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Overview
| Comment: | Special handling of the NULL keyword. Sometimes it is a literal, and sometimes it is a keyword. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | normalize |
| Files: | files | file ages | folders |
| SHA3-256: | db5d138e97f22ad4d4d11dbef96df936 |
| User & Date: | drh 2018-01-08 19:29:28 |
Context
|
2018-01-08
| ||
| 20:04 | Test cases for sqlite3_normalize(). Closed-Leaf check-in: 658f4225 user: drh tags: normalize | |
| 19:29 | Special handling of the NULL keyword. Sometimes it is a literal, and sometimes it is a keyword. check-in: db5d138e user: drh tags: normalize | |
| 19:18 | Add IN-operator normalizating and the SQLITE_NORMALIZE_CLI compile-time option for generating a stand-alone program. check-in: d77dbb39 user: drh tags: normalize | |
Changes
Changes to ext/misc/normalize.c.
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}
case TK_LITERAL: {
z[j++] = '?';
break;
}
case TK_PUNCT:
case TK_NAME: {
if( j>0 && IdChar(z[j-1]) && IdChar(zSql[i]) ) z[j++] = ' ';
for(k=0; k<n; k++){
z[j++] = sqlite3Tolower(zSql[i+k]);
}
break;
}
}
|
> > > > > > > > > > > |
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}
case TK_LITERAL: {
z[j++] = '?';
break;
}
case TK_PUNCT:
case TK_NAME: {
if( n==4 && sqlite3_strnicmp(zSql+i,"NULL",4)==0 ){
if( (j>=3 && strncmp(z+j-2,"is",2)==0 && !IdChar(z[j-3]))
|| (j>=4 && strncmp(z+j-3,"not",3)==0 && !IdChar(z[j-4]))
){
/* NULL is a keyword in this case, not a literal value */
}else{
/* Here the NULL is a literal value */
z[j++] = '?';
break;
}
}
if( j>0 && IdChar(z[j-1]) && IdChar(zSql[i]) ) z[j++] = ' ';
for(k=0; k<n; k++){
z[j++] = sqlite3Tolower(zSql[i+k]);
}
break;
}
}
|