Re: using expression syntax for partition bounds - Mailing list pgsql-hackers
| From | Kyotaro HORIGUCHI |
|---|---|
| Subject | Re: using expression syntax for partition bounds |
| Date | |
| Msg-id | 20180706.142603.165190373.horiguchi.kyotaro@lab.ntt.co.jp Whole thread Raw |
| In response to | Re: using expression syntax for partition bounds (Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>) |
| Responses |
Re: using expression syntax for partition bounds
|
| List | pgsql-hackers |
Hello.
cf-bot compained on this but I wondered why it got so many
errors. At the first look I found a spare semicolon before a bare
then calause:p
> - if (!IsA(value, Const));
> + if (!IsA(value, Const))
> elog(ERROR, "could not evaluate partition bound expression");
The attached is the fixed and rebsaed version.
regards.
--
Kyotaro Horiguchi
NTT Open Source Software Center
From bbf76ee4a185133e625be88bf0784f2bc308772b Mon Sep 17 00:00:00 2001
From: Kyotaro Horiguchi <horiguchi.kyotaro@lab.ntt.co.jp>
Date: Fri, 6 Jul 2018 14:05:22 +0900
Subject: [PATCH] Allow generalized expression syntax for partition bounds
Authors: Kyotaro Horiguchi, Tom Lane, Amit Langote
---
doc/src/sgml/ref/alter_table.sgml | 6 +-
doc/src/sgml/ref/create_table.sgml | 16 +--
src/backend/commands/tablecmds.c | 8 ++
src/backend/optimizer/util/clauses.c | 4 +-
src/backend/parser/gram.y | 60 +--------
src/backend/parser/parse_agg.c | 10 ++
src/backend/parser/parse_expr.c | 5 +
src/backend/parser/parse_func.c | 3 +
src/backend/parser/parse_utilcmd.c | 201 ++++++++++++++++++-----------
src/include/optimizer/clauses.h | 2 +
src/include/parser/parse_node.h | 1 +
src/include/utils/partcache.h | 6 +
src/test/regress/expected/create_table.out | 49 ++++---
src/test/regress/sql/create_table.sql | 16 ++-
14 files changed, 221 insertions(+), 166 deletions(-)
diff --git a/doc/src/sgml/ref/alter_table.sgml b/doc/src/sgml/ref/alter_table.sgml
index 1cce00eaf9..aa70beeb32 100644
--- a/doc/src/sgml/ref/alter_table.sgml
+++ b/doc/src/sgml/ref/alter_table.sgml
@@ -87,9 +87,9 @@ ALTER TABLE [ IF EXISTS ] <replaceable class="parameter">name</replaceable>
<phrase>and <replaceable class="parameter">partition_bound_spec</replaceable> is:</phrase>
-IN ( { <replaceable class="parameter">numeric_literal</replaceable> | <replaceable
class="parameter">string_literal</replaceable>| TRUE | FALSE | NULL } [, ...] ) |
-FROM ( { <replaceable class="parameter">numeric_literal</replaceable> | <replaceable
class="parameter">string_literal</replaceable>| TRUE | FALSE | MINVALUE | MAXVALUE } [, ...] )
- TO ( { <replaceable class="parameter">numeric_literal</replaceable> | <replaceable
class="parameter">string_literal</replaceable>| TRUE | FALSE | MINVALUE | MAXVALUE } [, ...] ) |
+IN ( <replaceable class="parameter">partition_bound_expr</replaceable> [, ...] ) |
+FROM ( { <replaceable class="parameter">partition_bound_expr</replaceable> | MINVALUE | MAXVALUE } [, ...] )
+ TO ( { <replaceable class="parameter">partition_bound_expr</replaceable> | MINVALUE | MAXVALUE } [, ...] ) |
WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REMAINDER <replaceable
class="parameter">numeric_literal</replaceable>)
<phrase>and <replaceable class="parameter">column_constraint</replaceable> is:</phrase>
diff --git a/doc/src/sgml/ref/create_table.sgml b/doc/src/sgml/ref/create_table.sgml
index 2a1eac9592..fcbabc78ff 100644
--- a/doc/src/sgml/ref/create_table.sgml
+++ b/doc/src/sgml/ref/create_table.sgml
@@ -86,9 +86,9 @@ CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXI
