1.2、IF-THEN-ELSE IF 条件表达式 THEN 主体部分 ELSE 主体部分 END IF; 1. 2. 3. 4. 5. IF-THEN-ELSE语句在IF-THEN增加了条件表达式为false时,执行ELSE部分的脚本。例如: IF i_name is not null THEN select account into r_account from t_user t where = i_name ; ELSE raise notice '用户名...
AI代码解释 ExecInterpExpr...EEO_CASE(EEOP_FUNCEXPR_STRICT){FunctionCallInfo fcinfo=op->d.func.fcinfo_data;NullableDatum*args=fcinfo->args;int nargs=op->d.func.nargs;Datum d;/* strict function, so check for NULL args */for(int argno=0;argno<nargs;argno++){if(args[argno].isnull){*...
CREATE OR REPLACE FUNCTION pglogical_assign_repset() RETURNS event_trigger AS $$ DECLARE obj record; BEGIN FOR obj IN SELECT * FROM pg_event_trigger_ddl_commands() LOOP IF obj.object_type = 'table' THEN IF obj.schema_name = 'config' THEN PERFORM pglogical.replication_set_add_table('conf...
那如果按照有些回答那样,先建一个临时表,然后用in subquery,并且希望这时候可以两表join呢?为了简单我直接用两表join了 droptablet_tmp;createtablet_tmp(idint);insertintot_tmp (id)values(494613),(575087),(363588),(345980),...(1);selectt9.*fromt9, t_tmpwhere t9.c1 = t_tmp.id; 时间如何...
select*fromt9wherec1in(494613,575087,363588,527650,251670,343456,426858,202886,254037, ...1); 分别生成3个sql文件,in内变量的数目分别是100,1000和10000个,执行这3个sql文件,看看时间 ➜ try psql study -f test_100.sql -o /dev/nullLOG: duration:2.879ms ...
https://yanbin.blog/postgresql-unnest-batch-crud-merge/PostgreSQL 批量插入, 更新和合并操作 https://blog.csdn.net/qq_43639296/article/details/90667860postgresql中类似IFNULL用法 https://www.cnblogs.com/Paul-watermelon/p/10401344.htmlPostgreSQL入门教程(命令行)...
# if (execnme() ==“postarez" && devname != “N/A") a[pid()] <<< t } probe process("/home/pg93/pgsql9.3.1/bin/postges").mark(" query_done") { if (@count(a[pid()])) printdln(“**", pid(), @count(a[pid()]), @avg(a[pid()])) println("query_done“,user_...
print('我是您的PostgreSQL AI助手,请输入您想查询的问题,例如:\n1、如何创建table?\n2、给我解释一下select语句?\n3、如何创建一个存储过程?') while True: query = input("\n输入您的问题:") query_handler(query) if __name__ == "__main__": ...
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if; for v_record in with t_wait as (select a.mode,a.locktype,a.database,a.relation,a.page,a.tuple,a.classid,a.objid,a.objsubid, a.pid,a.virtualtransaction,a.virtualxid,a,transactionid,b.query,b.xact_start,b.query_start, b.usename,b.datname from pg_locks a,pg_stat_activity...