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/[email protected] 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(-)
