In Kingbase, the user is specified to search the schema by default, or the user cannot use the function under the public schema

kingbase There are some weird settings ,search_path It's one of them . This command is used to set the user's default schema. If not set , Such as user user1 Want to read schema2 The table below , That's in sql It should be indicated in schema. Such as ：

select * from schema2.table1;

If you don't want to toss like this , Then we will schema2 Designated as user1 Default schema：

alter user user1 set search_path to schema2;

however ！ There is a problem with the above sentence ！ Can cause user1 Default schema It's just schema2, Thus losing the public schema public Default access to . Actually this search_path and windows In environment variable path similar , It can specify multiple . It specifies a , Override default , It could be accessed naturally public Of the lower element , Not now . Not long ago , We have a kingbase Library installed kingbaseGIS, Added support for spatial data . And these spatial functions , be located public Next ：

The results are executed as follows SQL, I can't live or die , Always reporting mistakes , Can't recognize this ST_Polygon.

SELECT ST_Polygon(ST_GeomFromText(
   'LINESTRING(75.15 29.53,77 29,77.6 29.5, 75.15 29.53)'),
4326);

Give the user permission to be omnipotent , Not yet. . Later, people who were still in the gold warehouse of NPC found the crux of the problem , This is this. seach_path problem . The right thing to do is ：

alter user user1 set search_path to schema2,PUBLIC,SYS_CATALOG;

kingbase Derived from postgreSQL. It is estimated that this problem is inherited . This search_path I don't understand , I don't know .