<phrase>and <replaceable class="parameter">partition_bound_spec</replaceable> is:</phrase>
-IN ( { <replaceable class="parameter">numeric_literal</replaceable> | <replaceable
class="parameter">string_literal</replaceable>| TRUE | FALSE | NULL } [, ...] ) |
-FROM ( { <replaceable class="parameter">numeric_literal</replaceable> | <replaceable
class="parameter">string_literal</replaceable>| TRUE | FALSE | MINVALUE | MAXVALUE } [, ...] )
- TO ( { <replaceable class="parameter">numeric_literal</replaceable> | <replaceable
class="parameter">string_literal</replaceable>| TRUE | FALSE | MINVALUE | MAXVALUE } [, ...] ) |
+IN ( <replaceable class="parameter">partition_bound_expr</replaceable> [, ...] ) |
+FROM ( { <replaceable class="parameter">partition_bound_expr</replaceable> | MINVALUE | MAXVALUE } [, ...] )
+ TO ( { <replaceable class="parameter">partition_bound_expr</replaceable> | MINVALUE | MAXVALUE } [, ...] ) |
WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REMAINDER <replaceable
class="parameter">numeric_literal</replaceable>)
<phrase><replaceable class="parameter">index_parameters</replaceable> in <literal>UNIQUE</literal>, <literal>PRIMARY
KEY</literal>,and <literal>EXCLUDE</literal> constraints are:</phrase>
@@ -273,12 +273,10 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
</para>
<para>
- Each of the values specified in
- the <replaceable class="parameter">partition_bound_spec</replaceable> is
- a literal, <literal>NULL</literal>, <literal>MINVALUE</literal>, or
- <literal>MAXVALUE</literal>. Each literal value must be either a
- numeric constant that is coercible to the corresponding partition key
- column's type, or a string literal that is valid input for that type.
+ <replaceable class="parameter">partition_bound_expr</replaceable> is
+ any variable-free expression (subqueries, window functions, aggregate
+ functions, and set-returning functions are not allowed). Its data type
+ must match the data type of the corresponding partition key column.
</para>
<para>
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 7c0cf0d7ee..fc24e6fa2b 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -796,6 +796,7 @@ DefineRelation(CreateStmt *stmt, char relkind, Oid ownerId,
defaultPartOid;
Relation parent,
defaultRel = NULL;
+ RangeTblEntry *rte;
/* Already have strong enough lock on the parent */
parent = heap_open(parentId, NoLock);
@@ -838,6 +839,13 @@ 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, NULL, false, false);
+ addRTEtoQuery(pstate, rte, false, true, true);
bound = transformPartitionBound(pstate, parent, stmt->partbound);
/*
diff --git a/src/backend/optimizer/util/clauses.c b/src/backend/optimizer/util/clauses.c
index 505ae0af85..77ebb40ef2 100644
--- a/src/backend/optimizer/util/clauses.c
+++ b/src/backend/optimizer/util/clauses.c
@@ -150,8 +150,6 @@ static Node *substitute_actual_parameters(Node *expr, int nargs, List *args,
static Node *substitute_actual_parameters_mutator(Node *node,
substitute_actual_parameters_context *context);
static void sql_inline_error_callback(void *arg);
-static Expr *evaluate_expr(Expr *expr, Oid result_type, int32 result_typmod,
- Oid result_collation);
static Query *substitute_actual_srf_parameters(Query *expr,
int nargs, List *args);
static Node *substitute_actual_srf_parameters_mutator(Node *node,
@@ -4840,7 +4838,7 @@ sql_inline_error_callback(void *arg)
* We use the executor's routine ExecEvalExpr() to avoid duplication of
* code and ensure we get the same result as the executor would get.
