Help Center/ GaussDB/ Developer Guide(Distributed_V2.0-2.x)/ Application Development Guide/ Development Based on libpq/ libpq API Reference/ Database Connection Control Functions/ PQconnectdb
Updated on 2025-08-19 GMT+08:00
View PDF

PQconnectdb

Description

Establishes a new connection with the database server.

Prototype

PGconn *PQconnectdb(const char *conninfo);

Parameter

Table 1 PQconnectdb parameter

Keyword

Description

conninfo

Connection string. For details about the fields in the string, see Connection Parameters.

Return Value

PGconn * points to the object pointer that contains a connection. The memory is applied for by the function internally.

Precautions

  • This function establishes a new database connection using the parameters taken from the string conninfo.
  • The input parameter can be empty, indicating that all default parameters can be used. It can also contain one or more parameters separated by spaces or it can contain a URL.

Example

For details, see Example.