diff --git a/sbroad-core/src/executor/engine/helpers.rs b/sbroad-core/src/executor/engine/helpers.rs
index 23c8bd428b392ec1cee1d82a14ebcd2082cadc07..93ceee0c4995cc6fe2c01d062fd66b4560b00804 100644
--- a/sbroad-core/src/executor/engine/helpers.rs
+++ b/sbroad-core/src/executor/engine/helpers.rs
@@ -81,7 +81,7 @@ pub fn normalize_name_for_space_api(s: &str) -> String {
 
 #[must_use]
 pub fn is_sharding_column_name(name: &str) -> bool {
-    name == "\"bucket_id\""
+    name == "\"bucket_id\"" || name == "bucket_id"
 }
 
 /// A helper function to encode the execution plan into a pair of binary data (see `Message`):
diff --git a/sbroad-core/src/executor/engine/mock.rs b/sbroad-core/src/executor/engine/mock.rs
index 46babe7568a784e409691e3b8d2a4cfda9876ae4..2abf65952d9c9c8c5d50c32db6c61f0c283c7782 100644
--- a/sbroad-core/src/executor/engine/mock.rs
+++ b/sbroad-core/src/executor/engine/mock.rs
@@ -309,8 +309,8 @@ impl RouterConfigurationMock {
         );
 
         let columns = vec![
-            Column::new("\"a\"", Type::Integer, ColumnRole::User),
-            Column::new("\"b\"", Type::Integer, ColumnRole::User),
+            Column::new("\"a\"", Type::Integer, ColumnRole::User, false),
+            Column::new("\"b\"", Type::Integer, ColumnRole::User, false),
         ];
         let sharding_key: &[&str] = &[];
         let primary_key: &[&str] = &["\"a\""];
diff --git a/sbroad-core/src/frontend/sql/ir/tests.rs b/sbroad-core/src/frontend/sql/ir/tests.rs
index 22624f4d9d2099fdeb3a3e46309e2847849d01c7..b4d7f30aaf584c91a363d515b1668984d4f9656b 100644
--- a/sbroad-core/src/frontend/sql/ir/tests.rs
+++ b/sbroad-core/src/frontend/sql/ir/tests.rs
@@ -2847,9 +2847,9 @@ fn front_sql_check_global_tbl_support() {
         "expected sharded table",
     );
     check_error(
-        r#"insert into "t3" select * from "global_t""#,
+        r#"insert into "global_t" values (1, 1)"#,
         metadata,
-        global_tbl_err!("Insert"),
+        "expected sharded table",
     );
     check_error(
         r#"delete from "global_t""#,
@@ -2869,13 +2869,17 @@ fn front_sql_check_global_tbl_support() {
     check_error(
         r#"select * from "global_t" where "a" in (select sum("a") from "t3")"#,
         metadata,
-        global_tbl_err!("Subquery in condition"),
+        global_tbl_err!("Subquery"),
+    );
+    check_error(
+        r#"select * from "t3" where "a" in (select "a" as "a1" from "global_t")"#,
+        metadata,
+        global_tbl_err!("Subquery"),
     );
 
     fn check_error(input: &str, metadata: &RouterConfigurationMock, expected_err: &str) {
         let err = build(input, metadata).unwrap_err();
 
-        println!("{}", err.to_string());
         assert_eq!(true, err.to_string().contains(expected_err));
 
         fn build(input: &str, metadata: &RouterConfigurationMock) -> Result<(), SbroadError> {
diff --git a/sbroad-core/src/ir/distribution.rs b/sbroad-core/src/ir/distribution.rs
index 4e1f8a19aa75f640f14fe98b61e9ff9f24eb7f47..cecd04c67b6a1ee37c2db829abd850e8aac29a76 100644
--- a/sbroad-core/src/ir/distribution.rs
+++ b/sbroad-core/src/ir/distribution.rs
@@ -120,23 +120,18 @@ impl Distribution {
         right: &Distribution,
     ) -> Result<Distribution, SbroadError> {
         let dist = match (left, right) {
-            (Distribution::Single, Distribution::Global)
-            | (Distribution::Global, Distribution::Single) => Distribution::Single,
-            (Distribution::Global, _) | (_, Distribution::Global) => {
-                return Err(SbroadError::Unsupported(
-                    Entity::Query,
-                    Some("union/except is not supported for global tables!".into())
-                ))
-            }
+            // Currently Global distribution may come
+            // only from Motion(Full). The check for
+            // reading from global tables is done in
+            // conflict resolution.
