diff options
Diffstat (limited to 'src/backend/storage/buffer/localbuf.c')
| -rw-r--r-- | src/backend/storage/buffer/localbuf.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/src/backend/storage/buffer/localbuf.c b/src/backend/storage/buffer/localbuf.c index 98530078a6d..30d67d1c40d 100644 --- a/src/backend/storage/buffer/localbuf.c +++ b/src/backend/storage/buffer/localbuf.c @@ -20,7 +20,7 @@ #include "executor/instrument.h" #include "storage/buf_internals.h" #include "storage/bufmgr.h" -#include "utils/guc.h" +#include "utils/guc_hooks.h" #include "utils/memutils.h" #include "utils/resowner_private.h" @@ -484,6 +484,24 @@ InitLocalBuffers(void) } /* + * GUC check_hook for temp_buffers + */ +bool +check_temp_buffers(int *newval, void **extra, GucSource source) +{ + /* + * Once local buffers have been initialized, it's too late to change this. + * However, if this is only a test call, allow it. + */ + if (source != PGC_S_TEST && NLocBuffer && NLocBuffer != *newval) + { + GUC_check_errdetail("\"temp_buffers\" cannot be changed after any temporary tables have been accessed in the session."); + return false; + } + return true; +} + +/* * GetLocalBufferStorage - allocate memory for a local buffer * * The idea of this function is to aggregate our requests for storage |