MergeAttributes() and related variable renaming
Mainly, rename "schema" to "columns" and related changes. The previous naming has long been confusing. Discussion: https://www.postgresql.org/message-id/flat/52a125e4-ff9a-95f5-9f61-b87cf447e4da%40eisentraut.org
This commit is contained in:
parent
369202bf4b
commit
b0ae29512c
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@ -782,12 +782,12 @@ TupleDescInitEntryCollation(TupleDesc desc,
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/*
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* BuildDescForRelation
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*
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* Given a relation schema (list of ColumnDef nodes), build a TupleDesc.
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* Given a list of ColumnDef nodes, build a TupleDesc.
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*
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* Note: tdtypeid will need to be filled in later on.
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*/
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TupleDesc
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BuildDescForRelation(List *schema)
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BuildDescForRelation(const List *columns)
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{
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int natts;
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AttrNumber attnum;
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@ -803,13 +803,13 @@ BuildDescForRelation(List *schema)
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/*
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* allocate a new tuple descriptor
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*/
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natts = list_length(schema);
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natts = list_length(columns);
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desc = CreateTemplateTupleDesc(natts);
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has_not_null = false;
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attnum = 0;
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foreach(l, schema)
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foreach(l, columns)
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{
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ColumnDef *entry = lfirst(l);
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AclResult aclresult;
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@ -891,7 +891,7 @@ BuildDescForRelation(List *schema)
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* with functions returning RECORD.
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*/
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TupleDesc
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BuildDescFromLists(List *names, List *types, List *typmods, List *collations)
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BuildDescFromLists(const List *names, const List *types, const List *typmods, const List *collations)
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{
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int natts;
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AttrNumber attnum;
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@ -350,7 +350,7 @@ static void truncate_check_perms(Oid relid, Form_pg_class reltuple);
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static void truncate_check_activity(Relation rel);
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static void RangeVarCallbackForTruncate(const RangeVar *relation,
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Oid relId, Oid oldRelId, void *arg);
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static List *MergeAttributes(List *schema, List *supers, char relpersistence,
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static List *MergeAttributes(List *columns, const List *supers, char relpersistence,
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bool is_partition, List **supconstr,
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List **supnotnulls);
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static List *MergeCheckConstraint(List *constraints, const char *name, Node *expr);
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@ -361,7 +361,7 @@ static void StoreCatalogInheritance(Oid relationId, List *supers,
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static void StoreCatalogInheritance1(Oid relationId, Oid parentOid,
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int32 seqNumber, Relation inhRelation,
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bool child_is_partition);
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static int findAttrByName(const char *attributeName, List *schema);
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static int findAttrByName(const char *attributeName, const List *columns);
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static void AlterIndexNamespaces(Relation classRel, Relation rel,
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Oid oldNspOid, Oid newNspOid, ObjectAddresses *objsMoved);
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static void AlterSeqNamespaces(Relation classRel, Relation rel,
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@ -2307,7 +2307,7 @@ storage_name(char c)
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* Returns new schema given initial schema and superclasses.
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*
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* Input arguments:
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* 'schema' is the column/attribute definition for the table. (It's a list
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* 'columns' is the column/attribute definition for the table. (It's a list
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* of ColumnDef's.) It is destructively changed.
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* 'supers' is a list of OIDs of parent relations, already locked by caller.
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* 'relpersistence' is the persistence type of the table.
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@ -2369,17 +2369,17 @@ storage_name(char c)
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*----------
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*/
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static List *
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MergeAttributes(List *schema, List *supers, char relpersistence,
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MergeAttributes(List *columns, const List *supers, char relpersistence,
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bool is_partition, List **supconstr, List **supnotnulls)
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{
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List *inhSchema = NIL;
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List *inh_columns = NIL;
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List *constraints = NIL;
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List *nnconstraints = NIL;
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bool have_bogus_defaults = false;
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int child_attno;
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static Node bogus_marker = {0}; /* marks conflicting defaults */
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List *saved_schema = NIL;
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ListCell *entry;
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List *saved_columns = NIL;
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ListCell *lc;
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/*
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* Check for and reject tables with too many columns. We perform this
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@ -2392,7 +2392,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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* Note that we also need to check that we do not exceed this figure after
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* including columns from inherited relations.
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*/
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if (list_length(schema) > MaxHeapAttributeNumber)
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if (list_length(columns) > MaxHeapAttributeNumber)
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ereport(ERROR,
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(errcode(ERRCODE_TOO_MANY_COLUMNS),
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errmsg("tables can have at most %d columns",
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@ -2406,15 +2406,15 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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* sense to assume such conflicts are errors.
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*
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* We don't use foreach() here because we have two nested loops over the
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* schema list, with possible element deletions in the inner one. If we
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* columns list, with possible element deletions in the inner one. If we
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* used foreach_delete_current() it could only fix up the state of one of
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* the loops, so it seems cleaner to use looping over list indexes for
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* both loops. Note that any deletion will happen beyond where the outer
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* loop is, so its index never needs adjustment.
