sql: fix the handling of integer types

Prior to this patch, CockroachDB maintained an unnecessary distinction
between "INT" and "INTEGER", between "BIGINT" and "INT8", etc.

This distinction is unnecessary but also costly, as we were paying the
price of a "name" attribute in coltypes.TInt, with a string comparison
and hash table lookup on every use of the type.

What really matters is that the type shows up properly in
introspection; this has already been ensured by various
OID-to-pgcatalog mappings and the recently introduced
`InformationSchemaTypeName()`.

Any distinction beyond that is unnecessary and can be dropped from the
implementation.

Release note: None

docs/generated/sql/bnf/stmt_block.bnf

@@ -1793,12 +1793,12 @@ reference_actions ::=
 
 numeric ::=
 	'INT'
+	| 'INTEGER'
 	| 'INT2'
+	| 'SMALLINT'
 	| 'INT4'
 	| 'INT8'
 	| 'INT64'
-	| 'INTEGER'
-	| 'SMALLINT'
 	| 'BIGINT'
 	| 'REAL'
 	| 'FLOAT4'

pkg/ccl/importccl/import_stmt_test.go

@@ -483,16 +483,16 @@ COPY t (a, b, c) FROM stdin;
 				ORDER BY descriptor_name
 				`: {{
 					`CREATE TABLE a (
-	i INTEGER NOT NULL,
-	k INTEGER NULL,
+	i INT NOT NULL,
+	k INT NULL,
 	CONSTRAINT a_pkey PRIMARY KEY (i ASC),
 	CONSTRAINT a_k_fkey FOREIGN KEY (k) REFERENCES a (i),
 	INDEX a_auto_index_a_k_fkey (k ASC),
 	CONSTRAINT a_i_fkey FOREIGN KEY (i) REFERENCES b (j),
 	FAMILY "primary" (i, k)
 )`}, {
 					`CREATE TABLE b (
-	j INTEGER NOT NULL,
+	j INT NOT NULL,
 	CONSTRAINT b_pkey PRIMARY KEY (j ASC),
 	CONSTRAINT b_j_fkey FOREIGN KEY (j) REFERENCES a (i),
 	FAMILY "primary" (j)
@@ -631,8 +631,8 @@ const (
 )`
 	testPgdumpCreateWeather = `CREATE TABLE weather (
 	city VARCHAR(80) NULL,
-	temp_lo INTEGER NULL,
-	temp_hi INTEGER NULL,
+	temp_lo INT NULL,
+	temp_hi INT NULL,
 	prcp FLOAT4 NULL,
 	date DATE NULL,
 	CONSTRAINT weather_city_fkey FOREIGN KEY (city) REFERENCES cities (city),
@@ -2220,7 +2220,7 @@ func TestImportPgDump(t *testing.T) {
 				// Verify table schema because PKs and indexes are at the bottom of pg_dump.
 				sqlDB.CheckQueryResults(t, `SHOW CREATE TABLE simple`, [][]string{{
 					"simple", `CREATE TABLE simple (
-	i INTEGER NOT NULL,
+	i INT NOT NULL,
 	s STRING NULL,
 	b BYTES NULL,
 	CONSTRAINT simple_pkey PRIMARY KEY (i ASC),
@@ -2262,7 +2262,7 @@ func TestImportPgDump(t *testing.T) {
 				// Verify table schema because PKs and indexes are at the bottom of pg_dump.
 				sqlDB.CheckQueryResults(t, `SHOW CREATE TABLE second`, [][]string{{
 					"second", `CREATE TABLE second (
-	i INTEGER NOT NULL,
+	i INT NOT NULL,
 	s STRING NULL,
 	CONSTRAINT second_pkey PRIMARY KEY (i ASC),
 	FAMILY "primary" (i, s)
@@ -2296,8 +2296,8 @@ func TestImportPgDump(t *testing.T) {
 			if c.expected == expectAll {
 				sqlDB.CheckQueryResults(t, `SHOW CREATE TABLE seqtable`, [][]string{{
 					"seqtable", `CREATE TABLE seqtable (
-	a INTEGER NULL DEFAULT nextval('public.a_seq':::STRING),
-	b INTEGER NULL,
+	a INT NULL DEFAULT nextval('public.a_seq':::STRING),
+	b INT NULL,
 	FAMILY "primary" (a, b, rowid)
 )`,
 				}})

pkg/ccl/importccl/read_import_mysql.go

@@ -511,25 +511,25 @@ func mysqlColToCockroach(
 		def.Type = coltypes.Bytes
 
 	case mysqltypes.Int8:
-		def.Type = coltypes.SmallInt
+		def.Type = coltypes.Int2
 	case mysqltypes.Uint8:
-		def.Type = coltypes.SmallInt
+		def.Type = coltypes.Int2
 	case mysqltypes.Int16:
-		def.Type = coltypes.SmallInt
+		def.Type = coltypes.Int2
 	case mysqltypes.Uint16:
-		def.Type = coltypes.SmallInt
+		def.Type = coltypes.Int2
 	case mysqltypes.Int24:
-		def.Type = coltypes.Int
+		def.Type = coltypes.Int4
 	case mysqltypes.Uint24:
-		def.Type = coltypes.Int
+		def.Type = coltypes.Int4
 	case mysqltypes.Int32:
-		def.Type = coltypes.Int
+		def.Type = coltypes.Int4
 	case mysqltypes.Uint32:
-		def.Type = coltypes.Int
+		def.Type = coltypes.Int4
 	case mysqltypes.Int64:
-		def.Type = coltypes.BigInt
+		def.Type = coltypes.Int8
 	case mysqltypes.Uint64:
-		def.Type = coltypes.BigInt
+		def.Type = coltypes.Int8
 
 	case mysqltypes.Float32:
 		def.Type = coltypes.Float4
@@ -548,7 +548,7 @@ func mysqlColToCockroach(
 	case mysqltypes.Datetime:
 		def.Type = coltypes.TimestampWithTZ
 	case mysqltypes.Year:
-		def.Type = coltypes.SmallInt
+		def.Type = coltypes.Int2
 
 	case mysqltypes.Enum:
 		def.Type = coltypes.String

pkg/ccl/importccl/read_import_pgdump_test.go

@@ -123,7 +123,7 @@ COPY public.t (s) FROM stdin;
 		}
 		fmt.Fprintf(&sb, "%s;\n", s)
 	}
-	const expect = `CREATE TABLE public.second (i INTEGER NOT NULL, s STRING);
+	const expect = `CREATE TABLE public.second (i INT NOT NULL, s STRING);
 COPY public.second (i, s) FROM STDIN;
 "0"	"0";
 "1"	"1";

pkg/ccl/importccl/testdata/mysqldump/everything.cockroach-schema.sql

@@ -1,5 +1,5 @@
 CREATE TABLE everything (
-  i     INT PRIMARY KEY,
+  i     INT4 PRIMARY KEY,
 
   c     CHAR(10) NOT NULL,
   s     VARCHAR(100),
@@ -21,11 +21,11 @@ CREATE TABLE everything (
   nu    NUMERIC(10, 0),
   d53   DECIMAL(5,3),
 
-  iw    INT NOT NULL,
-  iz    INT,
+  iw    INT4 NOT NULL,
+  iz    INT4,
   ti    SMALLINT,
   si    SMALLINT,
-  mi    INT,
+  mi    INT4,
   bi    BIGINT,
 
   fl    FLOAT4 NOT NULL,

pkg/ccl/importccl/testdata/mysqldump/second.cockroach-schema.sql

@@ -1,6 +1,6 @@
 CREATE TABLE second (
-  i INT PRIMARY KEY,
-  k INT,
+  i INT4 PRIMARY KEY,
+  k INT4,
   UNIQUE INDEX ik (i, k),
   INDEX ki (k, i),
   CONSTRAINT second_ibfk_1 FOREIGN KEY (k) REFERENCES simple (i) ON UPDATE CASCADE

pkg/ccl/importccl/testdata/mysqldump/simple.cockroach-schema.sql

@@ -1,7 +1,7 @@
 CREATE SEQUENCe simple_auto_inc;
 
 CREATE TABLE simple (
-  i INT PRIMARY KEY DEFAULT nextval('simple_auto_inc':::string),
+  i INT4 PRIMARY KEY DEFAULT nextval('simple_auto_inc':::string),
   s text,
   b bytea
 )

pkg/ccl/importccl/testdata/mysqldump/third.cockroach-schema.sql

@@ -1,10 +1,10 @@
 CREATE TABLE third (
-    i INT PRIMARY KEY,
-    a INT,
-    b INT,
-    c INT,
+    i INT4 PRIMARY KEY,
+    a INT4,
+    b INT4,
+    c INT4,
     INDEX a (a, b),
     INDEX c (c),
     FOREIGN KEY (a, b) REFERENCES second (i, k),
     FOREIGN KEY (c) REFERENCES third (i) ON UPDATE CASCADE
-);
+);

pkg/sql/coltypes/aliases.go

@@ -28,29 +28,22 @@ var (
 	Bool = &TBool{}
 
 	// Int is an immutable T instance.
-	Int = &TInt{Name: "INT"}
+	Int = &TInt{}
 	// Int2 is an immutable T instance.
-	Int2 = &TInt{Name: "INT2", Width: 16, ImplicitWidth: true}
+	Int2 = &TInt{Width: 16}
 	// Int4 is an immutable T instance.
-	Int4 = &TInt{Name: "INT4", Width: 32, ImplicitWidth: true}
+	Int4 = &TInt{Width: 32}
 	// Int8 is an immutable T instance.
-	Int8 = &TInt{Name: "INT8"}
-	// Int64 is an immutable T instance.
-	Int64 = &TInt{Name: "INT64"}
-	// Integer is an immutable T instance.
-	Integer = &TInt{Name: "INTEGER"}
-	// SmallInt is an immutable T instance.
-	SmallInt = &TInt{Name: "SMALLINT", Width: 16, ImplicitWidth: true}
-	// BigInt is an immutable T instance.
-	BigInt = &TInt{Name: "BIGINT"}
+	Int8 = &TInt{Width: 64}
+
 	// Serial is an immutable T instance.
-	Serial = &TSerial{IntType: Int}
+	Serial = &TSerial{TInt: Int}
 	// Serial2 is an immutable T instance.
-	Serial2 = &TSerial{IntType: Int2}
+	Serial2 = &TSerial{TInt: Int2}
 	// Serial4 is an immutable T instance.
-	Serial4 = &TSerial{IntType: Int4}
+	Serial4 = &TSerial{TInt: Int4}
 	// Serial8 is an immutable T instance.
-	Serial8 = &TSerial{IntType: Int8}
+	Serial8 = &TSerial{TInt: Int8}
 
 	// Float4 is an immutable T instance.
 	Float4 = &TFloat{Short: true}

pkg/sql/coltypes/arith.go

@@ -34,36 +34,37 @@ func (node *TBool) Format(buf *bytes.Buffer, f lex.EncodeFlags) {
 
 // TInt represents an INT, INTEGER, SMALLINT or BIGINT type.
 type TInt struct {
-	Name          string
-	Width         int
-	ImplicitWidth bool
+	Width int
+}
+
+// IntegerTypeNames maps a TInt data width to a canonical type name.
+var IntegerTypeNames = map[int]string{
+	0:  "INT",
+	16: "INT2",
+	32: "INT4",
+	64: "INT8",
 }
 
 // TypeName implements the ColTypeFormatter interface.
-func (node *TInt) TypeName() string { return node.Name }
+func (node *TInt) TypeName() string { return IntegerTypeNames[node.Width] }
 
 // Format implements the ColTypeFormatter interface.
 func (node *TInt) Format(buf *bytes.Buffer, f lex.EncodeFlags) {
-	buf.WriteString(node.Name)
-	if node.Width > 0 && !node.ImplicitWidth {
-		fmt.Fprintf(buf, "(%d)", node.Width)
-	}
+	buf.WriteString(node.TypeName())
 }
 
 // TSerial represents a SERIAL type.
-type TSerial struct {
-	IntType *TInt
-}
+type TSerial struct{ *TInt }
 
-var serialNames = map[*TInt]string{
-	Int:  "SERIAL",
-	Int2: "SERIAL2",
-	Int4: "SERIAL4",
-	Int8: "SERIAL8",
+var serialNames = map[int]string{
+	0:  "SERIAL",
+	16: "SERIAL2",
+	32: "SERIAL4",
+	64: "SERIAL8",
 }
 
 // TypeName implements the ColTypeFormatter interface.
-func (node *TSerial) TypeName() string { return serialNames[node.IntType] }
+func (node *TSerial) TypeName() string { return serialNames[node.Width] }
 
 // Format implements the ColTypeFormatter interface.
 func (node *TSerial) Format(buf *bytes.Buffer, _ lex.EncodeFlags) {

pkg/sql/logictest/testdata/logic_test/alter_column_type

@@ -111,7 +111,7 @@ query TTBTTTB colnames
 SHOW COLUMNS FROM t
 ----
 column_name  data_type  is_nullable  column_default  generation_expression  indices      is_hidden
-a            INTEGER    true         NULL            ·                      {}           false
+a            INT        true         NULL            ·                      {}           false
 rowid        INT        false        unique_rowid()  ·                      {"primary"}  true
 
 statement ok

pkg/sql/logictest/testdata/logic_test/array

@@ -565,9 +565,9 @@ query TT
 SHOW CREATE TABLE a
 ----
 a  CREATE TABLE a (
-    b SMALLINT[] NULL,
-    FAMILY "primary" (b, rowid)
-  )
+   b INT2[] NULL,
+   FAMILY "primary" (b, rowid)
+)
 
 statement error integer out of range for type SMALLINT \(column "b"\)
 INSERT INTO a VALUES (ARRAY[100000])

pkg/sql/logictest/testdata/logic_test/information_schema

@@ -826,6 +826,9 @@ DROP TABLE nullability
 statement ok
 CREATE TABLE data_types (
   a   INT,
+  a2  INT2,
+  a4  INT4,
+  a8  INT8,
   b   FLOAT,
   br  REAL,
   c   DECIMAL,
@@ -848,6 +851,9 @@ WHERE table_schema = 'public' AND table_name = 'data_types'
 ----
 table_name  column_name  data_type                 crdb_sql_type
 data_types  a            integer                   INT
+data_types  a2           smallint                  INT2
+data_types  a4           integer                   INT4
+data_types  a8           bigint                    INT8
 data_types  b            double precision          FLOAT8
 data_types  br           real                      FLOAT4
 data_types  c            numeric                   DECIMAL

pkg/sql/logictest/testdata/logic_test/pg_catalog

@@ -1270,22 +1270,22 @@ SHOW COLUMNS FROM pg_catalog.pg_stat_activity
 column_name       data_type    is_nullable  column_default  generation_expression  indices  is_hidden
 datid             OID          true         NULL            ·                      {}       false
 datname           NAME         true         NULL            ·                      {}       false
-pid               INTEGER      true         NULL            ·                      {}       false
+pid               INT          true         NULL            ·                      {}       false
 usesysid          OID          true         NULL            ·                      {}       false
 username          NAME         true         NULL            ·                      {}       false
 application_name  STRING       true         NULL            ·                      {}       false
 client_addr       INET         true         NULL            ·                      {}       false
 client_hostname   STRING       true         NULL            ·                      {}       false
-client_port       INTEGER      true         NULL            ·                      {}       false
+client_port       INT          true         NULL            ·                      {}       false
 backend_start     TIMESTAMPTZ  true         NULL            ·                      {}       false
 xact_start        TIMESTAMPTZ  true         NULL            ·                      {}       false
 query_start       TIMESTAMPTZ  true         NULL            ·                      {}       false
 state_change      TIMESTAMPTZ  true         NULL            ·                      {}       false
 wait_event_type   STRING       true         NULL            ·                      {}       false
 wait_event        STRING       true         NULL            ·                      {}       false
 state             STRING       true         NULL            ·                      {}       false
-backend_xid       INTEGER      true         NULL            ·                      {}       false
-backend_xmin      INTEGER      true         NULL            ·                      {}       false
+backend_xid       INT          true         NULL            ·                      {}       false
+backend_xmin      INT          true         NULL            ·                      {}       false
 query             STRING       true         NULL            ·                      {}       false
 
 

pkg/sql/logictest/testdata/logic_test/serial

@@ -241,8 +241,8 @@ query TT
 SHOW CREATE TABLE smallbig
 ----
 smallbig  CREATE TABLE smallbig (
-          a SMALLINT NOT NULL DEFAULT nextval('smallbig_a_seq1':::STRING),
-          b BIGINT NOT NULL DEFAULT nextval('smallbig_b_seq1':::STRING),
+          a INT2 NOT NULL DEFAULT nextval('smallbig_a_seq1':::STRING),
+          b INT8 NOT NULL DEFAULT nextval('smallbig_b_seq1':::STRING),
           c INT NULL,
           FAMILY "primary" (a, b, c, rowid)
 )
@@ -259,9 +259,9 @@ query TT
 SHOW CREATE TABLE serials
 ----
 serials  CREATE TABLE serials (
-         a SMALLINT NOT NULL DEFAULT nextval('serials_a_seq1':::STRING),
-         b INTEGER NOT NULL DEFAULT nextval('serials_b_seq1':::STRING),
-         c BIGINT NOT NULL DEFAULT nextval('serials_c_seq1':::STRING),
+         a INT2 NOT NULL DEFAULT nextval('serials_a_seq1':::STRING),
+         b INT4 NOT NULL DEFAULT nextval('serials_b_seq1':::STRING),
+         c INT8 NOT NULL DEFAULT nextval('serials_c_seq1':::STRING),
          d INT NULL,
          FAMILY "primary" (a, b, c, d, rowid)
 )