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SQL procedures

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This adds a new object type "procedure" that is similar to a function
but does not have a return type and is invoked by the new CALL statement
instead of SELECT or similar.  This implementation is aligned with the
SQL standard and compatible with or similar to other SQL implementations.

This commit adds new commands CALL, CREATE/ALTER/DROP PROCEDURE, as well
as ALTER/DROP ROUTINE that can refer to either a function or a
procedure (or an aggregate function, as an extension to SQL).  There is
also support for procedures in various utility commands such as COMMENT
and GRANT, as well as support in pg_dump and psql.  Support for defining
procedures is available in all the languages supplied by the core
distribution.

While this commit is mainly syntax sugar around existing functionality,
future features will rely on having procedures as a separate object
type.

Reviewed-by: Andrew Dunstan <andrew.dunstan@2ndquadrant.com>
This commit is contained in:
Peter Eisentraut
2017-11-30 08:46:13 -05:00
parent 1761653bbb
commit e4128ee767
92 changed files with 2952 additions and 306 deletions
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6
src/backend/commands/alter.c
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@ -378,6 +378,8 @@ ExecRenameStmt(RenameStmt *stmt)
case OBJECT_OPCLASS:
case OBJECT_OPFAMILY:
case OBJECT_LANGUAGE:
case OBJECT_PROCEDURE:
case OBJECT_ROUTINE:
case OBJECT_STATISTIC_EXT:
case OBJECT_TSCONFIGURATION:
case OBJECT_TSDICTIONARY:
@ -495,6 +497,8 @@ ExecAlterObjectSchemaStmt(AlterObjectSchemaStmt *stmt,
case OBJECT_OPERATOR:
case OBJECT_OPCLASS:
case OBJECT_OPFAMILY:
case OBJECT_PROCEDURE:
case OBJECT_ROUTINE:
case OBJECT_STATISTIC_EXT:
case OBJECT_TSCONFIGURATION:
case OBJECT_TSDICTIONARY:
@ -842,6 +846,8 @@ ExecAlterOwnerStmt(AlterOwnerStmt *stmt)
case OBJECT_OPERATOR:
case OBJECT_OPCLASS:
case OBJECT_OPFAMILY:
case OBJECT_PROCEDURE:
case OBJECT_ROUTINE:
case OBJECT_STATISTIC_EXT:
case OBJECT_TABLESPACE:
case OBJECT_TSDICTIONARY: