diff options
Diffstat (limited to 'src/backend/executor/execMain.c')
| -rw-r--r-- | src/backend/executor/execMain.c | 66 |
1 files changed, 65 insertions, 1 deletions
diff --git a/src/backend/executor/execMain.c b/src/backend/executor/execMain.c index d19e0978e4e..a6b26f6668a 100644 --- a/src/backend/executor/execMain.c +++ b/src/backend/executor/execMain.c @@ -47,6 +47,7 @@ #include "commands/tablespace.h" #include "commands/trigger.h" #include "executor/execdebug.h" +#include "mb/pg_wchar.h" #include "miscadmin.h" #include "optimizer/clauses.h" #include "parser/parse_clause.h" @@ -85,6 +86,8 @@ static void ExecutePlan(EState *estate, PlanState *planstate, DestReceiver *dest); static bool ExecCheckRTEPerms(RangeTblEntry *rte); static void ExecCheckXactReadOnly(PlannedStmt *plannedstmt); +static char *ExecBuildSlotValueDescription(TupleTableSlot *slot, + int maxfieldlen); static void EvalPlanQualStart(EPQState *epqstate, EState *parentestate, Plan *planTree); static void OpenIntoRel(QueryDesc *queryDesc); @@ -1585,10 +1588,71 @@ ExecConstraints(ResultRelInfo *resultRelInfo, ereport(ERROR, (errcode(ERRCODE_CHECK_VIOLATION), errmsg("new row for relation \"%s\" violates check constraint \"%s\"", - RelationGetRelationName(rel), failed))); + RelationGetRelationName(rel), failed), + errdetail("Failing row contains %s.", + ExecBuildSlotValueDescription(slot, 64)))); } } +/* + * ExecBuildSlotValueDescription -- construct a string representing a tuple + * + * This is intentionally very similar to BuildIndexValueDescription, but + * unlike that function, we truncate long field values. That seems necessary + * here since heap field values could be very long, whereas index entries + * typically aren't so wide. + */ +static char * +ExecBuildSlotValueDescription(TupleTableSlot *slot, int maxfieldlen) +{ + StringInfoData buf; + TupleDesc tupdesc = slot->tts_tupleDescriptor; + int i; + + /* Make sure the tuple is fully deconstructed */ + slot_getallattrs(slot); + + initStringInfo(&buf); + + appendStringInfoChar(&buf, '('); + + for (i = 0; i < tupdesc->natts; i++) + { + char *val; + int vallen; + + if (slot->tts_isnull[i]) + val = "null"; + else + { + Oid foutoid; + bool typisvarlena; + + getTypeOutputInfo(tupdesc->attrs[i]->atttypid, + &foutoid, &typisvarlena); + val = OidOutputFunctionCall(foutoid, slot->tts_values[i]); + } + + if (i > 0) + appendStringInfoString(&buf, ", "); + + /* truncate if needed */ + vallen = strlen(val); + if (vallen <= maxfieldlen) + appendStringInfoString(&buf, val); + else + { + vallen = pg_mbcliplen(val, vallen, maxfieldlen); + appendBinaryStringInfo(&buf, val, vallen); + appendStringInfoString(&buf, "..."); + } + } + + appendStringInfoChar(&buf, ')'); + + return buf.data; +} + /* * ExecFindRowMark -- find the ExecRowMark struct for given rangetable index |