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Per-column collation support

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This adds collation support for columns and domains, a COLLATE clause
to override it per expression, and B-tree index support.

Peter Eisentraut
reviewed by Pavel Stehule, Itagaki Takahiro, Robert Haas, Noah Misch
This commit is contained in:
Peter Eisentraut
2011-02-08 23:04:18 +02:00
parent 1703f0e8da
commit 414c5a2ea6
156 changed files with 4519 additions and 582 deletions
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src/include/commands/vacuum.h
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@@ -66,12 +66,13 @@ typedef struct VacAttrStats
* Note: do not assume that the data being analyzed has the same datatype
* shown in attr, ie do not trust attr->atttypid, attlen, etc. This is
* because some index opclasses store a different type than the underlying
* column/expression. Instead use attrtypid, attrtypmod, and attrtype for
* column/expression. Instead use attrtypid, attrtypmod, attrcollation, and attrtype for
* information about the datatype being fed to the typanalyze function.
*/
Form_pg_attribute attr; /* copy of pg_attribute row for column */
Oid attrtypid; /* type of data being analyzed */
int32 attrtypmod; /* typmod of data being analyzed */
Oid attrcollation; /* collation of the data being analyzed */
Form_pg_type attrtype; /* copy of pg_type row for attrtypid */
MemoryContext anl_context; /* where to save long-lived data */