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

Function

PQclear is used to release the storage associated with PGresult. Any query result should be released by PQclear when it is no longer needed.

Prototype

void PQclear(PGresult *res);

Parameters

Table 1 PQclear parameter

Keyword

Parameter Description

res

Object pointer that contains the query result.

Precautions

PGresult is not automatically released. That is, it does not disappear when a new query is submitted or even if you close the connection. To delete it, you must call PQclear. Otherwise, memory leakage occurs.

Example

For details, see Typical Application Development Examples.