*/
-static Expr *
+Expr *
evaluate_expr(Expr *expr, Oid result_type, int32 result_typmod,
Oid result_collation)
{
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index 90dfac2cb1..183622fe44 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -581,8 +581,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query);
%type <partelem> part_elem
%type <list> part_params
%type <partboundspec> PartitionBoundSpec
-%type <node> partbound_datum PartitionRangeDatum
-%type <list> hash_partbound partbound_datum_list range_datum_list
+%type <list> hash_partbound
%type <defelt> hash_partbound_elem
/*
@@ -2739,7 +2738,7 @@ PartitionBoundSpec:
}
/* a LIST partition */
- | FOR VALUES IN_P '(' partbound_datum_list ')'
+ | FOR VALUES IN_P '(' expr_list ')'
{
PartitionBoundSpec *n = makeNode(PartitionBoundSpec);
@@ -2752,7 +2751,7 @@ PartitionBoundSpec:
}
/* a RANGE partition */
- | FOR VALUES FROM '(' range_datum_list ')' TO '(' range_datum_list ')'
+ | FOR VALUES FROM '(' expr_list ')' TO '(' expr_list ')'
{
PartitionBoundSpec *n = makeNode(PartitionBoundSpec);
@@ -2795,59 +2794,6 @@ hash_partbound:
}
;
-partbound_datum:
- Sconst { $$ = makeStringConst($1, @1); }
- | NumericOnly { $$ = makeAConst($1, @1); }
- | TRUE_P { $$ = makeStringConst(pstrdup("true"), @1); }
- | FALSE_P { $$ = makeStringConst(pstrdup("false"), @1); }
- | NULL_P { $$ = makeNullAConst(@1); }
- ;
-
-partbound_datum_list:
- partbound_datum { $$ = list_make1($1); }
- | partbound_datum_list ',' partbound_datum
- { $$ = lappend($1, $3); }
- ;
-
-range_datum_list:
- PartitionRangeDatum { $$ = list_make1($1); }
- | range_datum_list ',' PartitionRangeDatum
- { $$ = lappend($1, $3); }
- ;
-
-PartitionRangeDatum:
- MINVALUE
- {
- PartitionRangeDatum *n = makeNode(PartitionRangeDatum);
-
- n->kind = PARTITION_RANGE_DATUM_MINVALUE;
- n->value = NULL;
- n->location = @1;
-
- $$ = (Node *) n;
- }
- | MAXVALUE
- {
- PartitionRangeDatum *n = makeNode(PartitionRangeDatum);
-
- n->kind = PARTITION_RANGE_DATUM_MAXVALUE;
- n->value = NULL;
- n->location = @1;
-
- $$ = (Node *) n;
- }
- | partbound_datum
- {
- PartitionRangeDatum *n = makeNode(PartitionRangeDatum);
-
- n->kind = PARTITION_RANGE_DATUM_VALUE;
- n->value = $1;
- n->location = @1;
-
- $$ = (Node *) n;
- }
- ;
-
/*****************************************************************************
*
* ALTER TYPE
diff --git a/src/backend/parser/parse_agg.c b/src/backend/parser/parse_agg.c
index 61727e1d71..55a5304a38 100644
--- a/src/backend/parser/parse_agg.c
+++ b/src/backend/parser/parse_agg.c
@@ -499,6 +499,13 @@ check_agglevels_and_constraints(ParseState *pstate, Node *expr)
else
err = _("grouping operations are not allowed in EXECUTE parameters");
+ break;
+ case EXPR_KIND_PARTITION_BOUND:
+ if (isAgg)
+ err = _("aggregate functions are not allowed in partition bound");
+ else
+ err = _("grouping operations are not allowed in partition bound");
+
break;
case EXPR_KIND_TRIGGER_WHEN:
if (isAgg)
@@ -899,6 +906,9 @@ transformWindowFuncCall(ParseState *pstate, WindowFunc *wfunc,
case EXPR_KIND_PARTITION_EXPRESSION:
err = _("window functions are not allowed in partition key expressions");
break;
+ case EXPR_KIND_PARTITION_BOUND:
+ err = _("window functions are not allowed in partition bound");
+ break;
case EXPR_KIND_CALL_ARGUMENT:
err = _("window functions are not allowed in CALL arguments");
break;
diff --git a/src/backend/parser/parse_expr.c b/src/backend/parser/parse_expr.c
index 385e54a9b6..f8759f185b 100644
--- a/src/backend/parser/parse_expr.c
+++ b/src/backend/parser/parse_expr.c
@@ -1849,6 +1849,9 @@ transformSubLink(ParseState *pstate, SubLink *sublink)
case EXPR_KIND_CALL_ARGUMENT:
err = _("cannot use subquery in CALL argument");
break;
+ case EXPR_KIND_PARTITION_BOUND:
