> On 12 Sep 2015, at 9:12pm, Aurel Wisse <aurel.wisse at gmail.com> wrote: > > CREATE TEMP TABLE offsets AS > > WITH RECURSIVE dtoff(calc_date, tmw) AS ( > > WITH dates AS (SELECT DISTINCT calc_date FROM securities) > > SELECT NULL, (SELECT min(calc_date) FROM dates) > ... > This is inevitable as "securities" is a table with 6.2 million rows. This > is the schema: > > CREATE TABLE security (calc_date TEXT, security_code INT, mx_full REAL, > mx_adj REAL, mx_std REAL, fu_full REAL, fu_adj REAL, few_full REAL, few_adj > REAL); > > > There are about 4000 distinct calc_date in securities.
Do you have an index on calc_date ? If not, make one. Simon.
