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import {ExpressionNode} from "../../nodes";
import {CurrentScope} from "../_current_scope";
import {IStructureComponent, StructureType, TableKeyType, TableType, UnknownType, VoidType} from "../../types/basic";
import {InlineData} from "./inline_data";
import {Target} from "./target";
import {SQLFrom} from "./sql_from";
import {SQLForAllEntries} from "./sql_for_all_entries";
import {ScopeType} from "../_scope_type";
import {SQLSource} from "./sql_source";
import {SQLCompare} from "./sql_compare";
import {DatabaseTableSource} from "./database_table";
import {AbstractType} from "../../types/basic/_abstract_type";
import {SQLOrderBy} from "./sql_order_by";
import {Dynamic} from "./dynamic";
import {ReferenceType} from "../_reference";
import {SyntaxInput, syntaxIssue} from "../_syntax_input";
type FieldList = {code: string, as: string, expression: ExpressionNode}[];
const isSimple = /^\w+$/;
export class Select {
public static runSyntax(node: ExpressionNode, input: SyntaxInput, skipImplicitInto = false): void {
const token = node.getFirstToken();
const from = node.findDirectExpression(Expressions.SQLFrom);
const dbSources = from ? SQLFrom.runSyntax(from, input) : [];
if (from === undefined) {
const message = `Missing FROM`;
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return;
}
const fields = this.findFields(node, input);
if (fields.length === 0
&& node.findDirectExpression(Expressions.SQLFieldListLoop) === undefined
&& node.findDirectExpression(Expressions.SQLAggregation) === undefined) {
const message = `SELECT: fields missing`;
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return;
}
this.checkFields(fields, dbSources, input, node);
this.handleInto(node, input, fields, dbSources);
const fae = node.findDirectExpression(Expressions.SQLForAllEntries);
if (fae) {
input.scope.push(ScopeType.OpenSQL, "SELECT", token.getStart(), input.filename);
SQLForAllEntries.runSyntax(fae, input);
}
for (const t of node.findAllExpressions(Expressions.Target)) {
Target.runSyntax(t, input);
}
// check implicit into, the target field is implict equal to the table name
if (skipImplicitInto === false
&& node.findDirectExpression(Expressions.SQLIntoTable) === undefined
&& node.findDirectExpression(Expressions.SQLIntoList) === undefined
&& node.findDirectExpression(Expressions.SQLIntoStructure) === undefined) {
const fields = node.findFirstExpression(Expressions.SQLAggregation)?.concatTokens();
const c = new RegExp(/^count\(\s*\*\s*\)$/, "i");
if (fields === undefined || c.test(fields) === false) {
const nameToken = from?.findDirectExpression(Expressions.SQLFromSource);
if (nameToken) {
const found = input.scope.findVariable(nameToken.concatTokens());
if (found) {
input.scope.addReference(nameToken.getFirstToken(), found, ReferenceType.DataWriteReference, input.filename);
} else {
const message = `Target variable ${nameToken.concatTokens()} not found in scope`;
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return;
}
}
}
}
// OFFSET
for (const s of node.findDirectExpressions(Expressions.SQLSource)) {
SQLSource.runSyntax(s, input);
}
for (const up of node.findDirectExpressions(Expressions.SQLUpTo)) {
for (const s of up.findDirectExpressions(Expressions.SQLSource)) {
SQLSource.runSyntax(s, input);
}
}
for (const fae of node.findDirectExpressions(Expressions.SQLForAllEntries)) {
for (const s of fae.findDirectExpressions(Expressions.SQLSource)) {
SQLSource.runSyntax(s, input);
}
}
for (const s of node.findAllExpressions(Expressions.SQLCompare)) {
SQLCompare.runSyntax(s, input, dbSources);
}
for (const s of node.findDirectExpressions(Expressions.SQLOrderBy)) {
SQLOrderBy.runSyntax(s, input);
}
if (this.isStrictMode(node)) {
this.strictModeChecks(node, input);
}
if (input.scope.getType() === ScopeType.OpenSQL) {
input.scope.pop(node.getLastToken().getEnd());
}
}
// there are multiple rules, but gotta start somewhere
private static isStrictMode(node: ExpressionNode) {
const into = node.findDirectExpressionsMulti([Expressions.SQLIntoList, Expressions.SQLIntoStructure, Expressions.SQLIntoTable])[0];
const where = node.findDirectExpression(Expressions.SQLCond);
// INTO is after WHERE
if (into && where && into.getFirstToken().getStart().isAfter(where.getFirstToken().getStart())) {
return true;
}
// FIELDS is used
if (node.findFirstExpression(Expressions.SQLFields)) {
return true;
}
// any field is escaped with @
for (const source of node.findAllExpressions(Expressions.SQLSource)) {
if (source.getFirstToken().getStr() === "@") {
return true;
}
}
// comma used in FROM
const fieldList = node.findFirstExpression(Expressions.SQLFieldList);
if (fieldList && fieldList.findDirectTokenByText(",")) {
return true;
}
return false;
}
private static strictModeChecks(node: ExpressionNode, input: SyntaxInput) {
const sources = node.findAllExpressions(Expressions.SQLSource);
for (const source of sources) {
const first = source.getFirstChild();
if (first?.get() instanceof Expressions.SQLAliasField) {
