0. 准备CMake和LLVM编译环境依赖 升级LLVM和切换版本 在Ubuntu 16.04和18.04操作系统上,缺省的 apt 源用 apt install llvm 命令安装的版本较低。而 datasketches-postgresql 需要llvm-10的编译环境。考虑进一步升级 LLVM
postgres=# \d pg_stat_statements View"public.pg_stat_statements"Column|Type|Collation|Nullable|Default---+---+---+---+---userid|oid|||dbid|oid|||queryid|bigint|||query|text|||calls|bigint|||total_time|double precision|||min_time|double precision|||max_time|double precision|||mean...
make[2]: Nothing to be done for `generated-header-symlinks'.make[2]: Leaving directory `/opt/postgresql-12.1/src/backend/catalog'make -C utils distprep generated-header-symlinks make[2]: Entering directory `/opt/postgresql-12.1/src/backend/utils'make[2]: Nothing to be done for `distpr...
configure校验源码(debug模式),make编译后安装到系统,创建postgres用户/组后把编译文件目录都赋权给postgres,通常数据库跑在普通用户下的: # 清理make make clean # 检查环境,生成debug模式的makefile,-O0的目的是允许深度调试 CFLOAGS= -O0 /home/yzg/postgresql-14.5/configure --prefix=/usr/local/pgsql --en...
View"pg_catalog.pg_prepared_statements"Column|Type|Collation|Nullable|Default---+---+---+---+---name|text|||statement|text|||prepare_time|timestampwithtime zone|||parameter_types|regtype[]|||from_sql|boolean||| plan_cache_mode参数可以影响prepare语句选择生成执行计划的策略。 auto表示按照...
postgres=# \d pg_show_plansView"public.pg_show_plans"Column|Type|Collation|Nullable|Default---+---+---+---+---pid|bigint|||level|bigint|||userid|oid|||dbid|oid|||plan|text||| 模拟使用场景 1.开启两个session。 一个session执行...
GNU Make 3.82 Built for x86_64-redhat-linux-gnu Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. ...
Column|Type|Collation|Nullable|Default|Storage|Stats target|Description ---+---+---+---+---+---+---+--- f1|bigint|||plain|| f2|timestamp withouttimezone|||now()|plain|| f3|integer|||plain|| Partition key: RANGE(f2) Partitions: t_native_range...
id字段默认会取序列的值,且与id字段绑定 create table tf (id serial); postgres=# \d+ tf; Table "" Column | Type | Collation | Nullable | Default | Storage | Stats target | Description ---+---+---+---+---+---+---+--- id | integer | | not null | nextval('tf_id_seq':...
Column types may differ from those in the original PostgreSQL table. ClickHouse tries tocastvalues to the ClickHouse data types. Theexternal_table_functions_use_nullssetting defines how to handle Nullable columns. Default value: 1. If 0, the table function does not make Nullable columns and inser...