+ err = _("cannot use subquery in partition bound");
+ break;
/*
* There is intentionally no default: case here, so that the
@@ -3473,6 +3476,8 @@ ParseExprKindName(ParseExprKind exprKind)
return "WHEN";
case EXPR_KIND_PARTITION_EXPRESSION:
return "PARTITION BY";
+ case EXPR_KIND_PARTITION_BOUND:
+ return "partition bound";
case EXPR_KIND_CALL_ARGUMENT:
return "CALL";
diff --git a/src/backend/parser/parse_func.c b/src/backend/parser/parse_func.c
index abe1dbc521..5190b628bd 100644
--- a/src/backend/parser/parse_func.c
+++ b/src/backend/parser/parse_func.c
@@ -2348,6 +2348,9 @@ check_srf_call_placement(ParseState *pstate, Node *last_srf, int location)
case EXPR_KIND_PARTITION_EXPRESSION:
err = _("set-returning functions are not allowed in partition key expressions");
break;
+ case EXPR_KIND_PARTITION_BOUND:
+ err = _("set-returning functions are not allowed in partition bound");
+ break;
case EXPR_KIND_CALL_ARGUMENT:
err = _("set-returning functions are not allowed in CALL arguments");
break;
diff --git a/src/backend/parser/parse_utilcmd.c b/src/backend/parser/parse_utilcmd.c
index 17b54b20cc..a94cf863c1 100644
--- a/src/backend/parser/parse_utilcmd.c
+++ b/src/backend/parser/parse_utilcmd.c
@@ -48,7 +48,9 @@
#include "miscadmin.h"
#include "nodes/makefuncs.h"
#include "nodes/nodeFuncs.h"
+#include "optimizer/clauses.h"
#include "optimizer/planner.h"
+#include "optimizer/var.h"
#include "parser/analyze.h"
#include "parser/parse_clause.h"
#include "parser/parse_coerce.h"
@@ -138,9 +140,12 @@ static void transformConstraintAttrs(CreateStmtContext *cxt,
static void transformColumnType(CreateStmtContext *cxt, ColumnDef *column);
static void setSchemaName(char *context_schema, char **stmt_schema_name);
static void transformPartitionCmd(CreateStmtContext *cxt, PartitionCmd *cmd);
+static List *transformPartitionRangeBounds(ParseState *pstate, List *blist,
+ Relation parent);
static void validateInfiniteBounds(ParseState *pstate, List *blist);
-static Const *transformPartitionBoundValue(ParseState *pstate, A_Const *con,
- const char *colName, Oid colType, int32 colTypmod);
+static Const *transformPartitionBoundValue(ParseState *pstate, Node *con,
+ const char *colName, Oid colType, int32 colTypmod,
+ Oid partCollation);
/*
@@ -3649,6 +3654,7 @@ transformPartitionBound(ParseState *pstate, Relation parent,
char *colname;
Oid coltype;
int32 coltypmod;
+ Oid partcollation;
if (spec->strategy != PARTITION_STRATEGY_LIST)
ereport(ERROR,
@@ -3668,17 +3674,19 @@ transformPartitionBound(ParseState *pstate, Relation parent,
/* Need its type data too */
coltype = get_partition_col_typid(key, 0);
coltypmod = get_partition_col_typmod(key, 0);
+ partcollation = get_partition_col_collation(key, 0);
result_spec->listdatums = NIL;
foreach(cell, spec->listdatums)
{
- A_Const *con = castNode(A_Const, lfirst(cell));
+ Node *expr = (Node *) lfirst (cell);
Const *value;
ListCell *cell2;
bool duplicate;
- value = transformPartitionBoundValue(pstate, con,
- colname, coltype, coltypmod);
+ value = transformPartitionBoundValue(pstate, expr,
+ colname, coltype, coltypmod,
+ partcollation);
/* Don't add to the result if the value is a duplicate */
duplicate = false;
@@ -3701,11 +3709,6 @@ transformPartitionBound(ParseState *pstate, Relation parent,
}
else if (strategy == PARTITION_STRATEGY_RANGE)
{
- ListCell *cell1,
- *cell2;
- int i,
- j;
-
if (spec->strategy != PARTITION_STRATEGY_RANGE)
ereport(ERROR,
(errcode(ERRCODE_INVALID_TABLE_DEFINITION),
@@ -3722,23 +3725,78 @@ transformPartitionBound(ParseState *pstate, Relation parent,
errmsg("TO must specify exactly one value per partitioning column")));
/*
- * Once we see MINVALUE or MAXVALUE for one column, the remaining
- * columns must be the same.
