24.09.2024

Basic tables/Table functions/set_autoincrement.txt

+-- DROP PROCEDURE basics.set_autoincrement(varchar, varchar);
+
+CREATE OR REPLACE PROCEDURE basics.set_autoincrement(table_name character varying, col_name character varying)
+ LANGUAGE plpgsql
+AS $procedure$
+
+-- sets autoincrement on existing table starting after max value if the column
+
+declare 
+
+max_col_value int;
+
+BEGIN
+
+EXECUTE format('select max(%s) from basics.%s', col_name, table_name) INTO max_col_value;
+max_col_value := max_col_value +1;
+
+execute 'drop SEQUENCE if exists basics.'||table_name ||'_'||col_name||'_seq cascade';
+execute 'CREATE SEQUENCE basics.'||table_name ||'_'||col_name||'_seq START WITH '||max_col_value ;
+execute 'ALTER TABLE basics.'||table_name ||' ALTER COLUMN '||col_name||' 
+SET DEFAULT nextval(''basics.'||table_name ||'_'||col_name||'_seq'')';
+commit;
+
+END;
+	
+$procedure$
+;
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