Horton

20110110-ResetCopyFrom.patch

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Filename: 20110110-ResetCopyFrom.patch
Type: application/octet-stream
Part: 0
Message: Re: SQL/MED - file_fdw

Patch

Same data as JSON: GET /api/v1/attachments/:id/patch the parsed metadata as JSON — format, series position, per-file stats; never the diff bytes. API reference →
Format: unified
File+−
src/backend/commands/copy.c 0 0
src/include/commands/copy.h 0 0 
diff --git a/src/backend/commands/copy.c b/src/backend/commands/copy.c
index 00139b9..fab811a 100644
*** a/src/backend/commands/copy.c
--- b/src/backend/commands/copy.c
*************** NextCopyFrom(CopyState cstate, Datum *va
*** 2415,2420 ****
--- 2415,2448 ----
  }
  
  /*
+  * Reset read pointer to the head of the file.
+  * This can't be used for COPY FROM STDIN.
+  */
+ void
+ ResetCopyFrom(CopyState cstate)
+ {
+ 	/* stdin can't be rewinded */
+ 	Assert(cstate->copy_dest == COPY_FILE);
+ 
+ 	/* rewind seek pointer to the head */
+ 	if (fseek(cstate->copy_file, 0, SEEK_SET))
+ 		ereport(ERROR,
+ 				(errcode_for_file_access(),
+ 				 errmsg("could not seek in file \"%s\": %m",
+ 						cstate->filename)));
+ 	cstate->fe_eof = false;
+ 
+ 	/* reset error context */
+ 	cstate->cur_lineno = 0;
+ 	cstate->cur_attname = NULL;
+ 	cstate->cur_attval = NULL;
+ 
+ 	/* just clear the line buffer to avoid re-allocation */
+ 	resetStringInfo(&cstate->line_buf);
+ }
+ 
+ 
+ /*
   * Clean up storage and release resources for COPY FROM.
   */
  void
diff --git a/src/include/commands/copy.h b/src/include/commands/copy.h
index 8340e3d..424d170 100644
*** a/src/include/commands/copy.h
--- b/src/include/commands/copy.h
*************** extern CopyState BeginCopyFrom(Relation 
*** 28,33 ****
--- 28,34 ----
  extern void EndCopyFrom(CopyState cstate);
  extern bool NextCopyFrom(CopyState cstate,
  						 Datum *values, bool *nulls, Oid *tupleOid);
+ extern void ResetCopyFrom(CopyState cstate);
  extern void CopyFromErrorCallback(void *arg);
  
  extern DestReceiver *CreateCopyDestReceiver(void);