Allow omitting one or both boundaries in an array slice specifier.

Omitted boundaries represent the upper or lower limit of the corresponding
array subscript.  This allows simpler specification of many common
use-cases.

(Revised version of commit 9246af6799819847faa33baf441251003acbb8fe)

YUriy Zhuravlev

3 files changed, 3 insertions, 0 deletions

diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c
index ba04b7227c..4cf14b6f71 100644
--- a/src/backend/nodes/copyfuncs.c
+++ b/src/backend/nodes/copyfuncs.c
@@ -2401,6 +2401,7 @@ _copyAIndices(const A_Indices *from)
 {
 	A_Indices  *newnode = makeNode(A_Indices);
 
+	COPY_SCALAR_FIELD(is_slice);
 	COPY_NODE_FIELD(lidx);
 	COPY_NODE_FIELD(uidx);
 
diff --git a/src/backend/nodes/equalfuncs.c b/src/backend/nodes/equalfuncs.c
index 356fcafeb4..a13d83181b 100644
--- a/src/backend/nodes/equalfuncs.c
+++ b/src/backend/nodes/equalfuncs.c
@@ -2151,6 +2151,7 @@ _equalAStar(const A_Star *a, const A_Star *b)
 static bool
 _equalAIndices(const A_Indices *a, const A_Indices *b)
 {
+	COMPARE_SCALAR_FIELD(is_slice);
 	COMPARE_NODE_FIELD(lidx);
 	COMPARE_NODE_FIELD(uidx);
 
diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c
index 63fae82aba..fe2c643c34 100644
--- a/src/backend/nodes/outfuncs.c
+++ b/src/backend/nodes/outfuncs.c
@@ -2763,6 +2763,7 @@ _outA_Indices(StringInfo str, const A_Indices *node)
 {
 	WRITE_NODE_TYPE("A_INDICES");
 
+	WRITE_BOOL_FIELD(is_slice);
 	WRITE_NODE_FIELD(lidx);
 	WRITE_NODE_FIELD(uidx);
 }