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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.