0 PostgreSQL , CASE WHEN 2 Multiple conditions in case expression in postgres 0 Postgres CASE WHEN IN query 0 How to use Postgres CASE simple/short-hand syntax with multiple conditions? 0 PostgreSQL: Case with conditions based on two columns 0 Case expression in postgres 1 Use a C...
,CASE WHEN (rtp.team_id = rtp.sub_team_id) THEN 'testing' ELSE TRIM(rtd2.team_name) END AS testing_testing ,CASE WHEN (rtp.team_id = rtp.sub_team_id) THEN 'test example' ELSE TRIM(rtd2.normal_data) END AS test_response ,CASE WHEN (rtp.team_id = rtp.sub_team_id) ...
PostgreSQL CASEs can have multiple conditions. There are a handful of entries in the table where the name of country and capital is the same. You can add this to your previously constructed CASE - SELECT name, continent, indep_year, CASE WHEN (indep_year < 1900) AND (countries.name = co...
* case where there is partially sorted input and runs can be made far * larger by using a heap. In most cases, a single-pass merge step is all * that is required even when runs are no larger than available memory. * Avoiding multiple merge passes was traditionally considered to be the...
本文简单介绍了PG插入数据部分的源码,主要内容包括ProcessQuery函数的实现逻辑,该函数位于文件pquery.c中。 一、基础信息 ProcessQuery函数使用的...
When PG detects that multiple transactions have requested an invoice number from the same 'no_gap' sequence (same journal) it will rollback all transactions expect the first one, and Odoo will automatically retry 4 times the failed transactions. This will cause a small delay but will eventually...
There can be * (in fact, always should be) multiple AppendRelInfos for the same * parent_relid, but never more than one per child_relid, since a given * RTE cannot be a child of more than one append parent. * 这些字段惟一地标识这个append relationship。 * 对于同一个parent_relid可以有...
*/ oldContext = MemoryContextSwitchTo(econtext->ecxt_per_tuple_memory); /* * Evaluate the qual conditions one at a time. If we find a FALSE result, * we can stop evaluating and return FALSE --- the AND result must be * FALSE. Also, if we find a NULL result when resultForNull ...
Ans:PostgreSQL has several features that make it well-suited for handling large data and high traffic. It supports horizontal scaling through the use of read replicas and connection pooling which allows multiple connections to be handled by a single backend process. Additionally, it also has advance...
However, when inserting multiple rows into a table with a GENERATED BY DEFAULT AS IDENTITY column and using the keyword DEFAULT to get the next ID value, the default value is coming back as null. For example, let's say I have a table CREATE TABLE test ( id int GENERATED BY...