diff options
Diffstat (limited to 'src/backend/parser/README')
| -rw-r--r-- | src/backend/parser/README | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/src/backend/parser/README b/src/backend/parser/README index effa9008fa9..35a7a687636 100644 --- a/src/backend/parser/README +++ b/src/backend/parser/README @@ -1,20 +1,21 @@ This directory does more than tokenize and parse SQL queries. It also -creates Query structures for the various complex queries that is passed +creates Query structures for the various complex queries that are passed to the optimizer and then executor. parser.c things start here scan.l break query into tokens -scansup.c handle escapes in input +scansup.c handle escapes in input strings 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 +analyze.c top level of parse analysis for optimizable queries parse_clause.c handle clauses like WHERE, ORDER BY, GROUP BY, ... -parse_coerce.c used for coercing expressions of different types +parse_coerce.c handle coercing expressions to different types parse_expr.c handle expressions like col, col + 3, x = 3 or x = 4 -parse_oper.c handle operations in expressions +parse_oper.c handle operators 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 +parse_utilcmd.c parse analysis for utility commands (done at execution time) |