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Fix the window-function group_concat() so that it returns an empty string

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if it has one or more empty string inputs.  This fixes
a bug introduced by [c6da39115d3e2b0f] on 2019-03-26 (version 3.28.0) and
reported by [forum/forumpost/bf8f43aa522c2299|forum post bf8f43aa522c2299].

FossilOrigin-Name: cec6bb3fc9932ea78ec8e63d9c2d4e56a4d94b8973b9ea46033cc4baa87c0476
This commit is contained in:
drh
2024-05-23 23:26:04 +00:00
parent 294cd87afc
commit e6d3c57204
4 changed files with 28 additions and 9 deletions
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2
src/func.c
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@ -2206,6 +2206,8 @@ static void groupConcatValue(sqlite3_context *context){
sqlite3_result_error_toobig(context);
}else if( pAccum->accError==SQLITE_NOMEM ){
sqlite3_result_error_nomem(context);
}else if( pGCC->nAccum>0 && pAccum->nChar==0 ){
sqlite3_result_text(context, "", 1, SQLITE_STATIC);
}else{
const char *zText = sqlite3_str_value(pAccum);
sqlite3_result_text(context, zText, pAccum->nChar, SQLITE_TRANSIENT);