+ * Convert raw parser nodes into PartitionRangeDatum nodes and perform
+ * any necessary validation.
*/
- validateInfiniteBounds(pstate, spec->lowerdatums);
- validateInfiniteBounds(pstate, spec->upperdatums);
+ result_spec->lowerdatums =
+ transformPartitionRangeBounds(pstate, spec->lowerdatums,
+ parent);
+ result_spec->upperdatums =
+ transformPartitionRangeBounds(pstate, spec->upperdatums,
+ parent);
+ }
+ else
+ elog(ERROR, "unexpected partition strategy: %d", (int) strategy);
- /* Transform all the constants */
- i = j = 0;
- result_spec->lowerdatums = result_spec->upperdatums = NIL;
- forboth(cell1, spec->lowerdatums, cell2, spec->upperdatums)
+ return result_spec;
+}
+
+/*
+ * transformPartitionRangeBounds
+ * This converts the expressions for range partition bounds from the raw
+ * grammar representation to PartitionRangeDatum structs
+ */
+static List *
+transformPartitionRangeBounds(ParseState *pstate, List *blist,
+ Relation parent)
+{
+ List *result = NIL;
+ PartitionKey key = RelationGetPartitionKey(parent);
+ List *partexprs = get_partition_exprs(key);
+ ListCell *lc;
+ int i,
+ j;
+
+ i = j = 0;
+ foreach(lc, blist)
+ {
+ Node *expr = lfirst(lc);
+ PartitionRangeDatum *prd = NULL;
+
+ /*
+ * Infinite range bounds -- "minvalue" and "maxvalue" -- get passed
+ * in as ColumnRefs.
+ */
+ if (IsA(expr, ColumnRef))
+ {
+ ColumnRef *cref = (ColumnRef *) expr;
+ char *cname = NULL;
+
+ if (list_length(cref->fields) == 1 &&
+ IsA(linitial(cref->fields), String))
+ cname = strVal(linitial(cref->fields));
+
+ Assert(cname != NULL);
+ if (strcmp("minvalue", cname) == 0)
+ {
+ prd = makeNode(PartitionRangeDatum);
+ prd->kind = PARTITION_RANGE_DATUM_MINVALUE;
+ prd->value = NULL;
+ }
+ else if (strcmp("maxvalue", cname) == 0)
+ {
+ prd = makeNode(PartitionRangeDatum);
+ prd->kind = PARTITION_RANGE_DATUM_MAXVALUE;
+ prd->value = NULL;
+ }
+ }
+
+ if (prd == NULL)
{
- PartitionRangeDatum *ldatum = (PartitionRangeDatum *) lfirst(cell1);
- PartitionRangeDatum *rdatum = (PartitionRangeDatum *) lfirst(cell2);
char *colname;
Oid coltype;
int32 coltypmod;
- A_Const *con;
+ Oid partcollation;
Const *value;
/* Get the column's name in case we need to output an error */
@@ -3753,50 +3811,38 @@ transformPartitionBound(ParseState *pstate, Relation parent,
false, false);
++j;
}
+
/* Need its type data too */
coltype = get_partition_col_typid(key, i);
coltypmod = get_partition_col_typmod(key, i);
+ partcollation = get_partition_col_collation(key, i);
- if (ldatum->value)
- {
- con = castNode(A_Const, ldatum->value);
- value = transformPartitionBoundValue(pstate, con,
- colname,
- coltype, coltypmod);
- if (value->constisnull)
- ereport(ERROR,
- (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
- errmsg("cannot specify NULL in range bound")));
- ldatum = copyObject(ldatum); /* don't scribble on input */
- ldatum->value = (Node *) value;
- }
-
- if (rdatum->value)
- {
- con = castNode(A_Const, rdatum->value);
- value = transformPartitionBoundValue(pstate, con,
- colname,
- coltype, coltypmod);
- if (value->constisnull)
- ereport(ERROR,
- (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
