Support numeric keys in MAP type

.gitignore

@@ -330,3 +330,4 @@ ASALocalRun/
 .mfractor/
 
 target/
+.vscode/

Cargo.toml

@@ -1,7 +1,7 @@
 [workspace]
 members = [
-    "pq2json"
-	]
+  "pq2json"
+]
 
 [profile.dev]
 

Package.nuspec

@@ -2,14 +2,14 @@
 <package >
   <metadata>
     <id>pq2json</id>
-    <version>0.1.6</version>
+    <version>0.1.7</version>
     <authors>Evgeney Ryzhyk</authors>
     <owners>Evgeney Ryzhyk</owners>
     <license type="expression">MIT</license>
     <projectUrl>https://github.com/Azure/azure-kusto-parquet-conv</projectUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <description>Parquet to JSON (line delimited) converter tool.</description>
-    <releaseNotes>Add --cslschema option for returning Kusto-compatible schema.</releaseNotes>
+    <releaseNotes>Support numeric keys in MAP type</releaseNotes>
     <copyright>Copyright 2020</copyright>
     <tags></tags>
     <dependencies></dependencies>

README.md

@@ -2,11 +2,7 @@ Parquet to JSON (line delimited) converter tool.
 
 # Building
 
-Requires nightly Rust, tested with `1.37.0-nightly (de7c4e423 2019-06-23)`:
-
-`rustup toolchain add nightly`
-
-`cargo +nightly build --release`
+`cargo build --release`
 
 # Running
 

pq2json/Cargo.toml

@@ -13,4 +13,4 @@ serde_json = "1"
 num-bigint = "0.2"
 chrono = "0.4"
 csv = "1.1.4"
-ryu = "1.0"
+ryu = "1.0"

pq2json/src/converter.rs

@@ -215,9 +215,19 @@ fn map_to_value(settings: &Settings, map: &Map) -> Result<Value, Box<dyn Error>>
     for i in 0..map.len() {
         let key_ty = keys.get_element_type(i);
         let key = match key_ty {
+            FieldType::Null => String::from("null"),
+            FieldType::Bool => keys.get_bool(i)?.to_string(),
+            FieldType::Byte => keys.get_byte(i)?.to_string(),
+            FieldType::Short => keys.get_short(i)?.to_string(),
+            FieldType::Int => keys.get_int(i)?.to_string(),
+            FieldType::Long => keys.get_long(i)?.to_string(),
+            FieldType::UByte => keys.get_ubyte(i)?.to_string(),
+            FieldType::UShort => keys.get_ushort(i)?.to_string(),
+            FieldType::UInt => keys.get_uint(i)?.to_string(),
+            FieldType::ULong => keys.get_ulong(i)?.to_string(),
             FieldType::Str => keys.get_string(i)?.to_string(),
             // TODO: return error here
-            _ => panic!("Non-string key"),
+            _ => panic!("Unsupported map key"),
         };
 
         let val_ty = values.get_element_type(i);