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Allow generalized expression syntax for partition bounds

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Previously, only literals were allowed.  This change allows general
expressions, including functions calls, which are evaluated at the
time the DDL command is executed.

Besides offering some more functionality, it simplifies the parser
structures and removes some inconsistencies in how the literals were
handled.

Author: Kyotaro Horiguchi, Tom Lane, Amit Langote
Reviewed-by: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Discussion: https://www.postgresql.org/message-id/flat/9f88b5e0-6da2-5227-20d0-0d7012beaa1c@lab.ntt.co.jp/
This commit is contained in:
Peter Eisentraut
2019-01-25 11:27:59 +01:00
parent e3565fd61c
commit 7c079d7417
14 changed files with 315 additions and 168 deletions
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9
src/backend/commands/tablecmds.c
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@ -830,6 +830,7 @@ DefineRelation(CreateStmt *stmt, char relkind, Oid ownerId,
defaultPartOid;
Relation parent,
defaultRel = NULL;
RangeTblEntry *rte;
/* Already have strong enough lock on the parent */
parent = table_open(parentId, NoLock);
@ -872,6 +873,14 @@ DefineRelation(CreateStmt *stmt, char relkind, Oid ownerId,
pstate = make_parsestate(NULL);
pstate->p_sourcetext = queryString;
/*
* Add an RTE containing this relation, so that transformExpr called
* on partition bound expressions is able to report errors using a
* proper context.
*/
rte = addRangeTableEntryForRelation(pstate, rel, AccessShareLock,
NULL, false, false);
addRTEtoQuery(pstate, rte, false, true, true);
bound = transformPartitionBound(pstate, parent, stmt->partbound);
/*