+            (Distribution::Global, _) => right.clone(),
+            (_, Distribution::Global) => left.clone(),
             (Distribution::Single, _) | (_, Distribution::Single) => {
                 return Err(SbroadError::Invalid(
                     Entity::Distribution,
                     Some(format!("union/except child has unexpected distribution Single. Left: {left:?}, right: {right:?}"))));
             }
             (Distribution::Any, _) | (_, Distribution::Any) => Distribution::Any,
-            (Distribution::Global, _) | (_, Distribution::Global) => {
-                unimplemented!()
-            }
             (
                 Distribution::Segment {
                     keys: keys_left, ..
@@ -176,12 +171,6 @@ impl Distribution {
             (_, Distribution::Global) | (Distribution::Segment { .. }, Distribution::Any) => {
                 left.clone()
             }
-            (Distribution::Global, _) | (_, Distribution::Global) => {
-                return Err(SbroadError::Unsupported(
-                    Entity::Query,
-                    Some("join is not supported for global tables!".into())
-                ))
-            }
             (
                 Distribution::Segment {
                     keys: ref keys_left,
diff --git a/sbroad-core/src/ir/relation.rs b/sbroad-core/src/ir/relation.rs
index 04d8be0a45b618d1cc7e937ce72ee1573c0f193a..a81e556f0b56bfc27a7303469a7b9170138de77b 100644
--- a/sbroad-core/src/ir/relation.rs
+++ b/sbroad-core/src/ir/relation.rs
@@ -395,7 +395,10 @@ pub struct Table {
 
 #[derive(Clone, Debug, Deserialize, PartialEq, Eq, Serialize)]
 pub enum TableKind {
-    ShardedSpace { shard_key: Key, engine: SpaceEngine },
+    ShardedSpace {
+        sharding_key: Key,
+        engine: SpaceEngine,
+    },
     GlobalSpace,
     SystemSpace,
 }
@@ -468,7 +471,7 @@ impl Table {
                 })
                 .collect::<Result<Vec<usize>, _>>()?;
             TableKind::ShardedSpace {
-                shard_key: Key::new(shard_positions),
+                sharding_key: Key::new(shard_positions),
                 engine,
             }
         };
@@ -524,7 +527,11 @@ impl Table {
             ));
         }
 
-        if let TableKind::ShardedSpace { shard_key, .. } = &table.kind {
+        if let TableKind::ShardedSpace {
+            sharding_key: shard_key,
+            ..
+        } = &table.kind
+        {
             let in_range = shard_key.positions.iter().all(|pos| *pos < cols.len());
 
             if !in_range {
@@ -611,7 +618,10 @@ impl Table {
     /// - The table is global
     pub fn get_sk(&self) -> Result<&[usize], SbroadError> {
         match &self.kind {
-            TableKind::ShardedSpace { shard_key, .. } => Ok(&shard_key.positions),
+            TableKind::ShardedSpace {
+                sharding_key: shard_key,
+                ..
