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Add experimental implementation of ALTER TABLE DROP COLUMN. Only some cases work so far.

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FossilOrigin-Name: f0217937d7306fb595727e61e871e8b03d8c881d339a0865bfd0117d90d42e4e
This commit is contained in:
dan
2021-02-16 20:43:36 +00:00
parent 33941691a5
commit 6e6d9833cc
7 changed files with 332 additions and 26 deletions
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6
src/select.c
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@@ -262,7 +262,7 @@ int sqlite3JoinType(Parse *pParse, Token *pA, Token *pB, Token *pC){
** Return the index of a column in a table. Return -1 if the column
** is not contained in the table.
*/
static int columnIndex(Table *pTab, const char *zCol){
int sqlite3ColumnIndex(Table *pTab, const char *zCol){
int i;
u8 h = sqlite3StrIHash(zCol);
Column *pCol;
@@ -294,7 +294,7 @@ static int tableAndColumnIndex(
assert( (piTab==0)==(piCol==0) ); /* Both or neither are NULL */
for(i=0; i<N; i++){
iCol = columnIndex(pSrc->a[i].pTab, zCol);
iCol = sqlite3ColumnIndex(pSrc->a[i].pTab, zCol);
if( iCol>=0
&& (bIgnoreHidden==0 || IsHiddenColumn(&pSrc->a[i].pTab->aCol[iCol])==0)
){
@@ -504,7 +504,7 @@ static int sqliteProcessJoin(Parse *pParse, Select *p){
int iRightCol; /* Column number of matching column on the right */
zName = pList->a[j].zName;
iRightCol = columnIndex(pRightTab, zName);
iRightCol = sqlite3ColumnIndex(pRightTab, zName);
if( iRightCol<0
|| !tableAndColumnIndex(pSrc, i+1, zName, &iLeft, &iLeftCol, 0)
){