Question

I have a Ruby hash with variables:

• a two-element array of strings
• an integer

I have tried the two following ways to insert the elements from the hash to a SQLite 3 DB:

myRubyHash.each do |k, v|
   x=[k[0],k[1],v] 
   db.execute "INSERT INTO MyTable VALUES ( ?, ?, ? )", x
end

And,

myRubyHash.each do |x|
   db.execute "INSERT INTO MyTable VALUES ( ?, ?, ? )", x
end

The first being considerably faster (but still quite slow). Is there a faster way to go about this?

If it helps, my SQLite 3 table was created by:

rows = db.execute <<-SQL
  CREATE TABLE Assoc_words_p (
    name1 varchar(30),
    name2 varchar(30),
    val int,
    PRIMARY KEY (name1,name2)
  );
SQL

Thanks

Answer 1

I found the prepare statement can be used as follows:

stmnt1 = db.prepare( "INSERT INTO Table(name1,name2,val) VALUES (?, ?, ?)" )
myRubyHash.each do |k, v|
    stmnt1.execute(k[0],k[1],v/2)
end