“public” is PostgreSQL default scheme, i have to change it because i had migrated a new database data into another new schema call “new_public”.
Before start to change, i have to check what is current PostgreSQL default schema?

1) Command

SHOW search_path

2) Check postgresql.conf

#---------------------------------------------------------------------------
# CLIENT CONNECTION DEFAULTS
#---------------------------------------------------------------------------
 
# - Statement Behavior -
 
#search_path = '"$user",public'		# schema names
#default_tablespace = ''		# a tablespace name, '' uses
					# the DEFAULT
#check_function_bodies = ON
#default_transaction_isolation = 'read committed'
#default_transaction_read_only = off

Here i show how to change Postgresql default schema.

SET search_path = new_schema

However above command is apply to current session only, next time schema will change back to public. If we want to make effect permanently, we have to change in postgresql.conf file like following.

#---------------------------------------------------------------------------
# CLIENT CONNECTION DEFAULTS
#---------------------------------------------------------------------------
 
# - Statement Behavior -
 
#search_path = '"$user",public'		# schema names
search_path = '"$user",new_schema'	# NEW SCHEMA HERE
#default_tablespace = ''		# a tablespace name, '' uses
					# the DEFAULT
#check_function_bodies = ON
#default_transaction_isolation = 'read committed'
#default_transaction_read_only = off

After that just restart PostgreSQL service. Done.

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