diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/001/regexp_matches.000.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/001/regexp_matches.000.ddl.sqlpp
new file mode 100644
index 0000000..dda55b0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/001/regexp_matches.000.ddl.sqlpp
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+use test;
+
+drop type test if exists;
+create type test as open {
+id: int32
+};
+
+drop dataset test if exists;
+create dataset test(test) primary key id;
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/001/regexp_matches.001.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/001/regexp_matches.001.update.sqlpp
new file mode 100644
index 0000000..e15e988
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/001/regexp_matches.001.update.sqlpp
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into test([
+{"id": 1, "f1": "So, 'twas better Betty Botter bought a bit of better butter", "f2": "\\b[Bb]\\w+"},
+{"id": 2, "f1": "So, 'twas better Betty Botter bought a bit of better butter", "f2": "\\b[Bb]\\w+ \\b[Bb]\\w+"},
+{"id": 3, "f1": "abracadabra", "f2": "[abc]"},
+{"id": 4, "f1": "abc", "f2": ""},
+{"id": 5, "f1": "abc", "f2": "123"},
+{"id": 6, "f1": "", "f2": ""}
+]);
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/001/regexp_matches.002.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/001/regexp_matches.002.query.sqlpp
new file mode 100644
index 0000000..83f2d9a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/001/regexp_matches.002.query.sqlpp
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select value regexp_matches(f1, f2) from test order by id asc;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/001/regexp_matches.003.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/001/regexp_matches.003.ddl.sqlpp
new file mode 100644
index 0000000..269f673
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/001/regexp_matches.003.ddl.sqlpp
@@ -0,0 +1,20 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test;
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/002/regexp_matches.000.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/002/regexp_matches.000.ddl.sqlpp
new file mode 100644
index 0000000..dda55b0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/002/regexp_matches.000.ddl.sqlpp
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+use test;
+
+drop type test if exists;
+create type test as open {
+id: int32
+};
+
+drop dataset test if exists;
+create dataset test(test) primary key id;
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/002/regexp_matches.001.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/002/regexp_matches.001.update.sqlpp
new file mode 100644
index 0000000..d77abf0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/002/regexp_matches.001.update.sqlpp
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into test([
+{"id": 1, "f1": missing, "f2": null},
+{"id": 2, "f1": null, "f2": missing},
+{"id": 3, "f1": null, "f2": "[abc]"},
+{"id": 4, "f1": 13, "f2": ""},
+{"id": 5, "f1": "abc", "f2": true}
+]);
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/002/regexp_matches.002.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/002/regexp_matches.002.query.sqlpp
new file mode 100644
index 0000000..2ae8bbb
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/002/regexp_matches.002.query.sqlpp
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select value [
+(select value regexp_matches(f1, f2) is missing from test where id = 1)[0],
+(select value regexp_matches(f1, f2) is missing from test where id = 2)[0],
+(select value regexp_matches(f1, f2) is null from test where id = 3)[0],
+(select value regex_matches(f1, f2) is null from test where id = 4)[0],
+(select value regex_matches(f1, f2) is null from test where id = 5)[0]
+];
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/002/regexp_matches.003.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/002/regexp_matches.003.ddl.sqlpp
new file mode 100644
index 0000000..269f673
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/002/regexp_matches.003.ddl.sqlpp
@@ -0,0 +1,20 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test;
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/003/regexp_matches.000.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/003/regexp_matches.000.query.sqlpp
new file mode 100644
index 0000000..a387704
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/003/regexp_matches.000.query.sqlpp
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+[
+regexp_matches("So, 'twas better Betty Botter bought a bit of better butter", "\\b[Bb]\\w+"),
+regexp_matches("So, 'twas better Betty Botter bought a bit of better butter", "\\b[Bb]\\w+ \\b[Bb]\\w+"),
+regexp_matches("abracadabra", "[abc]"),
+regex_matches("abc", ""),
+regex_matches("abc", "123"),
+regex_matches("", "")
+];
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/004/regexp_matches.000.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/004/regexp_matches.000.query.sqlpp
new file mode 100644
index 0000000..f127ce3
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_matches/004/regexp_matches.000.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+[
+regexp_matches(missing, null) is missing,
+regexp_matches(null, missing) is missing,
+regexp_matches(null, "[abc]") is null,
+regexp_matches(13, "") is null,
+regexp_matches("abc", true) is null
+];
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/001/regexp_split.000.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/001/regexp_split.000.ddl.sqlpp
