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If we restrict unique constraints on partitioned tables so that they must always include the partition key, then our standard approach to unique indexes already works --- each unique key is forced to exist within a single partition, so enforcing the unique restriction in each index individually is enough to have it enforced globally. Therefore we can implement unique indexes on partitions by simply removing a few restrictions (and adding others.) Discussion: https://postgr.es/m/20171222212921.hi6hg6pem2w2t36z@alvherre.pgsql Discussion: https://postgr.es/m/20171229230607.3iib6b62fn3uaf47@alvherre.pgsql Reviewed-by: Simon Riggs, Jesper Pedersen, Peter Eisentraut, Jaime Casanova, Amit Langote
36 lines
1.3 KiB
C
36 lines
1.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* parse_utilcmd.h
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* parse analysis for utility commands
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*
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*
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* Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/parser/parse_utilcmd.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PARSE_UTILCMD_H
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#define PARSE_UTILCMD_H
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#include "parser/parse_node.h"
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extern List *transformCreateStmt(CreateStmt *stmt, const char *queryString);
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extern List *transformAlterTableStmt(Oid relid, AlterTableStmt *stmt,
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const char *queryString);
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extern IndexStmt *transformIndexStmt(Oid relid, IndexStmt *stmt,
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const char *queryString);
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extern void transformRuleStmt(RuleStmt *stmt, const char *queryString,
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List **actions, Node **whereClause);
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extern List *transformCreateSchemaStmt(CreateSchemaStmt *stmt);
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extern PartitionBoundSpec *transformPartitionBound(ParseState *pstate, Relation parent,
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PartitionBoundSpec *spec);
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extern IndexStmt *generateClonedIndexStmt(RangeVar *heapRel, Oid heapOid,
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Relation source_idx,
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const AttrNumber *attmap, int attmap_length,
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Oid *constraintOid);
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#endif /* PARSE_UTILCMD_H */
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