add 'SOUNDS LIKE' syntax

BitKeeper/etc/logging_ok

@@ -90,6 +90,7 @@ tonu@x153.internalnet
 tonu@x3.internalnet
 venu@myvenu.com
 venu@work.mysql.com
+vva@eagle.mysql.r18.ru
 vva@genie.(none)
 walrus@mysql.com
 wax@mysql.com

Docs/manual.texi

@@ -32040,6 +32040,10 @@ a single backslash to be matched).
 @item expr NOT LIKE pat [ESCAPE 'escape-char']
 Same as @code{NOT (expr LIKE pat [ESCAPE 'escape-char'])}.
 
+@findex SOUNDS LIKE
+@item expr SOUNDS LIKE expr
+Same as @code{SOUNDEX(expr)=SOUNDEX(expr)}.
+
 @cindex mSQL compatibility
 @cindex compatibility, with mSQL
 @findex REGEXP

mysql-test/r/func_str.result

@@ -80,6 +80,21 @@ this is a REAL test
 select soundex(''),soundex('he'),soundex('hello all folks');
 soundex('')	soundex('he')	soundex('hello all folks')
 	H000	H4142
+select 'mood' sounds like 'mud';
+'mood' sounds like 'mud'
+1
+select 'Glazgo' sounds like 'Liverpool';
+'Glazgo' sounds like 'Liverpool'
+0
+select null sounds like 'null';
+null sounds like 'null'
+NULL
+select 'null' sounds like null;
+'null' sounds like null
+NULL
+select null sounds like null;
+null sounds like null
+NULL
 select md5('hello');
 md5('hello')
 5d41402abc4b2a76b9719d911017c592

mysql-test/t/func_str.test

@@ -36,6 +36,11 @@ select insert('txs',2,1,'hi'),insert('is ',4,0,'a'),insert('txxxxt',2,4,'es');
 select replace('aaaa','a','b'),replace('aaaa','aa','b'),replace('aaaa','a','bb'),replace('aaaa','','b'),replace('bbbb','a','c');
 select replace(concat(lcase(concat('THIS',' ','IS',' ','A',' ')),ucase('false'),' ','test'),'FALSE','REAL') ;
 select soundex(''),soundex('he'),soundex('hello all folks');
+select 'mood' sounds like 'mud';
+select 'Glazgo' sounds like 'Liverpool';
+select null sounds like 'null';
+select 'null' sounds like null;
+select null sounds like null;
 select md5('hello');
 select sha('abc');
 select sha1('abc');

sql/lex.h

@@ -344,6 +344,7 @@ static SYMBOL symbols[] = {
   { "SQL_NO_CACHE",	SYM(SQL_NO_CACHE_SYM), 0, 0},
   { "SQL_SMALL_RESULT", SYM(SQL_SMALL_RESULT),0,0},
   { "SQL_THREAD",	SYM(SQL_THREAD),0,0},
+  { "SOUNDS",		SYM(SOUNDS_SYM),0,0},
   { "SSL",		SYM(SSL_SYM),0,0},
   { "STRAIGHT_JOIN",	SYM(STRAIGHT_JOIN),0,0},
   { "START",		SYM(START_SYM),0,0},

sql/sql_yacc.yy

@@ -100,6 +100,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %token	DIV_SYM
 %token	EQ
 %token	EQUAL_SYM
+%token	SOUNDS_SYM
 %token	GE
 %token	GT_SYM
 %token	LE
@@ -1833,6 +1834,7 @@ expr_expr:
 	| expr OR expr		{ $$= new Item_cond_or($1,$3); }
         | expr XOR expr		{ $$= new Item_cond_xor($1,$3); }
 	| expr AND expr		{ $$= new Item_cond_and($1,$3); }
+	| expr SOUNDS_SYM LIKE expr { $$= Item_bool_func2::eq_creator(new Item_func_soundex($1), new Item_func_soundex($4));}
 	| expr LIKE simple_expr opt_escape { $$= new Item_func_like($1,$3,$4); }
 	| expr NOT LIKE simple_expr opt_escape	{ $$= new Item_func_not(new Item_func_like($1,$4,$5));}
 	| expr REGEXP expr { $$= new Item_func_regex($1,$3); }
@@ -1879,6 +1881,7 @@ no_in_expr:
 	| no_in_expr OR expr		{ $$= new Item_cond_or($1,$3); }
         | no_in_expr XOR expr		{ $$= new Item_cond_xor($1,$3); }
 	| no_in_expr AND expr		{ $$= new Item_cond_and($1,$3); }
+	| no_in_expr SOUNDS_SYM LIKE expr { $$= Item_bool_func2::eq_creator(new Item_func_soundex($1), new Item_func_soundex($4));}
 	| no_in_expr LIKE simple_expr opt_escape { $$= new Item_func_like($1,$3,$4); }
 	| no_in_expr NOT LIKE simple_expr opt_escape { $$= new Item_func_not(new Item_func_like($1,$4,$5)); }
 	| no_in_expr REGEXP expr { $$= new Item_func_regex($1,$3); }
@@ -1933,6 +1936,7 @@ no_and_expr:
 	| no_and_expr OR_OR_CONCAT expr	{ $$= or_or_concat(YYTHD, $1,$3); }
 	| no_and_expr OR expr		{ $$= new Item_cond_or($1,$3); }
         | no_and_expr XOR expr		{ $$= new Item_cond_xor($1,$3); }
+	| no_and_expr SOUNDS_SYM LIKE expr { $$= Item_bool_func2::eq_creator(new Item_func_soundex($1), new Item_func_soundex($4));}
 	| no_and_expr LIKE simple_expr opt_escape { $$= new Item_func_like($1,$3,$4); }
 	| no_and_expr NOT LIKE simple_expr opt_escape	{ $$= new Item_func_not(new Item_func_like($1,$4,$5)); }
 	| no_and_expr REGEXP expr { $$= new Item_func_regex($1,$3); }
@@ -3870,6 +3874,7 @@ keyword:
 	| VALUE_SYM		{}
 	| WORK_SYM		{}
 	| YEAR_SYM		{}
+	| SOUNDS_SYM            {}
 	;
 
 /* Option functions */