+            } => Ok(&shard_key.positions),
             TableKind::GlobalSpace | TableKind::SystemSpace => Err(SbroadError::Invalid(
                 Entity::Table,
                 Some(format!("expected sharded table. Name: {}", self.name)),
diff --git a/sbroad-core/src/ir/relation/tests.rs b/sbroad-core/src/ir/relation/tests.rs
index b5c1144bbe077445b721a1e97e4e379274db80db..b4c7c90f0a8069a0038eae9d827eb71a9144637f 100644
--- a/sbroad-core/src/ir/relation/tests.rs
+++ b/sbroad-core/src/ir/relation/tests.rs
@@ -235,7 +235,7 @@ fn table_seg_serialized_no_key() {
     assert_eq!(t.unwrap_err(), SbroadError::FailedTo(
         Action::Serialize,
         Some(Entity::Table),
-        "Message(\"invalid type: unit value, expected struct Key\", Some(Pos { marker: Marker { index: 118, line: 10, col: 15 }, path: \"kind.ShardedSpace.shard_key\" }))".into()),
+        "Message(\"invalid type: unit value, expected struct Key\", Some(Pos { marker: Marker { index: 121, line: 10, col: 18 }, path: \"kind.ShardedSpace.sharding_key\" }))".into()),
     );
 }
 
diff --git a/sbroad-core/src/ir/transformation/redistribution.rs b/sbroad-core/src/ir/transformation/redistribution.rs
index 0e745e50be6c24a149b5653ec1ef87b0acda449b..d7c89a8b6e7dcafb9ef4850114f53c62ae2b4a62 100644
--- a/sbroad-core/src/ir/transformation/redistribution.rs
+++ b/sbroad-core/src/ir/transformation/redistribution.rs
@@ -10,6 +10,7 @@ use crate::ir::distribution::{Distribution, Key, KeySet};
 use crate::ir::expression::Expression;
 use crate::ir::operator::{Bool, JoinKind, Relational, Unary, UpdateStrategy};
 
+use crate::ir::relation::TableKind;
 use crate::ir::transformation::redistribution::eq_cols::EqualityCols;
 use crate::ir::tree::traversal::{
     BreadthFirst, LevelNode, PostOrder, PostOrderWithFilter, EXPR_CAPACITY, REL_CAPACITY,
@@ -523,17 +524,6 @@ impl Plan {
         let bool_op = BoolOp::from_expr(self, op_id)?;
         let left = self.get_additional_sq(rel_id, bool_op.left)?;
         let right = self.get_additional_sq(rel_id, bool_op.right)?;
-        let is_global_child = {
-            let d = self.get_distribution(
-                self.get_relational_output(self.get_relational_child(rel_id, 0)?)?,
-            )?;
-            matches!(d, Distribution::Global)
-        };
-        if (left.is_some() || right.is_some()) && is_global_child {
-            return Err(SbroadError::UnsupportedOpForGlobalTables(
-                "Subquery in condition".to_string(),
-            ));
-        }
         match left {
             Some(left_sq) => {
                 match right {
@@ -960,12 +950,7 @@ impl Plan {
     pub(crate) fn check_global_tbl_support(&self, rel_id: usize) -> Result<(), SbroadError> {
         let node = self.get_relation_node(rel_id)?;
         match node {
-            Relational::Delete { .. }
-            | Relational::Insert { .. }
-            | Relational::Update { .. }
-            | Relational::Values { .. }
-            | Relational::GroupBy { .. }
-            | Relational::Having { .. } => {
+            Relational::Values { .. } | Relational::GroupBy { .. } | Relational::Having { .. } => {
                 let child_dist = self.get_distribution(
                     self.get_relational_output(self.get_relational_child(rel_id, 0)?)?,
                 )?;
@@ -975,6 +960,21 @@ impl Plan {
                     ));
                 }
             }
+            Relational::Delete { relation, .. }
+            | Relational::Update { relation, .. }
+            | Relational::Insert { relation, .. } => {
+                // Reading from global table for dml is allowed,
+                // but updating/inserting/deleting from global table
+                // is not: it must be done via cas picodata api.
+                if matches!(
+                    self.get_relation_or_error(relation.as_str())?.kind,
+                    TableKind::GlobalSpace
+                ) {
+                    return Err(SbroadError::UnsupportedOpForGlobalTables(
+                        node.name().into(),
+                    ));
+                }
+            }
             Relational::UnionAll { .. } | Relational::Except { .. } | Relational::Join { .. } => {
                 let left_dist = self.get_distribution(
                     self.get_relational_output(self.get_relational_child(rel_id, 0)?)?,
@@ -991,10 +991,27 @@ impl Plan {
                     ));
                 }
             }
+            Relational::Selection { children, .. } => {
+                // Currently only Projection + Selection without SQs is supported.
