Refactoring regexp_count

Cargo.toml

@@ -58,7 +58,7 @@ homepage = "https://datafusion.apache.org"
 license = "Apache-2.0"
 readme = "README.md"
 repository = "https://github.com/apache/datafusion"
-rust-version = "1.80"
+rust-version = "1.76"
 version = "41.0.0"
 
 [workspace.dependencies]

datafusion-cli/Cargo.toml

@@ -26,7 +26,7 @@ license = "Apache-2.0"
 homepage = "https://datafusion.apache.org"
 repository = "https://github.com/apache/datafusion"
 # Specify MSRV here as `cargo msrv` doesn't support workspace version
-rust-version = "1.80"
+rust-version = "1.76"
 readme = "README.md"
 
 [dependencies]

datafusion-examples/examples/regex_count.rs

@@ -0,0 +1,33 @@
+use datafusion::common::Result;
+use datafusion::prelude::{CsvReadOptions, SessionContext};
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    let ctx = SessionContext::new();
+    ctx.register_csv(
+        "examples",
+        "../../datafusion/physical-expr/tests/data/regex.csv",
+        CsvReadOptions::new(),
+    )
+    .await?;
+
+    //
+    //
+    //regexp_count examples
+    //
+    //
+    // regexp_count format is (regexp_count(text, regex[, flags])
+    //
+
+    // use sql and regexp_count function to test col 'values', against patterns in col 'patterns' without flags
+    let result = ctx
+        .sql("select regexp_count(values, patterns) from examples")
+        .await?
+        .collect()
+        .await?;
+
+    println!("{:?}", result);
+    assert_eq!(result.len(), 1);
+
+    Ok(())
+}

datafusion/core/Cargo.toml

@@ -30,7 +30,7 @@ authors = { workspace = true }
 # Specify MSRV here as `cargo msrv` doesn't support workspace version and fails with
 # "Unable to find key 'package.rust-version' (or 'package.metadata.msrv') in 'arrow-datafusion/Cargo.toml'"
 # https://github.com/foresterre/cargo-msrv/issues/590
-rust-version = "1.80"
+rust-version = "1.76"
 
 [lints]
 workspace = true