export both now and random functions (#389)

datafusion/src/logical_plan/expr.rs

@@ -1104,7 +1104,9 @@ unary_scalar_expr!(Acos, acos);
 unary_scalar_expr!(Atan, atan);
 unary_scalar_expr!(Floor, floor);
 unary_scalar_expr!(Ceil, ceil);
+unary_scalar_expr!(Now, now);
 unary_scalar_expr!(Round, round);
+unary_scalar_expr!(Random, random);
 unary_scalar_expr!(Trunc, trunc);
 unary_scalar_expr!(Abs, abs);
 unary_scalar_expr!(Signum, signum);

datafusion/src/logical_plan/mod.rs

@@ -36,11 +36,11 @@ pub use expr::{
     abs, acos, and, array, ascii, asin, atan, avg, binary_expr, bit_length, btrim, case,
     ceil, character_length, chr, col, combine_filters, concat, concat_ws, cos, count,
     count_distinct, create_udaf, create_udf, exp, exprlist_to_fields, floor, in_list,
-    initcap, left, length, lit, ln, log10, log2, lower, lpad, ltrim, max, md5, min,
-    octet_length, or, regexp_match, regexp_replace, repeat, replace, reverse, right,
-    round, rpad, rtrim, sha224, sha256, sha384, sha512, signum, sin, split_part, sqrt,
-    starts_with, strpos, substr, sum, tan, to_hex, translate, trim, trunc, upper, when,
-    Expr, ExprRewriter, ExpressionVisitor, Literal, Recursion,
+    initcap, left, length, lit, ln, log10, log2, lower, lpad, ltrim, max, md5, min, now,
+    octet_length, or, random, regexp_match, regexp_replace, repeat, replace, reverse,
+    right, round, rpad, rtrim, sha224, sha256, sha384, sha512, signum, sin, split_part,
+    sqrt, starts_with, strpos, substr, sum, tan, to_hex, translate, trim, trunc, upper,
+    when, Expr, ExprRewriter, ExpressionVisitor, Literal, Recursion,
 };
 pub use extension::UserDefinedLogicalNode;
 pub use operators::Operator;

datafusion/src/prelude.rs

@@ -30,8 +30,8 @@ pub use crate::execution::context::{ExecutionConfig, ExecutionContext};
 pub use crate::logical_plan::{
     array, ascii, avg, bit_length, btrim, character_length, chr, col, concat, concat_ws,
     count, create_udf, in_list, initcap, left, length, lit, lower, lpad, ltrim, max, md5,
-    min, octet_length, regexp_replace, repeat, replace, reverse, right, rpad, rtrim,
-    sha224, sha256, sha384, sha512, split_part, starts_with, strpos, substr, sum, to_hex,
-    translate, trim, upper, JoinType, Partitioning,
+    min, now, octet_length, random, regexp_replace, repeat, replace, reverse, right,
+    rpad, rtrim, sha224, sha256, sha384, sha512, split_part, starts_with, strpos, substr,
+    sum, to_hex, translate, trim, upper, JoinType, Partitioning,
 };
 pub use crate::physical_plan::csv::CsvReadOptions;