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*/
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for (int coldefpos = 0; coldefpos < list_length(schema); coldefpos++)
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for (int coldefpos = 0; coldefpos < list_length(columns); coldefpos++)
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{
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ColumnDef *coldef = list_nth_node(ColumnDef, schema, coldefpos);
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ColumnDef *coldef = list_nth_node(ColumnDef, columns, coldefpos);
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if (!is_partition && coldef->typeName == NULL)
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{
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@ -2431,9 +2431,9 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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}
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/* restpos scans all entries beyond coldef; incr is in loop body */
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for (int restpos = coldefpos + 1; restpos < list_length(schema);)
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for (int restpos = coldefpos + 1; restpos < list_length(columns);)
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{
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ColumnDef *restdef = list_nth_node(ColumnDef, schema, restpos);
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ColumnDef *restdef = list_nth_node(ColumnDef, columns, restpos);
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if (strcmp(coldef->colname, restdef->colname) == 0)
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{
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@ -2447,7 +2447,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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coldef->cooked_default = restdef->cooked_default;
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coldef->constraints = restdef->constraints;
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coldef->is_from_type = false;
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schema = list_delete_nth_cell(schema, restpos);
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columns = list_delete_nth_cell(columns, restpos);
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}
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else
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ereport(ERROR,
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@ -2467,18 +2467,18 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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*/
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if (is_partition)
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{
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saved_schema = schema;
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schema = NIL;
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saved_columns = columns;
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columns = NIL;
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}
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/*
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* Scan the parents left-to-right, and merge their attributes to form a
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* list of inherited attributes (inhSchema).
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* list of inherited columns (inh_columns).
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*/
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child_attno = 0;
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foreach(entry, supers)
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foreach(lc, supers)
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{
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Oid parent = lfirst_oid(entry);
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Oid parent = lfirst_oid(lc);
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Relation relation;
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TupleDesc tupleDesc;
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TupleConstr *constr;
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@ -2486,7 +2486,6 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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List *inherited_defaults;
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List *cols_with_defaults;
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List *nnconstrs;
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AttrNumber parent_attno;
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ListCell *lc1;
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ListCell *lc2;
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Bitmapset *pkattrs;
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@ -2507,8 +2506,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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* We do not allow partitioned tables and partitions to participate in
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* regular inheritance.
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*/
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if (relation->rd_rel->relkind == RELKIND_PARTITIONED_TABLE &&
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!is_partition)
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if (relation->rd_rel->relkind == RELKIND_PARTITIONED_TABLE && !is_partition)
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ereport(ERROR,
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(errcode(ERRCODE_WRONG_OBJECT_TYPE),
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errmsg("cannot inherit from partitioned table \"%s\"",
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@ -2593,7 +2591,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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nncols = bms_add_member(nncols,
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((CookedConstraint *) lfirst(lc1))->attnum);
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for (parent_attno = 1; parent_attno <= tupleDesc->natts;
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for (AttrNumber parent_attno = 1; parent_attno <= tupleDesc->natts;
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parent_attno++)
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{
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Form_pg_attribute attribute = TupleDescAttr(tupleDesc,
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@ -2611,7 +2609,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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/*
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* Does it conflict with some previously inherited column?
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*/
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exist_attno = findAttrByName(attributeName, inhSchema);
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exist_attno = findAttrByName(attributeName, inh_columns);
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if (exist_attno > 0)
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{
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Oid defTypeId;
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@ -2624,7 +2622,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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ereport(NOTICE,
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(errmsg("merging multiple inherited definitions of column \"%s\"",
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attributeName)));
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def = (ColumnDef *) list_nth(inhSchema, exist_attno - 1);
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def = (ColumnDef *) list_nth(inh_columns, exist_attno - 1);
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/*
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* Must have the same type and typmod
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@ -2761,7 +2759,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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if (CompressionMethodIsValid(attribute->attcompression))
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def->compression =
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pstrdup(GetCompressionMethodName(attribute->attcompression));
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inhSchema = lappend(inhSchema, def);
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inh_columns = lappend(inh_columns, def);
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newattmap->attnums[parent_attno - 1] = ++child_attno;
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/*
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* If we already had a default from some prior parent, check to
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* see if they are the same. If so, no problem; if not, mark the
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* column as having a bogus default. Below, we will complain if
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* the bogus default isn't overridden by the child schema.
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* the bogus default isn't overridden by the child columns.