+                let has_sq = children.len() > 1;
+                if has_sq {
+                    let child_dist = self.get_distribution(
+                        self.get_relational_output(self.get_relational_child(rel_id, 0)?)?,
+                    )?;
+                    let sq_dist = self.get_distribution(
+                        self.get_relational_output(self.get_relational_child(rel_id, 1)?)?,
+                    )?;
+                    if matches!(
+                        (child_dist, sq_dist),
+                        (Distribution::Global, _) | (_, Distribution::Global)
+                    ) {
+                        return Err(SbroadError::UnsupportedOpForGlobalTables("Subquery".into()));
+                    }
+                }
+            }
             Relational::Projection { .. }
             | Relational::ScanRelation { .. }
             | Relational::ValuesRow { .. }
-            | Relational::Selection { .. }
             | Relational::ScanSubQuery { .. }
             | Relational::Motion { .. } => {}
         }
@@ -1143,7 +1160,7 @@ impl Plan {
                             return Err(SbroadError::Unsupported(
                                 Entity::Operator,
                                 Some("unsupported boolean operation, expected And or Or".into()),
-                            ))
+                            ));
                         }
                     }
                 }
@@ -1182,7 +1199,7 @@ impl Plan {
                     return Err(SbroadError::Unsupported(
                         Entity::Operator,
                         Some("unsupported boolean operation".into()),
-                    ))
+                    ));
                 }
             };
             inner_map.insert(node_id, new_inner_policy.clone());
@@ -1641,7 +1658,7 @@ impl Plan {
                             }
                             let key = left_keys.iter().next().ok_or_else(|| SbroadError::Invalid(
                                 Entity::Distribution,
-                                Some("left child's segment distribution is invalid: no keys found in the set".into())
+                                Some("left child's segment distribution is invalid: no keys found in the set".into()),
                             ))?;
                             map.add_child(
                                 *right,
diff --git a/sbroad-core/tests/artifactory/backend/sql/tree/arbitrary_projection_plan.yaml b/sbroad-core/tests/artifactory/backend/sql/tree/arbitrary_projection_plan.yaml
index 976af00e09e592c7fe50d5d00bbc3f928579e449..c3fd63a7d7855518d1ddde36916543ce165e248b 100644
--- a/sbroad-core/tests/artifactory/backend/sql/tree/arbitrary_projection_plan.yaml
+++ b/sbroad-core/tests/artifactory/backend/sql/tree/arbitrary_projection_plan.yaml
@@ -199,7 +199,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/backend/sql/tree/arithmetic_projection_plan.yaml b/sbroad-core/tests/artifactory/backend/sql/tree/arithmetic_projection_plan.yaml
index 057bc046d9b1acd092bfe5569b8be1881dcc58da..8c92fd55c840055796d99a4637492380bd7128f7 100644
--- a/sbroad-core/tests/artifactory/backend/sql/tree/arithmetic_projection_plan.yaml
+++ b/sbroad-core/tests/artifactory/backend/sql/tree/arithmetic_projection_plan.yaml
@@ -272,7 +272,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/backend/sql/tree/arithmetic_selection_plan.yaml b/sbroad-core/tests/artifactory/backend/sql/tree/arithmetic_selection_plan.yaml
index 8939c0f4f46832fd64f24d4136e08dc8389e2840..2c05c97084470741980741354e001f3c4263952e 100644
--- a/sbroad-core/tests/artifactory/backend/sql/tree/arithmetic_selection_plan.yaml
+++ b/sbroad-core/tests/artifactory/backend/sql/tree/arithmetic_selection_plan.yaml
@@ -404,7 +404,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/backend/sql/tree/sql_order_selection.yaml b/sbroad-core/tests/artifactory/backend/sql/tree/sql_order_selection.yaml
