fix: fix column.minValue and column.maxValue

Mminimum and maximum values for exact fractional numbers are not possible with native JS types.

src/pg-structure/column.ts

@@ -47,14 +47,8 @@ export default class Column extends DbObject {
     this.arrayDimension = args.arrayDimension || 0;
     this.defaultWithTypeCast = args.defaultWithTypeCast;
     this.attributeNumber = args.attributeNumber;
-
-    if (this.type.numericType !== undefined) {
-      /* istanbul ignore next */
-      const maxLimit = this.precision ? 10 ** (this.precision - (this.scale ?? 0)) : undefined;
-      const minLimit = maxLimit === undefined ? undefined : -maxLimit;
-      this.minValue = this.isSerial ? 1 : NUMERIC_BOUNDRIES?.[this.type.name]?.min ?? minLimit;
-      this.maxValue = NUMERIC_BOUNDRIES?.[this.type.name]?.max ?? maxLimit;
-    }
+    this.minValue = this.isSerial ? 1 : NUMERIC_BOUNDRIES?.[this.type.name]?.min;
+    this.maxValue = NUMERIC_BOUNDRIES?.[this.type.name]?.max;
   }
 
   /**
@@ -241,12 +235,12 @@ export default class Column extends DbObject {
   public readonly length?: number;
 
   /**
-   * For integer and exact numeric columns with scale minimum value of the column.
+   * Minimum value of the column (only for integer types).
    */
   public readonly minValue?: number;
 
   /**
-   * For integer and exact numeric columns with scale maximum value of the column.
+   * Maximum value of the column (only for integer types).
    */
   public readonly maxValue?: number;
 

test/column.test.ts

@@ -145,36 +145,12 @@ describe("Column", () => {
     expect(accountTable.get("id").maxValue).toBe(2147483647);
   });
 
-  it("should not have minimum value for numeric column without precision.", () => {
-    expect(typeTable.get("field2_a").minValue).toBe(undefined);
+  it("should have minimum value for big integer.", () => {
+    expect(typeTable.get("field12").minValue).toBe(-9223372036854775808);
   });
 
-  it("should not have maximum value for numeric column without precision.", () => {
-    expect(typeTable.get("field2_a").maxValue).toBe(undefined);
-  });
-
-  it("should have minimum value for numeric column.", () => {
-    expect(typeTable.get("field2_b").minValue).toBe(-10);
-  });
-
-  it("should have maximum value for numeric column.", () => {
-    expect(typeTable.get("field2_b").maxValue).toBe(10);
-  });
-
-  it("should have minimum value for numeric column with only scale but without scale.", () => {
-    expect(typeTable.get("field2_c").minValue).toBe(-1000);
-  });
-
-  it("should have maximum value for numeric column with only scale but without scale.", () => {
-    expect(typeTable.get("field2_c").maxValue).toBe(1000);
-  });
-
-  it("should not have minimum value for floating column.", () => {
-    expect(typeTable.get("field21").minValue).toBe(undefined);
-  });
-
-  it("should nt have maximum value for floating column.", () => {
-    expect(typeTable.get("field21").maxValue).toBe(undefined);
+  it("should have maximum value for big integer.", () => {
+    expect(typeTable.get("field12").maxValue).toBe(9223372036854775807);
   });
 
   it("should have referencedColumns.", () => {