob
`string`	✔️	string	string	string	string	text	text	varchar(MAX)	text	nvarchar(MAX)
`boolean`	✔️	boolean	bool	boolean	boolean	boolean	boolean	boolean	boolean	bit
`integer`	✔️	integer	int64	integer	int	int	integer	bigint	integer	int
`bigint`	✔️	bigint	bigint	bigint	bigint	bigint	bigint	bigint	bigint	bigint
`decimal`	✔️	decimal	decimal	decimal	decimal	decimal	decimal	decimal	decimal	decimal
`float`	✔️	float	float64	double	double	double	double precision	double precision		float
`timestamp`	✔️	timestamp	timestamp	Datetime64	timestamp	timestamp	timestamptz	timestamptz	timestamp_tz	datetime2
`date`	✔️	date	date	date	date	date	date	date	date	date
`json`	✔️	string	json*	string*	string	json	jsonb	varchar(MAX)	variant	nvarchar(MAX)

* An asterisk indicates partial or incomplete support. Ask us about any specific data type limitations.

Using supported data types

📘Using the following PREQUEL type maps

Source type mapping

Destination type mapping

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Using the following `PREQUEL` type maps