index 4dc4cad72bc88c827c1729b42d17f4176e34cbee..04e6a7d25c25c2f4c395bd7954f46a85f877e9a3 100644
--- a/sbroad-core/tests/artifactory/backend/sql/tree/sql_order_selection.yaml
+++ b/sbroad-core/tests/artifactory/backend/sql/tree/sql_order_selection.yaml
@@ -119,7 +119,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/distribution/join_unite_keys.yaml b/sbroad-core/tests/artifactory/ir/distribution/join_unite_keys.yaml
index f3cd5170a2e3c770dc6c5a9138c0767ffab9b646..dfd291714c92e94a98ceffb3de71d1241ae163f5 100644
--- a/sbroad-core/tests/artifactory/ir/distribution/join_unite_keys.yaml
+++ b/sbroad-core/tests/artifactory/ir/distribution/join_unite_keys.yaml
@@ -172,7 +172,7 @@ relations:
       name: t2
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 1
           engine: Memtx
@@ -188,7 +188,7 @@ relations:
       name: t1
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/distribution/shrink_dist_key_1.yaml b/sbroad-core/tests/artifactory/ir/distribution/shrink_dist_key_1.yaml
index 2104ba9f18aa404634fb6385f4a08d9b0f560a61..3ab0b75a2ca74724ac238a7da75ea8e419268134 100644
--- a/sbroad-core/tests/artifactory/ir/distribution/shrink_dist_key_1.yaml
+++ b/sbroad-core/tests/artifactory/ir/distribution/shrink_dist_key_1.yaml
@@ -105,7 +105,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 1
               - 0
diff --git a/sbroad-core/tests/artifactory/ir/distribution/shrink_dist_key_2.yaml b/sbroad-core/tests/artifactory/ir/distribution/shrink_dist_key_2.yaml
index 7ff2b81f09f078df55de7c416dde676ce6095b7d..ac1e8928f41933cece44ad608da96da284a5efc0 100644
--- a/sbroad-core/tests/artifactory/ir/distribution/shrink_dist_key_2.yaml
+++ b/sbroad-core/tests/artifactory/ir/distribution/shrink_dist_key_2.yaml
@@ -93,7 +93,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 1
               - 0
diff --git a/sbroad-core/tests/artifactory/ir/distribution/shuffle_dist_key.yaml b/sbroad-core/tests/artifactory/ir/distribution/shuffle_dist_key.yaml
index 894c9877ae1283ddd0e1d8ed6823816c7f7eade0..e42bf59c5f69543957a4afff0a36a91bf2448e02 100644
--- a/sbroad-core/tests/artifactory/ir/distribution/shuffle_dist_key.yaml
+++ b/sbroad-core/tests/artifactory/ir/distribution/shuffle_dist_key.yaml
@@ -105,7 +105,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 1
               - 0
diff --git a/sbroad-core/tests/artifactory/ir/distribution/union_fallback_to_random.yaml b/sbroad-core/tests/artifactory/ir/distribution/union_fallback_to_random.yaml
index 244b1324f47958b8dbfbcdc2cbf39b26e96a6ee4..d64da381e05c421ebebf7c9b618bbf2990e75bf6 100644
--- a/sbroad-core/tests/artifactory/ir/distribution/union_fallback_to_random.yaml
+++ b/sbroad-core/tests/artifactory/ir/distribution/union_fallback_to_random.yaml
@@ -111,7 +111,7 @@ relations:
       name: t1
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
@@ -127,7 +127,7 @@ relations:
       name: t2
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 1
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/distribution/union_preserve_dist.yaml b/sbroad-core/tests/artifactory/ir/distribution/union_preserve_dist.yaml
index e5d68cf031adfb0402527ba2fb2dc1f55fc51ba1..b4a7d0a76cf61c1aafdd05c43c3151166621b67f 100644
--- a/sbroad-core/tests/artifactory/ir/distribution/union_preserve_dist.yaml
+++ b/sbroad-core/tests/artifactory/ir/distribution/union_preserve_dist.yaml
@@ -111,7 +111,7 @@ relations:
       name: t1
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
@@ -127,7 +127,7 @@ relations:
       name: t2
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/operator/join.yaml b/sbroad-core/tests/artifactory/ir/operator/join.yaml
index c4fd29e1b1ea9f9dc2c69089e3c70431b6b6845b..bad216b002b311433b174133e5c551f1353e8251 100644
--- a/sbroad-core/tests/artifactory/ir/operator/join.yaml
+++ b/sbroad-core/tests/artifactory/ir/operator/join.yaml
@@ -172,7 +172,7 @@ relations:
       name: t2
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 1
