SET in LOAD DATA INFILE - mysql

Question

OK, I thought I can figure it out by myself but I just don't seem to see it. The goal for me is to fill table MODELOS in following manner:
+--------+----------+---------+
| ID_MOD | ID_MARCA | MODELO |
+--------+----------+---------+
| 1 | 1 | C2 |
| 2 | 1 | C3 |
| 3 | 1 | C4 |
| 4 | 1 | PICASSA |
| 5 | 2 | MONDEO |
| 6 | 2 | S-MAX |
| 7 | 3 | ACCORD |
| 8 | 3 | CIVIC |
| 9 | 4 | CLS |
| 10 | 5 | 900 |
| 11 | 6 | IBIZA |
| 12 | 6 | LEON |
| 13 | 7 | 307 |
| 14 | 7 | 308 |
| 15 | 7 | 407 |
| 16 | 7 | 408 |
| 17 | 8 | MEGANE |
| 18 | 9 | GOLF |
| 19 | 9 | PASSAT |
| 20 | 9 | TOUAREG |
+--------+----------+---------+
I've got this table:
mysql> select * from MARCAS;
+----------+------------+
| ID_MARCA | MARCA |
+----------+------------+
| 1 | CITROEN |
| 2 | FORD |
| 3 | HONDA |
| 4 | MERCEDES |
| 7 | PEUGEOT |
| 8 | RENAULT |
| 5 | SAAB |
| 6 | SEAT |
| 9 | VOLKSWAGEN |
+----------+------------+
and following file to work with:
"MARCA"#"MODELO"#"MATRICULA"#PRECIO
"CITROEN"#"PICASSA"#"CPG-2044"#12000
"CITROEN"#"PICASSA"#"CPR-1762"#12500
"CITROEN"#"C4"#"FPP-1464"#13500
"CITROEN"#"C4"#"FDR-4563"#13000
"CITROEN"#"C3"#"BDF-8856"#8000
"CITROEN"#"C3"#"BPZ-7878"#7500
"CITROEN"#"C2"#"CDR-1515"#5000
"CITROEN"#"C2"#"BCC-3434"#4500
"FORD"#"MONDEO"#"BTG-3267"#8000
"FORD"#"MONDEO"#"BPP-6792"#8200
"FORD"#"S-MAX"#"FDR-1564"#20000
"FORD"#"S-MAX"#"FCE-9327"#21000
"HONDA"#"CIVIC"#"FCC-7764"#16000
"HONDA"#"CIVIC"#"FBC-4567"#14000
"HONDA"#"ACCORD"#"FFC-6768"#22000
"HONDA"#"ACCORD"#"FPB-2231"#23000
"MERCEDES"#"CLS"#"FDR-2265"#31000
"SAAB"#"900"#"FPG-1165"#21000
"SEAT"#"LEON"#"DVB-1119"#14500
"SEAT"#"LEON"#"DCR-5634"#13500
"SEAT"#"IBIZA"#"DPR-3434"#9500
"SEAT"#"IBIZA"#"DPP-8756"#10000
"PEUGEOT"#"307"#"DGX-4598"#5500
etc.
Now, what I've achieved is:
mysql> select * from MODELOS;
+--------+----------+---------+
| ID_MOD | ID_MARCA | MODELO |
+--------+----------+---------+
| 1 | NULL | MODELO |
| 2 | NULL | PICASSA |
| 3 | NULL | C4 |
| 4 | NULL | C3 |
| 5 | NULL | C2 |
| 6 | NULL | MONDEO |
| 7 | NULL | S-MAX |
| 8 | NULL | CIVIC |
| 9 | NULL | ACCORD |
| 10 | NULL | CLS |
| 11 | NULL | 900 |
| 12 | NULL | LEON |
| 13 | NULL | IBIZA |
| 14 | NULL | 307 |
| 15 | NULL | 308 |
| 16 | NULL | 407 |
| 17 | NULL | 408 |
| 18 | NULL | MEGANE |
| 19 | NULL | PASSAT |
| 20 | NULL | GOLF |
| 21 | NULL | TOUAREG |
+--------+----------+---------+
Using, these commands:
ALTER TABLE MODELOS ADD UNIQUE(MODELO);
LOAD DATA LOCAL INFILE myfile.txt
IGNORE INTO TABLE MODELOS
FIELDS TERMINATED BY '#' ENCLOSED BY '"'
LINES ENDED BY '\n'
IGNORE 1 LINES
(#ignore1, MODELO, #ignore2, #ignore3);
How can I get that to create desired output? I suspect that the easiest way to do it will be by using SET sentence in LOAD DATA INFILE, but I just don't know how?

Answer 1

You can put a query in the SET clause.
LOAD DATA LOCAL INFILE myfile.txt
IGNORE INTO TABLE MODELOS
FIELDS TERMINATED BY '#' ENCLOSED BY '"'
LINES ENDED BY '\n'
IGNORE 1 LINES
(#marca, modelo, #ignore2, #ignore3)
SET ID_MARCA = (SELECT ID_MARCA FROM MARCAS WHERE MARCA = #marca)
This uses the first column in the file to look up the corresponding ID in the MARCAS table.