From b52208e7f5292bcff38c353fbf1bba48a1f429d8 Mon Sep 17 00:00:00 2001 From: Sutou Kouhei Date: Mon, 25 Nov 2024 14:21:39 +0900 Subject: [PATCH v29 8/9] Add support for implementing custom COPY FROM format as extension * Add CopyFromStateData::opaque that can be used to keep data for custom COPY From format implementation * Export CopyGetData() to get the next data as CopyFromStateGetData() --- src/backend/commands/copyfromparse.c | 11 +++++++++++ src/include/commands/copyapi.h | 2 ++ src/include/commands/copyfrom_internal.h | 3 +++ 3 files changed, 16 insertions(+) diff --git a/src/backend/commands/copyfromparse.c b/src/backend/commands/copyfromparse.c index f7982bf692f..650b6b2382b 100644 --- a/src/backend/commands/copyfromparse.c +++ b/src/backend/commands/copyfromparse.c @@ -729,6 +729,17 @@ CopyReadBinaryData(CopyFromState cstate, char *dest, int nbytes) return copied_bytes; } +/* + * Export CopyGetData() for extensions. We want to keep CopyGetData() as a + * static function for optimization. CopyGetData() calls in this file may be + * optimized by a compiler. + */ +int +CopyFromStateGetData(CopyFromState cstate, void *dest, int minread, int maxread) +{ + return CopyGetData(cstate, dest, minread, maxread); +} + /* * Read raw fields in the next line for COPY FROM in text or csv mode. * Return false if no more lines. diff --git a/src/include/commands/copyapi.h b/src/include/commands/copyapi.h index bf933069fea..d1a1dbeb178 100644 --- a/src/include/commands/copyapi.h +++ b/src/include/commands/copyapi.h @@ -105,4 +105,6 @@ typedef struct CopyFromRoutine void (*CopyFromEnd) (CopyFromState cstate); } CopyFromRoutine; +extern int CopyFromStateGetData(CopyFromState cstate, void *dest, int minread, int maxread); + #endif /* COPYAPI_H */ diff --git a/src/include/commands/copyfrom_internal.h b/src/include/commands/copyfrom_internal.h index 3743b11faa4..a65bbbc962e 100644 --- a/src/include/commands/copyfrom_internal.h +++ b/src/include/commands/copyfrom_internal.h @@ -181,6 +181,9 @@ typedef struct CopyFromStateData #define RAW_BUF_BYTES(cstate) ((cstate)->raw_buf_len - (cstate)->raw_buf_index) uint64 bytes_processed; /* number of bytes processed so far */ + + /* For custom format implementation */ + void *opaque; /* private space */ } CopyFromStateData; extern void ReceiveCopyBegin(CopyFromState cstate); -- 2.47.1