WebJoin against the output of an array unnest without creating a temp table Hassan Syed 2012-08-31 14:36:21 3880 1 postgresql / postgresql-9.1 / plpgsql / unnest / set-returning-functions WebJan 21, 2014 · The upside is that, if the temporary set is large, you can create an index on it and ultimately analyze the table before proceeding to query it. You can control whether the temp table is dropped at the end of the transaction or at the end of the session using on commit in its definition. Adding to this, though, another way to do recursive ...
postgresql - Postgres function: return multiple tables - Stack Overflow
WebApr 1, 2024 · CREATE FUNCTION _name_ () RETURNS integer AS $$ CREATE TABLE inputCategories( Category varchar(255) ); DROP TABLE inputCategories; SELECT 0; $$ LANGUAGE SQL VOLATILE ; SQL language functions and PLPGSQL language functions are treated differently, and so depending on the nature of your real function, there may … WebMay 1, 2016 · The crucial part here is the variable of type t_foo [] - that is, an array of records of the pre-defined type t_foo. This is not as easy to work with as a temporary table or table variable, because you need to use array functions to get data in and out, but may be useful. It's worth considering though whether you really need the complex local ... brpt phone number
postgresql - SELECTing commands into a temp table to EXECUTE …
WebJun 26, 2024 · When temp tables are involved, MySQL will use a different logic and do the evaluation before/during the group by when it creates the temp tables. When MySQL creates a temp table, it has to materialize every single row, and that includes the functions as well. If your query is going to create a huge temp table, MySQL will execute the … WebFeb 4, 2016 · I need to change this function to take another parameter which tells if to use table_a or table_b. when whichtouse=1 I need to use table_a . when whichtouse=2 I need to use table_b . WebTo create a temporary table, you use the CREATE TEMPORARY TABLE statement: CREATE TEMPORARY TABLE temp_table_name ( column_list ); Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) In … brp training login