php - "1064 - You have an error in your SQL syntax" when LOAD DATA INFILE with fields specification

Solution:

Simple test, just write a little script and run it in the CLI to see what gets output from your string.

$filename = 'dsafsdf';

$q="LOAD DATA INFILE '$filename' 
    IGNORE INTO TABLE `temp_data_1` 
    FIELDS TERMINATED BY ',' ENCLOSED BY '\\\"' ESCAPED BY '\\\' 
    LINES TERMINATED BY '\\r\\n' IGNORE 1 
    LINES (`field_1`, `field_2`, `field_3`, `field_4`, `field_5`, 
            `field_6`, `field_8`, `field_9`) 
        SET `field_7` = SUBSTRING_INDEX(`field_6`, '.',-1)";
echo $q;
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The output is

LOAD DATA INFILE 'dsafsdf' 
    IGNORE INTO TABLE `temp_data_1` 
    FIELDS TERMINATED BY ',' ENCLOSED BY '"' ESCAPED BY '\' 
    LINES TERMINATED BY '
' IGNORE 1 
    LINES (`field_1`, `field_2`, `field_3`, `field_4`, `field_5`, 
            `field_6`, `field_8`, `field_9`) 
        SET `field_7` = SUBSTRING_INDEX(`field_6`, '.',-1)
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Note the missing\ which have been interpreted as excape chars because you are in a double quoted string. So all you need to do now is add the relevant number of escapes to get the correct output like this

$q="LOAD DATA INFILE '$filename' 
    IGNORE INTO TABLE `temp_data_1` 
    FIELDS TERMINATED BY ',' ENCLOSED BY '\\\"' ESCAPED BY '\\\' 
    LINES TERMINATED BY '\\r\\n' IGNORE 1 
    LINES (`field_1`, `field_2`, `field_3`, `field_4`, `field_5`, 
            `field_6`, `field_8`, `field_9`) 
        SET `field_7` = SUBSTRING_INDEX(`field_6`, '.',-1)";
echo $q;
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Generates what was expected

LOAD DATA INFILE 'dsafsdf' 
    IGNORE INTO TABLE `temp_data_1` 
    FIELDS TERMINATED BY ',' ENCLOSED BY '\"' ESCAPED BY '\\' 
    LINES TERMINATED BY '\r\n' IGNORE 1 
    LINES (`field_1`, `field_2`, `field_3`, `field_4`, `field_5`, 
            `field_6`, `field_8`, `field_9`) 
        SET `field_7` = SUBSTRING_INDEX(`field_6`, '.',-1)
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