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Identity columns

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This is the SQL standard-conforming variant of PostgreSQL's serial
columns.  It fixes a few usability issues that serial columns have:

- CREATE TABLE / LIKE copies default but refers to same sequence
- cannot add/drop serialness with ALTER TABLE
- dropping default does not drop sequence
- need to grant separate privileges to sequence
- other slight weirdnesses because serial is some kind of special macro

Reviewed-by: Vitaly Burovoy <vitaly.burovoy@gmail.com>
This commit is contained in:
Peter Eisentraut
2017-04-06 08:33:16 -04:00
parent 6bad580d9e
commit 3217327053
57 changed files with 2140 additions and 202 deletions
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11
src/backend/nodes/nodeFuncs.c
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@ -246,6 +246,9 @@ exprType(const Node *expr)
case T_CurrentOfExpr:
type = BOOLOID;
break;
case T_NextValueExpr:
type = ((const NextValueExpr *) expr)->typeId;
break;
case T_InferenceElem:
{
const InferenceElem *n = (const InferenceElem *) expr;
@ -919,6 +922,9 @@ exprCollation(const Node *expr)
case T_CurrentOfExpr:
coll = InvalidOid; /* result is always boolean */
break;
case T_NextValueExpr:
coll = InvalidOid; /* result is always an integer type */
break;
case T_InferenceElem:
coll = exprCollation((Node *) ((const InferenceElem *) expr)->expr);
break;
@ -1122,6 +1128,9 @@ exprSetCollation(Node *expr, Oid collation)
case T_CurrentOfExpr:
Assert(!OidIsValid(collation)); /* result is always boolean */
break;
case T_NextValueExpr:
Assert(!OidIsValid(collation)); /* result is always an integer type */
break;
default:
elog(ERROR, "unrecognized node type: %d", (int) nodeTag(expr));
break;
@ -1881,6 +1890,7 @@ expression_tree_walker(Node *node,
case T_CaseTestExpr:
case T_SetToDefault:
case T_CurrentOfExpr:
case T_NextValueExpr:
case T_SQLValueFunction:
case T_RangeTblRef:
case T_SortGroupClause:
@ -2476,6 +2486,7 @@ expression_tree_mutator(Node *node,
case T_CaseTestExpr:
case T_SetToDefault:
case T_CurrentOfExpr:
case T_NextValueExpr:
case T_SQLValueFunction:
case T_RangeTblRef:
case T_SortGroupClause: