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help / color / mirror / Atom feedFrom: Sutou Kouhei <[email protected]>
Subject: [PATCH v21 05/10] Add support for implementing custom COPY TO format as extension
Date: Sat, 28 Sep 2024 23:59:34 +0900
* Add CopyToStateData::opaque that can be used to keep data for custom
COPY TO format implementation
* Export CopySendEndOfRow() to flush data in CopyToStateData::fe_msgbuf
as CopyToStateFlush()
---
src/backend/commands/copyto.c | 14 ++++++++++++++
src/include/commands/copyapi.h | 5 +++++
2 files changed, 19 insertions(+)
diff --git a/src/backend/commands/copyto.c b/src/backend/commands/copyto.c
index 37b150b44ba..c99edae575b 100644
--- a/src/backend/commands/copyto.c
+++ b/src/backend/commands/copyto.c
@@ -496,6 +496,20 @@ CopySendEndOfRow(CopyToState cstate)
resetStringInfo(fe_msgbuf);
}
+/*
+ * CopyToStateFlush
+ *
+ * Export CopySendEndOfRow() for extensions. We want to keep
+ * CopySendEndOfRow() as a static function for
+ * optimization. CopySendEndOfRow() calls in this file may be optimized by a
+ * compiler.
+ */
+void
+CopyToStateFlush(CopyToState cstate)
+{
+ CopySendEndOfRow(cstate);
+}
+
/*
* These functions do apply some data conversion
*/
diff --git a/src/include/commands/copyapi.h b/src/include/commands/copyapi.h
index 03779c15f43..30765951e2e 100644
--- a/src/include/commands/copyapi.h
+++ b/src/include/commands/copyapi.h
@@ -187,6 +187,11 @@ typedef struct CopyToStateData
FmgrInfo *out_functions; /* lookup info for output functions */
MemoryContext rowcontext; /* per-row evaluation context */
uint64 bytes_processed; /* number of bytes processed so far */
+
+ /* For custom format implementation */
+ void *opaque; /* private space */
} CopyToStateData;
+extern void CopyToStateFlush(CopyToState cstate);
+
#endif /* COPYAPI_H */
--
2.45.2
----Next_Part(Sun_Sep_29_00_56_45_2024_080)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline; filename="v21-0006-Add-CopyFromRoutine.patch"
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