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Issue-757: added Query update with CASE WHEN capabilities #759

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Issue-757: added Query update with CASE WHEN capabilities #759

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2f75345
Issue-757: added Query update with CASE WHEN capabilities
tfraney Aug 4, 2025
96ebb57
fix null comparison in case when
tfraney Aug 5, 2025
d893646
fix readme
tfraney Aug 6, 2025
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fix null comparison in case when
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@tfraney
tfraney committed Aug 5, 2025
commit 96ebb57727fba8628f29d204b3701d9f951a0330
17 changes: 13 additions & 4 deletions QueryBuilder/Compilers/Compiler.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -420,8 +420,8 @@ private void SetUpCaseWhenUpdatePart(SqlResult ctx, List<string> parts, string c

while (pointer <= (subparts.Length - 1))
{
var piece = subparts[pointer].ToString().ToUpperInvariant().Trim();
if (pointer > 0 && !substart)
var piece = subparts[pointer]?.ToString().ToUpperInvariant().Trim();
if (pointer > 0 && !substart && piece != null)
{
if (!VERB.SpecialChar.Any(s => s == piece) && criteriaValue)
{
Expand All @@ -444,7 +444,8 @@ private void SetUpCaseWhenUpdatePart(SqlResult ctx, List<string> parts, string c
}
}

if (!criteriaValue && VERB.AndOrOpertors.Any(s => s == piece))

if (!criteriaValue && (piece is null || VERB.AndOrOpertors.Any(s => s == piece)))
{
pointer = subparts.Length;
break;
Expand Down Expand Up @@ -481,6 +482,7 @@ private void SetUpCaseWhenUpdatePart(SqlResult ctx, List<string> parts, string c
{
field = piece;
}

if (substart && criteriaValue && !string.IsNullOrEmpty(field))
{

Expand All @@ -494,7 +496,14 @@ private void SetUpCaseWhenUpdatePart(SqlResult ctx, List<string> parts, string c
casewrap.Append(" ").Append(VERB.When);
}

casewrap.Append($" {field} = {(setasfield ? subparts[pointer] : Parameter(ctx, subparts[pointer]))}");
if (subparts[pointer] is not null)
{
casewrap.Append($" {field} = {(setasfield ? subparts[pointer] : Parameter(ctx, subparts[pointer]))}");
}
else
{
casewrap.Append($" {field} is NULL");
}
substart = false;
setasfield = false;
start = false;
Expand Down