mirror of
https://git.postgresql.org/git/postgresql.git
synced 2026-02-10 04:57:34 +08:00
eb121ba2cf
Can now do queries of the form: SELECT value IS OF (integer, float8); Define macros for handling typmod manipulation for date/time types. Should be more robust than all of that brute-force inline code. Rename macros for masking and typmod manipulation to put TIMESTAMP_ or INTERVAL_ in front of the macro name, to reduce the possibility of name space collisions. Allow bit string constants without fully-specified length declaration. Try implementing CREATE TABLE/OF as a mapping to inheritance. May be appropriate, or may be replace later with something more exactly like one might expect from databases without the feature.
This directory does more than tokenize and parse SQL queries. It also creates Query structures for the various complex queries that is passed to the optimizer and then executor. parser.c things start here scan.l break query into tokens scansup.c handle escapes in input keywords.c turn keywords into specific tokens gram.y parse the tokens and fill query-type-specific structures analyze.c handle post-parse processing for each query type parse_clause.c handle clauses like WHERE, ORDER BY, GROUP BY, ... parse_coerce.c used for coercing expressions of different types parse_expr.c handle expressions like col, col + 3, x = 3 or x = 4 parse_oper.c handle operations in expressions parse_agg.c handle aggregates, like SUM(col1), AVG(col2), ... parse_func.c handle functions, table.column and column identifiers parse_node.c create nodes for various structures parse_target.c handle the result list of the query parse_relation.c support routines for tables and column handling parse_type.c support routines for type handling