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Use the sqlite3IndexColumnAffinity() routine to quickly and correctly find the

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affinity of an index column.

FossilOrigin-Name: 1ee089a72d789002a0a377347fc51e08ab32fb14
This commit is contained in:
drh
2015-08-25 19:20:04 +00:00
parent f8febc1b05
commit e910769817
10 changed files with 36 additions and 29 deletions
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13
src/insert.c
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@@ -69,7 +69,7 @@ void sqlite3OpenTable(
** is managed along with the rest of the Index structure. It will be
** released when sqlite3DeleteIndex() is called.
*/
const char *sqlite3IndexAffinityStr(Vdbe *v, Index *pIdx){
const char *sqlite3IndexAffinityStr(sqlite3 *db, Index *pIdx){
if( !pIdx->zColAff ){
/* The first time a column affinity string for a particular index is
** required, it is allocated and populated here. It is then stored as
@@ -81,7 +81,6 @@ const char *sqlite3IndexAffinityStr(Vdbe *v, Index *pIdx){
*/
int n;
Table *pTab = pIdx->pTable;
sqlite3 *db = sqlite3VdbeDb(v);
pIdx->zColAff = (char *)sqlite3DbMallocRaw(0, pIdx->nColumn+1);
if( !pIdx->zColAff ){
db->mallocFailed = 1;
@@ -97,6 +96,16 @@ const char *sqlite3IndexAffinityStr(Vdbe *v, Index *pIdx){
return pIdx->zColAff;
}
/*
** Return the affinity for a single column of an index.
*/
char sqlite3IndexColumnAffinity(sqlite3 *db, Index *pIdx, int iCol){
if( !pIdx->zColAff ){
if( sqlite3IndexAffinityStr(db, pIdx)==0 ) return SQLITE_AFF_BLOB;
}
return pIdx->zColAff[iCol];
}
/*
** Compute the affinity string for table pTab, if it has not already been
** computed. As an optimization, omit trailing SQLITE_AFF_BLOB affinities.