           engine: Memtx
@@ -188,7 +188,7 @@ relations:
       name: t1
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/operator/output_aliases.yaml b/sbroad-core/tests/artifactory/ir/operator/output_aliases.yaml
index 138aa6be9953182a97f9b87d0270cadf84da48f6..650ebfbdd0e6eccd4f4df79206aedb00d99764a8 100644
--- a/sbroad-core/tests/artifactory/ir/operator/output_aliases.yaml
+++ b/sbroad-core/tests/artifactory/ir/operator/output_aliases.yaml
@@ -40,7 +40,7 @@ relations:
         type: Number
       - name: b
         type: Number
-    shard_key:
+    sharding_key:
       positions:
         - 0
     primary_key:
diff --git a/sbroad-core/tests/artifactory/ir/operator/output_aliases_duplicates.yaml b/sbroad-core/tests/artifactory/ir/operator/output_aliases_duplicates.yaml
index 258c84feab8ad2e04130c5973ad107ae64701950..ebde2db8eac0acbfc8613b0022c84893029ece5b 100644
--- a/sbroad-core/tests/artifactory/ir/operator/output_aliases_duplicates.yaml
+++ b/sbroad-core/tests/artifactory/ir/operator/output_aliases_duplicates.yaml
@@ -40,7 +40,7 @@ relations:
         type: Number
       - name: b
         type: Number
-    shard_key:
+    sharding_key:
       positions:
         - 0
     primary_key:
diff --git a/sbroad-core/tests/artifactory/ir/operator/output_aliases_oor.yaml b/sbroad-core/tests/artifactory/ir/operator/output_aliases_oor.yaml
index 0e48585b793af75d7cdbcf5754e63ca85a2fff59..a7ebb683c402ea9500b42a65c3dbc6a124258312 100644
--- a/sbroad-core/tests/artifactory/ir/operator/output_aliases_oor.yaml
+++ b/sbroad-core/tests/artifactory/ir/operator/output_aliases_oor.yaml
@@ -30,7 +30,7 @@ relations:
         type: Number
       - name: b
         type: Number
-    shard_key:
+    sharding_key:
       positions:
         - 0
     primary_key:
diff --git a/sbroad-core/tests/artifactory/ir/operator/output_aliases_unsupported_type.yaml b/sbroad-core/tests/artifactory/ir/operator/output_aliases_unsupported_type.yaml
index adce5a27f5e3abe3e740494df43842bead16798d..83339092329327d720dfe4edc96f7cda35ba73bc 100644
--- a/sbroad-core/tests/artifactory/ir/operator/output_aliases_unsupported_type.yaml
+++ b/sbroad-core/tests/artifactory/ir/operator/output_aliases_unsupported_type.yaml
@@ -36,7 +36,7 @@ relations:
         type: Number
       - name: b
         type: Number
-    shard_key:
+    sharding_key:
       positions:
         - 0
     primary_key:
diff --git a/sbroad-core/tests/artifactory/ir/operator/projection.yaml b/sbroad-core/tests/artifactory/ir/operator/projection.yaml
index c4e0bf9ffd180ada6159b32240154f6cbe616e55..0423db664d523b2816abd739c76b491751acdf25 100644
--- a/sbroad-core/tests/artifactory/ir/operator/projection.yaml
+++ b/sbroad-core/tests/artifactory/ir/operator/projection.yaml
@@ -78,7 +78,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/operator/scan_rel.yaml b/sbroad-core/tests/artifactory/ir/operator/scan_rel.yaml
index feec5181b86b1883915cca50841d274c4969c53c..303b5686d36f86a43005e4bee1cd86452527d400 100644
--- a/sbroad-core/tests/artifactory/ir/operator/scan_rel.yaml
+++ b/sbroad-core/tests/artifactory/ir/operator/scan_rel.yaml
@@ -77,7 +77,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 1
               - 0
diff --git a/sbroad-core/tests/artifactory/ir/operator/selection.yaml b/sbroad-core/tests/artifactory/ir/operator/selection.yaml
index 0ff6f832ec65562e846b9904755dff7718c91c6c..23241ad4187a8bc22016a74dc792266a8f6c2b18 100644
--- a/sbroad-core/tests/artifactory/ir/operator/selection.yaml
+++ b/sbroad-core/tests/artifactory/ir/operator/selection.yaml
@@ -159,7 +159,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 1
               - 0
diff --git a/sbroad-core/tests/artifactory/ir/operator/selection_with_sub_query.yaml b/sbroad-core/tests/artifactory/ir/operator/selection_with_sub_query.yaml
index 54836235e6c616e1f9e97160a59eca3e5406ee88..832d8977c8c514c20314e643f1df6e3aaeb1ceed 100644
