Allow user to disable automatic close parenthesis functionality
At some point SQL Complete was modified to automatically close parenthesis when writing functions. When I type 'sum(' the close paren is automatically added and the cursor placed within the parens. This forces me to resort to using the arrow keys when I am done supplying the function's arguments. I don't type with arrow keys, and would like the ability to disable this functionality.

There is a setting ‘Add parentheses when inserting function’.
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Sheldon commented
Something that helped me was to editing the triggering buttons for auto completion in settings. For example, I removed parenthesis and period, and it stopped auto completing those for me. Try it out, should help.