内部函数（二）

聚合操作内部函数

array_agg_finalfn	array_agg_transfn	bytea_string_agg_finalfn	bytea_string_agg_transfn	date_list_agg_noarg2_transfn	date_list_agg_transfn	float4_list_agg_noarg2_transfn
float4_list_agg_transfn	float8_list_agg_noarg2_transfn	float8_list_agg_transfn	int2_list_agg_noarg2_transfn	int2_list_agg_transfn	int4_list_agg_noarg2_transfn	int4_list_agg_transfn
int8_list_agg_noarg2_transfn	int8_list_agg_transfn	interval_list_agg_noarg2_transfn	interval_list_agg_transfn	list_agg_finalfn	list_agg_noarg2_transfn	list_agg_transfn
median_float8_finalfn	median_interval_finalfn	median_transfn	mode_final	numeric_list_agg_noarg2_transfn	numeric_list_agg_transfn	ordered_set_transition
percentile_cont_float8_final	percentile_cont_interval_final	string_agg_finalfn	string_agg_transfn	timestamp_list_agg_noarg2_transfn	timestamp_list_agg_transfn	timestamptz_list_agg_noarg2_transfn
timestamptz_list_agg_transfn	checksumtext_agg_transfn	-	-	-	-	-
json_agg_finalfn	json_agg_transfn	json_object_agg_finalfn	json_object_agg_transfn	-	-	-

哈希内部功能函数

hashbeginscan	hashbuild	hashbuildempty	hashbulkdelete	hashcostestimate	hashendscan	hashgetbitmap
hashgettuple	hashinsert	hashmarkpos	hashmerge	hashrescan	hashrestrpos	hashvacuumcleanup
hashvarlena	-	-	-	-	-	-

Btree索引内部功能函数

cbtreebuild	cbtreecanreturn	cbtreecostestimate	cbtreegetbitmap	cbtreegettuple	btbeginscan	btbuild
btbuildempty	btbulkdelete	btcanreturn	btcostestimate	btendscan	btfloat4sortsupport	btfloat8sortsupport
btgetbitmap	btgettuple	btinsert	btint2sortsupport	btint4sortsupport	btint8sortsupport	btmarkpos
btmerge	btnamesortsupport	btrescan	btrestrpos	bttextsortsupport	btvacuumcleanup	cbtreeoptions

GiST索引内部功能函数

gist_box_compress	gist_box_consistent	gist_box_decompress	gist_box_penalty	gist_box_picksplit	gist_box_same	gist_box_union
gist_circle_compress	gist_circle_consistent	gist_point_compress	gist_point_consistent	gist_point_distance	gist_poly_compress	gist_poly_consistent
gistbeginscan	gistbuild	gistbuildempty	gistbulkdelete	gistcostestimate	gistendscan	gistgetbitmap
gistinsert	gistmarkpos	gistmerge	gistrescan	gistrestrpos	gistvacuumcleanup	range_gist_compress
range_gist_decompress	range_gist_penalty	range_gist_picksplit	range_gist_same	range_gist_union	spg_kd_choose	spg_kd_config
spg_kd_picksplit	spg_quad_choose	spg_quad_config	spg_quad_inner_consistent	spg_quad_leaf_consistent	spg_quad_picksplit	spg_text_choose
spg_text_inner_consistent	spg_text_leaf_consistent	spg_text_picksplit	spgbeginscan	spgbuild	spgbuildempty	spgbulkdelete
spgcostestimate	spgendscan	spggetbitmap	spggettuple	spginsert	spgmarkpos	spgmerge
spgrestrpos	spgvacuumcleanup	-	-	-	-	-

Gin索引内部功能函数

gin_cmp_prefix	gin_extract_tsquery	gin_tsquery_consistent	gin_tsquery_triconsistent	ginarrayconsistent	ginarrayextract	ginarraytriconsistent
ginbeginscan	ginbuild	ginbuildempty	ginbulkdelete	gincostestimate	ginendscan	gingetbitmap
gininsert	ginmarkpos	ginmerge	ginqueryarrayextract	ginrescan	ginrestrpos	ginvacuumcleanup
cginbuild	cgingetbitmap	-	-	-	-	-
gin_compare_jsonb	gin_consistent_jsonb	gin_consistent_jsonb_hash	gin_extract_jsonbgin_extract_jsonb_hash	cginbuild	gin_extract_jsonb_query	gin_triconsistent_jsonb

Psort索引内部函数

psortbuild psortcanreturn psortcostestimate psortgetbitmap psortgettuple

Ubtree索引内部函数

ubtbeginscan	ubtbuild	ubtbuildempty	ubtbulkdelete	ubtcanreturn
ubtcostestimate	ubtendscan	ubtgetbitmap	ubtgettuple	ubtinsert
ubtmarkpos	ubtmerge	ubtoptions	ubtrescan	ubtrestrpos
ubtvacuumcleanup

集合相关内部函数

array_indexby_delete	array_indexby_length	array_integer_deleteidx	array_integer_exists	array_integer_first	array_integer_last
array_integer_next	array_integer_prior	array_varchar_deleteidx	array_varchar_exists	array_varchar_first	array_varchar_last
array_varchar_next	array_varchar_prior	-	-	-	-

外表相关内部函数

dist_fdw_handler roach_handler streaming_fdw_handler dist_fdw_validator file_fdw_handler file_fdw_validator log_fdw_handler
主数据库节点远程读取备数据库节点数据页辅助函数

gs_read_block_from_remote用于读取非段页式表文件的页面。默认只有初始化用户可以查看，其余用户需要赋权后才可以使用。

pg_read_binary_file_blocks用于读取数据，非压缩表返回实际数据，压缩表返回压缩后的数据。默认只有初始化用户可以查看，其余用户需要赋权后才可以使用。

gs_read_segment_block_from_remote用于读取段页式表文件的页面。默认只有初始化用户可以查看，其余用户需要赋权后才可以使用。
主数据库节点远程读取备数据库节点数据文件辅助函数

gs_read_file_from_remote用于读取指定的文件。gs_repair_file利用gs_read_file_size_from_remote函数获取文件大小后，依赖这个函数将远端文件逐段读取。默认只有初始化用户可以查看，其余用户需要赋权后才可以使用。

gs_read_file_size_from_remote用于读取指定文件的大小。用于读取指定文件的大小，gs_repair_file函数修复文件时，要先获取远端关于这个文件的大小，用于校验本地文件缺失的文件信息，然后将缺失的文件逐个修复。默认只有初始化用户可以查看，其余用户需要赋权后才可以使用。
账本数据库函数

get_dn_hist_relhash

AI特性函数

create_snapshot	create_snapshot_internal	prepare_snapshot_internal	prepare_snapshot	manage_snapshot_internal	archive_snapshot	publish_snapshot
purge_snapshot_internal	purge_snapshot	sample_snapshot

其他函数

to_tsvector_for_batch	value_of_percentile	disable_conn	bind_variable	job_update	job_cancel	job_finish
similar_escape	table_skewness （不可用）	timetz_text	time_text	reltime_text	abstime_text	_pg_keysequal
analyze_query(不可用）	analyze_workload （不可用）	ssign_table_type	gs_comm_proxy_thread_status	gs_txid_oldestxmin	pg_cancel_session	pg_stat_segment_space_info
remote_segment_space_info	set_cost_params	set_weight_params	start_collect_workload	tdigest_in	tdigest_merge	tdigest_merge_to_one
tdigest_mergep	tdigest_out	pg_get_delta_info	disable_conn	-	-	-