- errmsg("cannot specify NULL in range bound")));
- rdatum = copyObject(rdatum); /* don't scribble on input */
- rdatum->value = (Node *) value;
- }
-
- result_spec->lowerdatums = lappend(result_spec->lowerdatums,
- ldatum);
- result_spec->upperdatums = lappend(result_spec->upperdatums,
- rdatum);
-
+ value = transformPartitionBoundValue(pstate, expr,
+ colname,
+ coltype, coltypmod,
+ partcollation);
+ if (value->constisnull)
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
+ errmsg("cannot specify NULL in range bound")));
+ prd = makeNode(PartitionRangeDatum);
+ prd->kind = PARTITION_RANGE_DATUM_VALUE;
+ prd->value = (Node *) value;
++i;
}
- }
- else
- elog(ERROR, "unexpected partition strategy: %d", (int) strategy);
- return result_spec;
+ prd->location = exprLocation(expr);
+
+ result = lappend(result, prd);
+ }
+
+ /*
+ * Once we see MINVALUE or MAXVALUE for one column, the remaining
+ * columns must be the same.
+ */
+ validateInfiniteBounds(pstate, result);
+
+ return result;
}
/*
@@ -3845,13 +3891,14 @@ validateInfiniteBounds(ParseState *pstate, List *blist)
* Transform one constant in a partition bound spec
*/
static Const *
-transformPartitionBoundValue(ParseState *pstate, A_Const *con,
- const char *colName, Oid colType, int32 colTypmod)
+transformPartitionBoundValue(ParseState *pstate, Node *val,
+ const char *colName, Oid colType, int32 colTypmod,
+ Oid partCollation)
{
Node *value;
- /* Make it into a Const */
- value = (Node *) make_const(pstate, &con->val, con->location);
+ /* Transform raw parsetree */
+ value = transformExpr(pstate, val, EXPR_KIND_PARTITION_BOUND);
/* Coerce to correct type */
value = coerce_to_target_type(pstate,
@@ -3867,21 +3914,29 @@ transformPartitionBoundValue(ParseState *pstate, A_Const *con,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("specified value cannot be cast to type %s for column \"%s\"",
format_type_be(colType), colName),
- parser_errposition(pstate, con->location)));
+ parser_errposition(pstate, exprLocation(val))));
- /* Simplify the expression, in case we had a coercion */
+ /* We effectively ignore the value's collation. */
if (!IsA(value, Const))
- value = (Node *) expression_planner((Expr *) value);
+ value = (Node *) eval_const_expressions(NULL, value);
- /* Fail if we don't have a constant (i.e., non-immutable coercion) */
- if (!IsA(value, Const))
+ /*
+ * Make sure default expr does not refer to any vars (we need this check
+ * since the pstate includes the target table).
+ */
+ if (contain_var_clause(value))
ereport(ERROR,
- (errcode(ERRCODE_DATATYPE_MISMATCH),
- errmsg("specified value cannot be cast to type %s for column \"%s\"",
- format_type_be(colType), colName),
- errdetail("The cast requires a non-immutable conversion."),
- errhint("Try putting the literal value in single quotes."),
- parser_errposition(pstate, con->location)));
+ (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
+ errmsg("cannot use column references in partition bound expression")));
+
+ /*
+ * If it is still not a Const, evaluate the expression applying the
+ * partition key's collation.