new file mode 100644
index 0000000..dda55b0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/001/regexp_split.000.ddl.sqlpp
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+use test;
+
+drop type test if exists;
+create type test as open {
+id: int32
+};
+
+drop dataset test if exists;
+create dataset test(test) primary key id;
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/001/regexp_split.001.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/001/regexp_split.001.update.sqlpp
new file mode 100644
index 0000000..d4f38c5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/001/regexp_split.001.update.sqlpp
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into test([
+{"id": 1, "f1": "C:\\Program Files\\asterixdb\\server\\bin", "f2": "[\\\\]"},
+{"id": 2, "f1": "/opt/asterixdb/bin", "f2": "/"},
+{"id": 3, "f1": "a + b - c * d / e < f > g >= h <= i == j", "f2": "\\s*[a-zA-Z]+\\s*"},
+{"id": 4, "f1": "abc", "f2": ""},
+{"id": 5, "f1": "abc", "f2": "/"},
+{"id": 6, "f1": "", "f2": ""},
+{"id": 7, "f1": "", "f2": "1"},
+{"id": 8, "f1": "1", "f2": ""},
+{"id": 9, "f1": "1", "f2": "2"},
+{"id": 10, "f1": "1", "f2": "1"},
+{"id": 11, "f1": "12", "f2": "1"},
+{"id": 12, "f1": "12", "f2": "2"},
+{"id": 13, "f1": "121", "f2": "2"}
+]);
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/001/regexp_split.002.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/001/regexp_split.002.query.sqlpp
new file mode 100644
index 0000000..897b20b
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/001/regexp_split.002.query.sqlpp
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select value regexp_split(f1, f2) from test order by id asc;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/001/regexp_split.003.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/001/regexp_split.003.ddl.sqlpp
new file mode 100644
index 0000000..269f673
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/001/regexp_split.003.ddl.sqlpp
@@ -0,0 +1,20 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test;
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/002/regexp_split.000.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/002/regexp_split.000.ddl.sqlpp
new file mode 100644
index 0000000..dda55b0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/002/regexp_split.000.ddl.sqlpp
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+use test;
+
+drop type test if exists;
+create type test as open {
+id: int32
+};
+
+drop dataset test if exists;
+create dataset test(test) primary key id;
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/002/regexp_split.001.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/002/regexp_split.001.update.sqlpp
new file mode 100644
index 0000000..d77abf0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/002/regexp_split.001.update.sqlpp
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into test([
+{"id": 1, "f1": missing, "f2": null},
+{"id": 2, "f1": null, "f2": missing},
+{"id": 3, "f1": null, "f2": "[abc]"},
+{"id": 4, "f1": 13, "f2": ""},
+{"id": 5, "f1": "abc", "f2": true}
+]);
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/002/regexp_split.002.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/002/regexp_split.002.query.sqlpp
new file mode 100644
index 0000000..bbb8b7b
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/002/regexp_split.002.query.sqlpp
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select value [
+(select value regexp_split(f1, f2) is missing from test where id = 1)[0],
+(select value regexp_split(f1, f2) is missing from test where id = 2)[0],
+(select value regexp_split(f1, f2) is null from test where id = 3)[0],
+(select value regexp_split(f1, f2) is null from test where id = 4)[0],
+(select value regexp_split(f1, f2) is null from test where id = 5)[0]
+];
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/002/regexp_split.003.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/002/regexp_split.003.ddl.sqlpp
new file mode 100644
index 0000000..269f673
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/002/regexp_split.003.ddl.sqlpp
@@ -0,0 +1,20 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test;
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/003/regexp_split.000.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/003/regexp_split.000.query.sqlpp
new file mode 100644
index 0000000..a48af93
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/003/regexp_split.000.query.sqlpp
@@ -0,0 +1,34 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+[
+regexp_split("C:\\Program Files\\asterixdb\\server\\bin", "[\\\\]"),
+regexp_split("/opt/asterixdb/bin", "/"),
+regexp_split("a + b - c * d / e < f > g >= h <= i == j", "\\s*[a-zA-Z]+\\s*"),
+regexp_split("abc", ""),
+regexp_split("abc", "/"),
+regexp_split("", ""),
+regex_split("", "1"),
+regex_split("1", ""),
+regex_split("1", "2"),
+regex_split("1", "1"),
+regex_split("12", "1"),
+regex_split("12", "2"),
+regex_split("121", "2")
+];
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/004/regexp_split.000.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/004/regexp_split.000.query.sqlpp
new file mode 100644
index 0000000..69d0ca7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/regexp_split/004/regexp_split.000.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+[
+regexp_split(missing, null) is missing,
+regexp_split(null, missing) is missing,
+regexp_split(null, "[abc]") is null,
+regexp_split(13, "") is null,
+regexp_split("abc", true) is null
+];
