Connecting to PostgreSQL

Prerequisites

• The PostgreSQL instance is accessible over the network from the PuppyGraph instance.

Configuration

Configuration	Explanation
Catalog name	A customized name assigned to the PostgreSQL connection. It is used internally by PuppyGraph and will be referenced later when building the graph schema.
Username	The username used to connect to the PostgreSQL database.
Password	The password associated with the database user account.
JDBC Connection String	A JDBC-compliant URI used to connect to the PostgreSQL database. See the JDBC documentation for syntax and examples.
Driver Class	The fully qualified class name of the PostgreSQL JDBC driver. Default: org.postgresql.Driver
Caching JDBC Metadata	Whether to cache JDBC metadata (e.g., table schemas) to improve performance.
JDBC Metadata Cache TTL (seconds)	The time-to-live (TTL) for cached JDBC metadata, in seconds. After this period, the metadata will be refreshed.

Data Type Mapping

PostgreSQL Type	PuppyGraph Type	Explanation
boolean	Boolean	Boolean value: true or false
smallint	Short	16-bit signed integer
integer	Int	32-bit signed integer
bigint	Long	64-bit signed integer
real	Float	32-bit single-precision floating point (IEEE 754)
double precision	Double	64-bit double-precision floating point (IEEE 754)
numeric(P, S) / decimal(P, S)	Decimal(P, S)	Exact fixed-point number with precision P and scale S
text / varchar	String	Variable-length UTF-8 encoded string
date	Date	Calendar date (year, month, day), no time or timezone
timestamp	DateTime	Date and time with microsecond precision, no timezone

Tutorials

See Querying PostgreSQL Data as a Graph for a complete demo for PostgreSQL. The demo includes setting up the connection to a PostgreSQL database instance.