+ */
+ value = (Node *) evaluate_expr((Expr *) value, colType, colTypmod,
+ partCollation);
+ if (!IsA(value, Const))
+ elog(ERROR, "could not evaluate partition bound expression");
return (Const *) value;
}
diff --git a/src/include/optimizer/clauses.h b/src/include/optimizer/clauses.h
index ed854fdd40..06034d499b 100644
--- a/src/include/optimizer/clauses.h
+++ b/src/include/optimizer/clauses.h
@@ -88,4 +88,6 @@ extern Query *inline_set_returning_function(PlannerInfo *root,
extern List *expand_function_arguments(List *args, Oid result_type,
HeapTuple func_tuple);
+extern Expr *evaluate_expr(Expr *expr, Oid result_type, int32 result_typmod,
+ Oid result_collation);
#endif /* CLAUSES_H */
diff --git a/src/include/parser/parse_node.h b/src/include/parser/parse_node.h
index 0230543810..27398dd0b8 100644
--- a/src/include/parser/parse_node.h
+++ b/src/include/parser/parse_node.h
@@ -69,6 +69,7 @@ typedef enum ParseExprKind
EXPR_KIND_TRIGGER_WHEN, /* WHEN condition in CREATE TRIGGER */
EXPR_KIND_POLICY, /* USING or WITH CHECK expr in policy */
EXPR_KIND_PARTITION_EXPRESSION, /* PARTITION BY expression */
+ EXPR_KIND_PARTITION_BOUND, /* partition bound value */
EXPR_KIND_CALL_ARGUMENT /* procedure argument in CALL */
} ParseExprKind;
diff --git a/src/include/utils/partcache.h b/src/include/utils/partcache.h
index 873c60fafd..dffe561ebf 100644
--- a/src/include/utils/partcache.h
+++ b/src/include/utils/partcache.h
@@ -93,4 +93,10 @@ get_partition_col_typmod(PartitionKey key, int col)
return key->parttypmod[col];
}
+static inline Oid
+get_partition_col_collation(PartitionKey key, int col)
+{
+ return key->partcollation[col];
+}
+
#endif /* PARTCACHE_H */
diff --git a/src/test/regress/expected/create_table.out b/src/test/regress/expected/create_table.out
index 672719e5d5..4202594c73 100644
--- a/src/test/regress/expected/create_table.out
+++ b/src/test/regress/expected/create_table.out
@@ -444,19 +444,40 @@ DROP TABLE partitioned, partitioned2;
CREATE TABLE list_parted (
a int
) PARTITION BY LIST (a);
--- syntax allows only string literal, numeric literal and null to be
--- specified for a partition bound value
CREATE TABLE part_1 PARTITION OF list_parted FOR VALUES IN ('1');
CREATE TABLE part_2 PARTITION OF list_parted FOR VALUES IN (2);
+CREATE TABLE part_3 PARTITION OF list_parted FOR VALUES IN ((2+1));
CREATE TABLE part_null PARTITION OF list_parted FOR VALUES IN (null);
-CREATE TABLE fail_part PARTITION OF list_parted FOR VALUES IN (int '1');
-ERROR: syntax error at or near "int"
-LINE 1: ... fail_part PARTITION OF list_parted FOR VALUES IN (int '1');
- ^
-CREATE TABLE fail_part PARTITION OF list_parted FOR VALUES IN ('1'::int);
-ERROR: syntax error at or near "::"
-LINE 1: ...fail_part PARTITION OF list_parted FOR VALUES IN ('1'::int);
- ^
+\d+ list_parted
+ Table "public.list_parted"
+ Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
+--------+---------+-----------+----------+---------+---------+--------------+-------------
+ a | integer | | | | plain | |
+Partition key: LIST (a)
+Partitions: part_1 FOR VALUES IN (1),
+ part_2 FOR VALUES IN (2),
+ part_3 FOR VALUES IN (3),
+ part_null FOR VALUES IN (NULL)
+
+-- forbidden expressions for partition bound
+CREATE TABLE part_bogus_expr_fail PARTITION OF list_parted FOR VALUES IN (somename);
+ERROR: column "somename" does not exist
+LINE 1: ...expr_fail PARTITION OF list_parted FOR VALUES IN (somename);
+ ^
+CREATE TABLE part_bogus_expr_fail PARTITION OF list_parted FOR VALUES IN (a);
+ERROR: cannot use column references in partition bound expression
+CREATE TABLE part_bogus_expr_fail PARTITION OF list_parted FOR VALUES IN (sum(a));
+ERROR: aggregate functions are not allowed in partition bound
+LINE 1: ...s_expr_fail PARTITION OF list_parted FOR VALUES IN (sum(a));
+ ^
+CREATE TABLE part_bogus_expr_fail PARTITION OF list_parted FOR VALUES IN ((select 1));
+ERROR: cannot use subquery in partition bound
+LINE 1: ...expr_fail PARTITION OF list_parted FOR VALUES IN ((select 1)...
