Foreign-key constraints: "t2_b_fkey" FOREIGN KEY (b) REFERENCES t1(a) postgres=# 假设我们想通过脚本向表中加载一些数据。因为我们不知道脚本中加载的顺序,我们决定将表t2上的外键约束禁用掉,在数据加载之后载开启外键约束: 1 2 3 postgres=# alter table t2 disable trigger all; ALTER TABLE postgres...
在 VSCode 中都是集成好的，比如 JavaScript 的智能提示、高亮显示已选同名单词等。
DISABLE/ENABLE [ REPLICA | ALWAYS ] TRIGGER These forms configure the firing of trigger(s) belonging to the table. A disabled trigger is still known to the system, but is not executed when its triggering event occurs. For a deferred trigger, the enable status is checked when the event occu...
=xxxx-- privileges granted to PUBLICr-- SELECT ("read")w-- UPDATE ("write")a-- INSERT ("append")d-- DELETED-- TRUNCATEx-- REFERENCESt-- TRIGGERX-- EXECUTEU-- USAGEC-- CREATEc-- CONNECTT-- TEMPORARYarwdDxt-- ALL PRIVILEGES (for tables, varies for other objects)*-- grant option...
1. postgresql 获取建表信息 CREATE OR REPLACE FUNCTION tabledef(text,text) RETURNS text LANGUAGE sql STRICT AS $$ WITH attrdef AS ( SELECT n.nspname, c.relname, c.oid, pg_catalog.array_to_string(c.reloptions || array(select 'toast.' || x from pg_catalog.unnest(tc.reloptions) x),...
->{CONSTRAINTS}}, ($constraint); } } elsif (defined$sqlqual) {$rettype= ($types{$sqlstype} ."($sqlqual)"); } }# A few special caseselsif ($sqlstypeeq'bit'and not defined$sqlqual) {$rettype="boolean"; } elsif ($sqlstypeeq'ntext'and not defined$sqlqual) ...
select 'alter table '||table_name||' disable constraint '||constraint_name||';' from user_constraints where constraint_type='R'; 2. 启用所有外键约束 select 'alter table '||table_name||' enable constraint '||constraint_name||';' from user_constraints where constraint_type='R'; ...
[RESTRICT | CASCADE] DISABLE TRIGGER [trigger_name | ALL | USER] ENABLE TRIGGER [trigger_name | ALL | USER] CLUSTER ON index_name SET WITHOUT CLUSTER SET WITHOUT OIDS SET (FILLFACTOR = value) RESET (FILLFACTOR) INHERIT parent_table NO INHERIT parent_table OWNER TO new_owner SET TABLESPACE...
make all -C src/test/regress %endif %if %upgrade pushd postgresql-%{prevversion} upgrade_configure () { CFLAGS="$CFLAGS -fno-aggressive-loop-optimizations" ./configure \ --build=%{_build} \ --host=%{_host} \ --prefix=%prev_prefix \ --disable-rpath \ --with-lz4 ...
COPY FROM的实现逻辑比COPY TO相对复杂一些。其原因在于,COPY TO是要把数据库中的数据导出到外部,其中获取数据这一步及其并行优化,很大程度上借助了优化器和执行器的能力,复用了很多代码;而COPY FROM是要把外部数据导入数据库,其中写入数据库的行为因需要更高效的定制实现,而不能复用INSERT相关的执行器代码了。