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Allow a partitioned table to have a default partition.

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Any tuples that don't route to any other partition will route to the
default partition.

Jeevan Ladhe, Beena Emerson, Ashutosh Bapat, Rahila Syed, and Robert
Haas, with review and testing at various stages by (at least) Rushabh
Lathia, Keith Fiske, Amit Langote, Amul Sul, Rajkumar Raghuanshi, Sven
Kunze, Kyotaro Horiguchi, Thom Brown, Rafia Sabih, and Dilip Kumar.

Discussion: http://postgr.es/m/CAH2L28tbN4SYyhS7YV1YBWcitkqbhSWfQCy0G=apRcC_PEO-bg@mail.gmail.com
Discussion: http://postgr.es/m/CAOG9ApEYj34fWMcvBMBQ-YtqR9fTdXhdN82QEKG0SVZ6zeL1xg@mail.gmail.com
This commit is contained in:
Robert Haas
2017-09-08 17:28:04 -04:00
parent 2cf15ec8b1
commit 6f6b99d133
31 changed files with 1369 additions and 137 deletions
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27
src/backend/parser/gram.y
View File

@@ -575,7 +575,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query);
%type <str> part_strategy
%type <partelem> part_elem
%type <list> part_params
%type <partboundspec> ForValues
%type <partboundspec> PartitionBoundSpec
%type <node> partbound_datum PartitionRangeDatum
%type <list> partbound_datum_list range_datum_list
@@ -1980,7 +1980,7 @@ alter_table_cmds:
partition_cmd:
/* ALTER TABLE <name> ATTACH PARTITION <table_name> FOR VALUES */
ATTACH PARTITION qualified_name ForValues
ATTACH PARTITION qualified_name PartitionBoundSpec
{
AlterTableCmd *n = makeNode(AlterTableCmd);
PartitionCmd *cmd = makeNode(PartitionCmd);
@@ -2635,13 +2635,14 @@ alter_identity_column_option:
}
;
ForValues:
PartitionBoundSpec:
/* a LIST partition */
FOR VALUES IN_P '(' partbound_datum_list ')'
{
PartitionBoundSpec *n = makeNode(PartitionBoundSpec);
n->strategy = PARTITION_STRATEGY_LIST;
n->is_default = false;
n->listdatums = $5;
n->location = @3;
@@ -2654,10 +2655,22 @@ ForValues:
PartitionBoundSpec *n = makeNode(PartitionBoundSpec);
n->strategy = PARTITION_STRATEGY_RANGE;
n->is_default = false;
n->lowerdatums = $5;
n->upperdatums = $9;
n->location = @3;
$$ = n;
}
/* a DEFAULT partition */
| DEFAULT
{
PartitionBoundSpec *n = makeNode(PartitionBoundSpec);
n->is_default = true;
n->location = @1;
$$ = n;
}
;
@@ -3130,7 +3143,7 @@ CreateStmt: CREATE OptTemp TABLE qualified_name '(' OptTableElementList ')'
$$ = (Node *)n;
}
| CREATE OptTemp TABLE qualified_name PARTITION OF qualified_name
OptTypedTableElementList ForValues OptPartitionSpec OptWith
OptTypedTableElementList PartitionBoundSpec OptPartitionSpec OptWith
OnCommitOption OptTableSpace
{
CreateStmt *n = makeNode(CreateStmt);
@@ -3149,7 +3162,7 @@ CreateStmt: CREATE OptTemp TABLE qualified_name '(' OptTableElementList ')'
$$ = (Node *)n;
}
| CREATE OptTemp TABLE IF_P NOT EXISTS qualified_name PARTITION OF
qualified_name OptTypedTableElementList ForValues OptPartitionSpec
qualified_name OptTypedTableElementList PartitionBoundSpec OptPartitionSpec
OptWith OnCommitOption OptTableSpace
{
CreateStmt *n = makeNode(CreateStmt);
@@ -4864,7 +4877,7 @@ CreateForeignTableStmt:
$$ = (Node *) n;
}
| CREATE FOREIGN TABLE qualified_name
PARTITION OF qualified_name OptTypedTableElementList ForValues
PARTITION OF qualified_name OptTypedTableElementList PartitionBoundSpec
SERVER name create_generic_options
{
CreateForeignTableStmt *n = makeNode(CreateForeignTableStmt);
@@ -4885,7 +4898,7 @@ CreateForeignTableStmt:
$$ = (Node *) n;
}
| CREATE FOREIGN TABLE IF_P NOT EXISTS qualified_name
PARTITION OF qualified_name OptTypedTableElementList ForValues
PARTITION OF qualified_name OptTypedTableElementList PartitionBoundSpec
SERVER name create_generic_options
{
CreateForeignTableStmt *n = makeNode(CreateForeignTableStmt);

12
src/backend/parser/parse_utilcmd.c
View File

@@ -3307,6 +3307,18 @@ transformPartitionBound(ParseState *pstate, Relation parent,
/* Avoid scribbling on input */
result_spec = copyObject(spec);
if (spec->is_default)
{
/*
* In case of the default partition, parser had no way to identify the
* partition strategy. Assign the parent's strategy to the default
* partition bound spec.
*/
result_spec->strategy = strategy;
return result_spec;
}
if (strategy == PARTITION_STRATEGY_LIST)
{
ListCell *cell;