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_matches/001/regexp_matches.002.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_matches/001/regexp_matches.002.adm
new file mode 100644
index 0000000..1aa8d8c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_matches/001/regexp_matches.002.adm
@@ -0,0 +1,6 @@
+[ "better", "Betty", "Botter", "bought", "bit", "better", "butter" ]
+[ "better Betty", "Botter bought", "better butter" ]
+[ "a", "b", "a", "c", "a", "a", "b", "a" ]
+[ "", "", "", "" ]
+[  ]
+[ "" ]
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_matches/002/regexp_matches.002.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_matches/002/regexp_matches.002.adm
new file mode 100644
index 0000000..2f00e1d
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_matches/002/regexp_matches.002.adm
@@ -0,0 +1 @@
+[ true, true, true, true, true ]
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_matches/003/regexp_matches.000.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_matches/003/regexp_matches.000.adm
new file mode 100644
index 0000000..32f80be
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_matches/003/regexp_matches.000.adm
@@ -0,0 +1 @@
+[ [ "better", "Betty", "Botter", "bought", "bit", "better", "butter" ], [ "better Betty", "Botter bought", "better butter" ], [ "a", "b", "a", "c", "a", "a", "b", "a" ], [ "", "", "", "" ], [  ], [ "" ] ]
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_matches/004/regexp_matches.000.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_matches/004/regexp_matches.000.adm
new file mode 100644
index 0000000..2f00e1d
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_matches/004/regexp_matches.000.adm
@@ -0,0 +1 @@
+[ true, true, true, true, true ]
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_split/001/regexp_split.002.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_split/001/regexp_split.002.adm
new file mode 100644
index 0000000..96a4a2e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_split/001/regexp_split.002.adm
@@ -0,0 +1,13 @@
+[ "C:", "Program Files", "asterixdb", "server", "bin" ]
+[ "", "opt", "asterixdb", "bin" ]
+[ "", "+", "-", "*", "/", "<", ">", ">=", "<=", "==" ]
+[ "a", "b", "c" ]
+[ "abc" ]
+[ "" ]
+[ "" ]
+[ "1" ]
+[ "1" ]
+[  ]
+[ "", "2" ]
+[ "1" ]
+[ "1", "1" ]
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_split/002/regexp_split.002.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_split/002/regexp_split.002.adm
new file mode 100644
index 0000000..2f00e1d
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_split/002/regexp_split.002.adm
@@ -0,0 +1 @@
+[ true, true, true, true, true ]
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_split/003/regexp_split.000.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_split/003/regexp_split.000.adm
new file mode 100644
index 0000000..796e544
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_split/003/regexp_split.000.adm
@@ -0,0 +1 @@
+[ [ "C:", "Program Files", "asterixdb", "server", "bin" ], [ "", "opt", "asterixdb", "bin" ], [ "", "+", "-", "*", "/", "<", ">", ">=", "<=", "==" ], [ "a", "b", "c" ], [ "abc" ], [ "" ], [ "" ], [ "1" ], [ "1" ], [  ], [ "", "2" ], [ "1" ], [ "1", "1" ] ]
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_split/004/regexp_split.000.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_split/004/regexp_split.000.adm
new file mode 100644
index 0000000..2f00e1d
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/regexp_split/004/regexp_split.000.adm
@@ -0,0 +1 @@
+[ true, true, true, true, true ]
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
index 5bb68e0..201ec6b 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
@@ -9213,6 +9213,26 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="string">
+      <compilation-unit name="regexp_matches/001">
+        <output-dir compare="Text">regexp_matches/001</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="string">
+      <compilation-unit name="regexp_matches/002">
+        <output-dir compare="Text">regexp_matches/002</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="string">
+      <compilation-unit name="regexp_matches/003">
+        <output-dir compare="Text">regexp_matches/003</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="string">
+      <compilation-unit name="regexp_matches/004">
+        <output-dir compare="Text">regexp_matches/004</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="string">
       <compilation-unit name="regexp_position/offset0/regexp_position">
         <output-dir compare="Text">regexp_position/offset0/regexp_position</output-dir>
       </compilation-unit>
@@ -9333,6 +9353,26 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="string">
+      <compilation-unit name="regexp_split/001">
+        <output-dir compare="Text">regexp_split/001</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="string">
+      <compilation-unit name="regexp_split/002">
+        <output-dir compare="Text">regexp_split/002</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="string">
+      <compilation-unit name="regexp_split/003">
+        <output-dir compare="Text">regexp_split/003</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="string">
+      <compilation-unit name="regexp_split/004">
+        <output-dir compare="Text">regexp_split/004</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="string">
       <compilation-unit name="repeat">
         <output-dir compare="Text">repeat</output-dir>
       </compilation-unit>