continue;
} else if (first?.getFirstToken().getStr() === "@") {
continue;
} else if (first?.getChildren()[0].get() instanceof Expressions.Constant) {
continue;
}
const message = `SELECT: "${source.concatTokens()}" must be escaped with @ in strict mode`;
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
}
}
private static handleInto(node: ExpressionNode, input: SyntaxInput, fields: FieldList, dbSources: DatabaseTableSource[]) {
const intoTable = node.findDirectExpression(Expressions.SQLIntoTable);
if (intoTable) {
const inline = intoTable.findFirstExpression(Expressions.InlineData);
if (inline) {
InlineData.runSyntax(inline, input, this.buildTableType(fields, dbSources, input.scope));
}
}
const intoStructure = node.findDirectExpression(Expressions.SQLIntoStructure);
if (intoStructure) {
for (const inline of intoStructure.findAllExpressions(Expressions.InlineData)) {
// todo, for now these are voided
InlineData.runSyntax(inline, input, VoidType.get("SELECT_todo"));
}
}
const intoList = node.findDirectExpression(Expressions.SQLIntoList);
if (intoList) {
const isDynamic = fields.length === 1 && fields[0].expression.findDirectExpression(Expressions.Dynamic) !== undefined;
const targets = intoList.findDirectExpressions(Expressions.SQLTarget);
if (targets.length !== fields.length && isDynamic !== true) {
const message = `number of fields selected vs list does not match`;
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return;
}
for (let i = 0; i < targets.length; i++) {
const target = targets[i];
const field = fields[i];
const inline = target.findFirstExpression(Expressions.InlineData);
if (inline) {
if (isDynamic) {
const message = `dynamic field list, inlining not possible`;
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return;
}
let type: AbstractType = VoidType.get("SELECT_todo");
if (isSimple.test(field.code)) {
for (const dbSource of dbSources) {
if (dbSource === undefined) {
continue;
}
const dbType = dbSource.parseType(input.scope.getRegistry());
if (dbType instanceof StructureType) {
const found = dbType.getComponentByName(field.code);
if (found) {
type = found;
break;
}
}
}
}
InlineData.runSyntax(inline, input, type);
}
}
}
}
private static checkFields(fields: FieldList, dbSources: DatabaseTableSource[], input: SyntaxInput, node: ExpressionNode) {
if (dbSources.length > 1) {
return;
}
const first = dbSources[0];
if (first === undefined) {
// then its voided
return;
}
const type = first.parseType(input.scope.getRegistry());
if (type instanceof VoidType || type instanceof UnknownType) {
return;
}
if (!(type instanceof StructureType)) {
const message = "checkFields, expected structure, " + type.constructor.name;
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return;
}
for (const field of fields) {
if (field.code === "*") {
continue;
}
if (isSimple.test(field.code) && type.getComponentByName(field.code) === undefined) {
const message = `checkFields, field ${field.code} not found`;
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return;
}
}
}
private static buildTableType(fields: FieldList, dbSources: DatabaseTableSource[], scope: CurrentScope) {
if (dbSources.length !== 1) {
return VoidType.get("SELECT_todo");
}
if (dbSources[0] === undefined) {
// then its a voided table
return VoidType.get("SELECT_todo");
}
const dbType = dbSources[0].parseType(scope.getRegistry());
if (!(dbType instanceof StructureType)) {
return VoidType.get("SELECT_todo");
}
if (fields.length === 1 && fields[0].code === "*") {
return new TableType(dbType, {withHeader: false, keyType: TableKeyType.default}, undefined);
}
const allFieldsSimple = fields.every(f => isSimple.test(f.code));
if (allFieldsSimple === true) {
const components: IStructureComponent[] = [];
for (const field of fields) {
const type = dbType.getComponentByName(field.code);
if (type === undefined) {
return VoidType.get("SELECT_todo");
}
components.push({name: field.code, type});
}
return new TableType(new StructureType(components), {withHeader: false, keyType: TableKeyType.default}, undefined);
}
return VoidType.get("SELECT_todo");
}
private static findFields(node: ExpressionNode, input: SyntaxInput): FieldList {
let expr: ExpressionNode | undefined = undefined;
const ret = [];
if (node.get() instanceof Expressions.SelectLoop) {
expr = node.findFirstExpression(Expressions.SQLFieldListLoop);
} else {
expr = node.findFirstExpression(Expressions.SQLFieldList);
}
if (expr?.getFirstChild()?.get() instanceof Expressions.Dynamic) {
Dynamic.runSyntax(expr.getFirstChild() as ExpressionNode, input);
}
for (const field of expr?.findDirectExpressionsMulti([Expressions.SQLField, Expressions.SQLFieldName]) || []) {
let code = field.concatTokens().toUpperCase();
const as = field.findDirectExpression(Expressions.SQLAsName)?.concatTokens() || "";
if (as !== "") {
code = code.replace(" AS " + as, "");
}
ret.push({code, as, expression: field});
}
if (ret.length === 0 && expr) {
ret.push({code: expr.concatTokens(), as: "", expression: expr});
}
return ret;
}
} |