Help Center/ GaussDB/ Developer Guide(Centralized_V2.0-2.x)/ Application Development Guide/ Development Based on libpq/ libpq API Reference/ Functions for Processing Database Result/ PQnfields
Updated on 2025-08-19 GMT+08:00
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PQnfields

Description

Returns the number of columns (fields) in each row of the query result.

Prototype

int PQnfields(const PGresult *res);

Parameter

Table 1 PQnfields parameters

Keyword

Description

res

Operation result handle.

Return Value

Value of the int type

Example

For details, see Typical Application Development Examples.