Query Folding for MySQL and PostgreSQL

Hi there!
I use simple M code (see below) but PQ load all rows instead of doing Query Folding.
What's wrong?
let
    Source = MySQL.Database("10.8.0.10", "leb"),
    leb_x_sale_orders = Source{[Schema="leb",Item="x_sale_orders"]}[Data],
    #"Removed Other Columns" = Table.SelectColumns(leb_x_sale_orders,{"ID", "CANCELED", "PRICE", "USER_ID", "DATE_INSERT"}),
    #"Filtered Rows" = Table.SelectRows(#"Removed Other Columns", each Date.IsInPreviousDay([DATE_INSERT]))
in
    #"Filtered Rows"

Thank you for the feedback. From a quick look, perhaps the Date functions are not folding. Here is a relevant
post.
You may consider to use text functions as a workaround, or wait till we check this out.

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Comparison of Oracle, MySQL and PostgreSQL DBMS

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http://www-css.fnal.gov/dsg/external/freeware/mysql-vs-pgsql.html
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thanks for the link. i wonder how they determined
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Oracle: Yes. ON DELETE CASCADE supported
PostgreSQL: Yes. ON DELETE CASCADE and ON UPDATE CASCADE supported. Message was edited by:
3360
I never noticed that the quoted numbers don't even add up to 100% percent so it is not really market share.

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