--- a/sbroad-core/tests/artifactory/ir/operator/selection_with_sub_query.yaml
+++ b/sbroad-core/tests/artifactory/ir/operator/selection_with_sub_query.yaml
@@ -150,7 +150,7 @@ relations:
       name: t1
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
@@ -164,7 +164,7 @@ relations:
       name: t2
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/operator/sub_query.yaml b/sbroad-core/tests/artifactory/ir/operator/sub_query.yaml
index 602eaf9b2fe2c773bb30cf062db309e73910068f..2193f621988692470909672829ceb5af97078ca5 100644
--- a/sbroad-core/tests/artifactory/ir/operator/sub_query.yaml
+++ b/sbroad-core/tests/artifactory/ir/operator/sub_query.yaml
@@ -80,7 +80,7 @@ relations:
           type: Boolean
         - name: b
           type: Number
-      shard_key:
+      sharding_key:
         positions:
           - 0
       primary_key:
@@ -89,7 +89,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/plan_no_top.yaml b/sbroad-core/tests/artifactory/ir/plan_no_top.yaml
index eead839c39af7d88868b1bbffd500865321c369a..59e0b3318e75c9b104150a95b10059d0abd1cdcb 100644
--- a/sbroad-core/tests/artifactory/ir/plan_no_top.yaml
+++ b/sbroad-core/tests/artifactory/ir/plan_no_top.yaml
@@ -36,7 +36,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/plan_oor_top.yaml b/sbroad-core/tests/artifactory/ir/plan_oor_top.yaml
index 6af8e87e8fb7288cf8031befc2e1939c3bb5a625..036abe88d29c4b9289c91dd219c447cc63be5712 100644
--- a/sbroad-core/tests/artifactory/ir/plan_oor_top.yaml
+++ b/sbroad-core/tests/artifactory/ir/plan_oor_top.yaml
@@ -36,7 +36,7 @@ relations:
       name: t
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized.yaml b/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized.yaml
index 2a25283f7d8981dfbcd32aa99a848236572af40d..3e09b693a838c4218ad171854fe4f898a312061e 100644
--- a/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized.yaml
+++ b/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized.yaml
@@ -18,7 +18,7 @@ primary_key:
     - 3
 kind:
   ShardedSpace:
-    shard_key:
+    sharding_key:
       positions:
         - 0
         - 3
diff --git a/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_duplicate_columns.yaml b/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_duplicate_columns.yaml
index a1d9b073e817e63682992517c324b214700ddf33..a13be3a2027ed814bdc3b0fee5bea5559d55a91d 100644
--- a/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_duplicate_columns.yaml
+++ b/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_duplicate_columns.yaml
@@ -11,7 +11,7 @@ primary_key:
     - 0
 kind:
   ShardedSpace:
-    shard_key:
+    sharding_key:
       positions:
         - 0
     engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_no_columns.yaml b/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_no_columns.yaml
index f43c57023344204e53926293c1c5e4f477e11c93..66f8d7de6fa657d194066e3462aeadf60e788a4b 100644
--- a/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_no_columns.yaml
+++ b/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_no_columns.yaml
@@ -1,6 +1,6 @@
 columns: ~
 name: t
-shard_key:
+sharding_key:
   positions:
     - 0
 primary_key:
diff --git a/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_no_key.yaml b/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_no_key.yaml
index 03acb99cb425d4a4d862b9ab2e64426280ebfeef..6f9dd48d35d38043aaad07f2c10050ceed1885e3 100644
--- a/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_no_key.yaml
+++ b/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_no_key.yaml
@@ -7,5 +7,5 @@ primary_key:
     - 0
 kind:
   ShardedSpace:
-    shard_key: ~
+    sharding_key: ~
     engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_out_of_range_key.yaml b/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_out_of_range_key.yaml
index 9a54ed96f7fa6798fc0ec7560bf658c9f660d294..7cfbf0b23af4d7b74e72b6b989524b4baa3f4c5d 100644
