# Macros named *_MAX_* or *_LIMIT* that are not limits a user can reach, so they have no row in SIFT_LIMITS (src/core/limits.h).
# NAME, a tab, the reason. scripts/gen-limits.sh --check fails for a macro that is neither here nor a row, and for a line whose macro is gone.
# A bound that a user can reach gets a row, not a line here.
DENSE_MAX_CLASSES	the tuples of column values a dense lookup table tells apart (agg/lookcol.c): past it the table is hashed row by row and the rows are the same
ARR_MAX_CANDS	array columns whose elements the default of paths samples: a memory bound of the sample (128 MB of sets), the others keep their image
CHUNK_MAX_N	sanity bound on the row count a decoder reads from a chunk: a corruption check
COL_MAX_WIDE	array size that mirrors wide_conjuncts (SIFT_AGG_MAX_WIDE)
ESTIMATE_MEMO_MAX_KEY	size of the key of a planner memo: an internal cache bound with no visible effect
INLINE_JOIN_LIMIT	width of the join-order search of the inline plan of a shared CTE: a planning-cost choice with no visible limit (the plan differs, the rows do not)
MERGE_MAX_BYTES	no caller left: delete it in a cleanup
ORDER_MAX_ROWS	the most rows of a key-cut unit, the maximum of key_cut_rows (the directory of a unit is read with the head of its record)
PAGG_MAX_TUPLES	decoder bound for a rollup blob (a corruption check), derived from rollup_tuples
POOL_MAX_BLOCKS	size of the CREATE INDEX buffer pool, kept so that addresses stay below 2^32 (sift.test_pool_blocks lowers it)
PROBE_MAX_ENTRIES	size of the table of one planner probe: an internal bound with no visible effect
RANK_MAX_ROWS	most rows the SiftSort node ranks in memory: more go to the tuplesort, as a Sort sorts them (the rows are the same, the packed rank keys of 40 million rows are 320 MB)
SIFT_AGG_MAX_PARAMS	derived array size of the executor parameters
SIFT_ALLOC_MAX_LOCKED	invariant of the block allocator, not reachable by valid input
SIFT_COLSTUB_MAX_STR	test-only stub source (SIFT_TESTING)
SIFT_COL_FORMAT_MAX_READ	the newest column format minor this build reads: a version, not a size
SIFT_COL_MAX_LANES	array size of the lanes of one numeric leaf
SIFT_CORDER_MAX_KEYS	an IN list of more keys than this is read from the units: each key seeks a chunk of the sorted keys of its own
SIFT_CORDER_MAX_ROWS	a range of more rows than this is read from the units: the addresses of a range are sorted by position before the heap is read
SIFT_CPOINT_MAX_KEYS	keys of one lookup that the point directory answers: a speed threshold, the answer is the same either way
SIFT_CPOINT_MAX_RANGE	keys of one range that the point directory enumerates: a speed threshold, the zones answer a longer range the same way
SIFT_CPOINT_MAX_ROWS	rows of one lookup that the point directory answers: a speed threshold, the answer is the same either way
SIFT_FOLD_MAX_EXPAND	characters one character expands to in case folding: a property of the Unicode tables
SIFT_MAX_EXTENTS	derived from the page layout (extents of a segment header)
SIFT_MAX_OFF	width of a page bitmap: the layout of the postings
SIFT_MAX_OFFSET	MaxHeapTuplesPerPage, a PostgreSQL bound
SIFT_MAX_REBINDS	size of the table of kernel rebind callbacks
SIFT_MAX_W	words of a page bitmap: the layout of the postings
SIFT_MERGE_MAX_FANIN	merge policy: segments one merge reads at a time
SIFT_MERGE_MAX_SEGMENTS	merge policy: more directory entries than this start a merge
SIFT_NUM_MAX_DIGITS	the same limit as wide_digits, counted by the planner
SIFT_RADIX_MAX_DIGIT	bits of the widest digit of the radix sort of core/cmp.h: the counters of a digit (4 KB) and the cache lines its pass writes to; the order of the result does not depend on it
SIFT_SRC_MAX_DIMS	planner-side array size of the dimensions of a source, above cube_dims
SIFT_SRC_MAX_MEAS	planner-side array size that mirrors cube_measures
SIFT_SRC_MAX_RDIMS	planner-side array size that mirrors rollup_dims
SIFT_SRC_MAX_ROLLUPS	planner-side array size that mirrors rollups
SIFT_TBL_MAX_OFF	MaxHeapTuplesPerPage, a PostgreSQL bound
SIFT_TBL_MAX_WBUF_PAGES	array size of the page list of one write buffer: see write_buffer_kb and tx_write_buffers
SIFT_TBL_ROW_MAX_INLINE	a sift_table row above half a page goes to overflow pages: a layout threshold, not a limit
SIFT_KTAB_MAX_GROUPS	the keys of a leaf in a segment beyond which the accumulator of its key table stops: a memory bound, a table that large takes more than 3% of any segment
SIFT_VK_MAX_GROUPS	shader job layout of the opt-in Vulkan backend
SIFT_VK_MAX_PRED	shader job layout of the opt-in Vulkan backend
SIFT_VK_MAX_RS	shader job layout of the opt-in Vulkan backend
SIFT_VK_MAX_SLOTS	shader job layout of the opt-in Vulkan backend
SIFT_VK_MAX_SUM	shader job layout of the opt-in Vulkan backend
SIFT_VK_MAX_UNITS	shader job layout of the opt-in Vulkan backend
VK_MAX_MEMORY_HEAPS	constant of the Vulkan API
VK_MAX_MEMORY_TYPES	constant of the Vulkan API
VK_MAX_PHYSICAL_DEVICE_NAME_SIZE	constant of the Vulkan API
VSHM_MAX_SETS	the array of the shared verdict table, which sift.verdict_cache_kb (up to 1 MB) fills in part
CAL_MAX_CUTS	the most clock changes of the session zone the prefilter of a periodic calendar step splits its windows at (a span of several centuries); more and the step is tested by the expression, no result changes
LOAD_MAX_GROUPS	groups a bulk load writes at once: the backend and three workers, bounded by max_parallel_maintenance_workers and maintenance_work_mem
LOAD_MAX_UNITS	array size of the units of a run: LOAD_SBS for each of LOAD_MAX_GROUPS
DP_MAX_LEVELS	size of the array of the pages of one descent: a btree is never as deep, the probe falls back to the index scan when it is
DP_MAX_PEND	keys of a chunk the direct probe holds before it flushes them: a memory bound of the batch with no visible effect
JSTR_MAX_KEYS	a text join key list longer than this, or than a sixteenth of the table's rows, is left to the join: a speed threshold, the rows are the same either way
SIFT_CONN_MAX_CONNECTIONS	connections one connect option names: a syntax bound of the option text, rejected with an error
FOUND_MAX_KEYS	keys the journal of a parent may name for a join answered from the found flag (agg/found.c): past it the join loads the parent, the rows are the same
FOUND_MAX_PROBES	keys deleted or changed in a parent that a join answered from the found flag probes in its btree (agg/found.c): past it the join loads the parent, the rows are the same