Add the ability for the core grammar to have more than one parse target.
This patch essentially allows gram.y to implement a family of related
syntax trees, rather than necessarily always parsing a list of SQL
statements. raw_parser() gains a new argument, enum RawParseMode,
to say what to do. As proof of concept, add a mode that just parses
a TypeName without any other decoration, and use that to greatly
simplify typeStringToTypeName().
In addition, invent a new SPI entry point SPI_prepare_extended() to
allow SPI users (particularly plpgsql) to get at this new functionality.
In hopes of making this the last variant of SPI_prepare(), set up its
additional arguments as a struct rather than direct arguments, and
promise that future additions to the struct can default to zero.
SPI_prepare_cursor() and SPI_prepare_params() can perhaps go away at
some point.
Discussion: https://postgr.es/m/4165684.1607707277@sss.pgh.pa.us
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/844fe9f159a948377907a63d0ef3fb16dc51ce50
Modified Files
--------------
doc/src/sgml/spi.sgml | 126 +++++++++++++++++++++++++++++++++++
src/backend/commands/tablecmds.c | 2 +-
src/backend/executor/spi.c | 52 ++++++++++++++-
src/backend/parser/gram.y | 22 +++++-
src/backend/parser/parse_coerce.c | 5 +-
src/backend/parser/parse_type.c | 64 ++----------------
src/backend/parser/parser.c | 27 ++++++--
src/backend/tcop/postgres.c | 2 +-
src/include/executor/spi.h | 13 +++-
src/include/executor/spi_priv.h | 1 +
src/include/parser/parser.h | 20 +++++-
src/interfaces/ecpg/preproc/parse.pl | 2 +-
src/pl/plpgsql/src/pl_exec.c | 13 ++--
src/pl/plpgsql/src/pl_gram.y | 2 +-
14 files changed, 268 insertions(+), 83 deletions(-)