--- a/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_out_of_range_key.yaml
+++ b/sbroad-core/tests/artifactory/ir/relation/table_seg_serialized_out_of_range_key.yaml
@@ -7,7 +7,7 @@ primary_key:
     - 0
 kind:
   ShardedSpace:
-    shard_key:
+    sharding_key:
       positions:
         - 10
     engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/transformation/redistribution/full_motion_less_for_sub_query.yaml b/sbroad-core/tests/artifactory/ir/transformation/redistribution/full_motion_less_for_sub_query.yaml
index 58d460ec78d3d2f760466b6ae9bb0fbcc0725f97..b885c537809c4384a7c271fa243fe75ad72daf01 100644
--- a/sbroad-core/tests/artifactory/ir/transformation/redistribution/full_motion_less_for_sub_query.yaml
+++ b/sbroad-core/tests/artifactory/ir/transformation/redistribution/full_motion_less_for_sub_query.yaml
@@ -200,7 +200,7 @@ relations:
       name: t2
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Vinyl
@@ -214,7 +214,7 @@ relations:
       name: t1
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Vinyl
diff --git a/sbroad-core/tests/artifactory/ir/transformation/redistribution/full_motion_non_segment_outer_for_sub_query.yaml b/sbroad-core/tests/artifactory/ir/transformation/redistribution/full_motion_non_segment_outer_for_sub_query.yaml
index fb26f5ddf8b37ec74396d9c19001f6405c30a0f2..13d0ea7aa6ede6b4b4407ec8bb0d943d2030c4d3 100644
--- a/sbroad-core/tests/artifactory/ir/transformation/redistribution/full_motion_non_segment_outer_for_sub_query.yaml
+++ b/sbroad-core/tests/artifactory/ir/transformation/redistribution/full_motion_non_segment_outer_for_sub_query.yaml
@@ -220,7 +220,7 @@ relations:
       name: t1
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Vinyl
@@ -234,7 +234,7 @@ relations:
       name: t2
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Vinyl
diff --git a/sbroad-core/tests/artifactory/ir/transformation/redistribution/local_sub_query.yaml b/sbroad-core/tests/artifactory/ir/transformation/redistribution/local_sub_query.yaml
index 823725f5003f971bf987c5bddcf4c8acd442519c..01167fd074766725de015d4aa16286527b83edf7 100644
--- a/sbroad-core/tests/artifactory/ir/transformation/redistribution/local_sub_query.yaml
+++ b/sbroad-core/tests/artifactory/ir/transformation/redistribution/local_sub_query.yaml
@@ -175,7 +175,7 @@ relations:
       name: t1
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
@@ -189,7 +189,7 @@ relations:
       name: t2
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/transformation/redistribution/multiple_sub_queries.yaml b/sbroad-core/tests/artifactory/ir/transformation/redistribution/multiple_sub_queries.yaml
index 8fa314e63cb15f966aae77f539933225a4991b33..6d987410864e8ae95a91736905e89a1e425df52d 100644
--- a/sbroad-core/tests/artifactory/ir/transformation/redistribution/multiple_sub_queries.yaml
+++ b/sbroad-core/tests/artifactory/ir/transformation/redistribution/multiple_sub_queries.yaml
@@ -359,7 +359,7 @@ relations:
       name: t1
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
@@ -375,7 +375,7 @@ relations:
       name: t2
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
diff --git a/sbroad-core/tests/artifactory/ir/transformation/redistribution/segment_motion_for_sub_query.yaml b/sbroad-core/tests/artifactory/ir/transformation/redistribution/segment_motion_for_sub_query.yaml
index e66b2b4b1abb80563d680f4fd5d56b19e8a7e062..49d47415cbbcf5ed9a6e3f2daa76b1a21e3f0af9 100644
--- a/sbroad-core/tests/artifactory/ir/transformation/redistribution/segment_motion_for_sub_query.yaml
+++ b/sbroad-core/tests/artifactory/ir/transformation/redistribution/segment_motion_for_sub_query.yaml
@@ -209,7 +209,7 @@ relations:
       name: t1
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx
@@ -225,7 +225,7 @@ relations:
       name: t2
       kind:
         ShardedSpace:
-          shard_key:
+          sharding_key:
             positions:
               - 0
           engine: Memtx