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Commitff59d5d

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Provide feature-test macros for libpq features added in v17.
As per the policy established in commit6991e77, invent macrosthat can be tested at compile time to detect presence of new libpqfeatures. This should make calling code more readable and lesserror-prone than checking the libpq version would be (especiallysince we don't expose that at compile time; the server version isan unreliable substitute).Discussion:https://postgr.es/m/2042418.1724346970@sss.pgh.pa.us
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‎src/interfaces/libpq/libpq-fe.h‎

Lines changed: 18 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -30,15 +30,32 @@ extern "C"
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/*
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* These symbols may be used in compile-time #ifdef tests for the availability
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* of newer libpq features.
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* ofv14-and-newer libpq features.
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*/
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/* Features added in PostgreSQL v14: */
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/* Indicates presence of PQenterPipelineMode and friends */
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#defineLIBPQ_HAS_PIPELINING 1
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/* Indicates presence of PQsetTraceFlags; also new PQtrace output format */
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#defineLIBPQ_HAS_TRACE_FLAGS 1
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/* Features added in PostgreSQL v15: */
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/* Indicates that PQsslAttribute(NULL, "library") is useful */
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#defineLIBPQ_HAS_SSL_LIBRARY_DETECTION 1
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/* Features added in PostgreSQL v17: */
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/* Indicates presence of PGcancelConn typedef and associated routines */
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#defineLIBPQ_HAS_ASYNC_CANCEL 1
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/* Indicates presence of PQchangePassword */
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#defineLIBPQ_HAS_CHANGE_PASSWORD 1
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/* Indicates presence of PQsetChunkedRowsMode, PGRES_TUPLES_CHUNK */
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#defineLIBPQ_HAS_CHUNK_MODE 1
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/* Indicates presence of PQclosePrepared, PQclosePortal, etc */
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#defineLIBPQ_HAS_CLOSE_PREPARED 1
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/* Indicates presence of PQsendPipelineSync */
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#defineLIBPQ_HAS_SEND_PIPELINE_SYNC 1
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/* Indicates presence of PQsocketPoll, PQgetCurrentTimeUSec */
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#defineLIBPQ_HAS_SOCKET_POLL 1
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/*
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* Option flags for PQcopyResult
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*/

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