From fc22b6623b6b3bab3cb057ccd282c2bfad1a0b30 Mon Sep 17 00:00:00 2001 From: Peter Eisentraut Date: Sat, 30 Mar 2019 08:13:09 +0100 Subject: Generated columns This is an SQL-standard feature that allows creating columns that are computed from expressions rather than assigned, similar to a view or materialized view but on a column basis. This implements one kind of generated column: stored (computed on write). Another kind, virtual (computed on read), is planned for the future, and some room is left for it. Reviewed-by: Michael Paquier Reviewed-by: Pavel Stehule Discussion: https://www.postgresql.org/message-id/flat/b151f851-4019-bdb1-699e-ebab07d2f40a@2ndquadrant.com --- src/backend/executor/execMain.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'src/backend/executor/execMain.c') diff --git a/src/backend/executor/execMain.c b/src/backend/executor/execMain.c index 426686b6ef6..03dcc7b820b 100644 --- a/src/backend/executor/execMain.c +++ b/src/backend/executor/execMain.c @@ -102,7 +102,7 @@ static void EvalPlanQualStart(EPQState *epqstate, EState *parentestate, Plan *planTree); /* - * Note that GetUpdatedColumns() also exists in commands/trigger.c. There does + * Note that GetAllUpdatedColumns() also exists in commands/trigger.c. There does * not appear to be any good header to put it into, given the structures that * it uses, so we let them be duplicated. Be sure to update both if one needs * to be changed, however. @@ -111,6 +111,9 @@ static void EvalPlanQualStart(EPQState *epqstate, EState *parentestate, (exec_rt_fetch((relinfo)->ri_RangeTableIndex, estate)->insertedCols) #define GetUpdatedColumns(relinfo, estate) \ (exec_rt_fetch((relinfo)->ri_RangeTableIndex, estate)->updatedCols) +#define GetAllUpdatedColumns(relinfo, estate) \ + (bms_union(exec_rt_fetch((relinfo)->ri_RangeTableIndex, estate)->updatedCols, \ + exec_rt_fetch((relinfo)->ri_RangeTableIndex, estate)->extraUpdatedCols)) /* end of local decls */ @@ -1316,6 +1319,7 @@ InitResultRelInfo(ResultRelInfo *resultRelInfo, resultRelInfo->ri_FdwState = NULL; resultRelInfo->ri_usesFdwDirectModify = false; resultRelInfo->ri_ConstraintExprs = NULL; + resultRelInfo->ri_GeneratedExprs = NULL; resultRelInfo->ri_junkFilter = NULL; resultRelInfo->ri_projectReturning = NULL; resultRelInfo->ri_onConflictArbiterIndexes = NIL; @@ -2328,7 +2332,7 @@ ExecUpdateLockMode(EState *estate, ResultRelInfo *relinfo) * been modified, then we can use a weaker lock, allowing for better * concurrency. */ - updatedCols = GetUpdatedColumns(relinfo, estate); + updatedCols = GetAllUpdatedColumns(relinfo, estate); keyCols = RelationGetIndexAttrBitmap(relinfo->ri_RelationDesc, INDEX_ATTR_BITMAP_KEY); -- cgit v1.2.3