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manual.texi Operators are operators, not functions, so they take

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manual.texi	operands, not arguments.
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paul@teton.kitebird.com 2002-05-14 11:10:29 -05:00
parent 5cabfa201b
commit 438e3debcb
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Docs/manual.texi
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@ -30479,10 +30479,10 @@ mysql> SELECT "a" ="A ";
@node Logical Operators, Control flow functions, Comparison Operators, Non-typed Operators
@subsubsection Logical Operators
@findex Logical functions
@findex Functions, logical
@findex Logical operators
@findex Operators, logical
All logical functions return @code{1} (TRUE), @code{0} (FALSE) or
All logical operators evaluate to @code{1} (TRUE), @code{0} (FALSE) or
@code{NULL} (unknown, which is in most cases the same as FALSE):
@table @code
@ -30490,9 +30490,9 @@ All logical functions return @code{1} (TRUE), @code{0} (FALSE) or
@findex ! (logical NOT)
@item NOT
@itemx !
Logical NOT. Returns @code{1} if the argument is @code{0}, otherwise returns
@code{0}.
Exception: @code{NOT NULL} returns @code{NULL}:
Logical NOT. Evaluates to @code{1} if the operand is @code{0}, otherwise
evaluates to @code{0}.
Exception: @code{NOT NULL} evaluates to @code{NULL}:
@example
mysql> SELECT NOT 1;
-> 0
@ -30503,14 +30503,14 @@ mysql> SELECT ! (1+1);
mysql> SELECT ! 1+1;
-> 1
@end example
The last example returns @code{1} because the expression evaluates
The last example produces @code{1} because the expression evaluates
the same way as @code{(!1)+1}.
@findex OR, logical
@findex || (logical OR)
@item OR
@itemx ||
Logical OR. Returns @code{1} if either argument is not @code{0} and not
Logical OR. Evaluates to @code{1} if either operand is not @code{0} and not
@code{NULL}:
@example
mysql> SELECT 1 || 0;
@ -30526,9 +30526,9 @@ mysql> SELECT 1 || NULL;
@findex && (logical AND)
@item AND
@itemx &&
Logical AND. For non-@{NULL} operands, returns @code{1} if both operands are
non-zero and @code{0} otherwise.
Returns @code{NULL} if either argument is @code{NULL}:
Logical AND. For non-@code{NULL} operands, evaluates to @code{1} if both
operands are non-zero and to @code{0} otherwise.
Produces @code{NULL} if either operand is @code{NULL}:
@example
mysql> SELECT 1 && 1;
-> 1