# 内部函数 GaussDB中下列函数使用了内部数据类型，用户无法直接调用，在此章节列出。 - 选择率计算函数 | areajoinsel | areasel | arraycontjoinsel | arraycontsel | contjoinsel | contsel | eqjoinsel | |---|---|---|---|---|---|---| | eqsel | iclikejoinsel | iclikesel | icnlikejoinsel | icnlikesel | icregexeqjoinsel | icregexeqsel | | icregexnejoinsel | icregexnesel | likejoinsel | likesel | neqjoinsel | neqsel | nlikejoinsel | | nlikesel | positionjoinsel | positionsel | regexeqjoinsel | regexeqsel | regexnejoinsel | regexnesel | | scalargtjoinsel | scalargtsel | scalarltjoinsel | scalarltsel | tsmatchjoinsel | tsmatchsel | - | - 统计信息收集函数 | array_typanalyze | range_typanalyze | ts_typanalyze | |---|---|---| | local_rto_stat | - | - | - 排序内部功能函数 | bpchar_sortsupport | bytea_sortsupport | date_sortsupport | numeric_sortsupport | timestamp_sortsupport | |---|---|---|---|---| - 内部类型处理函数 | abstimerecv | euc_jis_2004_to_utf8 | int2recv | line_recv | oidvectorrecv_extend | tidrecv | utf8_to_koi8u | |---|---|---|---|---|---|---| | anyarray_recv | euc_jp_to_mic | int2vectorrecv | lseg_recv | path_recv | time_recv | utf8_to_shift_jis_2004 | | array_recv | euc_jp_to_sjis | int4recv | macaddr_recv | pg_node_tree_recv | time_transform | utf8_to_sjis | | ascii_to_mic | euc_jp_to_utf8 | int8recv | mic_to_ascii | point_recv | timestamp_recv | utf8_to_uhc | | ascii_to_utf8 | euc_kr_to_mic | internal_out | mic_to_big5 | poly_recv | timestamp_transform | utf8_to_win | | big5_to_euc_tw | euc_kr_to_utf8 | interval_recv | mic_to_euc_cn | pound_nexttoken | timestamptz_recv | uuid_recv | | big5_to_mic | euc_tw_to_big5 | interval_transform | mic_to_euc_jp | prsd_nexttoken | timetz_recv | varbit_recv | | big5_to_utf8 | euc_tw_to_mic | iso_to_koi8r | mic_to_euc_kr | range_recv | tintervalrecv | varbit_transform | | bit_recv | euc_tw_to_utf8 | iso_to_mic | mic_to_euc_tw | rawrecv | tsqueryrecv | varchar_transform | | boolrecv | float4recv | iso_to_win1251 | mic_to_iso | record_recv | tsvectorrecv | varcharrecv | | box_recv | float8recv | iso_to_win866 | mic_to_koi8r | regclassrecv | txid_snapshot_recv | void_recv | | bpcharrecv | gb18030_to_utf8 | iso8859_1_to_utf8 | mic_to_latin1 | regconfigrecv | uhc_to_utf8 | win_to_utf8 | | btoidsortsupport | gbk_to_utf8 | iso8859_to_utf8 | mic_to_latin2 | regdictionaryrecv | unknownrecv | win1250_to_latin2 | | bytearecv | gin_extract_tsvector | johab_to_utf8 | mic_to_latin3 | regoperatorrecv | utf8_to_ascii | win1250_to_mic | | byteawithoutorderwithequalcolrecv | gtsvector_compress | json_recv | mic_to_latin4 | regoperrecv | utf8_to_big5 | win1251_to_iso | | cash_recv | gtsvector_consistent | koi8r_to_iso | mic_to_sjis | regprocedurerecv | utf8_to_euc_cn | win1251_to_koi8r | | charrecv | gtsvector_decompress | koi8r_to_mic | mic_to_win1250 | regprocrecv | utf8_to_euc_jis_2004 | win1251_to_mic | | cidr_recv | gtsvector_penalty | koi8r_to_utf8 | mic_to_win1251 | regtyperecv | utf8_to_euc_jp | win1251_to_win866 | | cidrecv | gtsvector_picksplit | koi8r_to_win1251 | mic_to_win866 | reltimerecv | utf8_to_euc_kr | win866_to_iso | | circle_recv | gtsvector_same | koi8r_to_win866 | namerecv | shift_jis_2004_to_euc_jis_2004 | utf8_to_euc_tw | win866_to_koi8r | | cstring_recv | gtsvector_union | koi8u_to_utf8 | ngram_nexttoken | shift_jis_2004_to_utf8 | utf8_to_gb18030 | win866_to_mic | | date_recv | hll_recv | latin1_to_mic | numeric_recv | sjis_to_euc_jp | utf8_to_gbk | win866_to_win1251 | | domain_recv | hll_trans_recv | latin2_to_mic | numeric_transform | sjis_to_mic | utf8_to_iso8859 | xidrecv | | euc_cn_to_mic | large_seq_upgrade_ntree | latin2_to_win1250 | nvarchar2recv | sjis_to_utf8 | utf8_to_iso8859_1 | xidrecv4 | | euc_cn_to_utf8 | inet_recv | latin3_to_mic | oidrecv | smalldatetime_recv | utf8_to_johab | xml_recv | | euc_jis_2004_to_shift_jis_2004 | int1recv | latin4_to_mic | oidvectorrecv | textrecv | utf8_to_koi8r | cstore_tid_out | | i16toi1 | int16 | int16_bool | int16eq | int16div | int16ge | int16gt | | int16in | int16le | int16lt | int16mi | int16mul | int16ne | int16out | | int16pl | int16recv | int16send | numeric_bool | int2vectorin_extend | int2vectorout_extend | int2vectorrecv_extend | | int2vectorsend_extend | tdigest_in | tdigest_merge | tdigest_merge_to_one | tdigest_mergep | tdigest_out | - | - 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 | - | - | - | - | - | - 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 | - 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 | - | - | - | - | - plpgsql内部函数 plpgsql_inline_handler - 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DN远程读取备DN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。 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DN远程读取备DN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。 - 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 | - | - | - | - | - PKG_SERVICE函数 | isubmit_on_nodes | submit_on_nodes | - | - | - | - | - | |---|---|---|---|---|---|---| - 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 | - | - | - | - | - 视图相关引用函数 adm_hist_sqlstat_func adm_hist_sqlstat_idlog_func