diff options
Diffstat (limited to 'contrib/postgres_fdw/deparse.c')
| -rw-r--r-- | contrib/postgres_fdw/deparse.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/contrib/postgres_fdw/deparse.c b/contrib/postgres_fdw/deparse.c index 9351835b5e4..d761d076dc8 100644 --- a/contrib/postgres_fdw/deparse.c +++ b/contrib/postgres_fdw/deparse.c @@ -161,6 +161,7 @@ static void deparseDistinctExpr(DistinctExpr *node, deparse_expr_cxt *context); static void deparseScalarArrayOpExpr(ScalarArrayOpExpr *node, deparse_expr_cxt *context); static void deparseRelabelType(RelabelType *node, deparse_expr_cxt *context); +static void deparseArrayCoerceExpr(ArrayCoerceExpr *node, deparse_expr_cxt *context); static void deparseBoolExpr(BoolExpr *node, deparse_expr_cxt *context); static void deparseNullTest(NullTest *node, deparse_expr_cxt *context); static void deparseCaseExpr(CaseExpr *node, deparse_expr_cxt *context); @@ -702,6 +703,34 @@ foreign_expr_walker(Node *node, state = FDW_COLLATE_UNSAFE; } break; + case T_ArrayCoerceExpr: + { + ArrayCoerceExpr *e = (ArrayCoerceExpr *) node; + + /* + * Recurse to input subexpression. + */ + if (!foreign_expr_walker((Node *) e->arg, + glob_cxt, &inner_cxt, case_arg_cxt)) + return false; + + /* + * T_ArrayCoerceExpr must not introduce a collation not + * derived from an input foreign Var (same logic as for a + * function). + */ + collation = e->resultcollid; + if (collation == InvalidOid) + state = FDW_COLLATE_NONE; + else if (inner_cxt.state == FDW_COLLATE_SAFE && + collation == inner_cxt.collation) + state = FDW_COLLATE_SAFE; + else if (collation == DEFAULT_COLLATION_OID) + state = FDW_COLLATE_NONE; + else + state = FDW_COLLATE_UNSAFE; + } + break; case T_BoolExpr: { BoolExpr *b = (BoolExpr *) node; @@ -2919,6 +2948,9 @@ deparseExpr(Expr *node, deparse_expr_cxt *context) case T_RelabelType: deparseRelabelType((RelabelType *) node, context); break; + case T_ArrayCoerceExpr: + deparseArrayCoerceExpr((ArrayCoerceExpr *) node, context); + break; case T_BoolExpr: deparseBoolExpr((BoolExpr *) node, context); break; @@ -3508,6 +3540,24 @@ deparseRelabelType(RelabelType *node, deparse_expr_cxt *context) } /* + * Deparse a ArrayCoerceExpr (array-type conversion) node. + */ +static void +deparseArrayCoerceExpr(ArrayCoerceExpr *node, deparse_expr_cxt *context) +{ + deparseExpr(node->arg, context); + + /* + * No difference how to deparse explicit cast, but if we omit implicit + * cast in the query, it'll be more user-friendly + */ + if (node->coerceformat != COERCE_IMPLICIT_CAST) + appendStringInfo(context->buf, "::%s", + deparse_type_name(node->resulttype, + node->resulttypmod)); +} + +/* * Deparse a BoolExpr node. */ static void |