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Allow the xfer optimization to proceed if the DEFAULT on the very first

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column of the two tables is different.  This is a refinement of the
fix for ticket [f67b41381a].

FossilOrigin-Name: 349f483499dd685a8da94923b6bd810a52e5e236
This commit is contained in:
drh
2014-04-26 17:52:08 +00:00
parent 9940e2aa45
commit 453e0261df
4 changed files with 19 additions and 14 deletions
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6
src/insert.c
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@@ -1876,8 +1876,10 @@ static int xferOptimization(
if( pDestCol->notNull && !pSrcCol->notNull ){
return 0; /* tab2 must be NOT NULL if tab1 is */
}
if( (pDestCol->zDflt==0)!=(pSrcCol->zDflt==0)
|| (pDestCol->zDflt && strcmp(pDestCol->zDflt, pSrcCol->zDflt))
/* Default values for second and subsequent columns need to match. */
if( i>0
&& ((pDestCol->zDflt==0)!=(pSrcCol->zDflt==0)
|| (pDestCol->zDflt && strcmp(pDestCol->zDflt, pSrcCol->zDflt)!=0))
){
return 0; /* Default values must be the same for all columns */
}