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Make stxstattarget nullable

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To match attstattarget change (commit 4f622503d6).  The logic inside
CreateStatistics() is clarified a bit compared to that previous patch,
and so here we also update ATExecSetStatistics() to match.

Reviewed-by: Tomas Vondra <tomas.vondra@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/4da8d211-d54d-44b9-9847-f2a9f1184c76@eisentraut.org
This commit is contained in:
Peter Eisentraut
2024-03-17 12:22:05 +01:00
parent 33e729c514
commit 012460ee93
11 changed files with 96 additions and 73 deletions
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47
src/backend/commands/tablecmds.c
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@@ -8712,6 +8712,7 @@ static ObjectAddress
ATExecSetStatistics(Relation rel, const char *colName, int16 colNum, Node *newValue, LOCKMODE lockmode)
{
int newtarget;
bool newtarget_default;
Relation attrelation;
HeapTuple tuple,
newtuple;
@@ -8733,35 +8734,35 @@ ATExecSetStatistics(Relation rel, const char *colName, int16 colNum, Node *newVa
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot refer to non-index column by number")));
if (newValue)
/* -1 was used in previous versions for the default setting */
if (newValue && intVal(newValue) != -1)
{
newtarget = intVal(newValue);
newtarget_default = false;
}
else
newtarget_default = true;
if (!newtarget_default)
{
/*
* -1 was used in previous versions to represent the default setting
* Limit target to a sane range
*/
newtarget = -1;
}
/*
* Limit target to a sane range
*/
if (newtarget < -1)
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("statistics target %d is too low",
newtarget)));
}
else if (newtarget > MAX_STATISTICS_TARGET)
{
newtarget = MAX_STATISTICS_TARGET;
ereport(WARNING,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("lowering statistics target to %d",
newtarget)));
if (newtarget < 0)
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("statistics target %d is too low",
newtarget)));
}
else if (newtarget > MAX_STATISTICS_TARGET)
{
newtarget = MAX_STATISTICS_TARGET;
ereport(WARNING,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("lowering statistics target to %d",
newtarget)));
}
}
attrelation = table_open(AttributeRelationId, RowExclusiveLock);
@@ -8815,7 +8816,7 @@ ATExecSetStatistics(Relation rel, const char *colName, int16 colNum, Node *newVa
/* Build new tuple. */
memset(repl_null, false, sizeof(repl_null));
memset(repl_repl, false, sizeof(repl_repl));
if (newtarget != -1)
if (!newtarget_default)
repl_val[Anum_pg_attribute_attstattarget - 1] = newtarget;
else
repl_null[Anum_pg_attribute_attstattarget - 1] = true;