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*/
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Assert(def->raw_default == NULL);
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if (def->cooked_default == NULL)
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if (constr && constr->num_check > 0)
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{
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ConstrCheck *check = constr->check;
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int i;
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for (i = 0; i < constr->num_check; i++)
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for (int i = 0; i < constr->num_check; i++)
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{
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char *name = check[i].ccname;
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Node *expr;
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@ -2945,27 +2942,27 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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}
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/*
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* If we had no inherited attributes, the result schema is just the
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* If we had no inherited attributes, the result columns are just the
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* explicitly declared columns. Otherwise, we need to merge the declared
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* columns into the inherited schema list. Although, we never have any
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* columns into the inherited column list. Although, we never have any
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* explicitly declared columns if the table is a partition.
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*/
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if (inhSchema != NIL)
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if (inh_columns != NIL)
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{
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int schema_attno = 0;
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int newcol_attno = 0;
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foreach(entry, schema)
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foreach(lc, columns)
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{
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ColumnDef *newdef = lfirst(entry);
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ColumnDef *newdef = lfirst(lc);
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char *attributeName = newdef->colname;
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int exist_attno;
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schema_attno++;
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newcol_attno++;
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/*
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* Does it conflict with some previously inherited column?
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*/
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exist_attno = findAttrByName(attributeName, inhSchema);
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exist_attno = findAttrByName(attributeName, inh_columns);
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if (exist_attno > 0)
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{
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ColumnDef *def;
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@ -2985,7 +2982,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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/*
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* Yes, try to merge the two column definitions.
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*/
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if (exist_attno == schema_attno)
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if (exist_attno == newcol_attno)
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ereport(NOTICE,
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(errmsg("merging column \"%s\" with inherited definition",
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attributeName)));
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@ -2993,7 +2990,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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ereport(NOTICE,
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(errmsg("moving and merging column \"%s\" with inherited definition", attributeName),
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errdetail("User-specified column moved to the position of the inherited column.")));
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def = (ColumnDef *) list_nth(inhSchema, exist_attno - 1);
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def = (ColumnDef *) list_nth(inh_columns, exist_attno - 1);
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/*
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* Must have the same type and typmod
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@ -3118,19 +3115,19 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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else
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{
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/*
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* No, attach new column to result schema
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* No, attach new column to result columns
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*/
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inhSchema = lappend(inhSchema, newdef);
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inh_columns = lappend(inh_columns, newdef);
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}
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}
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schema = inhSchema;
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columns = inh_columns;
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/*
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* Check that we haven't exceeded the legal # of columns after merging
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* in inherited columns.
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*/
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if (list_length(schema) > MaxHeapAttributeNumber)
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if (list_length(columns) > MaxHeapAttributeNumber)
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ereport(ERROR,
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(errcode(ERRCODE_TOO_MANY_COLUMNS),
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errmsg("tables can have at most %d columns",
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@ -3144,13 +3141,13 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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*/
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if (is_partition)
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{
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foreach(entry, saved_schema)
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foreach(lc, saved_columns)
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{
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ColumnDef *restdef = lfirst(entry);
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ColumnDef *restdef = lfirst(lc);
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bool found = false;
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ListCell *l;
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foreach(l, schema)
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foreach(l, columns)
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{
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ColumnDef *coldef = lfirst(l);
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@ -3222,9 +3219,9 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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*/
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if (have_bogus_defaults)
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{
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foreach(entry, schema)
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foreach(lc, columns)
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{
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ColumnDef *def = lfirst(entry);
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ColumnDef *def = lfirst(lc);
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if (def->cooked_default == &bogus_marker)
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{
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@ -3247,7 +3244,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
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*supconstr = constraints;
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*supnotnulls = nnconstraints;
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return schema;
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return columns;
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}
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@ -3402,22 +3399,20 @@ StoreCatalogInheritance1(Oid relationId, Oid parentOid,
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}
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/*
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* Look for an existing schema entry with the given name.
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* Look for an existing column entry with the given name.
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*
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* Returns the index (starting with 1) if attribute already exists in schema,
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* Returns the index (starting with 1) if attribute already exists in columns,
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* 0 if it doesn't.
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*/
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static int
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findAttrByName(const char *attributeName, List *schema)
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findAttrByName(const char *attributeName, const List *columns)
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{
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ListCell *s;
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ListCell *lc;
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int i = 1;
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foreach(s, schema)
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foreach(lc, columns)
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{
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ColumnDef *def = lfirst(s);
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if (strcmp(attributeName, def->colname) == 0)
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if (strcmp(attributeName, lfirst_node(ColumnDef, lc)->colname) == 0)
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return i;
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i++;
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@ -147,8 +147,8 @@ extern void TupleDescInitEntryCollation(TupleDesc desc,
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AttrNumber attributeNumber,
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Oid collationid);
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extern TupleDesc BuildDescForRelation(List *schema);
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extern TupleDesc BuildDescForRelation(const List *columns);
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extern TupleDesc BuildDescFromLists(List *names, List *types, List *typmods, List *collations);
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extern TupleDesc BuildDescFromLists(const List *names, const List *types, const List *typmods, const List *collations);
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#endif /* TUPDESC_H */
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