Added support for the psql syntax.

2 files changed, 91 insertions, 0 deletions

diff --git a/README.md b/README.md
index 38454d5..f1be5f0 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,7 @@ Plugin | Description
 [`language_go`](language_go.lua?raw=1) | Syntax for the [Go](https://golang.org/) programming language
 [`language_jiyu`](language_jiyu.lua?raw=1) | Syntax for the [jiyu](https://github.com/machinamentum/jiyu) programming language
 [`language_odin`](language_odin.lua?raw=1) | Syntax for the [Odin](https://github.com/odin-lang/Odin) programming language
+[`language_psql`](language_psql.lua?raw=1) | Syntax for the postgresql database access language
 [`language_wren`](language_wren.lua?raw=1) | Syntax for the [Wren](http://wren.io/) programming language
 [`macmodkeys`](macmodkeys.lua?raw=1) | Remaps mac modkeys `command/option` to `ctrl/alt`
 [`sort`](sort.lua?raw=1) | Sorts selected lines
diff --git a/language_psql.lua b/language_psql.lua
new file mode 100644
index 0000000..7c6c4b7
--- /dev/null
+++ b/language_psql.lua
@@ -0,0 +1,90 @@
+local syntax = require "core.syntax"
+
+-- In sql symbols can be lower case and upper case
+local keywords = {
+  "CREATE", "SELECT", "INSERT", "INTO", "UPDATE",
+  "DELETE", "TABLE", "DROP", "VALUES", "NOT",
+  "NULL", "PRIMARY", "KEY", "REFERENCES",
+  "DEFAULT", "UNIQUE", "CONSTRAINT", "CHECK",
+  "ON", "EXCLUDE", "WITH", "USING", "WHERE",
+  "GROUP", "BY", "HAVING", "DISTINCT", "LIMIT",
+  "OFFSET", "ONLY", "CROSS", "JOIN", "INNER",
+  "LEFT", "RIGHT", "FULL", "OUTER", "NATURAL",
+  "AND", "OR", "AS", "ORDER", "ORDINALITY",
+  "UNNEST", "FROM", "VIEW", "RETURNS", "SETOF",
+  "LANGUAGE", "SQL", "LIKE", "LATERAL",
+  "INTERVAL", "PARTITION", "UNION", "INTERSECT",
+  "EXCEPT", "ALL", "ASC", "DESC", "NULLS",
+  "FIRST", "LAST", "IN", "RECURSIVE", "ARRAY",
+  "RETURNING", "SET", "ALSO", "INSTEAD",
+  "ALTER", "SEQUENCE", "OWNED", "AT", "ZONE",
+  "WITHOUT", "TO", "TIMEZONE", "TYPE", "ENUM",
+  "DOCUMENT", "XMLPARSE", "XMLSERIALIZE",
+  "CONTENT", "OPTION", "INDEX", "ANY",
+  "EXTENSION", "ISNULL", "NOTNULL", "UNKNOWN",
+  "CASE", "THEN", "WHEN", "ELSE", "END",
+  "ROWS", "BETWEEN", "UNBOUNDED", "PRECEDING",
+  "UNBOUNDED", "FOLLOWING", "EXISTS", "SOME",
+  "COLLATION", "FOR", "TRIGGER", "BEFORE",
+  "EACH", "ROW", "EXECUTE", "PROCEDURE",
+  "FUNCTION", "DECLARE", "BEGIN", "LOOP",
+  "RAISE", "NOTICE", "LOOP", "EVENT",
+  "OPERATOR", "DOMAIN", "VARIADIC", "FOREIGN"
+}
+
+local types = {
+  "BIGINT", "INT8", "BIGSERIAL", "SERIAL8",
+  "BIT", "VARBIT", "BOOLEAN", "BOOL", "BOX",
+  "BYTEA", "CHARACTER", "CHAR", "VARCHAR",
+  "CIDR", "CIRCLE", "DATE", "DOUBLE",
+  "PRECISION", "FLOAT8", "INET", "INTEGER",
+  "INT", "INT4", "INTERVAL", "JSON", "JSONB",
+  "LINE", "LSEG", "MACADDR", "MONEY", "NUMERIC",
+  "DECIMAL", "PATH", "POINT", "POLYGON", "REAL",
+  "FLOAT4", "INT2", "SMALLINT", "SMALLSERIAL",
+  "SERIAL2", "SERIAL", "SERIAL4", "TEXT",
+  "TIME", "TIMEZ", "TIMESTAMP", "TIMESTAMPZ",
+  "TSQUERY", "TSVECTOR", "TXID_SNAPSHOT",
+  "UUID", "XML", "INT4RANGE", "INT8RANGE",
+  "NUMRANGE", "TSRANGE", "TSTZRANGE",
+  "DATERANGE", "PG_LSN"
+}
+
+local literals = {
+  "FALSE", "TRUE", "CURRENT_TIMESTAMP",
+  "CURRENT_TIME", "CURRENT_DATE", "LOCALTIME",
+  "LOCALTIMESTAMP"
+}
+
+local symbols = {}
+for _, keyword in ipairs(keywords) do
+  symbols[keyword:lower()] = "keyword"
+  symbols[keyword] = "keyword"
+end
+
+for _, type in ipairs(types) do
+  symbols[type:lower()] = "keyword2"
+  symbols[type] = "keyword2"
+end
+
+for _, literal in ipairs(literals) do
+  symbols[literal:lower()] = "literal"
+  symbols[literal] = "literal"
+end
+
+syntax.add {
+  files = { "%.sql$", "%.psql$" },
+  comment = "--",
+  patterns = {
+    { pattern = "%-%-.-\n",                type = "comment"  },
+    { pattern = { "/%*", "%*/" },          type = "comment"  },
+    { pattern = { "'", "'", '\\' },        type = "string"   },
+    { pattern = "-?%d+[%d%.eE]*f?",        type = "number"   },
+    { pattern = "-?%.?%d+f?",              type = "number"   },
+    { pattern = "[%+%-=/%*%%<>!~|&@%?$#]", type = "operator" },
+    { pattern = "[%a_][%w_]*%f[(]",        type = "function" },
+    { pattern = "[%a_][%w_]*",             type = "symbol"   },
+  },
+  symbols = symbols,
+}
+