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v4.0
    v4.0

    Operator | Precedence

    Operator

    • Conditional operators
    Operator Description
    @ schema checker
    == equal
    != not equal
    < less than
    > greater than
    <= less than or equal
    >= greater than or equal
    <> between
    <=> between or equal
    in belong to
    nin not belong to
    contains contain / full-text search
    =~ regular expression  V4.1 

    The operands for conditional judgement must be consistent with the definitions of conditional operators to determine true or false:

    • Logic operators
    Operator Description
    && and
    || or
    ! not
    xor exclusive OR  V4.1 

    Both operands and results of logical operation are either true or false.

    • Numeric operators
    Operator Description
    + addition
    - subtraction
    * multiplication
    / division
    % modulo (the remainder of division)

    Precedence

    The following table shows the precedence of conditional operators, logic operators and numeric operators (1 represents the highest):

    Precedence Operator Category
    1 ( ), [ ]
    2 @ conditional operator
    3 ! logic operator
    4 *, /, % numeric operator
    5 +, - numeric operator
    6 >, <, >= , <= , <> , <=>, in, nin, contains conditional operator
    7 == , != conditional operator
    8 && logic operator
    9 xor, || logic operator
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