Implement LIKE

Author: Loic

README.md

@@ -157,6 +157,8 @@ assert_eq!(query.to_sql(true), "SELECT name, age FROM contacts");
         u.eq(1, 2),
         // Function, equivalent to {fn: "count", params: ["*"]}
         u.fn('count', ['*']),
+        // Like operator
+        u.like('text', u.string('%t%')),
       ],
       // From expression (optional)
       from: 'a',

sqlsonnet/sql.pest

@@ -5,7 +5,7 @@ COMMENT    = _{ "--" ~ (!"\n" ~ ANY)* ~ ("\n" | EOI) }
 number = @{ ASCII_DIGIT+ }
 string =  { "'" ~ (!"'" ~ ANY)* ~ "'" }
 // literal  = @{ ASCII_ALPHANUMERIC+ |  "*" }
-infix_op =  { "+" | "-" | "*" | "/" | "=" | ">=" | "<=" | ">" | "<" | AND | OR | IN }
+infix_op =  { "+" | "-" | "*" | "/" | "=" | ">=" | "<=" | ">" | "<" | AND | OR | IN | LIKE }
 op_term  =  { !KEYWORD ~ infix_op ~ term }
 expr     =  { term ~ op_term* ~ as? }
 function = ${ identifier ~ "(" ~ exprs ~ ")" }
@@ -37,6 +37,7 @@ ASC      = { ^"asc" }
 DESC     = { ^"desc" }
 AS       = { ^"as" }
 IN       = { ^"in" }
+LIKE       = { ^"like" }
 FROM     = { ^"from" }
 GROUP_BY = { ^"group by" }
 ORDER_BY = { ^"order by" }

sqlsonnet/sqlsonnet.libsonnet

@@ -20,6 +20,7 @@
   gt(a, b): [a, '>', b],
   lt(a, b): [a, '<', b],
   leq(a, b): [a, '<=', b],
+  like(a, b): [a, 'LIKE', b],
   in_(a, b): [a, 'IN', b],
   not(expr): ['NOT', expr],
   // expr AS as, overriding existing aliases.

sqlsonnet/tests/data/example.jsonnet

@@ -21,6 +21,8 @@
         u.fn('count', ['*']),
         // Negation
         u.not(u.neq(1, 2)),
+        // Like operator
+        u.like('text', u.string('%t%')),
       ],
       // From expression (optional)
       // Table name

sqlsonnet/tests/data/example.sql

@@ -8,7 +8,8 @@ SELECT
   1 + 2,
   1 = 2,
   count(*),
-  NOT (1 != 2)
+  NOT (1 != 2),
+  text LIKE '%t%'
 FROM a
 SAMPLE 100
 JOIN b

sqlsonnet/tests/data/test.sql

@@ -33,7 +33,7 @@ JOIN table7
   USING
     c
 WHERE
-  (a = b) AND TRUE AND 1 = 1
+  (a = b) AND TRUE AND 1 = 1 AND a LIKE '%a%'
 GROUP BY
   (a + b) AS c,
   d