+ ^
+CREATE TABLE part_bogus_expr_fail PARTITION OF list_parted FOR VALUES IN (generate_series(4, 6));
+ERROR: set-returning functions are not allowed in partition bound
+LINE 1: ...expr_fail PARTITION OF list_parted FOR VALUES IN (generate_s...
+ ^
-- syntax does not allow empty list of values for list partitions
CREATE TABLE fail_part PARTITION OF list_parted FOR VALUES IN ();
ERROR: syntax error at or near ")"
@@ -490,12 +511,8 @@ CREATE TABLE moneyp (
a money
) PARTITION BY LIST (a);
CREATE TABLE moneyp_10 PARTITION OF moneyp FOR VALUES IN (10);
-ERROR: specified value cannot be cast to type money for column "a"
-LINE 1: ...EATE TABLE moneyp_10 PARTITION OF moneyp FOR VALUES IN (10);
- ^
-DETAIL: The cast requires a non-immutable conversion.
-HINT: Try putting the literal value in single quotes.
-CREATE TABLE moneyp_10 PARTITION OF moneyp FOR VALUES IN ('10');
+CREATE TABLE moneyp_11 PARTITION OF moneyp FOR VALUES IN ('11');
+CREATE TABLE moneyp_12 PARTITION OF moneyp FOR VALUES IN (to_char(12, '99')::int);
DROP TABLE moneyp;
-- immutable cast should work, though
CREATE TABLE bigintp (
diff --git a/src/test/regress/sql/create_table.sql b/src/test/regress/sql/create_table.sql
index 78944950fe..30ad89b864 100644
--- a/src/test/regress/sql/create_table.sql
+++ b/src/test/regress/sql/create_table.sql
@@ -427,13 +427,18 @@ DROP TABLE partitioned, partitioned2;
CREATE TABLE list_parted (
a int
) PARTITION BY LIST (a);
--- syntax allows only string literal, numeric literal and null to be
--- specified for a partition bound value
CREATE TABLE part_1 PARTITION OF list_parted FOR VALUES IN ('1');
CREATE TABLE part_2 PARTITION OF list_parted FOR VALUES IN (2);
+CREATE TABLE part_3 PARTITION OF list_parted FOR VALUES IN ((2+1));
CREATE TABLE part_null PARTITION OF list_parted FOR VALUES IN (null);
-CREATE TABLE fail_part PARTITION OF list_parted FOR VALUES IN (int '1');
-CREATE TABLE fail_part PARTITION OF list_parted FOR VALUES IN ('1'::int);
+\d+ list_parted
+
+-- forbidden expressions for partition bound
+CREATE TABLE part_bogus_expr_fail PARTITION OF list_parted FOR VALUES IN (somename);
+CREATE TABLE part_bogus_expr_fail PARTITION OF list_parted FOR VALUES IN (a);
+CREATE TABLE part_bogus_expr_fail PARTITION OF list_parted FOR VALUES IN (sum(a));
+CREATE TABLE part_bogus_expr_fail PARTITION OF list_parted FOR VALUES IN ((select 1));
+CREATE TABLE part_bogus_expr_fail PARTITION OF list_parted FOR VALUES IN (generate_series(4, 6));
-- syntax does not allow empty list of values for list partitions
CREATE TABLE fail_part PARTITION OF list_parted FOR VALUES IN ();
@@ -458,7 +463,8 @@ CREATE TABLE moneyp (
a money
) PARTITION BY LIST (a);
CREATE TABLE moneyp_10 PARTITION OF moneyp FOR VALUES IN (10);
-CREATE TABLE moneyp_10 PARTITION OF moneyp FOR VALUES IN ('10');
+CREATE TABLE moneyp_11 PARTITION OF moneyp FOR VALUES IN ('11');
+CREATE TABLE moneyp_12 PARTITION OF moneyp FOR VALUES IN (to_char(12, '99')::int);
DROP TABLE moneyp;
-- immutable cast should work, though
--
2.16.3
pgsql-hackers by date: