diff options
Diffstat (limited to 'src/include/nodes/parsenodes.h')
| -rw-r--r-- | src/include/nodes/parsenodes.h | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h index b4013e893dc..51fef68ca3c 100644 --- a/src/include/nodes/parsenodes.h +++ b/src/include/nodes/parsenodes.h @@ -471,6 +471,7 @@ typedef struct RangeFunction { NodeTag type; bool lateral; /* does it have LATERAL prefix? */ + bool ordinality; /* does it have WITH ORDINALITY suffix? */ Node *funccallnode; /* untransformed function call tree */ Alias *alias; /* table alias & optional column aliases */ List *coldeflist; /* list of ColumnDef nodes to describe result @@ -651,8 +652,13 @@ typedef struct XmlSerialize * dropped columns. Note however that a stored rule may have nonempty * colnames for columns dropped since the rule was created (and for that * matter the colnames might be out of date due to column renamings). + * * The same comments apply to FUNCTION RTEs when the function's return type - * is a named composite type. + * is a named composite type. In addition, for all return types, FUNCTION + * RTEs with ORDINALITY must always have the last colname entry being the + * one for the ordinal column; this is enforced when constructing the RTE. + * Thus when ORDINALITY is used, there will be exactly one more colname + * than would have been present otherwise. * * In JOIN RTEs, the colnames in both alias and eref are one-to-one with * joinaliasvars entries. A JOIN RTE will omit columns of its inputs when @@ -751,15 +757,21 @@ typedef struct RangeTblEntry /* * Fields valid for a function RTE (else NULL): * - * If the function returns RECORD, funccoltypes lists the column types - * declared in the RTE's column type specification, funccoltypmods lists - * their declared typmods, funccolcollations their collations. Otherwise, - * those fields are NIL. + * If the function returns an otherwise-unspecified RECORD, funccoltypes + * lists the column types declared in the RTE's column type specification, + * funccoltypmods lists their declared typmods, funccolcollations their + * collations. Note that in this case, ORDINALITY is not permitted, so + * there is no extra ordinal column to be allowed for. + * + * Otherwise, those fields are NIL, and the result column types must be + * derived from the funcexpr while treating the ordinal column, if + * present, as a special case. (see get_rte_attribute_*) */ Node *funcexpr; /* expression tree for func call */ List *funccoltypes; /* OID list of column type OIDs */ List *funccoltypmods; /* integer list of column typmods */ List *funccolcollations; /* OID list of column collation OIDs */ + bool funcordinality; /* is this called WITH ORDINALITY? */ /* * Fields valid for a values RTE (else NIL): |