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Optimizations to the SQL language grammar that result in a small size

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reduction and speed increase.

FossilOrigin-Name: cb5d1f83e0a33d546d4c0cb817ef1f8440d1f738
This commit is contained in:
drh
2014-01-11 03:54:05 +00:00
parent ecaa9d399c
commit f59b12fbc1
5 changed files with 33 additions and 45 deletions
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15
src/tokenize.c
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@@ -303,24 +303,15 @@ int sqlite3GetToken(const unsigned char *z, int *tokenType){
for(i=1; sqlite3Isdigit(z[i]); i++){}
return i;
}
case '#': {
for(i=1; sqlite3Isdigit(z[i]); i++){}
if( i>1 ){
/* Parameters of the form #NNN (where NNN is a number) are used
** internally by sqlite3NestedParse. */
*tokenType = TK_REGISTER;
return i;
}
/* Fall through into the next case if the '#' is not followed by
** a digit. Try to match #AAAA where AAAA is a parameter name. */
}
#ifndef SQLITE_OMIT_TCL_VARIABLE
case '$':
#endif
case '@': /* For compatibility with MS SQL Server */
case '#':
case ':': {
int n = 0;
testcase( z[0]=='$' ); testcase( z[0]=='@' ); testcase( z[0]==':' );
testcase( z[0]=='$' ); testcase( z[0]=='@' );
testcase( z[0]==':' ); testcase( z[0]=='#' );
*tokenType = TK_VARIABLE;
for(i=1; (c=z[i])!=0; i++){
if( IdChar(c) ){