pgsql: ALTER [IF EXISTS] ... allows silent DDL if required,

ALTER <thing> [IF EXISTS] ... allows silent DDL if required,
e.g. ALTER FOREIGN TABLE IF EXISTS foo RENAME TO bar

Pavel Stehule

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/b8a91d9d1c7ec75aaecf13df687ec7b5b0ed35a6

Modified Files
--------------
doc/src/sgml/ref/alter_foreign_table.sgml  |   18 ++-
doc/src/sgml/ref/alter_index.sgml          |   18 ++-
doc/src/sgml/ref/alter_sequence.sgml       |   18 ++-
doc/src/sgml/ref/alter_table.sgml          |   18 ++-
doc/src/sgml/ref/alter_view.sgml           |   24 +++-
src/backend/commands/sequence.c            |   10 ++-
src/backend/commands/tablecmds.c           |   34 ++++-
src/backend/nodes/copyfuncs.c              |    4 +
src/backend/nodes/equalfuncs.c             |    4 +
src/backend/parser/gram.y                  |  216 ++++++++++++++++++++++++++++
src/backend/parser/parse_utilcmd.c         |   10 ++-
src/backend/tcop/utility.c                 |   53 ++++---
src/include/nodes/parsenodes.h             |    4 +
src/test/regress/expected/alter_table.out  |   46 ++++++
src/test/regress/expected/foreign_data.out |   44 ++++++
src/test/regress/expected/sequence.out     |    3 +
src/test/regress/sql/alter_table.sql       |   32 ++++
src/test/regress/sql/foreign_data.sql      |   26 ++++
src/test/regress/sql/sequence.sql          |    4 +
19 files changed, 534 insertions(+), 52 deletions(-)